//
//  IQUIWindow+Hierarchy.swift
// https://github.com/hackiftekhar/IQKeyboardManager
// Copyright (c) 2013-15 Iftekhar Qurashi.
//
// 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 Foundation
import UIKit

/** @abstract UIWindow hierarchy category.  */
extension UIWindow {

    /** @return Returns the current Top Most ViewController in hierarchy.   */
    override func topMostController()->UIViewController? {
        
        var topController = rootViewController
        
        while let presentedController = topController?.presentedViewController {
            topController = presentedController
        }
        
        return topController
    }
    
    /** @return Returns the topViewController in stack of topMostController.    */
    func currentViewController()->UIViewController? {
        
        var currentViewController = topMostController()
        
        while currentViewController != nil && currentViewController is UINavigationController && (currentViewController as! UINavigationController).topViewController != nil {
            currentViewController = (currentViewController as! UINavigationController).topViewController
        }

        return currentViewController
    }
}
