1f173de885
Pristine upstream, unpacked from the official wordpress.org tarball. https://wordpress.org/wordpress-7.1.1.tar.gz sha1 2a9d68474e8703aa3a66f80427b325e0941b6a1e (published by wordpress.org) sha256 3996fee13448ef12e07e9f0c77db2f655ffa1b7cde71c80a4965d3bf1fb956b3 This branch carries nothing but upstream releases, one commit each, and is never edited. It is the other side of the git-subtree merge that brings security releases into SiriusPress/wordpress/ — see SiriusPress/docs/upstream-merges.md.
64 lines
2.2 KiB
PHP
64 lines
2.2 KiB
PHP
<?php
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/**
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* Class used internally by Diff to actually compute the diffs.
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*
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* This class uses the xdiff PECL package (http://pecl.php.net/package/xdiff)
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* to compute the differences between the two input arrays.
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*
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* Copyright 2004-2010 The Horde Project (http://www.horde.org/)
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*
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* See the enclosed file COPYING for license information (LGPL). If you did
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* not receive this file, see https://opensource.org/license/lgpl-2-1/.
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*
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* @author Jon Parise <jon@horde.org>
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* @package Text_Diff
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*/
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class Text_Diff_Engine_xdiff {
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/**
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*/
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function diff($from_lines, $to_lines)
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{
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array_walk($from_lines, array('Text_Diff', 'trimNewlines'));
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array_walk($to_lines, array('Text_Diff', 'trimNewlines'));
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/* Convert the two input arrays into strings for xdiff processing. */
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$from_string = implode("\n", $from_lines);
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$to_string = implode("\n", $to_lines);
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/* Diff the two strings and convert the result to an array. */
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$diff = xdiff_string_diff($from_string, $to_string, count($to_lines));
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$diff = explode("\n", $diff);
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/* Walk through the diff one line at a time. We build the $edits
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* array of diff operations by reading the first character of the
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* xdiff output (which is in the "unified diff" format).
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*
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* Note that we don't have enough information to detect "changed"
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* lines using this approach, so we can't add Text_Diff_Op_changed
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* instances to the $edits array. The result is still perfectly
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* valid, albeit a little less descriptive and efficient. */
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$edits = array();
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foreach ($diff as $line) {
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if (!strlen($line)) {
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continue;
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}
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switch ($line[0]) {
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case ' ':
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$edits[] = new Text_Diff_Op_copy(array(substr($line, 1)));
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break;
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case '+':
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$edits[] = new Text_Diff_Op_add(array(substr($line, 1)));
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break;
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case '-':
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$edits[] = new Text_Diff_Op_delete(array(substr($line, 1)));
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break;
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}
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}
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return $edits;
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}
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}
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