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| 1 | <?php |
| 2 | |
| 3 | /** |
| 4 | * This file is part of PHPWord - A pure PHP library for reading and writing |
| 5 | * word processing documents. |
| 6 | * |
| 7 | * PHPWord is free software distributed under the terms of the GNU Lesser |
| 8 | * General Public License version 3 as published by the Free Software Foundation. |
| 9 | * |
| 10 | * For the full copyright and license information, please read the LICENSE |
| 11 | * file that was distributed with this source code. For the full list of |
| 12 | * contributors, visit https://github.com/PHPOffice/PHPWord/contributors. |
| 13 | * |
| 14 | * @see https://github.com/PHPOffice/PHPWord |
| 15 | * |
| 16 | * @license http://www.gnu.org/licenses/lgpl.txt LGPL version 3 |
| 17 | */ |
| 18 | |
| 19 | namespace PhpOffice\PhpWord\Escaper; |
| 20 | |
| 21 | /** |
| 22 | * @since 0.13.0 |
| 23 | * |
| 24 | * @codeCoverageIgnore |
| 25 | */ |
| 26 | class Rtf extends AbstractEscaper |
| 27 | { |
| 28 | protected function escapeAsciiCharacter($code) |
| 29 | { |
| 30 | if ($code == 9) { |
| 31 | return '{\\tab}'; |
| 32 | } |
| 33 | if (0x20 > $code || $code >= 0x80) { |
| 34 | return '{\\u' . $code . '}'; |
| 35 | } |
| 36 | if ($code == 123 || $code == 125 || $code == 92) { // open or close brace or backslash |
| 37 | return '\\' . chr($code); |
| 38 | } |
| 39 | |
| 40 | return chr($code); |
| 41 | } |
| 42 | |
| 43 | protected function escapeMultibyteCharacter($code) |
| 44 | { |
| 45 | return '\\uc0{\\u' . $code . '}'; |
| 46 | } |
| 47 | |
| 48 | /** |
| 49 | * @see http://www.randomchaos.com/documents/?source=php_and_unicode |
| 50 | * |
| 51 | * @param ?string $input |
| 52 | */ |
| 53 | protected function escapeSingleValue($input) |
| 54 | { |
| 55 | $escapedValue = ''; |
| 56 | |
| 57 | $numberOfBytes = 1; |
| 58 | $bytes = []; |
| 59 | for ($i = 0; $i < strlen($input); ++$i) { |
| 60 | $character = $input[$i]; |
| 61 | $asciiCode = ord($character); |
| 62 | |
| 63 | if ($asciiCode < 128) { |
| 64 | $escapedValue .= $this->escapeAsciiCharacter($asciiCode); |
| 65 | } else { |
| 66 | if (0 == count($bytes)) { |
| 67 | if ($asciiCode < 224) { |
| 68 | $numberOfBytes = 2; |
| 69 | } elseif ($asciiCode < 240) { |
| 70 | $numberOfBytes = 3; |
| 71 | } elseif ($asciiCode < 248) { |
| 72 | $numberOfBytes = 4; |
| 73 | } |
| 74 | } |
| 75 | |
| 76 | $bytes[] = $asciiCode; |
| 77 | |
| 78 | if ($numberOfBytes == count($bytes)) { |
| 79 | if (4 == $numberOfBytes) { |
| 80 | $multibyteCode = ($bytes[0] % 8) * 262144 + ($bytes[1] % 64) * 4096 + ($bytes[2] % 64) * 64 + ($bytes[3] % 64); |
| 81 | } elseif (3 == $numberOfBytes) { |
| 82 | $multibyteCode = ($bytes[0] % 16) * 4096 + ($bytes[1] % 64) * 64 + ($bytes[2] % 64); |
| 83 | } else { |
| 84 | $multibyteCode = ($bytes[0] % 32) * 64 + ($bytes[1] % 64); |
| 85 | } |
| 86 | |
| 87 | if (65279 != $multibyteCode) { |
| 88 | $escapedValue .= $multibyteCode < 128 ? $this->escapeAsciiCharacter($multibyteCode) : $this->escapeMultibyteCharacter($multibyteCode); |
| 89 | } |
| 90 | |
| 91 | $numberOfBytes = 1; |
| 92 | $bytes = []; |
| 93 | } |
| 94 | } |
| 95 | } |
| 96 | |
| 97 | return $escapedValue; |
| 98 | } |
| 99 | } |