ConstraintPriority.swift
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//
// SnapKit
//
// Copyright (c) 2011-Present SnapKit Team - https://github.com/SnapKit
//
// 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.
#if os(iOS) || os(tvOS)
import UIKit
#else
import AppKit
#endif
public struct ConstraintPriority : ExpressibleByFloatLiteral, Equatable, Strideable {
public typealias FloatLiteralType = Float
public let value: Float
public init(floatLiteral value: Float) {
self.value = value
}
public init(_ value: Float) {
self.value = value
}
public static var required: ConstraintPriority {
return 1000.0
}
public static var high: ConstraintPriority {
return 750.0
}
public static var medium: ConstraintPriority {
#if os(OSX)
return 501.0
#else
return 500.0
#endif
}
public static var low: ConstraintPriority {
return 250.0
}
public static func ==(lhs: ConstraintPriority, rhs: ConstraintPriority) -> Bool {
return lhs.value == rhs.value
}
// MARK: Strideable
public func advanced(by n: FloatLiteralType) -> ConstraintPriority {
return ConstraintPriority(floatLiteral: value + n)
}
public func distance(to other: ConstraintPriority) -> FloatLiteralType {
return other.value - value
}
}