* @date 2017-01-03 * @license LGPLv3 * @url * * PdfParser is a pdf library written in PHP, extraction oriented. * Copyright (C) 2017 - Sébastien MALOT * * 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 . * */ namespace Smalot\PdfParser; /** * Class Font * * @package Smalot\PdfParser */ class Font extends PDFObject { /** * */ const MISSING = '?'; /** * @var array */ protected $table = null; /** * @var array */ protected $tableSizes = null; /** * */ public function init() { // Load translate table. $this->loadTranslateTable(); } /** * @return string */ public function getName() { return $this->has('BaseFont') ? (string)$this->get('BaseFont') : '[Unknown]'; } /** * @return string */ public function getType() { return (string)$this->header->get('Subtype'); } /** * @return array */ public function getDetails($deep = true) { $details = array(); $details['Name'] = $this->getName(); $details['Type'] = $this->getType(); $details['Encoding'] = ($this->has('Encoding') ? (string)$this->get('Encoding') : 'Ansi'); $details += parent::getDetails($deep); return $details; } /** * @param string $char * @param bool $use_default * * @return string */ public function translateChar($char, $use_default = true) { $dec = hexdec(bin2hex($char)); if (array_key_exists($dec, $this->table)) { $char = $this->table[$dec]; } else { $char = ($use_default ? self::MISSING : $char); } return $char; } /** * @param int $code * * @return string */ public static function uchr($code) { return html_entity_decode('&#' . ((int)$code) . ';', ENT_NOQUOTES, 'UTF-8'); } /** * @return array */ public function loadTranslateTable() { if (!is_null($this->table)) { return $this->table; } $this->table = array(); $this->tableSizes = array( 'from' => 1, 'to' => 1, ); if ($this->has('ToUnicode')) { $content = $this->get('ToUnicode')->getContent(); $matches = array(); // Support for multiple spacerange sections if (preg_match_all('/begincodespacerange(?P.*?)endcodespacerange/s', $content, $matches)) { foreach ($matches['sections'] as $section) { $regexp = '/<(?P[0-9A-F]+)> *<(?P[0-9A-F]+)>[ \r\n]+/is'; preg_match_all($regexp, $section, $matches); $this->tableSizes = array( 'from' => max(1, strlen(current($matches['from'])) / 2), 'to' => max(1, strlen(current($matches['to'])) / 2), ); break; } } // Support for multiple bfchar sections if (preg_match_all('/beginbfchar(?P.*?)endbfchar/s', $content, $matches)) { foreach ($matches['sections'] as $section) { $regexp = '/<(?P[0-9A-F]+)> +<(?P[0-9A-F]+)>[ \r\n]+/is'; preg_match_all($regexp, $section, $matches); $this->tableSizes['from'] = max(1, strlen(current($matches['from'])) / 2); foreach ($matches['from'] as $key => $from) { $parts = preg_split( '/([0-9A-F]{4})/i', $matches['to'][$key], 0, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE ); $text = ''; foreach ($parts as $part) { $text .= self::uchr(hexdec($part)); } $this->table[hexdec($from)] = $text; } } } // Support for multiple bfrange sections if (preg_match_all('/beginbfrange(?P.*?)endbfrange/s', $content, $matches)) { foreach ($matches['sections'] as $section) { // Support for : $regexp = '/<(?P[0-9A-F]+)> *<(?P[0-9A-F]+)> *<(?P[0-9A-F]+)>[ \r\n]+/is'; preg_match_all($regexp, $section, $matches); foreach ($matches['from'] as $key => $from) { $char_from = hexdec($from); $char_to = hexdec($matches['to'][$key]); $offset = hexdec($matches['offset'][$key]); for ($char = $char_from; $char <= $char_to; $char++) { $this->table[$char] = self::uchr($char - $char_from + $offset); } } // Support for : [ ... ] // Some PDF file has 2-byte Unicode values on new lines > added \r\n $regexp = '/<(?P[0-9A-F]+)> *<(?P[0-9A-F]+)> *\[(?P[\r\n<>0-9A-F ]+)\][ \r\n]+/is'; preg_match_all($regexp, $section, $matches); foreach ($matches['from'] as $key => $from) { $char_from = hexdec($from); $strings = array(); preg_match_all('/<(?P[0-9A-F]+)> */is', $matches['strings'][$key], $strings); foreach ($strings['string'] as $position => $string) { $parts = preg_split( '/([0-9A-F]{4})/i', $string, 0, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE ); $text = ''; foreach ($parts as $part) { $text .= self::uchr(hexdec($part)); } $this->table[$char_from + $position] = $text; } } } } } return $this->table; } /** * @param array $table */ public function setTable($table) { $this->table = $table; } /** * @param string $hexa * @param bool $add_braces * * @return string */ public static function decodeHexadecimal($hexa, $add_braces = false) { // Special shortcut for XML content. if (stripos($hexa, ')/si', $hexa, -1, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE); foreach ($parts as $part) { if (preg_match('/^<.*>$/', $part) && stripos($part, ''); if ($add_braces) { $text .= '('; } $part = pack('H*', $part); $text .= ($add_braces ? preg_replace('/\\\/s', '\\\\\\', $part) : $part); if ($add_braces) { $text .= ')'; } } else { $text .= $part; } } return $text; } /** * @param string $text * * @return string */ public static function decodeOctal($text) { $parts = preg_split('/(\\\\\d{3})/s', $text, -1, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE); $text = ''; foreach ($parts as $part) { if (preg_match('/^\\\\\d{3}$/', $part)) { $text .= chr(octdec(trim($part, '\\'))); } else { $text .= $part; } } return $text; } /** * @param $text * * @return string */ public static function decodeEntities($text) { $parts = preg_split('/(#\d{2})/s', $text, -1, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE); $text = ''; foreach ($parts as $part) { if (preg_match('/^#\d{2}$/', $part)) { $text .= chr(hexdec(trim($part, '#'))); } else { $text .= $part; } } return $text; } /** * @param string $text * * @return string */ public static function decodeUnicode($text) { if (preg_match('/^\xFE\xFF/i', $text)) { // Strip U+FEFF byte order marker. $decode = substr($text, 2); $text = ''; $length = strlen($decode); for ($i = 0; $i < $length; $i += 2) { $text .= self::uchr(hexdec(bin2hex(substr($decode, $i, 2)))); } } return $text; } /** * @return int */ protected function getFontSpaceLimit() { return -50; } /** * @param array $commands * * @return string */ public function decodeText($commands) { $word_position = 0; $words = array(); $unicode = false; $font_space = $this->getFontSpaceLimit(); foreach ($commands as $command) { switch ($command[PDFObject::TYPE]) { case 'n': if (floatval(trim($command[PDFObject::COMMAND])) < $font_space) { $word_position = count($words); } continue(2); case '<': // Decode hexadecimal. $text = self::decodeHexadecimal('<' . $command[PDFObject::COMMAND] . '>'); if (mb_check_encoding($text, "UTF-8")) { $unicode = true; } break; default: // Decode octal (if necessary). $text = self::decodeOctal($command[PDFObject::COMMAND]); } // replace escaped chars $text = str_replace( array('\\\\', '\(', '\)', '\n', '\r', '\t', '\ '), array('\\', '(', ')', "\n", "\r", "\t", ' '), $text ); // add content to result string if (isset($words[$word_position])) { $words[$word_position] .= $text; } else { $words[$word_position] = $text; } } foreach ($words as &$word) { $loop_unicode = $unicode; $word = $this->decodeContent($word, $loop_unicode); } return implode(' ', $words); } /** * @param string $text * @param bool $unicode * * @return string */ protected function decodeContent($text, &$unicode) { if ($this->has('ToUnicode')) { $bytes = $this->tableSizes['from']; if ($bytes) { $result = ''; $length = strlen($text); for ($i = 0; $i < $length; $i += $bytes) { $char = substr($text, $i, $bytes); if (($decoded = $this->translateChar($char, false)) !== false) { $char = $decoded; } elseif ($this->has('DescendantFonts')) { if ($this->get('DescendantFonts') instanceof PDFObject) { $fonts = $this->get('DescendantFonts')->getHeader()->getElements(); } else { $fonts = $this->get('DescendantFonts')->getContent(); } $decoded = false; foreach ($fonts as $font) { if ($font instanceof Font) { if (($decoded = $font->translateChar($char, false)) !== false) { $decoded = mb_convert_encoding($decoded, 'UTF-8', 'Windows-1252'); break; } } } if ($decoded !== false) { $char = $decoded; } else { $char = mb_convert_encoding($char, 'UTF-8', 'Windows-1252'); } } else { $char = self::MISSING; } $result .= $char; } $text = $result; // By definition, this code generates unicode chars. $unicode = true; } } elseif ($this->has('Encoding')) { /** @var Encoding $encoding */ $encoding = $this->get('Encoding'); if ($encoding instanceof Encoding) { if ($unicode) { $chars = preg_split( '//s' . ($unicode ? 'u' : ''), $text, -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY ); $result = ''; foreach ($chars as $char) { $dec_av = hexdec(bin2hex($char)); $dec_ap = $encoding->translateChar($dec_av); $result .= self::uchr($dec_ap); } $text = $result; } else { $result = ''; $length = strlen($text); for ($i = 0; $i < $length; $i++) { $dec_av = hexdec(bin2hex($text[$i])); $dec_ap = $encoding->translateChar($dec_av); $result .= chr($dec_ap); } $text = $result; if ($encoding->get('BaseEncoding')->equals('MacRomanEncoding')) { $text = mb_convert_encoding($text, 'UTF-8', 'Mac'); return $text; } } } } // Convert to unicode if not already done. if (!$unicode) { if ($this->get('Encoding') instanceof Element && $this->get('Encoding')->equals('MacRomanEncoding') ) { $text = mb_convert_encoding($text, 'UTF-8', 'Mac'); } else { $text = mb_convert_encoding($text, 'UTF-8', 'Windows-1252'); } } return $text; } }