CGRect Convenience

CGRect+Convenience.swift

//
//  CGRect+Convenience.swift
//
//  Created by Dom Hofmann on 9/5/18.
//  Copyright © 2018 Dom Hofmann. All rights reserved.
//

import Foundation
import UIKit

extension CGRect {
    public var top: CGFloat {
        get {
            return origin.y
        }
        set(value) {
            origin.y = value
        }
    }
    
    public var bottom: CGFloat {
        get {
            return origin.y + size.height
        }
        set(value) {
            origin.y = value - size.height
        }
    }
    
    public var left: CGFloat {
        get {
            return origin.x
        }
        set(value) {
            origin.x = value
        }
    }
    
    public var right: CGFloat {
        get {
            return origin.x + size.width
        }
        set(value) {
            origin.x = value - size.width
        }
    }
    
    public mutating func stretchRight(_ newRight: CGFloat) {
        let currentRight = right
        let diff = newRight - currentRight
        size.width += diff
    }
    
    public mutating func stretchLeft(_ newLeft: CGFloat) {
        let currentLeft = left
        let diff = newLeft - currentLeft
        left = newLeft
        size.width -= diff
    }
    
    public mutating func stretchBottom(_ newBottom: CGFloat) {
        let currentBottom = bottom
        let diff = newBottom - currentBottom
        size.height += diff
    }
    
    public mutating func stretchTop(_ newTop: CGFloat) {
        let currentTop = top
        let diff = newTop - currentTop
        top = newTop
        size.height -= diff
    }
}