108 lines
2.2 KiB
Swift
108 lines
2.2 KiB
Swift
//
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// QLUtils.swift
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// QuickLayout
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//
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// Created by Daniel Huri on 11/21/17.
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//
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import Foundation
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import UIKit
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/**
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Typealias for dictionary that contains multiple constraints
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*/
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public typealias QLMultipleConstraints = [QLAttribute: NSLayoutConstraint]
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/**
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Extends layout priority to other readable types
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*/
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public extension QLPriority {
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static let must = QLPriority(rawValue: 999)
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static let zero = QLPriority(rawValue: 0)
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}
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/**
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Represents pair of attributes
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*/
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public struct QLAttributePair {
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public let first: QLAttribute
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public let second: QLAttribute
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}
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/**
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Represents size constraints
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*/
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public struct QLSizeConstraints {
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public let width: NSLayoutConstraint
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public let height: NSLayoutConstraint
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}
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/**
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Represents center constraints
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*/
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public struct QLCenterConstraints {
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public let x: NSLayoutConstraint
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public let y: NSLayoutConstraint
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}
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/**
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Represents axis constraints (might be .top and .bottom, .left and .right, .leading and .trailing)
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*/
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public struct QLAxisConstraints {
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public let first: NSLayoutConstraint
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public let second: NSLayoutConstraint
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}
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/**
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Represents center and size constraints
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*/
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public struct QLFillConstraints {
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public let center: QLCenterConstraints
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public let size: QLSizeConstraints
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}
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/**
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Represents pair of priorities
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*/
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public struct QLPriorityPair {
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public let horizontal: QLPriority
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public let vertical: QLPriority
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public static var required: QLPriorityPair {
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return QLPriorityPair(.required, .required)
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}
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public static var must: QLPriorityPair {
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return QLPriorityPair(.must, .must)
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}
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public init(_ horizontal: QLPriority, _ vertical: QLPriority) {
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self.horizontal = horizontal
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self.vertical = vertical
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}
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}
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/**
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Represents axis description
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*/
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public enum QLAxis {
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case horizontally
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case vertically
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public var attributes: QLAttributePair {
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let first: QLAttribute
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let second: QLAttribute
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switch self {
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case .horizontally:
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first = .left
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second = .right
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case .vertically:
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first = .top
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second = .bottom
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}
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return QLAttributePair(first: first, second: second)
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}
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}
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