You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
93 lines
2.9 KiB
93 lines
2.9 KiB
// |
|
// 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 protocol LayoutConstraintItem: class { |
|
} |
|
|
|
@available(iOS 9.0, OSX 10.11, *) |
|
extension ConstraintLayoutGuide : LayoutConstraintItem { |
|
} |
|
|
|
extension ConstraintView : LayoutConstraintItem { |
|
} |
|
|
|
|
|
extension LayoutConstraintItem { |
|
|
|
internal func prepare() { |
|
if let view = self as? ConstraintView { |
|
view.translatesAutoresizingMaskIntoConstraints = false |
|
} |
|
} |
|
|
|
internal var superview: ConstraintView? { |
|
if let view = self as? ConstraintView { |
|
return view.superview |
|
} |
|
|
|
if #available(iOS 9.0, OSX 10.11, *), let guide = self as? ConstraintLayoutGuide { |
|
return guide.owningView |
|
} |
|
|
|
return nil |
|
} |
|
internal var constraints: [Constraint] { |
|
return self.constraintsSet.allObjects as! [Constraint] |
|
} |
|
|
|
internal func add(constraints: [Constraint]) { |
|
let constraintsSet = self.constraintsSet |
|
for constraint in constraints { |
|
constraintsSet.add(constraint) |
|
} |
|
} |
|
|
|
internal func remove(constraints: [Constraint]) { |
|
let constraintsSet = self.constraintsSet |
|
for constraint in constraints { |
|
constraintsSet.remove(constraint) |
|
} |
|
} |
|
|
|
private var constraintsSet: NSMutableSet { |
|
let constraintsSet: NSMutableSet |
|
|
|
if let existing = objc_getAssociatedObject(self, &constraintsKey) as? NSMutableSet { |
|
constraintsSet = existing |
|
} else { |
|
constraintsSet = NSMutableSet() |
|
objc_setAssociatedObject(self, &constraintsKey, constraintsSet, .OBJC_ASSOCIATION_RETAIN_NONATOMIC) |
|
} |
|
return constraintsSet |
|
|
|
} |
|
|
|
} |
|
private var constraintsKey: UInt8 = 0
|
|
|