<?php
/**
* Class used internally by Diff to actually compute the diffs.
*
* This class uses the xdiff PECL package (http://pecl.php.net/package/xdiff)
* to compute the differences between the two input arrays.
*
* 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 Jon Parise <jon@horde.org>
* @package Text_Diff
*/
class Text_Diff_Engine_xdiff {
/**
*/
function diff($from_lines, $to_lines)
{
array_walk($from_lines, array('Text_Diff', 'trimNewlines'));
array_walk($to_lines, array('Text_Diff', 'trimNewlines'));
/* Convert the two input arrays into strings for xdiff processing. */
$from_string = implode("\n", $from_lines);
$to_string = implode("\n", $to_lines);
/* Diff the two strings and convert the result to an array. */
$diff = xdiff_string_diff($from_string, $to_string, count($to_lines));
$diff = explode("\n", $diff);
/* Walk through the diff one line at a time. We build the $edits
* array of diff operations by reading the first character of the
* xdiff output (which is in the "unified diff" format).
*
* Note that we don't have enough information to detect "changed"
* lines using this approach, so we can't add Text_Diff_Op_changed
* instances to the $edits array. The result is still perfectly
* valid, albeit a little less descriptive and efficient. */
$edits = array();
foreach ($diff as $line) {
if (!strlen($line)) {
continue;
}
switch ($line[0]) {
case ' ':
$edits[] = new Text_Diff_Op_copy(array(substr($line, 1)));
break;
case '+':
$edits[] = new Text_Diff_Op_add(array(substr($line, 1)));
break;
case '-':
$edits[] = new Text_Diff_Op_delete(array(substr($line, 1)));
break;
}
}
return $edits;
}
}
في جولة حصرية داخل “الغرفة الزرقاء” بقناة BBC العربية، نكشف كواليس واحدة من أكثر غرف الأخبار تطورًا في العالم.
كيف الذكاء اصطناعي يتحكم بالبث دون تدخل بشري، لتقدم تجربة بصرية مذهلة.
الفيديو يستعرض كيف تمزج BBC بين التقنية والاحتراف لتصنع نشرات إخبارية من قلب المستقبل.