MessageKit/Sources/Extensions/NSAttributedString+Extensions.swift

// MIT License
//
// Copyright (c) 2017-2019 MessageKit
//
// 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

extension NSAttributedString {
  public func width(considering height: CGFloat) -> CGFloat {
    let size = size(consideringHeight: height)
    return size.width
  }

  public func height(considering width: CGFloat) -> CGFloat {
    let size = size(consideringWidth: width)
    return size.height
  }

  public func size(consideringHeight height: CGFloat) -> CGSize {
    let constraintBox = CGSize(width: .greatestFiniteMagnitude, height: height)
    return size(considering: constraintBox)
  }

  public func size(consideringWidth width: CGFloat) -> CGSize {
    let constraintBox = CGSize(width: width, height: .greatestFiniteMagnitude)
    return size(considering: constraintBox)
  }

  public func size(considering size: CGSize) -> CGSize {
    let rect = boundingRect(with: size, options: [.usesLineFragmentOrigin, .usesFontLeading], context: nil)
    return rect.size
  }
}