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Diffstat (limited to 'wp-includes/Text/Diff/Renderer/inline.php')
| -rw-r--r-- | wp-includes/Text/Diff/Renderer/inline.php | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/wp-includes/Text/Diff/Renderer/inline.php b/wp-includes/Text/Diff/Renderer/inline.php new file mode 100644 index 0000000..52444f8 --- /dev/null +++ b/wp-includes/Text/Diff/Renderer/inline.php @@ -0,0 +1,206 @@ +<?php +/** + * "Inline" diff renderer. + * + * Copyright 2004-2010 The Horde Project (http://www.horde.org/) + * + * See the enclosed file COPYING for license information (LGPL). If you did + * not receive this file, see https://opensource.org/license/lgpl-2-1/. + * + * @author Ciprian Popovici + * @package Text_Diff + */ + +/** Text_Diff_Renderer */ + +// WP #7391 +require_once dirname(dirname(__FILE__)) . '/Renderer.php'; + +/** + * "Inline" diff renderer. + * + * This class renders diffs in the Wiki-style "inline" format. + * + * @author Ciprian Popovici + * @package Text_Diff + */ +class Text_Diff_Renderer_inline extends Text_Diff_Renderer { + + /** + * Number of leading context "lines" to preserve. + * + * @var integer + */ + var $_leading_context_lines = 10000; + + /** + * Number of trailing context "lines" to preserve. + * + * @var integer + */ + var $_trailing_context_lines = 10000; + + /** + * Prefix for inserted text. + * + * @var string + */ + var $_ins_prefix = '<ins>'; + + /** + * Suffix for inserted text. + * + * @var string + */ + var $_ins_suffix = '</ins>'; + + /** + * Prefix for deleted text. + * + * @var string + */ + var $_del_prefix = '<del>'; + + /** + * Suffix for deleted text. + * + * @var string + */ + var $_del_suffix = '</del>'; + + /** + * Header for each change block. + * + * @var string + */ + var $_block_header = ''; + + /** + * Whether to split down to character-level. + * + * @var boolean + */ + var $_split_characters = false; + + /** + * What are we currently splitting on? Used to recurse to show word-level + * or character-level changes. + * + * @var string + */ + var $_split_level = 'lines'; + + function _blockHeader($xbeg, $xlen, $ybeg, $ylen) + { + return $this->_block_header; + } + + function _startBlock($header) + { + return $header; + } + + function _lines($lines, $prefix = ' ', $encode = true) + { + if ($encode) { + array_walk($lines, array(&$this, '_encode')); + } + + if ($this->_split_level == 'lines') { + return implode("\n", $lines) . "\n"; + } else { + return implode('', $lines); + } + } + + function _added($lines) + { + array_walk($lines, array(&$this, '_encode')); + $lines[0] = $this->_ins_prefix . $lines[0]; + $lines[count($lines) - 1] .= $this->_ins_suffix; + return $this->_lines($lines, ' ', false); + } + + function _deleted($lines, $words = false) + { + array_walk($lines, array(&$this, '_encode')); + $lines[0] = $this->_del_prefix . $lines[0]; + $lines[count($lines) - 1] .= $this->_del_suffix; + return $this->_lines($lines, ' ', false); + } + + function _changed($orig, $final) + { + /* If we've already split on characters, just display. */ + if ($this->_split_level == 'characters') { + return $this->_deleted($orig) + . $this->_added($final); + } + + /* If we've already split on words, just display. */ + if ($this->_split_level == 'words') { + $prefix = ''; + while ($orig[0] !== false && $final[0] !== false && + substr($orig[0], 0, 1) == ' ' && + substr($final[0], 0, 1) == ' ') { + $prefix .= substr($orig[0], 0, 1); + $orig[0] = substr($orig[0], 1); + $final[0] = substr($final[0], 1); + } + return $prefix . $this->_deleted($orig) . $this->_added($final); + } + + $text1 = implode("\n", $orig); + $text2 = implode("\n", $final); + + /* Non-printing newline marker. */ + $nl = "\0"; + + if ($this->_split_characters) { + $diff = new Text_Diff('native', + array(preg_split('//', $text1), + preg_split('//', $text2))); + } else { + /* We want to split on word boundaries, but we need to preserve + * whitespace as well. Therefore we split on words, but include + * all blocks of whitespace in the wordlist. */ + $diff = new Text_Diff('native', + array($this->_splitOnWords($text1, $nl), + $this->_splitOnWords($text2, $nl))); + } + + /* Get the diff in inline format. */ + $renderer = new Text_Diff_Renderer_inline + (array_merge($this->getParams(), + array('split_level' => $this->_split_characters ? 'characters' : 'words'))); + + /* Run the diff and get the output. */ + return str_replace($nl, "\n", $renderer->render($diff)) . "\n"; + } + + function _splitOnWords($string, $newlineEscape = "\n") + { + // Ignore \0; otherwise the while loop will never finish. + $string = str_replace("\0", '', $string); + + $words = array(); + $length = strlen($string); + $pos = 0; + + while ($pos < $length) { + // Eat a word with any preceding whitespace. + $spaces = strspn(substr($string, $pos), " \n"); + $nextpos = strcspn(substr($string, $pos + $spaces), " \n"); + $words[] = str_replace("\n", $newlineEscape, substr($string, $pos, $spaces + $nextpos)); + $pos += $spaces + $nextpos; + } + + return $words; + } + + function _encode(&$string) + { + $string = htmlspecialchars($string); + } + +} |