mirror of https://github.com/SnapKit/SnapKit
631 lines
29 KiB
Swift
631 lines
29 KiB
Swift
//
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// SnapKit
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//
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// Copyright (c) 2011-2015 SnapKit Team - https://github.com/SnapKit
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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#if os(iOS) || os(tvOS)
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import UIKit
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#else
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import AppKit
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#endif
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/**
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Used to expose the final API of a `ConstraintDescription` which allows getting a constraint from it
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*/
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public protocol ConstraintDescriptionFinalizable: class {
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var constraint: Constraint { get }
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func labeled(label: String) -> ConstraintDescriptionFinalizable
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}
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/**
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Used to expose priority APIs
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*/
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public protocol ConstraintDescriptionPriortizable: ConstraintDescriptionFinalizable {
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func priority(priority: Float) -> ConstraintDescriptionFinalizable
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func priority(priority: Double) -> ConstraintDescriptionFinalizable
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func priority(priority: CGFloat) -> ConstraintDescriptionFinalizable
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func priority(priority: UInt) -> ConstraintDescriptionFinalizable
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func priority(priority: Int) -> ConstraintDescriptionFinalizable
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func priorityRequired() -> ConstraintDescriptionFinalizable
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func priorityHigh() -> ConstraintDescriptionFinalizable
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func priorityMedium() -> ConstraintDescriptionFinalizable
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func priorityLow() -> ConstraintDescriptionFinalizable
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}
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/**
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Used to expose multiplier & constant APIs
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*/
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public protocol ConstraintDescriptionEditable: ConstraintDescriptionPriortizable {
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func multipliedBy(amount: Float) -> ConstraintDescriptionEditable
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func multipliedBy(amount: Double) -> ConstraintDescriptionEditable
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func multipliedBy(amount: CGFloat) -> ConstraintDescriptionEditable
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func multipliedBy(amount: Int) -> ConstraintDescriptionEditable
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func multipliedBy(amount: UInt) -> ConstraintDescriptionEditable
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func dividedBy(amount: Float) -> ConstraintDescriptionEditable
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func dividedBy(amount: Double) -> ConstraintDescriptionEditable
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func dividedBy(amount: CGFloat) -> ConstraintDescriptionEditable
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func dividedBy(amount: Int) -> ConstraintDescriptionEditable
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func dividedBy(amount: UInt) -> ConstraintDescriptionEditable
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func offset(amount: Float) -> ConstraintDescriptionEditable
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func offset(amount: Double) -> ConstraintDescriptionEditable
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func offset(amount: CGFloat) -> ConstraintDescriptionEditable
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func offset(amount: Int) -> ConstraintDescriptionEditable
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func offset(amount: UInt) -> ConstraintDescriptionEditable
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func offset(amount: CGPoint) -> ConstraintDescriptionEditable
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func offset(amount: CGSize) -> ConstraintDescriptionEditable
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func offset(amount: EdgeInsets) -> ConstraintDescriptionEditable
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func inset(amount: Float) -> ConstraintDescriptionEditable
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func inset(amount: Double) -> ConstraintDescriptionEditable
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func inset(amount: CGFloat) -> ConstraintDescriptionEditable
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func inset(amount: Int) -> ConstraintDescriptionEditable
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func inset(amount: UInt) -> ConstraintDescriptionEditable
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func inset(amount: EdgeInsets) -> ConstraintDescriptionEditable
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}
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/**
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Used to expose relation APIs
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*/
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public protocol ConstraintDescriptionRelatable: class {
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func equalTo(other: ConstraintItem) -> ConstraintDescriptionEditable
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func equalTo(other: View) -> ConstraintDescriptionEditable
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func equalToSuperview() -> ConstraintDescriptionEditable
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@available(iOS 7.0, *)
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func equalTo(other: LayoutSupport) -> ConstraintDescriptionEditable
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@available(iOS 9.0, OSX 10.11, *)
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func equalTo(other: NSLayoutAnchor) -> ConstraintDescriptionEditable
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func equalTo(other: Float) -> ConstraintDescriptionEditable
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func equalTo(other: Double) -> ConstraintDescriptionEditable
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func equalTo(other: CGFloat) -> ConstraintDescriptionEditable
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func equalTo(other: Int) -> ConstraintDescriptionEditable
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func equalTo(other: UInt) -> ConstraintDescriptionEditable
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func equalTo(other: CGSize) -> ConstraintDescriptionEditable
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func equalTo(other: CGPoint) -> ConstraintDescriptionEditable
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func equalTo(other: EdgeInsets) -> ConstraintDescriptionEditable
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func lessThanOrEqualTo(other: ConstraintItem) -> ConstraintDescriptionEditable
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func lessThanOrEqualTo(other: View) -> ConstraintDescriptionEditable
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func lessThanOrEqualToSuperview() -> ConstraintDescriptionEditable
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@available(iOS 7.0, *)
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func lessThanOrEqualTo(other: LayoutSupport) -> ConstraintDescriptionEditable
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@available(iOS 9.0, OSX 10.11, *)
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func lessThanOrEqualTo(other: NSLayoutAnchor) -> ConstraintDescriptionEditable
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func lessThanOrEqualTo(other: Float) -> ConstraintDescriptionEditable
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func lessThanOrEqualTo(other: Double) -> ConstraintDescriptionEditable
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func lessThanOrEqualTo(other: CGFloat) -> ConstraintDescriptionEditable
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func lessThanOrEqualTo(other: Int) -> ConstraintDescriptionEditable
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func lessThanOrEqualTo(other: UInt) -> ConstraintDescriptionEditable
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func lessThanOrEqualTo(other: CGSize) -> ConstraintDescriptionEditable
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func lessThanOrEqualTo(other: CGPoint) -> ConstraintDescriptionEditable
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func lessThanOrEqualTo(other: EdgeInsets) -> ConstraintDescriptionEditable
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func greaterThanOrEqualTo(other: ConstraintItem) -> ConstraintDescriptionEditable
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func greaterThanOrEqualTo(other: View) -> ConstraintDescriptionEditable
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func greaterThanOrEqualToSuperview() -> ConstraintDescriptionEditable
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@available(iOS 7.0, *)
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func greaterThanOrEqualTo(other: LayoutSupport) -> ConstraintDescriptionEditable
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@available(iOS 9.0, OSX 10.11, *)
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func greaterThanOrEqualTo(other: NSLayoutAnchor) -> ConstraintDescriptionEditable
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func greaterThanOrEqualTo(other: Float) -> ConstraintDescriptionEditable
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func greaterThanOrEqualTo(other: Double) -> ConstraintDescriptionEditable
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func greaterThanOrEqualTo(other: CGFloat) -> ConstraintDescriptionEditable
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func greaterThanOrEqualTo(other: Int) -> ConstraintDescriptionEditable
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func greaterThanOrEqualTo(other: UInt) -> ConstraintDescriptionEditable
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func greaterThanOrEqualTo(other: CGSize) -> ConstraintDescriptionEditable
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func greaterThanOrEqualTo(other: CGPoint) -> ConstraintDescriptionEditable
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func greaterThanOrEqualTo(other: EdgeInsets) -> ConstraintDescriptionEditable
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}
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/**
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Used to expose chaining APIs
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*/
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public protocol ConstraintDescriptionExtendable: ConstraintDescriptionRelatable {
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var left: ConstraintDescriptionExtendable { get }
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var top: ConstraintDescriptionExtendable { get }
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var bottom: ConstraintDescriptionExtendable { get }
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var right: ConstraintDescriptionExtendable { get }
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var leading: ConstraintDescriptionExtendable { get }
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var trailing: ConstraintDescriptionExtendable { get }
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var width: ConstraintDescriptionExtendable { get }
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var height: ConstraintDescriptionExtendable { get }
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var centerX: ConstraintDescriptionExtendable { get }
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var centerY: ConstraintDescriptionExtendable { get }
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var baseline: ConstraintDescriptionExtendable { get }
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@available(iOS 8.0, *)
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var firstBaseline: ConstraintDescriptionExtendable { get }
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@available(iOS 8.0, *)
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var leftMargin: ConstraintDescriptionExtendable { get }
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@available(iOS 8.0, *)
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var rightMargin: ConstraintDescriptionExtendable { get }
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@available(iOS 8.0, *)
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var topMargin: ConstraintDescriptionExtendable { get }
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@available(iOS 8.0, *)
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var bottomMargin: ConstraintDescriptionExtendable { get }
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@available(iOS 8.0, *)
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var leadingMargin: ConstraintDescriptionExtendable { get }
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@available(iOS 8.0, *)
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var trailingMargin: ConstraintDescriptionExtendable { get }
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@available(iOS 8.0, *)
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var centerXWithinMargins: ConstraintDescriptionExtendable { get }
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@available(iOS 8.0, *)
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var centerYWithinMargins: ConstraintDescriptionExtendable { get }
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}
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/**
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Used to internally manage building constraint
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*/
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internal class ConstraintDescription: ConstraintDescriptionExtendable, ConstraintDescriptionEditable, ConstraintDescriptionFinalizable {
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internal var left: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.Left) }
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internal var top: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.Top) }
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internal var right: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.Right) }
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internal var bottom: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.Bottom) }
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internal var leading: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.Leading) }
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internal var trailing: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.Trailing) }
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internal var width: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.Width) }
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internal var height: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.Height) }
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internal var centerX: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.CenterX) }
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internal var centerY: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.CenterY) }
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internal var baseline: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.Baseline) }
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internal var label: String?
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@available(iOS 8.0, *)
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internal var firstBaseline: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.FirstBaseline) }
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@available(iOS 8.0, *)
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internal var leftMargin: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.LeftMargin) }
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@available(iOS 8.0, *)
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internal var rightMargin: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.RightMargin) }
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@available(iOS 8.0, *)
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internal var topMargin: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.TopMargin) }
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@available(iOS 8.0, *)
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internal var bottomMargin: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.BottomMargin) }
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@available(iOS 8.0, *)
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internal var leadingMargin: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.LeadingMargin) }
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@available(iOS 8.0, *)
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internal var trailingMargin: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.TrailingMargin) }
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@available(iOS 8.0, *)
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internal var centerXWithinMargins: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.CenterXWithinMargins) }
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@available(iOS 8.0, *)
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internal var centerYWithinMargins: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.CenterYWithinMargins) }
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// MARK: initializer
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init(fromItem: ConstraintItem) {
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self.fromItem = fromItem
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self.toItem = ConstraintItem(object: nil, attributes: ConstraintAttributes.None)
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}
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// MARK: equalTo
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internal func equalTo(other: ConstraintItem) -> ConstraintDescriptionEditable {
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return self.constrainTo(other, relation: .Equal)
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}
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internal func equalTo(other: View) -> ConstraintDescriptionEditable {
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return self.constrainTo(other, relation: .Equal)
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}
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internal func equalToSuperview() -> ConstraintDescriptionEditable {
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guard let superview = fromItem.view?.superview else {
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fatalError("equalToSuperview() requires the view have a superview before being set.")
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}
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return self.equalTo(superview)
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}
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@available(iOS 7.0, *)
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internal func equalTo(other: LayoutSupport) -> ConstraintDescriptionEditable {
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return self.constrainTo(other, relation: .Equal)
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}
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@available(iOS 9.0, OSX 10.11, *)
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internal func equalTo(other: NSLayoutAnchor) -> ConstraintDescriptionEditable {
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return self.constrainTo(other, relation: .Equal)
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}
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internal func equalTo(other: Float) -> ConstraintDescriptionEditable {
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return self.constrainTo(other, relation: .Equal)
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}
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internal func equalTo(other: Double) -> ConstraintDescriptionEditable {
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return self.constrainTo(Float(other), relation: .Equal)
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}
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internal func equalTo(other: CGFloat) -> ConstraintDescriptionEditable {
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return self.constrainTo(Float(other), relation: .Equal)
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}
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internal func equalTo(other: Int) -> ConstraintDescriptionEditable {
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return self.constrainTo(Float(other), relation: .Equal)
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}
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internal func equalTo(other: UInt) -> ConstraintDescriptionEditable {
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return self.constrainTo(Float(other), relation: .Equal)
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}
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internal func equalTo(other: CGSize) -> ConstraintDescriptionEditable {
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return self.constrainTo(other, relation: .Equal)
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}
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internal func equalTo(other: CGPoint) -> ConstraintDescriptionEditable {
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return self.constrainTo(other, relation: .Equal)
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}
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internal func equalTo(other: EdgeInsets) -> ConstraintDescriptionEditable {
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return self.constrainTo(other, relation: .Equal)
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}
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// MARK: lessThanOrEqualTo
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internal func lessThanOrEqualTo(other: ConstraintItem) -> ConstraintDescriptionEditable {
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return self.constrainTo(other, relation: .LessThanOrEqualTo)
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}
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internal func lessThanOrEqualTo(other: View) -> ConstraintDescriptionEditable {
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return self.constrainTo(other, relation: .LessThanOrEqualTo)
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}
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internal func lessThanOrEqualToSuperview() -> ConstraintDescriptionEditable {
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guard let superview = fromItem.view?.superview else {
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fatalError("lessThanOrEqualToSuperview() requires the view have a superview before being set.")
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}
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return self.lessThanOrEqualTo(superview)
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}
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@available(iOS 7.0, *)
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internal func lessThanOrEqualTo(other: LayoutSupport) -> ConstraintDescriptionEditable {
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return self.constrainTo(other, relation: .LessThanOrEqualTo)
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}
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@available(iOS 9.0, OSX 10.11, *)
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internal func lessThanOrEqualTo(other: NSLayoutAnchor) -> ConstraintDescriptionEditable {
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return self.constrainTo(other, relation: .LessThanOrEqualTo)
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}
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internal func lessThanOrEqualTo(other: Float) -> ConstraintDescriptionEditable {
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return self.constrainTo(other, relation: .LessThanOrEqualTo)
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}
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internal func lessThanOrEqualTo(other: Double) -> ConstraintDescriptionEditable {
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return self.constrainTo(Float(other), relation: .LessThanOrEqualTo)
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}
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internal func lessThanOrEqualTo(other: CGFloat) -> ConstraintDescriptionEditable {
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return self.constrainTo(Float(other), relation: .LessThanOrEqualTo)
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}
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internal func lessThanOrEqualTo(other: Int) -> ConstraintDescriptionEditable {
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return self.constrainTo(Float(other), relation: .LessThanOrEqualTo)
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}
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internal func lessThanOrEqualTo(other: UInt) -> ConstraintDescriptionEditable {
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return self.constrainTo(Float(other), relation: .LessThanOrEqualTo)
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}
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internal func lessThanOrEqualTo(other: CGSize) -> ConstraintDescriptionEditable {
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return self.constrainTo(other, relation: .LessThanOrEqualTo)
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}
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internal func lessThanOrEqualTo(other: CGPoint) -> ConstraintDescriptionEditable {
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return self.constrainTo(other, relation: .LessThanOrEqualTo)
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}
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internal func lessThanOrEqualTo(other: EdgeInsets) -> ConstraintDescriptionEditable {
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return self.constrainTo(other, relation: .LessThanOrEqualTo)
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}
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// MARK: greaterThanOrEqualTo
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internal func greaterThanOrEqualTo(other: ConstraintItem) -> ConstraintDescriptionEditable {
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return self.constrainTo(other, relation: .GreaterThanOrEqualTo)
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}
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internal func greaterThanOrEqualTo(other: View) -> ConstraintDescriptionEditable {
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return self.constrainTo(other, relation: .GreaterThanOrEqualTo)
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}
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internal func greaterThanOrEqualToSuperview() -> ConstraintDescriptionEditable {
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guard let superview = fromItem.view?.superview else {
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fatalError("greaterThanOrEqualToSuperview() requires the view have a superview before being set.")
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}
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return self.greaterThanOrEqualTo(superview)
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}
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@available(iOS 7.0, *)
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internal func greaterThanOrEqualTo(other: LayoutSupport) -> ConstraintDescriptionEditable {
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return self.constrainTo(other, relation: .GreaterThanOrEqualTo)
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}
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@available(iOS 9.0, OSX 10.11, *)
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internal func greaterThanOrEqualTo(other: NSLayoutAnchor) -> ConstraintDescriptionEditable {
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return self.constrainTo(other, relation: .LessThanOrEqualTo)
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}
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internal func greaterThanOrEqualTo(other: Float) -> ConstraintDescriptionEditable {
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return self.constrainTo(other, relation: .GreaterThanOrEqualTo)
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}
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internal func greaterThanOrEqualTo(other: Double) -> ConstraintDescriptionEditable {
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return self.constrainTo(Float(other), relation: .GreaterThanOrEqualTo)
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}
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internal func greaterThanOrEqualTo(other: CGFloat) -> ConstraintDescriptionEditable {
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return self.constrainTo(Float(other), relation: .GreaterThanOrEqualTo)
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}
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internal func greaterThanOrEqualTo(other: Int) -> ConstraintDescriptionEditable {
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return self.constrainTo(Float(other), relation: .GreaterThanOrEqualTo)
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}
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internal func greaterThanOrEqualTo(other: UInt) -> ConstraintDescriptionEditable {
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return self.constrainTo(Float(other), relation: .GreaterThanOrEqualTo)
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}
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internal func greaterThanOrEqualTo(other: CGSize) -> ConstraintDescriptionEditable {
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return self.constrainTo(other, relation: .GreaterThanOrEqualTo)
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}
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internal func greaterThanOrEqualTo(other: CGPoint) -> ConstraintDescriptionEditable {
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return self.constrainTo(other, relation: .GreaterThanOrEqualTo)
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}
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internal func greaterThanOrEqualTo(other: EdgeInsets) -> ConstraintDescriptionEditable {
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return self.constrainTo(other, relation: .GreaterThanOrEqualTo)
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}
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// MARK: multiplier
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internal func multipliedBy(amount: Float) -> ConstraintDescriptionEditable {
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self.multiplier = amount
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return self
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}
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internal func multipliedBy(amount: Double) -> ConstraintDescriptionEditable {
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return self.multipliedBy(Float(amount))
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}
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internal func multipliedBy(amount: CGFloat) -> ConstraintDescriptionEditable {
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return self.multipliedBy(Float(amount))
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}
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internal func multipliedBy(amount: Int) -> ConstraintDescriptionEditable {
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return self.multipliedBy(Float(amount))
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}
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internal func multipliedBy(amount: UInt) -> ConstraintDescriptionEditable {
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return self.multipliedBy(Float(amount))
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}
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internal func dividedBy(amount: Float) -> ConstraintDescriptionEditable {
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self.multiplier = 1.0 / amount;
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return self
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}
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internal func dividedBy(amount: Double) -> ConstraintDescriptionEditable {
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return self.dividedBy(Float(amount))
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}
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internal func dividedBy(amount: CGFloat) -> ConstraintDescriptionEditable {
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return self.dividedBy(Float(amount))
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}
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internal func dividedBy(amount: Int) -> ConstraintDescriptionEditable {
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return self.dividedBy(Float(amount))
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}
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internal func dividedBy(amount: UInt) -> ConstraintDescriptionEditable {
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return self.dividedBy(Float(amount))
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}
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// MARK: offset
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internal func offset(amount: Float) -> ConstraintDescriptionEditable {
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self.constant = amount
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return self
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}
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internal func offset(amount: Double) -> ConstraintDescriptionEditable {
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return self.offset(Float(amount))
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}
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internal func offset(amount: CGFloat) -> ConstraintDescriptionEditable {
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return self.offset(Float(amount))
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}
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internal func offset(amount: Int) -> ConstraintDescriptionEditable {
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return self.offset(Float(amount))
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}
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internal func offset(amount: UInt) -> ConstraintDescriptionEditable {
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return self.offset(Float(amount))
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}
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internal func offset(amount: CGPoint) -> ConstraintDescriptionEditable {
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self.constant = amount
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return self
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}
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internal func offset(amount: CGSize) -> ConstraintDescriptionEditable {
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self.constant = amount
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return self
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}
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internal func offset(amount: EdgeInsets) -> ConstraintDescriptionEditable {
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self.constant = amount
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return self
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|
}
|
|
|
|
// MARK: inset
|
|
|
|
internal func inset(amount: Float) -> ConstraintDescriptionEditable {
|
|
let value = CGFloat(amount)
|
|
self.constant = EdgeInsets(top: value, left: value, bottom: -value, right: -value)
|
|
return self
|
|
}
|
|
internal func inset(amount: Double) -> ConstraintDescriptionEditable {
|
|
let value = CGFloat(amount)
|
|
self.constant = EdgeInsets(top: value, left: value, bottom: -value, right: -value)
|
|
return self
|
|
}
|
|
internal func inset(amount: CGFloat) -> ConstraintDescriptionEditable {
|
|
self.constant = EdgeInsets(top: amount, left: amount, bottom: -amount, right: -amount)
|
|
return self
|
|
}
|
|
internal func inset(amount: Int) -> ConstraintDescriptionEditable {
|
|
let value = CGFloat(amount)
|
|
self.constant = EdgeInsets(top: value, left: value, bottom: -value, right: -value)
|
|
return self
|
|
}
|
|
internal func inset(amount: UInt) -> ConstraintDescriptionEditable {
|
|
let value = CGFloat(amount)
|
|
self.constant = EdgeInsets(top: value, left: value, bottom: -value, right: -value)
|
|
return self
|
|
}
|
|
internal func inset(amount: EdgeInsets) -> ConstraintDescriptionEditable {
|
|
self.constant = EdgeInsets(top: amount.top, left: amount.left, bottom: -amount.bottom, right: -amount.right)
|
|
return self
|
|
}
|
|
|
|
// MARK: priority
|
|
|
|
internal func priority(priority: Float) -> ConstraintDescriptionFinalizable {
|
|
self.priority = priority
|
|
return self
|
|
}
|
|
internal func priority(priority: Double) -> ConstraintDescriptionFinalizable {
|
|
return self.priority(Float(priority))
|
|
}
|
|
internal func priority(priority: CGFloat) -> ConstraintDescriptionFinalizable {
|
|
return self.priority(Float(priority))
|
|
}
|
|
func priority(priority: UInt) -> ConstraintDescriptionFinalizable {
|
|
return self.priority(Float(priority))
|
|
}
|
|
internal func priority(priority: Int) -> ConstraintDescriptionFinalizable {
|
|
return self.priority(Float(priority))
|
|
}
|
|
internal func priorityRequired() -> ConstraintDescriptionFinalizable {
|
|
return self.priority(1000.0)
|
|
}
|
|
internal func priorityHigh() -> ConstraintDescriptionFinalizable {
|
|
return self.priority(750.0)
|
|
}
|
|
internal func priorityMedium() -> ConstraintDescriptionFinalizable {
|
|
#if os(iOS) || os(tvOS)
|
|
return self.priority(500.0)
|
|
#else
|
|
return self.priority(501.0)
|
|
#endif
|
|
}
|
|
internal func priorityLow() -> ConstraintDescriptionFinalizable {
|
|
return self.priority(250.0)
|
|
}
|
|
|
|
// MARK: Constraint
|
|
|
|
internal var constraint: Constraint {
|
|
if self.concreteConstraint == nil {
|
|
if self.relation == nil {
|
|
fatalError("Attempting to create a constraint from a ConstraintDescription before it has been fully chained.")
|
|
}
|
|
self.concreteConstraint = ConcreteConstraint(
|
|
fromItem: self.fromItem,
|
|
toItem: self.toItem,
|
|
relation: self.relation!,
|
|
constant: self.constant,
|
|
multiplier: self.multiplier,
|
|
priority: self.priority,
|
|
label: self.label)
|
|
}
|
|
return self.concreteConstraint!
|
|
}
|
|
|
|
func labeled(label: String) -> ConstraintDescriptionFinalizable {
|
|
self.label = label
|
|
return self
|
|
}
|
|
|
|
// MARK: Private
|
|
|
|
private let fromItem: ConstraintItem
|
|
private var toItem: ConstraintItem {
|
|
willSet {
|
|
if self.concreteConstraint != nil {
|
|
fatalError("Attempting to modify a ConstraintDescription after its constraint has been created.")
|
|
}
|
|
}
|
|
}
|
|
private var relation: ConstraintRelation? {
|
|
willSet {
|
|
if self.concreteConstraint != nil {
|
|
fatalError("Attempting to modify a ConstraintDescription after its constraint has been created.")
|
|
}
|
|
}
|
|
}
|
|
private var constant: Any = Float(0.0) {
|
|
willSet {
|
|
if self.concreteConstraint != nil {
|
|
fatalError("Attempting to modify a ConstraintDescription after its constraint has been created.")
|
|
}
|
|
}
|
|
}
|
|
private var multiplier: Float = 1.0 {
|
|
willSet {
|
|
if self.concreteConstraint != nil {
|
|
fatalError("Attempting to modify a ConstraintDescription after its constraint has been created.")
|
|
}
|
|
}
|
|
}
|
|
private var priority: Float = 1000.0 {
|
|
willSet {
|
|
if self.concreteConstraint != nil {
|
|
fatalError("Attempting to modify a ConstraintDescription after its constraint has been created.")
|
|
}
|
|
}
|
|
}
|
|
private var concreteConstraint: ConcreteConstraint? = nil
|
|
|
|
private func addConstraint(attributes: ConstraintAttributes) -> ConstraintDescription {
|
|
if self.relation == nil {
|
|
self.fromItem.attributes += attributes
|
|
}
|
|
return self
|
|
}
|
|
|
|
private func constrainTo(other: ConstraintItem, relation: ConstraintRelation) -> ConstraintDescription {
|
|
if other.attributes != ConstraintAttributes.None {
|
|
let toLayoutAttributes = other.attributes.layoutAttributes
|
|
if toLayoutAttributes.count > 1 {
|
|
let fromLayoutAttributes = self.fromItem.attributes.layoutAttributes
|
|
if toLayoutAttributes != fromLayoutAttributes {
|
|
NSException(name: "Invalid Constraint", reason: "Cannot constrain to multiple non identical attributes", userInfo: nil).raise()
|
|
return self
|
|
}
|
|
other.attributes = ConstraintAttributes.None
|
|
}
|
|
}
|
|
self.toItem = other
|
|
self.relation = relation
|
|
return self
|
|
}
|
|
|
|
private func constrainTo(other: View, relation: ConstraintRelation) -> ConstraintDescription {
|
|
return constrainTo(ConstraintItem(object: other, attributes: ConstraintAttributes.None), relation: relation)
|
|
}
|
|
|
|
@available(iOS 7.0, *)
|
|
private func constrainTo(other: LayoutSupport, relation: ConstraintRelation) -> ConstraintDescription {
|
|
return constrainTo(ConstraintItem(object: other, attributes: ConstraintAttributes.None), relation: relation)
|
|
}
|
|
|
|
@available(iOS 9.0, OSX 10.11, *)
|
|
private func constrainTo(other: NSLayoutAnchor, relation: ConstraintRelation) -> ConstraintDescription {
|
|
return constrainTo(ConstraintItem(object: other, attributes: ConstraintAttributes.None), relation: relation)
|
|
}
|
|
|
|
private func constrainTo(other: Float, relation: ConstraintRelation) -> ConstraintDescription {
|
|
self.constant = other
|
|
return constrainTo(ConstraintItem(object: nil, attributes: ConstraintAttributes.None), relation: relation)
|
|
}
|
|
|
|
private func constrainTo(other: Double, relation: ConstraintRelation) -> ConstraintDescription {
|
|
self.constant = other
|
|
return constrainTo(ConstraintItem(object: nil, attributes: ConstraintAttributes.None), relation: relation)
|
|
}
|
|
|
|
private func constrainTo(other: CGSize, relation: ConstraintRelation) -> ConstraintDescription {
|
|
self.constant = other
|
|
return constrainTo(ConstraintItem(object: nil, attributes: ConstraintAttributes.None), relation: relation)
|
|
}
|
|
|
|
private func constrainTo(other: CGPoint, relation: ConstraintRelation) -> ConstraintDescription {
|
|
self.constant = other
|
|
return constrainTo(ConstraintItem(object: nil, attributes: ConstraintAttributes.None), relation: relation)
|
|
}
|
|
|
|
private func constrainTo(other: EdgeInsets, relation: ConstraintRelation) -> ConstraintDescription {
|
|
self.constant = other
|
|
return constrainTo(ConstraintItem(object: nil, attributes: ConstraintAttributes.None), relation: relation)
|
|
}
|
|
}
|