ConstraintAttributes.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
internal struct ConstraintAttributes : OptionSet, ExpressibleByIntegerLiteral {
typealias IntegerLiteralType = UInt
internal init(rawValue: UInt) {
self.rawValue = rawValue
}
internal init(_ rawValue: UInt) {
self.init(rawValue: rawValue)
}
internal init(nilLiteral: ()) {
self.rawValue = 0
}
internal init(integerLiteral rawValue: IntegerLiteralType) {
self.init(rawValue: rawValue)
}
internal private(set) var rawValue: UInt
internal static var allZeros: ConstraintAttributes { return 0 }
internal static func convertFromNilLiteral() -> ConstraintAttributes { return 0 }
internal var boolValue: Bool { return self.rawValue != 0 }
internal func toRaw() -> UInt { return self.rawValue }
internal static func fromRaw(_ raw: UInt) -> ConstraintAttributes? { return self.init(raw) }
internal static func fromMask(_ raw: UInt) -> ConstraintAttributes { return self.init(raw) }
// normal
internal static var none: ConstraintAttributes { return 0 }
internal static var left: ConstraintAttributes { return 1 }
internal static var top: ConstraintAttributes { return 2 }
internal static var right: ConstraintAttributes { return 4 }
internal static var bottom: ConstraintAttributes { return 8 }
internal static var leading: ConstraintAttributes { return 16 }
internal static var trailing: ConstraintAttributes { return 32 }
internal static var width: ConstraintAttributes { return 64 }
internal static var height: ConstraintAttributes { return 128 }
internal static var centerX: ConstraintAttributes { return 256 }
internal static var centerY: ConstraintAttributes { return 512 }
internal static var lastBaseline: ConstraintAttributes { return 1024 }
@available(iOS 8.0, OSX 10.11, *)
internal static var firstBaseline: ConstraintAttributes { return 2048 }
@available(iOS 8.0, *)
internal static var leftMargin: ConstraintAttributes { return 4096 }
@available(iOS 8.0, *)
internal static var rightMargin: ConstraintAttributes { return 8192 }
@available(iOS 8.0, *)
internal static var topMargin: ConstraintAttributes { return 16384 }
@available(iOS 8.0, *)
internal static var bottomMargin: ConstraintAttributes { return 32768 }
@available(iOS 8.0, *)
internal static var leadingMargin: ConstraintAttributes { return 65536 }
@available(iOS 8.0, *)
internal static var trailingMargin: ConstraintAttributes { return 131072 }
@available(iOS 8.0, *)
internal static var centerXWithinMargins: ConstraintAttributes { return 262144 }
@available(iOS 8.0, *)
internal static var centerYWithinMargins: ConstraintAttributes { return 524288 }
// aggregates
internal static var edges: ConstraintAttributes { return 15 }
internal static var size: ConstraintAttributes { return 192 }
internal static var center: ConstraintAttributes { return 768 }
@available(iOS 8.0, *)
internal static var margins: ConstraintAttributes { return 61440 }
@available(iOS 8.0, *)
internal static var centerWithinMargins: ConstraintAttributes { return 786432 }
internal var layoutAttributes:[LayoutAttribute] {
var attrs = [LayoutAttribute]()
if (self.contains(ConstraintAttributes.left)) {
attrs.append(.left)
}
if (self.contains(ConstraintAttributes.top)) {
attrs.append(.top)
}
if (self.contains(ConstraintAttributes.right)) {
attrs.append(.right)
}
if (self.contains(ConstraintAttributes.bottom)) {
attrs.append(.bottom)
}
if (self.contains(ConstraintAttributes.leading)) {
attrs.append(.leading)
}
if (self.contains(ConstraintAttributes.trailing)) {
attrs.append(.trailing)
}
if (self.contains(ConstraintAttributes.width)) {
attrs.append(.width)
}
if (self.contains(ConstraintAttributes.height)) {
attrs.append(.height)
}
if (self.contains(ConstraintAttributes.centerX)) {
attrs.append(.centerX)
}
if (self.contains(ConstraintAttributes.centerY)) {
attrs.append(.centerY)
}
if (self.contains(ConstraintAttributes.lastBaseline)) {
attrs.append(.lastBaseline)
}
#if os(iOS) || os(tvOS)
if (self.contains(ConstraintAttributes.firstBaseline)) {
attrs.append(.firstBaseline)
}
if (self.contains(ConstraintAttributes.leftMargin)) {
attrs.append(.leftMargin)
}
if (self.contains(ConstraintAttributes.rightMargin)) {
attrs.append(.rightMargin)
}
if (self.contains(ConstraintAttributes.topMargin)) {
attrs.append(.topMargin)
}
if (self.contains(ConstraintAttributes.bottomMargin)) {
attrs.append(.bottomMargin)
}
if (self.contains(ConstraintAttributes.leadingMargin)) {
attrs.append(.leadingMargin)
}
if (self.contains(ConstraintAttributes.trailingMargin)) {
attrs.append(.trailingMargin)
}
if (self.contains(ConstraintAttributes.centerXWithinMargins)) {
attrs.append(.centerXWithinMargins)
}
if (self.contains(ConstraintAttributes.centerYWithinMargins)) {
attrs.append(.centerYWithinMargins)
}
#endif
return attrs
}
}
internal func + (left: ConstraintAttributes, right: ConstraintAttributes) -> ConstraintAttributes {
return left.union(right)
}
internal func +=(left: inout ConstraintAttributes, right: ConstraintAttributes) {
left.formUnion(right)
}
internal func -=(left: inout ConstraintAttributes, right: ConstraintAttributes) {
left.subtract(right)
}
internal func ==(left: ConstraintAttributes, right: ConstraintAttributes) -> Bool {
return left.rawValue == right.rawValue
}