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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;
use Smalot\PdfParser\Element\ElementArray;
use Smalot\PdfParser\Element\ElementBoolean;
use Smalot\PdfParser\Element\ElementDate;
use Smalot\PdfParser\Element\ElementHexa;
use Smalot\PdfParser\Element\ElementName;
use Smalot\PdfParser\Element\ElementNull;
use Smalot\PdfParser\Element\ElementNumeric;
use Smalot\PdfParser\Element\ElementString;
use Smalot\PdfParser\Element\ElementStruct;
use Smalot\PdfParser\Element\ElementXRef;
/**
* Class Element
*/
class Element
{
/**
* @var Document|null
*/
protected $document;
protected $value;
public function __construct($value, ?Document $document = null)
{
$this->value = $value;
$this->document = $document;
}
public function init()
{
}
public function equals($value): bool
{
return $value == $this->value;
}
public function contains($value): bool
{
if (\is_array($this->value)) {
/** @var Element $val */
foreach ($this->value as $val) {
if ($val->equals($value)) {
return true;
}
}
return false;
}
return $this->equals($value);
}
public function getContent()
{
return $this->value;
}
public function __toString(): string
{
return (string) $this->value;
}
public static function parse(string $content, ?Document $document = null, int &$position = 0)
{
$args = \func_get_args();
$only_values = isset($args[3]) ? $args[3] : false;
$content = trim($content);
$values = [];
do {
$old_position = $position;
if (!$only_values) {
if (!preg_match('/\G\s*(?P<name>\/[A-Z#0-9\._]+)(?P<value>.*)/si', $content, $match, 0, $position)) {
break;
} else {
$name = preg_replace_callback(
'/#([0-9a-f]{2})/i',
function ($m) {
return \chr(base_convert($m[1], 16, 10));
},
ltrim($match['name'], '/')
);
$value = $match['value'];
$position = strpos($content, $value, $position + \strlen($match['name']));
}
} else {
$name = \count($values);
$value = substr($content, $position);
}
if ($element = ElementName::parse($value, $document, $position)) {
$values[$name] = $element;
} elseif ($element = ElementXRef::parse($value, $document, $position)) {
$values[$name] = $element;
} elseif ($element = ElementNumeric::parse($value, $document, $position)) {
$values[$name] = $element;
} elseif ($element = ElementStruct::parse($value, $document, $position)) {
$values[$name] = $element;
} elseif ($element = ElementBoolean::parse($value, $document, $position)) {
$values[$name] = $element;
} elseif ($element = ElementNull::parse($value, $document, $position)) {
$values[$name] = $element;
} elseif ($element = ElementDate::parse($value, $document, $position)) {
$values[$name] = $element;
} elseif ($element = ElementString::parse($value, $document, $position)) {
$values[$name] = $element;
} elseif ($element = ElementHexa::parse($value, $document, $position)) {
$values[$name] = $element;
} elseif ($element = ElementArray::parse($value, $document, $position)) {
$values[$name] = $element;
} else {
$position = $old_position;
break;
}
} while ($position < \strlen($content));
return $values;
}
}
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