Text_MappedDiff

271class Text_MappedDiff extends Text_Diff {272 273    /**274     * Computes a diff between sequences of strings.275     *276     * This can be used to compute things like case-insensitive diffs, or diffs277     * which ignore changes in white-space.278     *279     * @param array $from_lines         An array of strings.280     * @param array $to_lines           An array of strings.281     * @param array $mapped_from_lines  This array should have the same size282     *                                  number of elements as $from_lines.  The283     *                                  elements in $mapped_from_lines and284     *                                  $mapped_to_lines are what is actually285     *                                  compared when computing the diff.286     * @param array $mapped_to_lines    This array should have the same number287     *                                  of elements as $to_lines.288     */289    function __construct($from_lines, $to_lines,290                             $mapped_from_lines, $mapped_to_lines)291    {292        assert(count($from_lines) == count($mapped_from_lines));293        assert(count($to_lines) == count($mapped_to_lines));294 295        parent::Text_Diff($mapped_from_lines, $mapped_to_lines);296 297        $xi = $yi = 0;298        for ($i = 0; $i < count($this->_edits); $i++) {299            $orig = &$this->_edits[$i]->orig;300            if (is_array($orig)) {301                $orig = array_slice($from_lines, $xi, count($orig));302                $xi += count($orig);303            }304 305            $final = &$this->_edits[$i]->final;306            if (is_array($final)) {307                $final = array_slice($to_lines, $yi, count($final));308                $yi += count($final);309            }310        }311    }312 313	/**314	 * PHP4 constructor.315	 */316	public function Text_MappedDiff( $from_lines, $to_lines,317                             $mapped_from_lines, $mapped_to_lines ) {318		self::__construct( $from_lines, $to_lines,319                             $mapped_from_lines, $mapped_to_lines );320	}321 322}