SnapKit/Source/LayoutConstraint.swift

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//
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// Snap
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//
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// Copyright (c) 2011-2015 Masonry Team - https://github.com/Masonry
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//
// 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)
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import UIKit
#else
import AppKit
#endif
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/**
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* LayoutConstraint is a subclass of NSLayoutConstraint to assist Snap and also provide better debugging
*/
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final public class LayoutConstraint: NSLayoutConstraint {
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internal var snp_constraint: ConstraintBuilder? = nil
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}
public func ==(left: LayoutConstraint, right: LayoutConstraint) -> Bool {
if left.firstItem !== right.firstItem {
return false
}
if left.secondItem !== right.secondItem {
return false
}
if left.firstAttribute != right.firstAttribute {
return false
}
if left.secondAttribute != right.secondAttribute {
return false
}
if left.relation != right.relation {
return false
}
if left.priority != right.priority {
return false
}
if left.multiplier != right.multiplier {
return false
}
return true
}