//Copyright (c) 2019 pikachu987 <pikachu77769@gmail.com>
//
//Permission is hereby granted, free of charge, to any person obtaining a copy
//of this software and associated documentation files (the "Software"), to deal
//in the Software without restriction, including without limitation the rights
//to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
//copies of the Software, and to permit persons to whom the Software is
//furnished to do so, subject to the following conditions:
//
//The above copyright notice and this permission notice shall be included in
//all copies or substantial portions of the Software.
//
//THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
//IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
//AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
//LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
//OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
//THE SOFTWARE.

import UIKit

extension UITableView {
    private struct AssociatedKeys {
        static var reorder: UInt8 = 0
    }
    
    public var reorder: TableViewReorder {
        if let reorder = objc_getAssociatedObject(self, &AssociatedKeys.reorder) as? TableViewReorder {
            return reorder
        } else {
            let reorder = TableViewReorder(tableView: self)
            objc_setAssociatedObject(self, &AssociatedKeys.reorder, reorder, .OBJC_ASSOCIATION_RETAIN_NONATOMIC)
            return reorder
        }
    }
}
