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//
// 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 ConstraintConstantTarget {
}
extension CGPoint: ConstraintConstantTarget {
}
extension CGSize: ConstraintConstantTarget {
}
extension ConstraintInsets: ConstraintConstantTarget {
}
extension ConstraintConstantTarget {
internal func constraintConstantTargetValueFor(layoutAttribute: LayoutAttribute) -> CGFloat {
if let value = self as? CGFloat {
return value
}
if let value = self as? Float {
return CGFloat(value)
}
if let value = self as? Double {
return CGFloat(value)
}
if let value = self as? Int {
return CGFloat(value)
}
if let value = self as? UInt {
return CGFloat(value)
}
if let value = self as? CGSize {
if layoutAttribute == .width {
return value.width
} else if layoutAttribute == .height {
return value.height
} else {
return 0.0
}
}
if let value = self as? CGPoint {
#if os(iOS) || os(tvOS)
switch layoutAttribute {
case .left, .right, .leading, .trailing, .centerX, .leftMargin, .rightMargin, .leadingMargin, .trailingMargin, .centerXWithinMargins:
return value.x
case .top, .bottom, .centerY, .topMargin, .bottomMargin, .centerYWithinMargins, .lastBaseline, .firstBaseline:
return value.y
case .width, .height, .notAnAttribute:
return 0.0
}
#else
switch layoutAttribute {
case .left, .right, .leading, .trailing, .centerX:
return value.x
case .top, .bottom, .centerY, .lastBaseline, .firstBaseline:
return value.y
case .width, .height, .notAnAttribute:
return 0.0
}
#endif
}
if let value = self as? ConstraintInsets {
#if os(iOS) || os(tvOS)
switch layoutAttribute {
case .left, .leftMargin, .centerX, .centerXWithinMargins:
return value.left
case .top, .topMargin, .centerY, .centerYWithinMargins, .lastBaseline, .firstBaseline:
return value.top
case .right, .rightMargin:
return -value.right
case .bottom, .bottomMargin:
return -value.bottom
case .leading, .leadingMargin:
return (ConstraintConfig.interfaceLayoutDirection == .leftToRight) ? value.left : value.right
case .trailing, .trailingMargin:
return (ConstraintConfig.interfaceLayoutDirection == .leftToRight) ? -value.right : -value.left
case .width:
return -(value.left + value.right)
case .height:
return -(value.top + value.bottom)
case .notAnAttribute:
return 0.0
}
#else
switch layoutAttribute {
case .left, .centerX:
return value.left
case .top, .centerY, .lastBaseline, .firstBaseline:
return value.top
case .right:
return -value.right
case .bottom:
return -value.bottom
case .leading:
return (ConstraintConfig.interfaceLayoutDirection == .leftToRight) ? value.left : value.right
case .trailing:
return (ConstraintConfig.interfaceLayoutDirection == .leftToRight) ? -value.right : -value.left
case .width:
return -(value.left + value.right)
case .height:
return -(value.top + value.bottom)
case .notAnAttribute:
return 0.0
}
#endif
}
return 0.0
}
}
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