| 1 | <?php |
| 2 | /** |
| 3 | * "Inline" diff renderer. |
| 4 | * |
| 5 | * Copyright 2004-2010 The Horde Project (http://www.horde.org/) |
| 6 | * |
| 7 | * See the enclosed file COPYING for license information (LGPL). If you did |
| 8 | * not receive this file, see http://opensource.org/licenses/lgpl-license.php. |
| 9 | * |
| 10 | * @author Ciprian Popovici |
| 11 | * @package Text_Diff |
| 12 | */ |
| 13 | |
| 14 | /** Text_Diff_Renderer */ |
| 15 | |
| 16 | // WP #7391 |
| 17 | require_once dirname(dirname(__FILE__)) . '/Renderer.php'; |
| 18 | |
| 19 | /** |
| 20 | * "Inline" diff renderer. |
| 21 | * |
| 22 | * This class renders diffs in the Wiki-style "inline" format. |
| 23 | * |
| 24 | * @author Ciprian Popovici |
| 25 | * @package Text_Diff |
| 26 | */ |
| 27 | class Text_Diff_Renderer_inline extends Text_Diff_Renderer { |
| 28 | |
| 29 | /** |
| 30 | * Number of leading context "lines" to preserve. |
| 31 | * |
| 32 | * @var integer |
| 33 | */ |
| 34 | var $_leading_context_lines = 10000; |
| 35 | |
| 36 | /** |
| 37 | * Number of trailing context "lines" to preserve. |
| 38 | * |
| 39 | * @var integer |
| 40 | */ |
| 41 | var $_trailing_context_lines = 10000; |
| 42 | |
| 43 | /** |
| 44 | * Prefix for inserted text. |
| 45 | * |
| 46 | * @var string |
| 47 | */ |
| 48 | var $_ins_prefix = '<ins>'; |
| 49 | |
| 50 | /** |
| 51 | * Suffix for inserted text. |
| 52 | * |
| 53 | * @var string |
| 54 | */ |
| 55 | var $_ins_suffix = '</ins>'; |
| 56 | |
| 57 | /** |
| 58 | * Prefix for deleted text. |
| 59 | * |
| 60 | * @var string |
| 61 | */ |
| 62 | var $_del_prefix = '<del>'; |
| 63 | |
| 64 | /** |
| 65 | * Suffix for deleted text. |
| 66 | * |
| 67 | * @var string |
| 68 | */ |
| 69 | var $_del_suffix = '</del>'; |
| 70 | |
| 71 | /** |
| 72 | * Header for each change block. |
| 73 | * |
| 74 | * @var string |
| 75 | */ |
| 76 | var $_block_header = ''; |
| 77 | |
| 78 | /** |
| 79 | * Whether to split down to character-level. |
| 80 | * |
| 81 | * @var boolean |
| 82 | */ |
| 83 | var $_split_characters = false; |
| 84 | |
| 85 | /** |
| 86 | * What are we currently splitting on? Used to recurse to show word-level |
| 87 | * or character-level changes. |
| 88 | * |
| 89 | * @var string |
| 90 | */ |
| 91 | var $_split_level = 'lines'; |
| 92 | |
| 93 | function _blockHeader($xbeg, $xlen, $ybeg, $ylen) |
| 94 | { |
| 95 | return $this->_block_header; |
| 96 | } |
| 97 | |
| 98 | function _startBlock($header) |
| 99 | { |
| 100 | return $header; |
| 101 | } |
| 102 | |
| 103 | function _lines($lines, $prefix = ' ', $encode = true) |
| 104 | { |
| 105 | if ($encode) { |
| 106 | array_walk($lines, array(&$this, '_encode')); |
| 107 | } |
| 108 | |
| 109 | if ($this->_split_level == 'lines') { |
| 110 | return implode("\n", $lines) . "\n"; |
| 111 | } else { |
| 112 | return implode('', $lines); |
| 113 | } |
| 114 | } |
| 115 | |
| 116 | function _added($lines) |
| 117 | { |
| 118 | array_walk($lines, array(&$this, '_encode')); |
| 119 | $lines[0] = $this->_ins_prefix . $lines[0]; |
| 120 | $lines[count($lines) - 1] .= $this->_ins_suffix; |
| 121 | return $this->_lines($lines, ' ', false); |
| 122 | } |
| 123 | |
| 124 | function _deleted($lines, $words = false) |
| 125 | { |
| 126 | array_walk($lines, array(&$this, '_encode')); |
| 127 | $lines[0] = $this->_del_prefix . $lines[0]; |
| 128 | $lines[count($lines) - 1] .= $this->_del_suffix; |
| 129 | return $this->_lines($lines, ' ', false); |
| 130 | } |
| 131 | |
| 132 | function _changed($orig, $final) |
| 133 | { |
| 134 | /* If we've already split on characters, just display. */ |
| 135 | if ($this->_split_level == 'characters') { |
| 136 | return $this->_deleted($orig) |
| 137 | . $this->_added($final); |
| 138 | } |
| 139 | |
| 140 | /* If we've already split on words, just display. */ |
| 141 | if ($this->_split_level == 'words') { |
| 142 | $prefix = ''; |
| 143 | while ($orig[0] !== false && $final[0] !== false && |
| 144 | substr($orig[0], 0, 1) == ' ' && |
| 145 | substr($final[0], 0, 1) == ' ') { |
| 146 | $prefix .= substr($orig[0], 0, 1); |
| 147 | $orig[0] = substr($orig[0], 1); |
| 148 | $final[0] = substr($final[0], 1); |
| 149 | } |
| 150 | return $prefix . $this->_deleted($orig) . $this->_added($final); |
| 151 | } |
| 152 | |
| 153 | $text1 = implode("\n", $orig); |
| 154 | $text2 = implode("\n", $final); |
| 155 | |
| 156 | /* Non-printing newline marker. */ |
| 157 | $nl = "\0"; |
| 158 | |
| 159 | if ($this->_split_characters) { |
| 160 | $diff = new Text_Diff('native', |
| 161 | array(preg_split('//', $text1), |
| 162 | preg_split('//', $text2))); |
| 163 | } else { |
| 164 | /* We want to split on word boundaries, but we need to preserve |
| 165 | * whitespace as well. Therefore we split on words, but include |
| 166 | * all blocks of whitespace in the wordlist. */ |
| 167 | $diff = new Text_Diff('native', |
| 168 | array($this->_splitOnWords($text1, $nl), |
| 169 | $this->_splitOnWords($text2, $nl))); |
| 170 | } |
| 171 | |
| 172 | /* Get the diff in inline format. */ |
| 173 | $renderer = new Text_Diff_Renderer_inline |
| 174 | (array_merge($this->getParams(), |
| 175 | array('split_level' => $this->_split_characters ? 'characters' : 'words'))); |
| 176 | |
| 177 | /* Run the diff and get the output. */ |
| 178 | return str_replace($nl, "\n", $renderer->render($diff)) . "\n"; |
| 179 | } |
| 180 | |
| 181 | function _splitOnWords($string, $newlineEscape = "\n") |
| 182 | { |
| 183 | // Ignore \0; otherwise the while loop will never finish. |
| 184 | $string = str_replace("\0", '', $string); |
| 185 | |
| 186 | $words = array(); |
| 187 | $length = strlen($string); |
| 188 | $pos = 0; |
| 189 | |
| 190 | while ($pos < $length) { |
| 191 | // Eat a word with any preceding whitespace. |
| 192 | $spaces = strspn(substr($string, $pos), " \n"); |
| 193 | $nextpos = strcspn(substr($string, $pos + $spaces), " \n"); |
| 194 | $words[] = str_replace("\n", $newlineEscape, substr($string, $pos, $spaces + $nextpos)); |
| 195 | $pos += $spaces + $nextpos; |
| 196 | } |
| 197 | |
| 198 | return $words; |
| 199 | } |
| 200 | |
| 201 | function _encode(&$string) |
| 202 | { |
| 203 | $string = htmlspecialchars($string); |
| 204 | } |
| 205 | |
| 206 | } |
| 207 | |