206 lines
6.2 KiB
PHP
206 lines
6.2 KiB
PHP
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<?php
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/**
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* This file is part of FPDI
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*
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* @package FPDI
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* @copyright Copyright (c) 2017 Setasign - Jan Slabon (https://www.setasign.com)
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* @license http://opensource.org/licenses/mit-license The MIT License
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* @version 1.6.2
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*/
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/**
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* This file is used as a bridge between TCPDF or FPDF
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* It will dynamically create the class extending the available
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* class FPDF or TCPDF.
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*
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* This way it is possible to use FPDI for both FPDF and TCPDF with one FPDI version.
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*/
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if (!class_exists('TCPDF', false)) {
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/**
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* Class fpdi_bridge
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*/
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class fpdi_bridge extends FPDF
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{
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// empty body
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}
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} else {
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/**
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* Class fpdi_bridge
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*/
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class fpdi_bridge extends TCPDF
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{
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/**
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* Array of Tpl-Data
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*
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* @var array
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*/
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protected $_tpls = array();
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/**
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* Name-prefix of Templates used in Resources-Dictionary
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*
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* @var string A String defining the Prefix used as Template-Object-Names. Have to begin with an /
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*/
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public $tplPrefix = "/TPL";
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/**
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* Current Object Id.
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*
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* @var integer
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*/
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protected $_currentObjId;
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/**
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* Return XObjects Dictionary.
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*
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* Overwritten to add additional XObjects to the resources dictionary of TCPDF
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*
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* @return string
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*/
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protected function _getxobjectdict()
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{
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$out = parent::_getxobjectdict();
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foreach ($this->_tpls as $tplIdx => $tpl) {
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$out .= sprintf('%s%d %d 0 R', $this->tplPrefix, $tplIdx, $tpl['n']);
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}
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return $out;
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}
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/**
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* Writes a PDF value to the resulting document.
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*
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* Prepares the value for encryption of imported data by FPDI
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*
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* @param array $value
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*/
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protected function _prepareValue(&$value)
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{
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switch ($value[0]) {
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case pdf_parser::TYPE_STRING:
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if ($this->encrypted) {
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$value[1] = $this->_unescape($value[1]);
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$value[1] = $this->_encrypt_data($this->_currentObjId, $value[1]);
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$value[1] = TCPDF_STATIC::_escape($value[1]);
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}
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break;
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case pdf_parser::TYPE_STREAM:
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if ($this->encrypted) {
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$value[2][1] = $this->_encrypt_data($this->_currentObjId, $value[2][1]);
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$value[1][1]['/Length'] = array(
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pdf_parser::TYPE_NUMERIC,
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strlen($value[2][1])
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);
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}
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break;
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case pdf_parser::TYPE_HEX:
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if ($this->encrypted) {
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$value[1] = $this->hex2str($value[1]);
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$value[1] = $this->_encrypt_data($this->_currentObjId, $value[1]);
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// remake hexstring of encrypted string
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$value[1] = $this->str2hex($value[1]);
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}
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break;
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}
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}
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/**
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* Un-escapes a PDF string
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*
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* @param string $s
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* @return string
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*/
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protected function _unescape($s)
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{
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$out = '';
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for ($count = 0, $n = strlen($s); $count < $n; $count++) {
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if ($s[$count] != '\\' || $count == $n-1) {
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$out .= $s[$count];
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} else {
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switch ($s[++$count]) {
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case ')':
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case '(':
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case '\\':
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$out .= $s[$count];
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break;
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case 'f':
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$out .= chr(0x0C);
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break;
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case 'b':
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$out .= chr(0x08);
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break;
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case 't':
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$out .= chr(0x09);
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break;
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case 'r':
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$out .= chr(0x0D);
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break;
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case 'n':
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$out .= chr(0x0A);
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break;
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case "\r":
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if ($count != $n-1 && $s[$count+1] == "\n")
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$count++;
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break;
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case "\n":
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break;
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default:
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// Octal-Values
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if (ord($s[$count]) >= ord('0') &&
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ord($s[$count]) <= ord('9')) {
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$oct = ''. $s[$count];
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if (ord($s[$count+1]) >= ord('0') &&
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ord($s[$count+1]) <= ord('9')) {
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$oct .= $s[++$count];
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if (ord($s[$count+1]) >= ord('0') &&
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ord($s[$count+1]) <= ord('9')) {
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$oct .= $s[++$count];
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}
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}
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$out .= chr(octdec($oct));
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} else {
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$out .= $s[$count];
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}
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}
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}
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}
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return $out;
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}
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/**
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* Hexadecimal to string
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*
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* @param string $data
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* @return string
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*/
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public function hex2str($data)
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{
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$data = preg_replace('/[^0-9A-Fa-f]/', '', rtrim($data, '>'));
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if ((strlen($data) % 2) == 1) {
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$data .= '0';
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}
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return pack('H*', $data);
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}
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/**
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* String to hexadecimal
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*
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* @param string $str
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* @return string
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*/
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public function str2hex($str)
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{
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return current(unpack('H*', $str));
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}
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}
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}
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