DiffOp.php

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<?php
abstract class DiffOp {
 
    public $type;
 
    public $orig;
 
    public $closing;
 
    public function getType() {
        return $this->type;
    }
 
    public function getOrig() {
        return $this->orig;
    }
 
    public function getClosing( $i = null ) {
        if ( $i === null ) {
            return $this->closing;
        }
        if ( array_key_exists( $i, $this->closing ) ) {
            return $this->closing[$i];
        }
        return null;
    }
 
    abstract public function reverse();
 
    public function norig() {
        return $this->orig ? count( $this->orig ) : 0;
    }
 
    public function nclosing() {
        return $this->closing ? count( $this->closing ) : 0;
    }
}