SnapKit/Source/Debugging.swift

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//
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// SnapKit
//
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// Copyright (c) 2011-2015 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)
import UIKit
#else
import AppKit
#endif
/**
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Used to allow adding a snp_label to a View for debugging purposes
*/
public extension View {
public var snp_label: String? {
get {
return objc_getAssociatedObject(self, &labelKey) as? String
}
set {
objc_setAssociatedObject(self, &labelKey, newValue, objc_AssociationPolicy(OBJC_ASSOCIATION_COPY_NONATOMIC))
}
}
}
/**
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Used to allow adding a snp_label to a LayoutConstraint for debugging purposes
*/
public extension LayoutConstraint {
public var snp_label: String? {
get {
return objc_getAssociatedObject(self, &labelKey) as? String
}
set {
objc_setAssociatedObject(self, &labelKey, newValue, objc_AssociationPolicy(OBJC_ASSOCIATION_COPY_NONATOMIC))
}
}
override public var description: String {
var description = "<"
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description += descriptionForObject(self)
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description += " \(descriptionForObject(self.firstItem))"
if self.firstAttribute != .NotAnAttribute {
description += ".\(self.firstAttribute.snp_description)"
}
description += " \(self.relation.snp_description)"
if let secondItem: AnyObject = self.secondItem {
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description += " \(descriptionForObject(secondItem))"
}
if self.secondAttribute != .NotAnAttribute {
description += ".\(self.secondAttribute.snp_description)"
}
if self.multiplier != 1.0 {
description += " * \(self.multiplier)"
}
if self.secondAttribute == .NotAnAttribute {
description += " \(self.constant)"
} else {
if self.constant > 0.0 {
description += " + \(self.constant)"
} else if self.constant < 0.0 {
description += " - \(CGFloat.abs(self.constant))"
}
}
if self.priority != 1000.0 {
description += " ^\(self.priority)"
}
description += ">"
return description
}
}
private var labelKey = ""
private func descriptionForObject(object: AnyObject) -> String {
let pointerDescription = NSString(format: "%p", [object])
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if let object = object as? View {
return "<\(object.dynamicType):\(object.snp_label ?? pointerDescription)>"
} else if let object = object as? LayoutConstraint {
return "<\(object.dynamicType):\(object.snp_label ?? pointerDescription)>"
}
return "<\(object.dynamicType):\(pointerDescription)>"
}
private extension NSLayoutRelation {
private var snp_description: String {
switch self {
case .Equal: return "=="
case .GreaterThanOrEqual: return ">="
case .LessThanOrEqual: return "<="
}
}
}
private extension NSLayoutAttribute {
private var snp_description: String {
#if os(iOS)
switch self {
case .NotAnAttribute: return "notAnAttribute"
case .Top: return "top"
case .Left: return "left"
case .Bottom: return "bottom"
case .Right: return "right"
case .Leading: return "leading"
case .Trailing: return "trailing"
case .Width: return "width"
case .Height: return "height"
case .CenterX: return "centerX"
case .CenterY: return "centerY"
case .Baseline: return "baseline"
case .FirstBaseline: return "firstBaseline"
case .TopMargin: return "topMargin"
case .LeftMargin: return "leftMargin"
case .BottomMargin: return "bottomMargin"
case .RightMargin: return "rightMargin"
case .LeadingMargin: return "leadingMargin"
case .TrailingMargin: return "trailingMargin"
case .CenterXWithinMargins: return "centerXWithinMargins"
case .CenterYWithinMargins: return "centerYWithinMargins"
}
#else
switch self {
case .NotAnAttribute: return "notAnAttribute"
case .Top: return "top"
case .Left: return "left"
case .Bottom: return "bottom"
case .Right: return "right"
case .Leading: return "leading"
case .Trailing: return "trailing"
case .Width: return "width"
case .Height: return "height"
case .CenterX: return "centerX"
case .CenterY: return "centerY"
case .Baseline: return "baseline"
}
#endif
}
}