53 lines
2.0 KiB
PHP
53 lines
2.0 KiB
PHP
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<?php
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/**
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* Copyright 2007-2012 Horde LLC (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 http://www.horde.org/licenses/lgpl21.
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*
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* @package Text_Diff
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* @author Geoffrey T. Dairiki <dairiki@dairiki.org>
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*/
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class Horde_Text_Diff_Mapped extends Horde_Text_Diff
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{
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/**
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* Computes a diff between sequences of strings.
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*
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* This can be used to compute things like case-insensitve diffs, or diffs
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* which ignore changes in white-space.
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*
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* @param array $from_lines An array of strings.
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* @param array $to_lines An array of strings.
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* @param array $mapped_from_lines This array should have the same size
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* number of elements as $from_lines. The
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* elements in $mapped_from_lines and
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* $mapped_to_lines are what is actually
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* compared when computing the diff.
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* @param array $mapped_to_lines This array should have the same number
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* of elements as $to_lines.
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*/
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public function __construct($from_lines, $to_lines,
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$mapped_from_lines, $mapped_to_lines)
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{
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assert(count($from_lines) == count($mapped_from_lines));
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assert(count($to_lines) == count($mapped_to_lines));
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parent::__construct($mapped_from_lines, $mapped_to_lines);
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$xi = $yi = 0;
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for ($i = 0; $i < count($this->_edits); $i++) {
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$orig = &$this->_edits[$i]->orig;
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if (is_array($orig)) {
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$orig = array_slice($from_lines, $xi, count($orig));
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$xi += count($orig);
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}
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$final = &$this->_edits[$i]->final;
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if (is_array($final)) {
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$final = array_slice($to_lines, $yi, count($final));
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$yi += count($final);
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}
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}
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}
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}
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