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<?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 <[email protected]> |
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* |
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* @date 2017-01-03 |
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* |
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* @license LGPLv3 |
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* |
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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 <[email protected]> |
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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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namespace Smalot\PdfParser\Element; |
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use Smalot\PdfParser\Document; |
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use Smalot\PdfParser\Element; |
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use Smalot\PdfParser\Font; |
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/** |
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* Class ElementString |
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*/ |
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class ElementString extends Element |
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{ |
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public function __construct($value) |
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{ |
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parent::__construct($value, null); |
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} |
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2 |
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public function equals($value): bool |
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{ |
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return $value == $this->value; |
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} |
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/** |
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* @return bool|ElementString |
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*/ |
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public static function parse(string $content, ?Document $document = null, int &$offset = 0) |
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{ |
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if (preg_match('/^\s*\((?P<name>.*)/s', $content, $match)) { |
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$name = $match['name']; |
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$delimiterCount = 0; |
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$position = 0; |
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$processedName = ''; |
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do { |
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$char = substr($name, 0, 1); |
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$name = substr($name, 1); |
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++$position; |
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switch ($char) { |
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// matched delimiters should be treated as part of string |
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case '(': |
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$processedName .= $char; |
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4 |
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++$delimiterCount; |
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4 |
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break; |
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68 |
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case ')': |
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if (0 === $delimiterCount) { |
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$name = substr($name, 1); |
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break 2; |
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} |
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4 |
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$processedName .= $char; |
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--$delimiterCount; |
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break; |
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// escaped chars |
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case '\\': |
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$nextChar = substr($name, 0, 1); |
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switch ($nextChar) { |
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// end-of-line markers (CR, LF, CRLF) should be ignored |
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case "\r": |
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case "\n": |
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preg_match('/^\\r?\\n?/', $name, $matches); |
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$name = substr($name, \strlen($matches[0])); |
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$position += \strlen($matches[0]); |
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break; |
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// process LF, CR, HT, BS, FF |
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case 'n': |
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case 't': |
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case 'r': |
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case 'b': |
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case 'f': |
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$processedName .= stripcslashes('\\'.$nextChar); |
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$name = substr($name, 1); |
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++$position; |
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break; |
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// decode escaped parentheses and backslash |
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case '(': |
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case ')': |
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case '\\': |
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case ' ': // TODO: this should probably be removed - kept for compatibility |
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$processedName .= $nextChar; |
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$name = substr($name, 1); |
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++$position; |
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break; |
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// TODO: process octal encoding (but it is also processed later) |
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// keep backslash in other cases |
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default: |
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$processedName .= $char; |
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} |
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break; |
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default: |
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$processedName .= $char; |
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} |
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} while (\strlen($name)); |
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$offset += strpos($content, '(') + 1 + $position; |
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$name = $processedName; |
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// Decode string. |
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$name = Font::decodeOctal($name); |
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$name = Font::decodeEntities($name); |
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$name = Font::decodeHexadecimal($name, false); |
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$name = Font::decodeUnicode($name); |
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return new self($name); |
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} |
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return false; |
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} |
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} |
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smalot /
pdfparser
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