mirror of https://github.com/SnapKit/SnapKit
70 lines
2.6 KiB
Swift
70 lines
2.6 KiB
Swift
//
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// SnapKit
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//
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// Copyright (c) 2011-Present 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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public class ConstraintDescription {
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internal let item: LayoutConstraintItem
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internal var attributes: ConstraintAttributes
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internal var relation: ConstraintRelation? = nil
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internal var sourceLocation: (String, UInt)? = nil
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internal var label: String? = nil
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internal var related: ConstraintItem? = nil
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internal var multiplier: ConstraintMultiplierTarget = 1.0
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internal var constant: ConstraintConstantTarget = 0.0
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internal var priority: ConstraintPriorityTarget = 1000.0
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internal lazy var constraint: Constraint? = {
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guard let relation = self.relation,
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let related = self.related,
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let sourceLocation = self.sourceLocation else {
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return nil
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}
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let from = ConstraintItem(target: self.item as AnyObject, attributes: self.attributes)
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return Constraint(
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from: from,
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to: related,
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relation: relation,
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sourceLocation: sourceLocation,
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label: self.label,
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multiplier: self.multiplier,
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constant: self.constant,
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priority: self.priority
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)
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}()
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// MARK: Initialization
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internal init(item: LayoutConstraintItem, attributes: ConstraintAttributes) {
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self.item = item
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self.attributes = attributes
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}
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}
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