142 lines
3.9 KiB
PHP
142 lines
3.9 KiB
PHP
<?php
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/**
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* @file
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* This file is part of the PdfParser library.
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*
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* @author Sébastien MALOT <sebastien@malot.fr>
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* @date 2017-01-03
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* @license LGPLv3
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* @url <https://github.com/smalot/pdfparser>
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*
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* PdfParser is a pdf library written in PHP, extraction oriented.
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* Copyright (C) 2017 - Sébastien MALOT <sebastien@malot.fr>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program.
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* If not, see <http://www.pdfparser.org/sites/default/LICENSE.txt>.
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*
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*/
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namespace Smalot\PdfParser;
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use Smalot\PdfParser\Element\ElementNumeric;
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/**
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* Class Encoding
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*
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* @package Smalot\PdfParser
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*/
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class Encoding extends Object
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{
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/**
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* @var array
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*/
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protected $encoding;
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/**
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* @var array
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*/
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protected $differences;
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/**
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* @var array
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*/
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protected $mapping;
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/**
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*
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*/
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public function init()
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{
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$this->mapping = array();
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$this->differences = array();
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$this->encoding = null;
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if ($this->has('BaseEncoding')) {
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// Load reference table charset.
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$baseEncoding = preg_replace('/[^A-Z0-9]/is', '', $this->get('BaseEncoding')->getContent());
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$className = '\\Smalot\\PdfParser\\Encoding\\' . $baseEncoding;
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if (class_exists($className)) {
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$class = new $className();
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$this->encoding = $class->getTranslations();
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} else {
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throw new \Exception('Missing encoding data for: "' . $baseEncoding . '".');
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}
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// Build table including differences.
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$differences = $this->get('Differences')->getContent();
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$code = 0;
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if (!is_array($differences)) {
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return;
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}
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foreach ($differences as $difference) {
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/** @var ElementNumeric $difference */
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if ($difference instanceof ElementNumeric) {
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$code = $difference->getContent();
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continue;
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}
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// ElementName
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if (is_object($difference)) {
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$this->differences[$code] = $difference->getContent();
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} else {
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$this->differences[$code] = $difference;
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}
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// For the next char.
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$code++;
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}
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// Build final mapping (custom => standard).
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$table = array_flip(array_reverse($this->encoding, true));
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foreach ($this->differences as $code => $difference) {
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/** @var string $difference */
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$this->mapping[$code] = (isset($table[$difference]) ? $table[$difference] : Font::MISSING);
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}
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}
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}
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/**
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* @return array
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*/
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public function getDetails($deep = true)
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{
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$details = array();
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$details['BaseEncoding'] = ($this->has('BaseEncoding') ? (string)$this->get('BaseEncoding') : 'Ansi');
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$details['Differences'] = ($this->has('Differences') ? (string)$this->get('Differences') : '');
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$details += parent::getDetails($deep);
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return $details;
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}
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/**
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* @param int $char
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*
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* @return int
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*/
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public function translateChar($dec)
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{
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if (isset($this->mapping[$dec])) {
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$dec = $this->mapping[$dec];
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}
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return $dec;
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}
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}
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