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- <?php
- /**
- * This file is part of PHPWord - A pure PHP library for reading and writing
- * word processing documents.
- *
- * PHPWord is free software distributed under the terms of the GNU Lesser
- * General Public License version 3 as published by the Free Software Foundation.
- *
- * For the full copyright and license information, please read the LICENSE
- * file that was distributed with this source code. For the full list of
- * contributors, visit https://github.com/PHPOffice/PHPWord/contributors.
- *
- * @see https://github.com/PHPOffice/PHPWord
- * @copyright 2010-2018 PHPWord contributors
- * @license http://www.gnu.org/licenses/lgpl.txt LGPL version 3
- */
- namespace PhpOffice\PhpWord\Escaper;
- /**
- * @since 0.13.0
- *
- * @codeCoverageIgnore
- */
- class Rtf extends AbstractEscaper
- {
- protected function escapeAsciiCharacter($code)
- {
- if ($code == 9) {
- return '{\\tab}';
- }
- if (0x20 > $code || $code >= 0x80) {
- return '{\\u' . $code . '}';
- }
- if ($code == 123 || $code == 125 || $code == 92) { // open or close brace or backslash
- return '\\' . chr($code);
- }
- return chr($code);
- }
- protected function escapeMultibyteCharacter($code)
- {
- return '\\uc0{\\u' . $code . '}';
- }
- /**
- * @see http://www.randomchaos.com/documents/?source=php_and_unicode
- * @param string $input
- */
- protected function escapeSingleValue($input)
- {
- $escapedValue = '';
- $numberOfBytes = 1;
- $bytes = array();
- for ($i = 0; $i < strlen($input); ++$i) {
- $character = $input[$i];
- $asciiCode = ord($character);
- if ($asciiCode < 128) {
- $escapedValue .= $this->escapeAsciiCharacter($asciiCode);
- } else {
- if (0 == count($bytes)) {
- if ($asciiCode < 224) {
- $numberOfBytes = 2;
- } elseif ($asciiCode < 240) {
- $numberOfBytes = 3;
- } elseif ($asciiCode < 248) {
- $numberOfBytes = 4;
- }
- }
- $bytes[] = $asciiCode;
- if ($numberOfBytes == count($bytes)) {
- if (4 == $numberOfBytes) {
- $multibyteCode = ($bytes[0] % 8) * 262144 + ($bytes[1] % 64) * 4096 + ($bytes[2] % 64) * 64 + ($bytes[3] % 64);
- } elseif (3 == $numberOfBytes) {
- $multibyteCode = ($bytes[0] % 16) * 4096 + ($bytes[1] % 64) * 64 + ($bytes[2] % 64);
- } else {
- $multibyteCode = ($bytes[0] % 32) * 64 + ($bytes[1] % 64);
- }
- if (65279 != $multibyteCode) {
- $escapedValue .= $multibyteCode < 128 ? $this->escapeAsciiCharacter($multibyteCode) : $this->escapeMultibyteCharacter($multibyteCode);
- }
- $numberOfBytes = 1;
- $bytes = array();
- }
- }
- }
- return $escapedValue;
- }
- }
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