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Refactoring & Documentation

This commit is contained in:
Robert Payne 2015-04-12 22:21:02 +12:00
parent 7cb3a61c14
commit c9b89ad974
14 changed files with 1104 additions and 902 deletions
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20
Snap.xcodeproj/project.pbxproj
View File

@ -35,8 +35,8 @@
EEFCF32D1AD9250C00A425FA /* Debugging.swift in Sources */ = {isa = PBXBuildFile; fileRef = EEFCF32B1AD910B900A425FA /* Debugging.swift */; };
EEFCF32F1AD926AE00A425FA /* Snap.swift in Sources */ = {isa = PBXBuildFile; fileRef = EEFCF32E1AD926AE00A425FA /* Snap.swift */; };
EEFCF3301AD92C2200A425FA /* Snap.swift in Sources */ = {isa = PBXBuildFile; fileRef = EEFCF32E1AD926AE00A425FA /* Snap.swift */; };
EEFCF3321AD9432400A425FA /* ConstraintBuilder.swift in Sources */ = {isa = PBXBuildFile; fileRef = EEFCF3311AD9432400A425FA /* ConstraintBuilder.swift */; };
EEFCF3331AD9432400A425FA /* ConstraintBuilder.swift in Sources */ = {isa = PBXBuildFile; fileRef = EEFCF3311AD9432400A425FA /* ConstraintBuilder.swift */; };
EEFCF3321AD9432400A425FA /* ConstraintDescription.swift in Sources */ = {isa = PBXBuildFile; fileRef = EEFCF3311AD9432400A425FA /* ConstraintDescription.swift */; };
EEFCF3331AD9432400A425FA /* ConstraintDescription.swift in Sources */ = {isa = PBXBuildFile; fileRef = EEFCF3311AD9432400A425FA /* ConstraintDescription.swift */; };
/* End PBXBuildFile section */
/* Begin PBXContainerItemProxy section */
@ -70,7 +70,7 @@
EECDB3841AC0C9D4006BBC11 /* Snap OSX Tests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = "Snap OSX Tests.xctest"; sourceTree = BUILT_PRODUCTS_DIR; };
EEFCF32B1AD910B900A425FA /* Debugging.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = Debugging.swift; sourceTree = "<group>"; };
EEFCF32E1AD926AE00A425FA /* Snap.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = Snap.swift; sourceTree = "<group>"; };
EEFCF3311AD9432400A425FA /* ConstraintBuilder.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = ConstraintBuilder.swift; sourceTree = "<group>"; };
EEFCF3311AD9432400A425FA /* ConstraintDescription.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = ConstraintDescription.swift; sourceTree = "<group>"; };
/* End PBXFileReference section */
/* Begin PBXFrameworksBuildPhase section */
@ -144,15 +144,15 @@
EECDB3661AC0C95C006BBC11 /* Snap.h */,
EEFCF32E1AD926AE00A425FA /* Snap.swift */,
EECDB35E1AC0C95C006BBC11 /* Constraint.swift */,
EEFCF3311AD9432400A425FA /* ConstraintBuilder.swift */,
EECDB35F1AC0C95C006BBC11 /* ConstraintAttributes.swift */,
EECDB3601AC0C95C006BBC11 /* ConstraintItem.swift */,
EEFCF3311AD9432400A425FA /* ConstraintDescription.swift */,
EECDB3611AC0C95C006BBC11 /* ConstraintMaker.swift */,
EECDB3621AC0C95C006BBC11 /* ConstraintRelation.swift */,
EECDB3671AC0C95C006BBC11 /* View+Snap.swift */,
EECDB3601AC0C95C006BBC11 /* ConstraintItem.swift */,
EECDB3631AC0C95C006BBC11 /* EdgeInsets.swift */,
EECDB3651AC0C95C006BBC11 /* LayoutConstraint.swift */,
EECDB3671AC0C95C006BBC11 /* View+Snap.swift */,
EEFCF32B1AD910B900A425FA /* Debugging.swift */,
EECDB3621AC0C95C006BBC11 /* ConstraintRelation.swift */,
EECDB35F1AC0C95C006BBC11 /* ConstraintAttributes.swift */,
EECDB36B1AC0C967006BBC11 /* Supporting Files */,
EECDB3681AC0C95C006BBC11 /* Tests */,
);
@ -354,7 +354,7 @@
EEFCF32F1AD926AE00A425FA /* Snap.swift in Sources */,
EEFCF32C1AD910B900A425FA /* Debugging.swift in Sources */,
EECDB3701AC0C9A6006BBC11 /* ConstraintRelation.swift in Sources */,
EEFCF3321AD9432400A425FA /* ConstraintBuilder.swift in Sources */,
EEFCF3321AD9432400A425FA /* ConstraintDescription.swift in Sources */,
EECDB3731AC0C9A6006BBC11 /* View+Snap.swift in Sources */,
EECDB3711AC0C9A6006BBC11 /* EdgeInsets.swift in Sources */,
EECDB36F1AC0C9A6006BBC11 /* ConstraintMaker.swift in Sources */,
@ -380,7 +380,7 @@
EEFCF3301AD92C2200A425FA /* Snap.swift in Sources */,
EEFCF32D1AD9250C00A425FA /* Debugging.swift in Sources */,
EECDB3991AC0CBFF006BBC11 /* ConstraintRelation.swift in Sources */,
EEFCF3331AD9432400A425FA /* ConstraintBuilder.swift in Sources */,
EEFCF3331AD9432400A425FA /* ConstraintDescription.swift in Sources */,
EECDB39C1AC0CBFF006BBC11 /* View+Snap.swift in Sources */,
EECDB39A1AC0CBFF006BBC11 /* EdgeInsets.swift in Sources */,
EECDB3981AC0CBFF006BBC11 /* ConstraintMaker.swift in Sources */,

336
Source/Constraint.swift
View File

@ -27,14 +27,334 @@ import UIKit
import AppKit
#endif
/**
* Constraint is a protocol that exposes the public methods on a Constraint
*/
public protocol Constraint: class {
public class Constraint {
func install() -> [LayoutConstraint]
func uninstall() -> Void
func activate() -> Void
func deactivate() -> Void
public func install() -> [LayoutConstraint] {
return self.installOnView(updateExisting: false)
}
public func uninstall() {
self.uninstallFromView()
}
public func activate() {
if NSLayoutConstraint.respondsToSelector("activateConstraints:") && self.installInfo != nil {
let layoutConstraints = self.installInfo!.layoutConstraints.allObjects as! [LayoutConstraint]
if layoutConstraints.count > 0 {
NSLayoutConstraint.activateConstraints(layoutConstraints)
}
} else {
self.install()
}
}
public func deactivate() {
if NSLayoutConstraint.respondsToSelector("deactivateConstraints:") && self.installInfo != nil {
let layoutConstraints = self.installInfo!.layoutConstraints.allObjects as! [LayoutConstraint]
if layoutConstraints.count > 0 {
NSLayoutConstraint.deactivateConstraints(layoutConstraints)
}
} else {
self.uninstall()
}
}
private let fromItem: ConstraintItem
private let toItem: ConstraintItem
private let relation: ConstraintRelation
private var constant: Any
private var multiplier: Float
private var priority: Float
private var installInfo: ConstraintInstallInfo? = nil
internal init(fromItem: ConstraintItem, toItem: ConstraintItem, relation: ConstraintRelation, constant: Any, multiplier: Float, priority: Float) {
self.fromItem = fromItem
self.toItem = toItem
self.relation = relation
self.constant = constant
self.multiplier = multiplier
self.priority = priority
}
internal func installOnView(updateExisting: Bool = false) -> [LayoutConstraint] {
var installOnView: View? = nil
if self.toItem.view != nil {
installOnView = closestCommonSuperviewBetween(self.fromItem.view, self.toItem.view)
if installOnView == nil {
NSException(name: "Cannot Install Constraint", reason: "No common superview between views", userInfo: nil).raise()
return []
}
} else {
installOnView = self.fromItem.view?.superview
if installOnView == nil {
if self.fromItem.attributes == ConstraintAttributes.Width || self.fromItem.attributes == ConstraintAttributes.Height {
installOnView = self.fromItem.view
}
if installOnView == nil {
NSException(name: "Cannot Install Constraint", reason: "Missing superview", userInfo: nil).raise()
return []
}
}
}
if let installedOnView = self.installInfo?.view {
if installedOnView != installOnView {
NSException(name: "Cannot Install Constraint", reason: "Already installed on different view.", userInfo: nil).raise()
return []
}
return self.installInfo?.layoutConstraints.allObjects as? [LayoutConstraint] ?? []
}
var newLayoutConstraints = [LayoutConstraint]()
let layoutFromAttributes = self.fromItem.attributes.layoutAttributes
let layoutToAttributes = self.toItem.attributes.layoutAttributes
// get layout from
let layoutFrom: View? = self.fromItem.view
// get layout relation
let layoutRelation: NSLayoutRelation = self.relation.layoutRelation
for layoutFromAttribute in layoutFromAttributes {
// get layout to attribute
let layoutToAttribute = (layoutToAttributes.count > 0) ? layoutToAttributes[0] : layoutFromAttribute
// get layout constant
var layoutConstant: CGFloat = layoutToAttribute.snp_constantForValue(self.constant)
// get layout to
var layoutTo: View? = self.toItem.view
if layoutTo == nil && layoutToAttribute != .Width && layoutToAttribute != .Height {
layoutTo = installOnView
}
// create layout constraint
let layoutConstraint = LayoutConstraint(
item: layoutFrom!,
attribute: layoutFromAttribute,
relatedBy: layoutRelation,
toItem: layoutTo,
attribute: layoutToAttribute,
multiplier: CGFloat(self.multiplier),
constant: layoutConstant)
// set priority
layoutConstraint.priority = self.priority
// set constraint
layoutConstraint.snp_constraint = self
newLayoutConstraints.append(layoutConstraint)
}
// special logic for updating
if updateExisting {
// get existing constraints for this view
let existingLayoutConstraints = reverse(layoutFrom!.snp_installedLayoutConstraints)
// array that will contain only new layout constraints to keep
var newLayoutConstraintsToKeep = [LayoutConstraint]()
// begin looping
for layoutConstraint in newLayoutConstraints {
// layout constraint that should be updated
var updateLayoutConstraint: LayoutConstraint? = nil
// loop through existing and check for match
for existingLayoutConstraint in existingLayoutConstraints {
if existingLayoutConstraint == layoutConstraint {
updateLayoutConstraint = existingLayoutConstraint
break
}
}
// if we have existing one lets just update the constant
if updateLayoutConstraint != nil {
updateLayoutConstraint!.constant = layoutConstraint.constant
}
// otherwise add this layout constraint to new keep list
else {
newLayoutConstraintsToKeep.append(layoutConstraint)
}
}
// set constraints to only new ones
newLayoutConstraints = newLayoutConstraintsToKeep
}
// add constraints
installOnView!.addConstraints(newLayoutConstraints)
// set install info
self.installInfo = ConstraintInstallInfo(view: installOnView, layoutConstraints: NSHashTable.weakObjectsHashTable())
// store which layout constraints are installed for this constraint
for layoutConstraint in newLayoutConstraints {
self.installInfo!.layoutConstraints.addObject(layoutConstraint)
}
// store the layout constraints against the layout from view
layoutFrom!.snp_installedLayoutConstraints += newLayoutConstraints
// return the new constraints
return newLayoutConstraints
}
internal func uninstallFromView() {
if let installInfo = self.installInfo,
let installedLayoutConstraints = installInfo.layoutConstraints.allObjects as? [LayoutConstraint] {
if installedLayoutConstraints.count > 0 {
if let installedOnView = installInfo.view {
// remove the constraints from the UIView's storage
installedOnView.removeConstraints(installedLayoutConstraints)
}
// remove the constraints from the from item view
if let fromView = self.fromItem.view {
fromView.snp_installedLayoutConstraints = fromView.snp_installedLayoutConstraints.filter {
return !contains(installedLayoutConstraints, $0)
}
}
}
}
self.installInfo = nil
}
}
private struct ConstraintInstallInfo {
weak var view: View? = nil
let layoutConstraints: NSHashTable
}
private extension NSLayoutAttribute {
private func snp_constantForValue(value: Any?) -> CGFloat {
// Float
if let float = value as? Float {
return CGFloat(float)
}
// Double
else if let double = value as? Double {
return CGFloat(double)
}
// UInt
else if let int = value as? Int {
return CGFloat(int)
}
// Int
else if let uint = value as? UInt {
return CGFloat(uint)
}
// CGFloat
else if let float = value as? CGFloat {
return float
}
// CGSize
else if let size = value as? CGSize {
if self == .Width {
return size.width
} else if self == .Height {
return size.height
}
}
// CGPoint
else if let point = value as? CGPoint {
#if os(iOS)
switch self {
case .Left, .CenterX, .LeftMargin, .CenterXWithinMargins: return point.x
case .Top, .CenterY, .TopMargin, .CenterYWithinMargins, .Baseline, .FirstBaseline: return point.y
case .Right, .RightMargin: return point.x
case .Bottom, .BottomMargin: return point.y
case .Leading, .LeadingMargin: return point.x
case .Trailing, .TrailingMargin: return point.x
case .Width, .Height, .NotAnAttribute: return CGFloat(0)
}
#else
switch self {
case .Left, .CenterX: return point.x
case .Top, .CenterY, .Baseline: return point.y
case .Right: return point.x
case .Bottom: return point.y
case .Leading: return point.x
case .Trailing: return point.x
case .Width, .Height, .NotAnAttribute: return CGFloat(0)
}
#endif
}
// EdgeInsets
else if let insets = value as? EdgeInsets {
#if os(iOS)
switch self {
case .Left, .CenterX, .LeftMargin, .CenterXWithinMargins: return insets.left
case .Top, .CenterY, .TopMargin, .CenterYWithinMargins, .Baseline, .FirstBaseline: return insets.top
case .Right, .RightMargin: return insets.right
case .Bottom, .BottomMargin: return insets.bottom
case .Leading, .LeadingMargin: return (Config.interfaceLayoutDirection == .LeftToRight) ? insets.left : -insets.right
case .Trailing, .TrailingMargin: return (Config.interfaceLayoutDirection == .LeftToRight) ? insets.right : -insets.left
case .Width, .Height, .NotAnAttribute: return CGFloat(0)
}
#else
switch self {
case .Left, .CenterX: return insets.left
case .Top, .CenterY, .Baseline: return insets.top
case .Right: return insets.right
case .Bottom: return insets.bottom
case .Leading, .LeadingMargin: return (Config.interfaceLayoutDirection == .LeftToRight) ? insets.left : -insets.right
case .Trailing, .TrailingMargin: return (Config.interfaceLayoutDirection == .LeftToRight) ? insets.right : -insets.left
case .Width, .Height, .NotAnAttribute: return CGFloat(0)
}
#endif
}
return CGFloat(0);
}
}
private func closestCommonSuperviewBetween(fromView: View?, toView: View?) -> View? {
var views = Set<View>()
var fromView = fromView
var toView = toView
do {
if let view = toView {
if views.contains(view) {
return view
}
views.insert(view)
toView = view.superview
}
if let view = fromView {
if views.contains(view) {
return view
}
views.insert(view)
fromView = view.superview
}
} while (fromView != nil || toView != nil)
return nil
}
private func ==(left: Constraint, right: Constraint) -> Bool {
return (left.fromItem == right.fromItem &&
left.toItem == right.toItem &&
left.relation == right.relation &&
left.multiplier == right.multiplier &&
left.priority == right.priority)
}
//public protocol Constraint: class {
//
// func install() -> [LayoutConstraint]
// func uninstall() -> Void
// func activate() -> Void
// func deactivate() -> Void
//
//}

8
Source/ConstraintAttributes.swift
View File

@ -28,7 +28,7 @@ import AppKit
#endif
/**
* ConstraintAttributes is an options set that maps to NSLayoutAttributes.
Used to define `NSLayoutAttributes` in a more concise and composite manner
*/
internal struct ConstraintAttributes: RawOptionSetType, BooleanType {
@ -47,9 +47,9 @@ internal struct ConstraintAttributes: RawOptionSetType, BooleanType {
internal static func convertFromNilLiteral() -> ConstraintAttributes { return self(0) }
internal var boolValue: Bool { return self.rawValue != 0 }
func toRaw() -> UInt { return self.rawValue }
static func fromRaw(raw: UInt) -> ConstraintAttributes? { return self(raw) }
static func fromMask(raw: UInt) -> ConstraintAttributes { return self(raw) }
internal func toRaw() -> UInt { return self.rawValue }
internal static func fromRaw(raw: UInt) -> ConstraintAttributes? { return self(raw) }
internal static func fromMask(raw: UInt) -> ConstraintAttributes { return self(raw) }
// normal

802
Source/ConstraintBuilder.swift
View File

@ -1,802 +0,0 @@
//
// Snap
//
// Copyright (c) 2011-2015 Masonry Team - https://github.com/Masonry
//
// 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
/**
* ConstraintBuilderFinalizable is a protocol that allows getting a finalized constraint
*/
public protocol ConstraintBuilderFinalizable: class {
var constraint: Constraint { get }
}
/**
* ConstraintBuilderPriortizable is a protocol that allows a constraint to be prioritized
*/
public protocol ConstraintBuilderPriortizable: ConstraintBuilderFinalizable {
func priority(priority: Float) -> ConstraintBuilderFinalizable
func priority(priority: Double) -> ConstraintBuilderFinalizable
func priority(priority: CGFloat) -> ConstraintBuilderFinalizable
func priority(priority: UInt) -> ConstraintBuilderFinalizable
func priority(priority: Int) -> ConstraintBuilderFinalizable
func priorityRequired() -> ConstraintBuilderFinalizable
func priorityHigh() -> ConstraintBuilderFinalizable
func priorityMedium() -> ConstraintBuilderFinalizable
func priorityLow() -> ConstraintBuilderFinalizable
}
/**
* ConstraintBuilderMultipliable is a protocol that allows a constraint to be multiplied
*/
public protocol ConstraintBuilderMultipliable: ConstraintBuilderPriortizable {
func multipliedBy(amount: Float) -> ConstraintBuilderPriortizable
func multipliedBy(amount: Double) -> ConstraintBuilderPriortizable
func multipliedBy(amount: CGFloat) -> ConstraintBuilderPriortizable
func multipliedBy(amount: Int) -> ConstraintBuilderPriortizable
func multipliedBy(amount: UInt) -> ConstraintBuilderPriortizable
func dividedBy(amount: Float) -> ConstraintBuilderPriortizable
func dividedBy(amount: Double) -> ConstraintBuilderPriortizable
func dividedBy(amount: CGFloat) -> ConstraintBuilderPriortizable
func dividedBy(amount: Int) -> ConstraintBuilderPriortizable
func dividedBy(amount: UInt) -> ConstraintBuilderPriortizable
}
/**
* ConstraintBuilderOffsetable is a protocol that allows a constraint to be offset / inset
*/
public protocol ConstraintBuilderOffsetable: ConstraintBuilderMultipliable {
func offset(amount: Float) -> ConstraintBuilderMultipliable
func offset(amount: Double) -> ConstraintBuilderMultipliable
func offset(amount: CGFloat) -> ConstraintBuilderMultipliable
func offset(amount: Int) -> ConstraintBuilderMultipliable
func offset(amount: UInt) -> ConstraintBuilderMultipliable
func offset(amount: CGPoint) -> ConstraintBuilderMultipliable
func offset(amount: CGSize) -> ConstraintBuilderMultipliable
func offset(amount: EdgeInsets) -> ConstraintBuilderMultipliable
func insets(amount: EdgeInsets) -> ConstraintBuilderMultipliable
}
/**
* ConstraintBuilderRelatable is a protocol that allows a constraint to be set related to another item/constant by equalTo, lessThanOrEqualTo or greaterThanOrEqualTo
*/
public protocol ConstraintBuilderRelatable: class {
func equalTo(other: ConstraintItem) -> ConstraintBuilderOffsetable
func equalTo(other: View) -> ConstraintBuilderOffsetable
#if os(iOS)
func equalTo(other: UILayoutSupport) -> ConstraintBuilderOffsetable
#endif
func equalTo(other: Float) -> ConstraintBuilderMultipliable
func equalTo(other: Double) -> ConstraintBuilderMultipliable
func equalTo(other: CGFloat) -> ConstraintBuilderMultipliable
func equalTo(other: Int) -> ConstraintBuilderMultipliable
func equalTo(other: UInt) -> ConstraintBuilderMultipliable
func equalTo(other: CGSize) -> ConstraintBuilderMultipliable
func equalTo(other: CGPoint) -> ConstraintBuilderMultipliable
func equalTo(other: EdgeInsets) -> ConstraintBuilderMultipliable
func lessThanOrEqualTo(other: ConstraintItem) -> ConstraintBuilderOffsetable
func lessThanOrEqualTo(other: View) -> ConstraintBuilderOffsetable
#if os(iOS)
func lessThanOrEqualTo(other: UILayoutSupport) -> ConstraintBuilderOffsetable
#endif
func lessThanOrEqualTo(other: Float) -> ConstraintBuilderMultipliable
func lessThanOrEqualTo(other: Double) -> ConstraintBuilderMultipliable
func lessThanOrEqualTo(other: CGFloat) -> ConstraintBuilderMultipliable
func lessThanOrEqualTo(other: Int) -> ConstraintBuilderMultipliable
func lessThanOrEqualTo(other: UInt) -> ConstraintBuilderMultipliable
func lessThanOrEqualTo(other: CGSize) -> ConstraintBuilderMultipliable
func lessThanOrEqualTo(other: CGPoint) -> ConstraintBuilderMultipliable
func lessThanOrEqualTo(other: EdgeInsets) -> ConstraintBuilderMultipliable
func greaterThanOrEqualTo(other: ConstraintItem) -> ConstraintBuilderOffsetable
func greaterThanOrEqualTo(other: View) -> ConstraintBuilderOffsetable
#if os(iOS)
func greaterThanOrEqualTo(other: UILayoutSupport) -> ConstraintBuilderOffsetable
#endif
func greaterThanOrEqualTo(other: Float) -> ConstraintBuilderMultipliable
func greaterThanOrEqualTo(other: Double) -> ConstraintBuilderMultipliable
func greaterThanOrEqualTo(other: CGFloat) -> ConstraintBuilderMultipliable
func greaterThanOrEqualTo(other: Int) -> ConstraintBuilderMultipliable
func greaterThanOrEqualTo(other: UInt) -> ConstraintBuilderMultipliable
func greaterThanOrEqualTo(other: CGSize) -> ConstraintBuilderMultipliable
func greaterThanOrEqualTo(other: CGPoint) -> ConstraintBuilderMultipliable
func greaterThanOrEqualTo(other: EdgeInsets) -> ConstraintBuilderMultipliable
}
/**
* ConstraintBuilderExtendable is a protocol that allows a constraint to be extended
*/
public protocol ConstraintBuilderExtendable: ConstraintBuilderRelatable {
var left: ConstraintBuilderExtendable { get }
var top: ConstraintBuilderExtendable { get }
var bottom: ConstraintBuilderExtendable { get }
var right: ConstraintBuilderExtendable { get }
var leading: ConstraintBuilderExtendable { get }
var trailing: ConstraintBuilderExtendable { get }
var width: ConstraintBuilderExtendable { get }
var height: ConstraintBuilderExtendable { get }
var centerX: ConstraintBuilderExtendable { get }
var centerY: ConstraintBuilderExtendable { get }
var baseline: ConstraintBuilderExtendable { get }
#if os(iOS)
var firstBaseline: ConstraintBuilderExtendable { get }
var leftMargin: ConstraintBuilderExtendable { get }
var rightMargin: ConstraintBuilderExtendable { get }
var topMargin: ConstraintBuilderExtendable { get }
var bottomMargin: ConstraintBuilderExtendable { get }
var leadingMargin: ConstraintBuilderExtendable { get }
var trailingMargin: ConstraintBuilderExtendable { get }
var centerXWithinMargins: ConstraintBuilderExtendable { get }
var centerYWithinMargins: ConstraintBuilderExtendable { get }
#endif
}
/**
* ConstraintBuilder is a single item that defines all the properties for a single ConstraintMaker building chain
*/
final internal class ConstraintBuilder: Constraint, ConstraintBuilderExtendable, ConstraintBuilderOffsetable, ConstraintBuilderFinalizable {
var left: ConstraintBuilderExtendable { return self.addConstraint(ConstraintAttributes.Left) }
var top: ConstraintBuilderExtendable { return self.addConstraint(ConstraintAttributes.Top) }
var right: ConstraintBuilderExtendable { return self.addConstraint(ConstraintAttributes.Right) }
var bottom: ConstraintBuilderExtendable { return self.addConstraint(ConstraintAttributes.Bottom) }
var leading: ConstraintBuilderExtendable { return self.addConstraint(ConstraintAttributes.Leading) }
var trailing: ConstraintBuilderExtendable { return self.addConstraint(ConstraintAttributes.Trailing) }
var width: ConstraintBuilderExtendable { return self.addConstraint(ConstraintAttributes.Width) }
var height: ConstraintBuilderExtendable { return self.addConstraint(ConstraintAttributes.Height) }
var centerX: ConstraintBuilderExtendable { return self.addConstraint(ConstraintAttributes.CenterX) }
var centerY: ConstraintBuilderExtendable { return self.addConstraint(ConstraintAttributes.CenterY) }
var baseline: ConstraintBuilderExtendable { return self.addConstraint(ConstraintAttributes.Baseline) }
#if os(iOS)
var firstBaseline: ConstraintBuilderExtendable { return self.addConstraint(ConstraintAttributes.FirstBaseline) }
var leftMargin: ConstraintBuilderExtendable { return self.addConstraint(ConstraintAttributes.LeftMargin) }
var rightMargin: ConstraintBuilderExtendable { return self.addConstraint(ConstraintAttributes.RightMargin) }
var topMargin: ConstraintBuilderExtendable { return self.addConstraint(ConstraintAttributes.TopMargin) }
var bottomMargin: ConstraintBuilderExtendable { return self.addConstraint(ConstraintAttributes.BottomMargin) }
var leadingMargin: ConstraintBuilderExtendable { return self.addConstraint(ConstraintAttributes.LeadingMargin) }
var trailingMargin: ConstraintBuilderExtendable { return self.addConstraint(ConstraintAttributes.TrailingMargin) }
var centerXWithinMargins: ConstraintBuilderExtendable { return self.addConstraint(ConstraintAttributes.CenterXWithinMargins) }
var centerYWithinMargins: ConstraintBuilderExtendable { return self.addConstraint(ConstraintAttributes.CenterYWithinMargins) }
#endif
// MARK: initializer
init(fromItem: ConstraintItem) {
self.fromItem = fromItem
self.toItem = ConstraintItem(object: nil, attributes: ConstraintAttributes.None)
}
// MARK: equalTo
func equalTo(other: ConstraintItem) -> ConstraintBuilderOffsetable {
return self.constrainTo(other, relation: .Equal)
}
func equalTo(other: View) -> ConstraintBuilderOffsetable {
return self.constrainTo(other, relation: .Equal)
}
#if os(iOS)
func equalTo(other: UILayoutSupport) -> ConstraintBuilderOffsetable {
return self.constrainTo(other, relation: .Equal)
}
#endif
func equalTo(other: Float) -> ConstraintBuilderMultipliable {
return self.constrainTo(other, relation: .Equal)
}
func equalTo(other: Double) -> ConstraintBuilderMultipliable {
return self.constrainTo(Float(other), relation: .Equal)
}
func equalTo(other: CGFloat) -> ConstraintBuilderMultipliable {
return self.constrainTo(Float(other), relation: .Equal)
}
func equalTo(other: Int) -> ConstraintBuilderMultipliable {
return self.constrainTo(Float(other), relation: .Equal)
}
func equalTo(other: UInt) -> ConstraintBuilderMultipliable {
return self.constrainTo(Float(other), relation: .Equal)
}
func equalTo(other: CGSize) -> ConstraintBuilderMultipliable {
return self.constrainTo(other, relation: .Equal)
}
func equalTo(other: CGPoint) -> ConstraintBuilderMultipliable {
return self.constrainTo(other, relation: .Equal)
}
func equalTo(other: EdgeInsets) -> ConstraintBuilderMultipliable {
return self.constrainTo(other, relation: .Equal)
}
// MARK: lessThanOrEqualTo
func lessThanOrEqualTo(other: ConstraintItem) -> ConstraintBuilderOffsetable {
return self.constrainTo(other, relation: .LessThanOrEqualTo)
}
func lessThanOrEqualTo(other: View) -> ConstraintBuilderOffsetable {
return self.constrainTo(other, relation: .LessThanOrEqualTo)
}
#if os(iOS)
func lessThanOrEqualTo(other: UILayoutSupport) -> ConstraintBuilderOffsetable {
return self.constrainTo(other, relation: .LessThanOrEqualTo)
}
#endif
func lessThanOrEqualTo(other: Float) -> ConstraintBuilderMultipliable {
return self.constrainTo(other, relation: .LessThanOrEqualTo)
}
func lessThanOrEqualTo(other: Double) -> ConstraintBuilderMultipliable {
return self.constrainTo(Float(other), relation: .LessThanOrEqualTo)
}
func lessThanOrEqualTo(other: CGFloat) -> ConstraintBuilderMultipliable {
return self.constrainTo(Float(other), relation: .LessThanOrEqualTo)
}
func lessThanOrEqualTo(other: Int) -> ConstraintBuilderMultipliable {
return self.constrainTo(Float(other), relation: .LessThanOrEqualTo)
}
func lessThanOrEqualTo(other: UInt) -> ConstraintBuilderMultipliable {
return self.constrainTo(Float(other), relation: .LessThanOrEqualTo)
}
func lessThanOrEqualTo(other: CGSize) -> ConstraintBuilderMultipliable {
return self.constrainTo(other, relation: .LessThanOrEqualTo)
}
func lessThanOrEqualTo(other: CGPoint) -> ConstraintBuilderMultipliable {
return self.constrainTo(other, relation: .LessThanOrEqualTo)
}
func lessThanOrEqualTo(other: EdgeInsets) -> ConstraintBuilderMultipliable {
return self.constrainTo(other, relation: .LessThanOrEqualTo)
}
// MARK: greaterThanOrEqualTo
func greaterThanOrEqualTo(other: ConstraintItem) -> ConstraintBuilderOffsetable {
return self.constrainTo(other, relation: .GreaterThanOrEqualTo)
}
func greaterThanOrEqualTo(other: View) -> ConstraintBuilderOffsetable {
return self.constrainTo(other, relation: .GreaterThanOrEqualTo)
}
#if os(iOS)
func greaterThanOrEqualTo(other: UILayoutSupport) -> ConstraintBuilderOffsetable {
return self.constrainTo(other, relation: .GreaterThanOrEqualTo)
}
#endif
func greaterThanOrEqualTo(other: Float) -> ConstraintBuilderMultipliable {
return self.constrainTo(other, relation: .GreaterThanOrEqualTo)
}
func greaterThanOrEqualTo(other: Double) -> ConstraintBuilderMultipliable {
return self.constrainTo(Float(other), relation: .GreaterThanOrEqualTo)
}
func greaterThanOrEqualTo(other: CGFloat) -> ConstraintBuilderMultipliable {
return self.constrainTo(Float(other), relation: .GreaterThanOrEqualTo)
}
func greaterThanOrEqualTo(other: Int) -> ConstraintBuilderMultipliable {
return self.constrainTo(Float(other), relation: .GreaterThanOrEqualTo)
}
func greaterThanOrEqualTo(other: UInt) -> ConstraintBuilderMultipliable {
return self.constrainTo(Float(other), relation: .GreaterThanOrEqualTo)
}
func greaterThanOrEqualTo(other: CGSize) -> ConstraintBuilderMultipliable {
return self.constrainTo(other, relation: .GreaterThanOrEqualTo)
}
func greaterThanOrEqualTo(other: CGPoint) -> ConstraintBuilderMultipliable {
return self.constrainTo(other, relation: .GreaterThanOrEqualTo)
}
func greaterThanOrEqualTo(other: EdgeInsets) -> ConstraintBuilderMultipliable {
return self.constrainTo(other, relation: .GreaterThanOrEqualTo)
}
// MARK: multiplier
func multipliedBy(amount: Float) -> ConstraintBuilderPriortizable {
self.multiplier = amount
return self
}
func multipliedBy(amount: Double) -> ConstraintBuilderPriortizable {
return self.multipliedBy(Float(amount))
}
func multipliedBy(amount: CGFloat) -> ConstraintBuilderPriortizable {
return self.multipliedBy(Float(amount))
}
func multipliedBy(amount: Int) -> ConstraintBuilderPriortizable {
return self.multipliedBy(Float(amount))
}
func multipliedBy(amount: UInt) -> ConstraintBuilderPriortizable {
return self.multipliedBy(Float(amount))
}
func dividedBy(amount: Float) -> ConstraintBuilderPriortizable {
self.multiplier = 1.0 / amount;
return self
}
func dividedBy(amount: Double) -> ConstraintBuilderPriortizable {
return self.dividedBy(Float(amount))
}
func dividedBy(amount: CGFloat) -> ConstraintBuilderPriortizable {
return self.dividedBy(Float(amount))
}
func dividedBy(amount: Int) -> ConstraintBuilderPriortizable {
return self.dividedBy(Float(amount))
}
func dividedBy(amount: UInt) -> ConstraintBuilderPriortizable {
return self.dividedBy(Float(amount))
}
// MARK: priority
func priority(priority: Float) -> ConstraintBuilderFinalizable {
self.priority = priority
return self
}
func priority(priority: Double) -> ConstraintBuilderFinalizable {
return self.priority(Float(priority))
}
func priority(priority: CGFloat) -> ConstraintBuilderFinalizable {
return self.priority(Float(priority))
}
func priority(priority: UInt) -> ConstraintBuilderFinalizable {
return self.priority(Float(priority))
}
func priority(priority: Int) -> ConstraintBuilderFinalizable {
return self.priority(Float(priority))
}
func priorityRequired() -> ConstraintBuilderFinalizable {
return self.priority(1000.0)
}
func priorityHigh() -> ConstraintBuilderFinalizable {
return self.priority(750.0)
}
func priorityMedium() -> ConstraintBuilderFinalizable {
#if os(iOS)
return self.priority(500.0)
#else
return self.priority(501.0)
#endif
}
func priorityLow() -> ConstraintBuilderFinalizable {
return self.priority(250.0)
}
// MARK: offset
func offset(amount: Float) -> ConstraintBuilderMultipliable {
self.constant = amount
return self
}
func offset(amount: Double) -> ConstraintBuilderMultipliable {
return self.offset(Float(amount))
}
func offset(amount: CGFloat) -> ConstraintBuilderMultipliable {
return self.offset(Float(amount))
}
func offset(amount: Int) -> ConstraintBuilderMultipliable {
return self.offset(Float(amount))
}
func offset(amount: UInt) -> ConstraintBuilderMultipliable {
return self.offset(Float(amount))
}
func offset(amount: CGPoint) -> ConstraintBuilderMultipliable {
self.constant = amount
return self
}
func offset(amount: CGSize) -> ConstraintBuilderMultipliable {
self.constant = amount
return self
}
func offset(amount: EdgeInsets) -> ConstraintBuilderMultipliable {
self.constant = amount
return self
}
// MARK: insets
func insets(amount: EdgeInsets) -> ConstraintBuilderMultipliable {
self.constant = EdgeInsets(top: amount.top, left: amount.left, bottom: -amount.bottom, right: -amount.right)
return self
}
// MARK: Constraint
var constraint: Constraint {
return self
}
// MARK: install / uninstall
func install() -> [LayoutConstraint] {
return self.installOnView(updateExisting: false)
}
func uninstall() {
self.uninstallFromView()
}
func activate() {
if NSLayoutConstraint.respondsToSelector("activateConstraints:") && self.installInfo != nil {
let layoutConstraints = self.installInfo!.layoutConstraints.allObjects as! [LayoutConstraint]
if layoutConstraints.count > 0 {
NSLayoutConstraint.activateConstraints(layoutConstraints)
}
} else {
self.install()
}
}
func deactivate() {
if NSLayoutConstraint.respondsToSelector("deactivateConstraints:") && self.installInfo != nil {
let layoutConstraints = self.installInfo!.layoutConstraints.allObjects as! [LayoutConstraint]
if layoutConstraints.count > 0 {
NSLayoutConstraint.deactivateConstraints(layoutConstraints)
}
} else {
self.uninstall()
}
}
func installOnView(updateExisting: Bool = false) -> [LayoutConstraint] {
var installOnView: View? = nil
if self.toItem.view != nil {
installOnView = ConstraintBuilder.closestCommonSuperviewFromView(self.fromItem.view, toView: self.toItem.view)
if installOnView == nil {
NSException(name: "Cannot Install Constraint", reason: "No common superview between views", userInfo: nil).raise()
return []
}
} else {
installOnView = self.fromItem.view?.superview
if installOnView == nil {
if self.fromItem.attributes == ConstraintAttributes.Width || self.fromItem.attributes == ConstraintAttributes.Height {
installOnView = self.fromItem.view
}
if installOnView == nil {
NSException(name: "Cannot Install Constraint", reason: "Missing superview", userInfo: nil).raise()
return []
}
}
}
if let installedOnView = self.installInfo?.view {
if installedOnView != installOnView {
NSException(name: "Cannot Install Constraint", reason: "Already installed on different view.", userInfo: nil).raise()
return []
}
return self.installInfo?.layoutConstraints.allObjects as? [LayoutConstraint] ?? []
}
var newLayoutConstraints = [LayoutConstraint]()
let layoutFromAttributes = self.fromItem.attributes.layoutAttributes
let layoutToAttributes = self.toItem.attributes.layoutAttributes
// get layout from
let layoutFrom: View? = self.fromItem.view
// get layout relation
let layoutRelation: NSLayoutRelation = (self.relation != nil) ? self.relation!.layoutRelation : .Equal
for layoutFromAttribute in layoutFromAttributes {
// get layout to attribute
let layoutToAttribute = (layoutToAttributes.count > 0) ? layoutToAttributes[0] : layoutFromAttribute
// get layout constant
var layoutConstant: CGFloat = layoutToAttribute.snp_constantForValue(self.constant)
// get layout to
var layoutTo: View? = self.toItem.view
if layoutTo == nil && layoutToAttribute != .Width && layoutToAttribute != .Height {
layoutTo = installOnView
}
// create layout constraint
let layoutConstraint = LayoutConstraint(
item: layoutFrom!,
attribute: layoutFromAttribute,
relatedBy: layoutRelation,
toItem: layoutTo,
attribute: layoutToAttribute,
multiplier: CGFloat(self.multiplier),
constant: layoutConstant)
// set priority
layoutConstraint.priority = self.priority
// set constraint
layoutConstraint.snp_constraint = self
newLayoutConstraints.append(layoutConstraint)
}
// special logic for updating
if updateExisting {
// get existing constraints for this view
let existingLayoutConstraints = reverse(layoutFrom!.snp_installedLayoutConstraints)
// array that will contain only new layout constraints to keep
var newLayoutConstraintsToKeep = [LayoutConstraint]()
// begin looping
for layoutConstraint in newLayoutConstraints {
// layout constraint that should be updated
var updateLayoutConstraint: LayoutConstraint? = nil
// loop through existing and check for match
for existingLayoutConstraint in existingLayoutConstraints {
if existingLayoutConstraint == layoutConstraint {
updateLayoutConstraint = existingLayoutConstraint
break
}
}
// if we have existing one lets just update the constant
if updateLayoutConstraint != nil {
updateLayoutConstraint!.constant = layoutConstraint.constant
}
// otherwise add this layout constraint to new keep list
else {
newLayoutConstraintsToKeep.append(layoutConstraint)
}
}
// set constraints to only new ones
newLayoutConstraints = newLayoutConstraintsToKeep
}
// add constraints
installOnView!.addConstraints(newLayoutConstraints)
// set install info
self.installInfo = ConstraintInstallInfo(view: installOnView, layoutConstraints: NSHashTable.weakObjectsHashTable())
// store which layout constraints are installed for this constraint
for layoutConstraint in newLayoutConstraints {
self.installInfo!.layoutConstraints.addObject(layoutConstraint)
}
// store the layout constraints against the layout from view
layoutFrom!.snp_installedLayoutConstraints += newLayoutConstraints
// return the new constraints
return newLayoutConstraints
}
func uninstallFromView() {
if let installInfo = self.installInfo,
let installedLayoutConstraints = installInfo.layoutConstraints.allObjects as? [LayoutConstraint] {
if installedLayoutConstraints.count > 0 {
if let installedOnView = installInfo.view {
// remove the constraints from the UIView's storage
installedOnView.removeConstraints(installedLayoutConstraints)
}
// remove the constraints from the from item view
if let fromView = self.fromItem.view {
fromView.snp_installedLayoutConstraints = fromView.snp_installedLayoutConstraints.filter {
return !contains(installedLayoutConstraints, $0)
}
}
}
}
self.installInfo = nil
}
// MARK: private
private let fromItem: ConstraintItem
private var toItem: ConstraintItem
private var relation: ConstraintRelation?
private var constant: Any = Float(0.0)
private var multiplier: Float = 1.0
private var priority: Float = 1000.0
private var installInfo: ConstraintInstallInfo?
private func addConstraint(attributes: ConstraintAttributes) -> ConstraintBuilder {
if self.relation == nil {
self.fromItem.attributes += attributes
}
return self
}
private func constrainTo(other: ConstraintItem, relation: ConstraintRelation) -> ConstraintBuilder {
if other.attributes != ConstraintAttributes.None {
let toLayoutAttributes = other.attributes.layoutAttributes
if toLayoutAttributes.count > 1 {
let fromLayoutAttributes = self.fromItem.attributes.layoutAttributes
if toLayoutAttributes != fromLayoutAttributes {
NSException(name: "Invalid Constraint", reason: "Cannot constrain to multiple non identical attributes", userInfo: nil).raise()
return self
}
other.attributes = ConstraintAttributes.None
}
}
self.toItem = other
self.relation = relation
return self
}
private func constrainTo(other: View, relation: ConstraintRelation) -> ConstraintBuilder {
return constrainTo(ConstraintItem(object: other, attributes: ConstraintAttributes.None), relation: relation)
}
#if os(iOS)
private func constrainTo(other: UILayoutSupport, relation: ConstraintRelation) -> ConstraintBuilder {
return constrainTo(ConstraintItem(object: other, attributes: ConstraintAttributes.None), relation: relation)
}
#endif
private func constrainTo(other: Float, relation: ConstraintRelation) -> ConstraintBuilder {
self.constant = other
return constrainTo(ConstraintItem(object: nil, attributes: ConstraintAttributes.None), relation: relation)
}
private func constrainTo(other: Double, relation: ConstraintRelation) -> ConstraintBuilder {
self.constant = other
return constrainTo(ConstraintItem(object: nil, attributes: ConstraintAttributes.None), relation: relation)
}
private func constrainTo(other: CGSize, relation: ConstraintRelation) -> ConstraintBuilder {
self.constant = other
return constrainTo(ConstraintItem(object: nil, attributes: ConstraintAttributes.None), relation: relation)
}
private func constrainTo(other: CGPoint, relation: ConstraintRelation) -> ConstraintBuilder {
self.constant = other
return constrainTo(ConstraintItem(object: nil, attributes: ConstraintAttributes.None), relation: relation)
}
private func constrainTo(other: EdgeInsets, relation: ConstraintRelation) -> ConstraintBuilder {
self.constant = other
return constrainTo(ConstraintItem(object: nil, attributes: ConstraintAttributes.None), relation: relation)
}
private class func closestCommonSuperviewFromView(fromView: View?, toView: View?) -> View? {
var views = Set<View>()
var fromView = fromView
var toView = toView
do {
if let view = toView {
if views.contains(view) {
return view
}
views.insert(view)
toView = view.superview
}
if let view = fromView {
if views.contains(view) {
return view
}
views.insert(view)
fromView = view.superview
}
} while (fromView != nil || toView != nil)
return nil
}
}
private extension NSLayoutAttribute {
private func snp_constantForValue(value: Any?) -> CGFloat {
// Float
if let float = value as? Float {
return CGFloat(float)
}
// Double
else if let double = value as? Double {
return CGFloat(double)
}
// UInt
else if let int = value as? Int {
return CGFloat(int)
}
// Int
else if let uint = value as? UInt {
return CGFloat(uint)
}
// CGFloat
else if let float = value as? CGFloat {
return float
}
// CGSize
else if let size = value as? CGSize {
if self == .Width {
return size.width
} else if self == .Height {
return size.height
}
}
// CGPoint
else if let point = value as? CGPoint {
#if os(iOS)
switch self {
case .Left, .CenterX, .LeftMargin, .CenterXWithinMargins: return point.x
case .Top, .CenterY, .TopMargin, .CenterYWithinMargins, .Baseline, .FirstBaseline: return point.y
case .Right, .RightMargin: return point.x
case .Bottom, .BottomMargin: return point.y
case .Leading, .LeadingMargin: return point.x
case .Trailing, .TrailingMargin: return point.x
case .Width, .Height, .NotAnAttribute: return CGFloat(0)
}
#else
switch self {
case .Left, .CenterX: return point.x
case .Top, .CenterY, .Baseline: return point.y
case .Right: return point.x
case .Bottom: return point.y
case .Leading: return point.x
case .Trailing: return point.x
case .Width, .Height, .NotAnAttribute: return CGFloat(0)
}
#endif
}
// EdgeInsets
else if let insets = value as? EdgeInsets {
#if os(iOS)
switch self {
case .Left, .CenterX, .LeftMargin, .CenterXWithinMargins: return insets.left
case .Top, .CenterY, .TopMargin, .CenterYWithinMargins, .Baseline, .FirstBaseline: return insets.top
case .Right, .RightMargin: return insets.right
case .Bottom, .BottomMargin: return insets.bottom
case .Leading, .LeadingMargin: return (Config.interfaceLayoutDirection == .LeftToRight) ? insets.left : -insets.right
case .Trailing, .TrailingMargin: return (Config.interfaceLayoutDirection == .LeftToRight) ? insets.right : -insets.left
case .Width, .Height, .NotAnAttribute: return CGFloat(0)
}
#else
switch self {
case .Left, .CenterX: return insets.left
case .Top, .CenterY, .Baseline: return insets.top
case .Right: return insets.right
case .Bottom: return insets.bottom
case .Leading, .LeadingMargin: return (Config.interfaceLayoutDirection == .LeftToRight) ? insets.left : -insets.right
case .Trailing, .TrailingMargin: return (Config.interfaceLayoutDirection == .LeftToRight) ? insets.right : -insets.left
case .Width, .Height, .NotAnAttribute: return CGFloat(0)
}
#endif
}
return CGFloat(0);
}
}
private struct ConstraintInstallInfo {
weak var view: View? = nil
let layoutConstraints: NSHashTable
}
internal func ==(left: ConstraintBuilder, right: ConstraintBuilder) -> Bool {
return (left.fromItem == right.fromItem &&
left.toItem == right.toItem &&
left.relation == right.relation &&
left.multiplier == right.multiplier &&
left.priority == right.priority)
}

547
Source/ConstraintDescription.swift Normal file
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@ -0,0 +1,547 @@
//
// Snap
//
// Copyright (c) 2011-2015 Masonry Team - https://github.com/Masonry
//
// 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
/**
Used to expose the final API of a `ConstraintDescription` which allows getting a constraint from it
*/
public protocol ConstraintDescriptionFinalizable: class {
var constraint: Constraint { get }
}
/**
Used to expose priority APIs
*/
public protocol ConstraintDescriptionPriortizable: ConstraintDescriptionFinalizable {
func priority(priority: Float) -> ConstraintDescriptionFinalizable
func priority(priority: Double) -> ConstraintDescriptionFinalizable
func priority(priority: CGFloat) -> ConstraintDescriptionFinalizable
func priority(priority: UInt) -> ConstraintDescriptionFinalizable
func priority(priority: Int) -> ConstraintDescriptionFinalizable
func priorityRequired() -> ConstraintDescriptionFinalizable
func priorityHigh() -> ConstraintDescriptionFinalizable
func priorityMedium() -> ConstraintDescriptionFinalizable
func priorityLow() -> ConstraintDescriptionFinalizable
}
/**
Used to expose multiplier APIs
*/
public protocol ConstraintDescriptionMultipliable: ConstraintDescriptionPriortizable {
func multipliedBy(amount: Float) -> ConstraintDescriptionPriortizable
func multipliedBy(amount: Double) -> ConstraintDescriptionPriortizable
func multipliedBy(amount: CGFloat) -> ConstraintDescriptionPriortizable
func multipliedBy(amount: Int) -> ConstraintDescriptionPriortizable
func multipliedBy(amount: UInt) -> ConstraintDescriptionPriortizable
func dividedBy(amount: Float) -> ConstraintDescriptionPriortizable
func dividedBy(amount: Double) -> ConstraintDescriptionPriortizable
func dividedBy(amount: CGFloat) -> ConstraintDescriptionPriortizable
func dividedBy(amount: Int) -> ConstraintDescriptionPriortizable
func dividedBy(amount: UInt) -> ConstraintDescriptionPriortizable
}
/**
Used to expose constant APIs
*/
public protocol ConstraintDescriptionOffsetable: ConstraintDescriptionMultipliable {
func offset(amount: Float) -> ConstraintDescriptionMultipliable
func offset(amount: Double) -> ConstraintDescriptionMultipliable
func offset(amount: CGFloat) -> ConstraintDescriptionMultipliable
func offset(amount: Int) -> ConstraintDescriptionMultipliable
func offset(amount: UInt) -> ConstraintDescriptionMultipliable
func offset(amount: CGPoint) -> ConstraintDescriptionMultipliable
func offset(amount: CGSize) -> ConstraintDescriptionMultipliable
func offset(amount: EdgeInsets) -> ConstraintDescriptionMultipliable
func insets(amount: EdgeInsets) -> ConstraintDescriptionMultipliable
}
/**
Used to expose relation APIs
*/
public protocol ConstraintDescriptionRelatable: class {
func equalTo(other: ConstraintItem) -> ConstraintDescriptionOffsetable
func equalTo(other: View) -> ConstraintDescriptionOffsetable
#if os(iOS)
func equalTo(other: UILayoutSupport) -> ConstraintDescriptionOffsetable
#endif
func equalTo(other: Float) -> ConstraintDescriptionMultipliable
func equalTo(other: Double) -> ConstraintDescriptionMultipliable
func equalTo(other: CGFloat) -> ConstraintDescriptionMultipliable
func equalTo(other: Int) -> ConstraintDescriptionMultipliable
func equalTo(other: UInt) -> ConstraintDescriptionMultipliable
func equalTo(other: CGSize) -> ConstraintDescriptionMultipliable
func equalTo(other: CGPoint) -> ConstraintDescriptionMultipliable
func equalTo(other: EdgeInsets) -> ConstraintDescriptionMultipliable
func lessThanOrEqualTo(other: ConstraintItem) -> ConstraintDescriptionOffsetable
func lessThanOrEqualTo(other: View) -> ConstraintDescriptionOffsetable
#if os(iOS)
func lessThanOrEqualTo(other: UILayoutSupport) -> ConstraintDescriptionOffsetable
#endif
func lessThanOrEqualTo(other: Float) -> ConstraintDescriptionMultipliable
func lessThanOrEqualTo(other: Double) -> ConstraintDescriptionMultipliable
func lessThanOrEqualTo(other: CGFloat) -> ConstraintDescriptionMultipliable
func lessThanOrEqualTo(other: Int) -> ConstraintDescriptionMultipliable
func lessThanOrEqualTo(other: UInt) -> ConstraintDescriptionMultipliable
func lessThanOrEqualTo(other: CGSize) -> ConstraintDescriptionMultipliable
func lessThanOrEqualTo(other: CGPoint) -> ConstraintDescriptionMultipliable
func lessThanOrEqualTo(other: EdgeInsets) -> ConstraintDescriptionMultipliable
func greaterThanOrEqualTo(other: ConstraintItem) -> ConstraintDescriptionOffsetable
func greaterThanOrEqualTo(other: View) -> ConstraintDescriptionOffsetable
#if os(iOS)
func greaterThanOrEqualTo(other: UILayoutSupport) -> ConstraintDescriptionOffsetable
#endif
func greaterThanOrEqualTo(other: Float) -> ConstraintDescriptionMultipliable
func greaterThanOrEqualTo(other: Double) -> ConstraintDescriptionMultipliable
func greaterThanOrEqualTo(other: CGFloat) -> ConstraintDescriptionMultipliable
func greaterThanOrEqualTo(other: Int) -> ConstraintDescriptionMultipliable
func greaterThanOrEqualTo(other: UInt) -> ConstraintDescriptionMultipliable
func greaterThanOrEqualTo(other: CGSize) -> ConstraintDescriptionMultipliable
func greaterThanOrEqualTo(other: CGPoint) -> ConstraintDescriptionMultipliable
func greaterThanOrEqualTo(other: EdgeInsets) -> ConstraintDescriptionMultipliable
}
/**
Used to expose chaining APIs
*/
public protocol ConstraintDescriptionExtendable: ConstraintDescriptionRelatable {
var left: ConstraintDescriptionExtendable { get }
var top: ConstraintDescriptionExtendable { get }
var bottom: ConstraintDescriptionExtendable { get }
var right: ConstraintDescriptionExtendable { get }
var leading: ConstraintDescriptionExtendable { get }
var trailing: ConstraintDescriptionExtendable { get }
var width: ConstraintDescriptionExtendable { get }
var height: ConstraintDescriptionExtendable { get }
var centerX: ConstraintDescriptionExtendable { get }
var centerY: ConstraintDescriptionExtendable { get }
var baseline: ConstraintDescriptionExtendable { get }
#if os(iOS)
var firstBaseline: ConstraintDescriptionExtendable { get }
var leftMargin: ConstraintDescriptionExtendable { get }
var rightMargin: ConstraintDescriptionExtendable { get }
var topMargin: ConstraintDescriptionExtendable { get }
var bottomMargin: ConstraintDescriptionExtendable { get }
var leadingMargin: ConstraintDescriptionExtendable { get }
var trailingMargin: ConstraintDescriptionExtendable { get }
var centerXWithinMargins: ConstraintDescriptionExtendable { get }
var centerYWithinMargins: ConstraintDescriptionExtendable { get }
#endif
}
/**
Used to internally manage building constraint
*/
final internal class ConstraintDescription: ConstraintDescriptionExtendable, ConstraintDescriptionOffsetable, ConstraintDescriptionFinalizable {
internal var left: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.Left) }
internal var top: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.Top) }
internal var right: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.Right) }
internal var bottom: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.Bottom) }
internal var leading: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.Leading) }
internal var trailing: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.Trailing) }
internal var width: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.Width) }
internal var height: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.Height) }
internal var centerX: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.CenterX) }
internal var centerY: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.CenterY) }
internal var baseline: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.Baseline) }
#if os(iOS)
internal var firstBaseline: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.FirstBaseline) }
internal var leftMargin: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.LeftMargin) }
internal var rightMargin: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.RightMargin) }
internal var topMargin: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.TopMargin) }
internal var bottomMargin: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.BottomMargin) }
internal var leadingMargin: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.LeadingMargin) }
internal var trailingMargin: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.TrailingMargin) }
internal var centerXWithinMargins: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.CenterXWithinMargins) }
internal var centerYWithinMargins: ConstraintDescriptionExtendable { return self.addConstraint(ConstraintAttributes.CenterYWithinMargins) }
#endif
// MARK: initializer
init(fromItem: ConstraintItem) {
self.fromItem = fromItem
self.toItem = ConstraintItem(object: nil, attributes: ConstraintAttributes.None)
}
// MARK: equalTo
internal func equalTo(other: ConstraintItem) -> ConstraintDescriptionOffsetable {
return self.constrainTo(other, relation: .Equal)
}
internal func equalTo(other: View) -> ConstraintDescriptionOffsetable {
return self.constrainTo(other, relation: .Equal)
}
#if os(iOS)
internal func equalTo(other: UILayoutSupport) -> ConstraintDescriptionOffsetable {
return self.constrainTo(other, relation: .Equal)
}
#endif
internal func equalTo(other: Float) -> ConstraintDescriptionMultipliable {
return self.constrainTo(other, relation: .Equal)
}
internal func equalTo(other: Double) -> ConstraintDescriptionMultipliable {
return self.constrainTo(Float(other), relation: .Equal)
}
internal func equalTo(other: CGFloat) -> ConstraintDescriptionMultipliable {
return self.constrainTo(Float(other), relation: .Equal)
}
internal func equalTo(other: Int) -> ConstraintDescriptionMultipliable {
return self.constrainTo(Float(other), relation: .Equal)
}
internal func equalTo(other: UInt) -> ConstraintDescriptionMultipliable {
return self.constrainTo(Float(other), relation: .Equal)
}
internal func equalTo(other: CGSize) -> ConstraintDescriptionMultipliable {
return self.constrainTo(other, relation: .Equal)
}
internal func equalTo(other: CGPoint) -> ConstraintDescriptionMultipliable {
return self.constrainTo(other, relation: .Equal)
}
internal func equalTo(other: EdgeInsets) -> ConstraintDescriptionMultipliable {
return self.constrainTo(other, relation: .Equal)
}
// MARK: lessThanOrEqualTo
internal func lessThanOrEqualTo(other: ConstraintItem) -> ConstraintDescriptionOffsetable {
return self.constrainTo(other, relation: .LessThanOrEqualTo)
}
internal func lessThanOrEqualTo(other: View) -> ConstraintDescriptionOffsetable {
return self.constrainTo(other, relation: .LessThanOrEqualTo)
}
#if os(iOS)
internal func lessThanOrEqualTo(other: UILayoutSupport) -> ConstraintDescriptionOffsetable {
return self.constrainTo(other, relation: .LessThanOrEqualTo)
}
#endif
internal func lessThanOrEqualTo(other: Float) -> ConstraintDescriptionMultipliable {
return self.constrainTo(other, relation: .LessThanOrEqualTo)
}
internal func lessThanOrEqualTo(other: Double) -> ConstraintDescriptionMultipliable {
return self.constrainTo(Float(other), relation: .LessThanOrEqualTo)
}
internal func lessThanOrEqualTo(other: CGFloat) -> ConstraintDescriptionMultipliable {
return self.constrainTo(Float(other), relation: .LessThanOrEqualTo)
}
internal func lessThanOrEqualTo(other: Int) -> ConstraintDescriptionMultipliable {
return self.constrainTo(Float(other), relation: .LessThanOrEqualTo)
}
internal func lessThanOrEqualTo(other: UInt) -> ConstraintDescriptionMultipliable {
return self.constrainTo(Float(other), relation: .LessThanOrEqualTo)
}
internal func lessThanOrEqualTo(other: CGSize) -> ConstraintDescriptionMultipliable {
return self.constrainTo(other, relation: .LessThanOrEqualTo)
}
internal func lessThanOrEqualTo(other: CGPoint) -> ConstraintDescriptionMultipliable {
return self.constrainTo(other, relation: .LessThanOrEqualTo)
}
internal func lessThanOrEqualTo(other: EdgeInsets) -> ConstraintDescriptionMultipliable {
return self.constrainTo(other, relation: .LessThanOrEqualTo)
}
// MARK: greaterThanOrEqualTo
internal func greaterThanOrEqualTo(other: ConstraintItem) -> ConstraintDescriptionOffsetable {
return self.constrainTo(other, relation: .GreaterThanOrEqualTo)
}
internal func greaterThanOrEqualTo(other: View) -> ConstraintDescriptionOffsetable {
return self.constrainTo(other, relation: .GreaterThanOrEqualTo)
}
#if os(iOS)
internal func greaterThanOrEqualTo(other: UILayoutSupport) -> ConstraintDescriptionOffsetable {
return self.constrainTo(other, relation: .GreaterThanOrEqualTo)
}
#endif
internal func greaterThanOrEqualTo(other: Float) -> ConstraintDescriptionMultipliable {
return self.constrainTo(other, relation: .GreaterThanOrEqualTo)
}
internal func greaterThanOrEqualTo(other: Double) -> ConstraintDescriptionMultipliable {
return self.constrainTo(Float(other), relation: .GreaterThanOrEqualTo)
}
internal func greaterThanOrEqualTo(other: CGFloat) -> ConstraintDescriptionMultipliable {
return self.constrainTo(Float(other), relation: .GreaterThanOrEqualTo)
}
internal func greaterThanOrEqualTo(other: Int) -> ConstraintDescriptionMultipliable {
return self.constrainTo(Float(other), relation: .GreaterThanOrEqualTo)
}
internal func greaterThanOrEqualTo(other: UInt) -> ConstraintDescriptionMultipliable {
return self.constrainTo(Float(other), relation: .GreaterThanOrEqualTo)
}
internal func greaterThanOrEqualTo(other: CGSize) -> ConstraintDescriptionMultipliable {
return self.constrainTo(other, relation: .GreaterThanOrEqualTo)
}
internal func greaterThanOrEqualTo(other: CGPoint) -> ConstraintDescriptionMultipliable {
return self.constrainTo(other, relation: .GreaterThanOrEqualTo)
}
internal func greaterThanOrEqualTo(other: EdgeInsets) -> ConstraintDescriptionMultipliable {
return self.constrainTo(other, relation: .GreaterThanOrEqualTo)
}
// MARK: multiplier
internal func multipliedBy(amount: Float) -> ConstraintDescriptionPriortizable {
self.multiplier = amount
return self
}
internal func multipliedBy(amount: Double) -> ConstraintDescriptionPriortizable {
return self.multipliedBy(Float(amount))
}
internal func multipliedBy(amount: CGFloat) -> ConstraintDescriptionPriortizable {
return self.multipliedBy(Float(amount))
}
internal func multipliedBy(amount: Int) -> ConstraintDescriptionPriortizable {
return self.multipliedBy(Float(amount))
}
internal func multipliedBy(amount: UInt) -> ConstraintDescriptionPriortizable {
return self.multipliedBy(Float(amount))
}
internal func dividedBy(amount: Float) -> ConstraintDescriptionPriortizable {
self.multiplier = 1.0 / amount;
return self
}
internal func dividedBy(amount: Double) -> ConstraintDescriptionPriortizable {
return self.dividedBy(Float(amount))
}
internal func dividedBy(amount: CGFloat) -> ConstraintDescriptionPriortizable {
return self.dividedBy(Float(amount))
}
internal func dividedBy(amount: Int) -> ConstraintDescriptionPriortizable {
return self.dividedBy(Float(amount))
}
internal func dividedBy(amount: UInt) -> ConstraintDescriptionPriortizable {
return self.dividedBy(Float(amount))
}
// MARK: priority
internal func priority(priority: Float) -> ConstraintDescriptionFinalizable {
self.priority = priority
return self
}
internal func priority(priority: Double) -> ConstraintDescriptionFinalizable {
return self.priority(Float(priority))
}
internal func priority(priority: CGFloat) -> ConstraintDescriptionFinalizable {
return self.priority(Float(priority))
}
func priority(priority: UInt) -> ConstraintDescriptionFinalizable {
return self.priority(Float(priority))
}
internal func priority(priority: Int) -> ConstraintDescriptionFinalizable {
return self.priority(Float(priority))
}
internal func priorityRequired() -> ConstraintDescriptionFinalizable {
return self.priority(1000.0)
}
internal func priorityHigh() -> ConstraintDescriptionFinalizable {
return self.priority(750.0)
}
internal func priorityMedium() -> ConstraintDescriptionFinalizable {
#if os(iOS)
return self.priority(500.0)
#else
return self.priority(501.0)
#endif
}
internal func priorityLow() -> ConstraintDescriptionFinalizable {
return self.priority(250.0)
}
// MARK: offset
internal func offset(amount: Float) -> ConstraintDescriptionMultipliable {
self.constant = amount
return self
}
internal func offset(amount: Double) -> ConstraintDescriptionMultipliable {
return self.offset(Float(amount))
}
internal func offset(amount: CGFloat) -> ConstraintDescriptionMultipliable {
return self.offset(Float(amount))
}
internal func offset(amount: Int) -> ConstraintDescriptionMultipliable {
return self.offset(Float(amount))
}
internal func offset(amount: UInt) -> ConstraintDescriptionMultipliable {
return self.offset(Float(amount))
}
internal func offset(amount: CGPoint) -> ConstraintDescriptionMultipliable {
self.constant = amount
return self
}
internal func offset(amount: CGSize) -> ConstraintDescriptionMultipliable {
self.constant = amount
return self
}
internal func offset(amount: EdgeInsets) -> ConstraintDescriptionMultipliable {
self.constant = amount
return self
}
// MARK: insets
internal func insets(amount: EdgeInsets) -> ConstraintDescriptionMultipliable {
self.constant = EdgeInsets(top: amount.top, left: amount.left, bottom: -amount.bottom, right: -amount.right)
return self
}
// MARK: Constraint
internal var constraint: Constraint {
if self.createdConstraint == nil {
if self.relation == nil {
fatalError("Attempting to create a constraint from a ConstraintDescription before it has been fully chained.")
}
self.createdConstraint = Constraint(
fromItem: self.fromItem,
toItem: self.toItem,
relation: self.relation!,
constant: self.constant,
multiplier: self.multiplier,
priority: self.priority)
}
return self.createdConstraint!
}
// MARK: Private
private let fromItem: ConstraintItem
private var toItem: ConstraintItem {
willSet {
if self.createdConstraint != nil {
fatalError("Attempting to modify a ConstraintDescription after it’s constraint has been created.")
}
}
}
private var relation: ConstraintRelation? {
willSet {
if self.createdConstraint != nil {
fatalError("Attempting to modify a ConstraintDescription after it’s constraint has been created.")
}
}
}
private var constant: Any = Float(0.0) {
willSet {
if self.createdConstraint != nil {
fatalError("Attempting to modify a ConstraintDescription after it’s constraint has been created.")
}
}
}
private var multiplier: Float = 1.0 {
willSet {
if self.createdConstraint != nil {
fatalError("Attempting to modify a ConstraintDescription after it’s constraint has been created.")
}
}
}
private var priority: Float = 1000.0 {
willSet {
if self.createdConstraint != nil {
fatalError("Attempting to modify a ConstraintDescription after it’s constraint has been created.")
}
}
}
private var createdConstraint: Constraint? = nil
private func addConstraint(attributes: ConstraintAttributes) -> ConstraintDescription {
if self.relation == nil {
self.fromItem.attributes += attributes
}
return self
}
private func constrainTo(other: ConstraintItem, relation: ConstraintRelation) -> ConstraintDescription {
if other.attributes != ConstraintAttributes.None {
let toLayoutAttributes = other.attributes.layoutAttributes
if toLayoutAttributes.count > 1 {
let fromLayoutAttributes = self.fromItem.attributes.layoutAttributes
if toLayoutAttributes != fromLayoutAttributes {
NSException(name: "Invalid Constraint", reason: "Cannot constrain to multiple non identical attributes", userInfo: nil).raise()
return self
}
other.attributes = ConstraintAttributes.None
}
}
self.toItem = other
self.relation = relation
return self
}
private func constrainTo(other: View, relation: ConstraintRelation) -> ConstraintDescription {
return constrainTo(ConstraintItem(object: other, attributes: ConstraintAttributes.None), relation: relation)
}
#if os(iOS)
private func constrainTo(other: UILayoutSupport, relation: ConstraintRelation) -> ConstraintDescription {
return constrainTo(ConstraintItem(object: other, attributes: ConstraintAttributes.None), relation: relation)
}
#endif
private func constrainTo(other: Float, relation: ConstraintRelation) -> ConstraintDescription {
self.constant = other
return constrainTo(ConstraintItem(object: nil, attributes: ConstraintAttributes.None), relation: relation)
}
private func constrainTo(other: Double, relation: ConstraintRelation) -> ConstraintDescription {
self.constant = other
return constrainTo(ConstraintItem(object: nil, attributes: ConstraintAttributes.None), relation: relation)
}
private func constrainTo(other: CGSize, relation: ConstraintRelation) -> ConstraintDescription {
self.constant = other
return constrainTo(ConstraintItem(object: nil, attributes: ConstraintAttributes.None), relation: relation)
}
private func constrainTo(other: CGPoint, relation: ConstraintRelation) -> ConstraintDescription {
self.constant = other
return constrainTo(ConstraintItem(object: nil, attributes: ConstraintAttributes.None), relation: relation)
}
private func constrainTo(other: EdgeInsets, relation: ConstraintRelation) -> ConstraintDescription {
self.constant = other
return constrainTo(ConstraintItem(object: nil, attributes: ConstraintAttributes.None), relation: relation)
}
}

4
Source/ConstraintItem.swift
View File

@ -28,7 +28,7 @@ import AppKit
#endif
/**
* ConstraintItem is a class that is used while building constraints.
Used to assist in building a constraint
*/
final public class ConstraintItem {
@ -45,9 +45,11 @@ final public class ConstraintItem {
}
#if os(iOS)
internal var layoutSupport: UILayoutSupport? {
return self.object as? UILayoutSupport
}
#endif
}

144
Source/ConstraintMaker.swift
View File

@ -28,95 +28,155 @@ import AppKit
#endif
/**
* ConstraintMaker is the maker in snap that gets all constraints kickstarted
Used to make constraints
*/
final public class ConstraintMaker {
public var left: ConstraintBuilderExtendable { return self.addConstraint(ConstraintAttributes.Left) }
public var top: ConstraintBuilderExtendable { return self.addConstraint(ConstraintAttributes.Top) }
public var right: ConstraintBuilderExtendable { return self.addConstraint(ConstraintAttributes.Right) }
public var bottom: ConstraintBuilderExtendable { return self.addConstraint(ConstraintAttributes.Bottom) }
public var leading: ConstraintBuilderExtendable { return self.addConstraint(ConstraintAttributes.Leading) }
public var trailing: ConstraintBuilderExtendable { return self.addConstraint(ConstraintAttributes.Trailing) }
public var width: ConstraintBuilderExtendable { return self.addConstraint(ConstraintAttributes.Width) }
public var height: ConstraintBuilderExtendable { return self.addConstraint(ConstraintAttributes.Height) }
public var centerX: ConstraintBuilderExtendable { return self.addConstraint(ConstraintAttributes.CenterX) }
public var centerY: ConstraintBuilderExtendable { return self.addConstraint(ConstraintAttributes.CenterY) }
public var baseline: ConstraintBuilderExtendable { return self.addConstraint(ConstraintAttributes.Baseline) }
/// left edge
public var left: ConstraintDescriptionExtendable { return self.makeConstraintDescription(ConstraintAttributes.Left) }
/// top edge
public var top: ConstraintDescriptionExtendable { return self.makeConstraintDescription(ConstraintAttributes.Top) }
/// right edge
public var right: ConstraintDescriptionExtendable { return self.makeConstraintDescription(ConstraintAttributes.Right) }
/// bottom edge
public var bottom: ConstraintDescriptionExtendable { return self.makeConstraintDescription(ConstraintAttributes.Bottom) }
/// leading edge
public var leading: ConstraintDescriptionExtendable { return self.makeConstraintDescription(ConstraintAttributes.Leading) }
/// trailing edge
public var trailing: ConstraintDescriptionExtendable { return self.makeConstraintDescription(ConstraintAttributes.Trailing) }
/// width dimension
public var width: ConstraintDescriptionExtendable { return self.makeConstraintDescription(ConstraintAttributes.Width) }
/// height dimension
public var height: ConstraintDescriptionExtendable { return self.makeConstraintDescription(ConstraintAttributes.Height) }
/// centerX dimension
public var centerX: ConstraintDescriptionExtendable { return self.makeConstraintDescription(ConstraintAttributes.CenterX) }
/// centerY dimension
public var centerY: ConstraintDescriptionExtendable { return self.makeConstraintDescription(ConstraintAttributes.CenterY) }
/// baseline position
public var baseline: ConstraintDescriptionExtendable { return self.makeConstraintDescription(ConstraintAttributes.Baseline) }
#if os(iOS)
public var firstBaseline: ConstraintBuilderExtendable { return self.addConstraint(ConstraintAttributes.FirstBaseline) }
public var leftMargin: ConstraintBuilderExtendable { return self.addConstraint(ConstraintAttributes.LeftMargin) }
public var rightMargin: ConstraintBuilderExtendable { return self.addConstraint(ConstraintAttributes.RightMargin) }
public var topMargin: ConstraintBuilderExtendable { return self.addConstraint(ConstraintAttributes.TopMargin) }
public var bottomMargin: ConstraintBuilderExtendable { return self.addConstraint(ConstraintAttributes.BottomMargin) }
public var leadingMargin: ConstraintBuilderExtendable { return self.addConstraint(ConstraintAttributes.LeadingMargin) }
public var trailingMargin: ConstraintBuilderExtendable { return self.addConstraint(ConstraintAttributes.TrailingMargin) }
public var centerXWithinMargins: ConstraintBuilderExtendable { return self.addConstraint(ConstraintAttributes.CenterXWithinMargins) }
public var centerYWithinMargins: ConstraintBuilderExtendable { return self.addConstraint(ConstraintAttributes.CenterYWithinMargins) }
/// firse baseline position
public var firstBaseline: ConstraintDescriptionExtendable { return self.makeConstraintDescription(ConstraintAttributes.FirstBaseline) }
/// left margin
public var leftMargin: ConstraintDescriptionExtendable { return self.makeConstraintDescription(ConstraintAttributes.LeftMargin) }
/// right margin
public var rightMargin: ConstraintDescriptionExtendable { return self.makeConstraintDescription(ConstraintAttributes.RightMargin) }
/// top margin
public var topMargin: ConstraintDescriptionExtendable { return self.makeConstraintDescription(ConstraintAttributes.TopMargin) }
/// bottom margin
public var bottomMargin: ConstraintDescriptionExtendable { return self.makeConstraintDescription(ConstraintAttributes.BottomMargin) }
/// leading margin
public var leadingMargin: ConstraintDescriptionExtendable { return self.makeConstraintDescription(ConstraintAttributes.LeadingMargin) }
/// trailing margin
public var trailingMargin: ConstraintDescriptionExtendable { return self.makeConstraintDescription(ConstraintAttributes.TrailingMargin) }
/// centerX within margins
public var centerXWithinMargins: ConstraintDescriptionExtendable { return self.makeConstraintDescription(ConstraintAttributes.CenterXWithinMargins) }
/// centerY within margins
public var centerYWithinMargins: ConstraintDescriptionExtendable { return self.makeConstraintDescription(ConstraintAttributes.CenterYWithinMargins) }
#endif
public var edges: ConstraintBuilderExtendable { return self.addConstraint(ConstraintAttributes.Edges) }
public var size: ConstraintBuilderExtendable { return self.addConstraint(ConstraintAttributes.Size) }
public var center: ConstraintBuilderExtendable { return self.addConstraint(ConstraintAttributes.Center) }
/// top + left + bottom + right edges
public var edges: ConstraintDescriptionExtendable { return self.makeConstraintDescription(ConstraintAttributes.Edges) }
init(view: View) {
/// width + height dimensions
public var size: ConstraintDescriptionExtendable { return self.makeConstraintDescription(ConstraintAttributes.Size) }
// centerX + centerY positions
public var center: ConstraintDescriptionExtendable { return self.makeConstraintDescription(ConstraintAttributes.Center) }
#if os(iOS)
// top + left + bottom + right margins
public var snp_margins: ConstraintDescriptionExtendable { return self.makeConstraintDescription(ConstraintAttributes.Margins) }
// centerX + centerY within margins
public var snp_centerWithinMargins: ConstraintDescriptionExtendable { return self.makeConstraintDescription(ConstraintAttributes.CenterWithinMargins) }
#endif
internal init(view: View) {
self.view = view
}
internal weak var view: View?
internal var constraints = [ConstraintBuilder]()
internal var constraintDescriptions = [ConstraintDescription]()
internal func addConstraint(attributes: ConstraintAttributes) -> ConstraintBuilder {
internal func makeConstraintDescription(attributes: ConstraintAttributes) -> ConstraintDescription {
let item = ConstraintItem(object: self.view, attributes: attributes)
let constraint = ConstraintBuilder(fromItem: item)
self.constraints.append(constraint)
return constraint
let constraintDescription = ConstraintDescription(fromItem: item)
self.constraintDescriptions.append(constraintDescription)
return constraintDescription
}
internal class func prepareConstraints(view: View, @noescape block: (make: ConstraintMaker) -> Void) -> [ConstraintBuilder] {
internal class func prepareConstraints(view: View, @noescape closure: (make: ConstraintMaker) -> Void) -> [Constraint] {
let maker = ConstraintMaker(view: view)
block(make: maker)
return maker.constraints
closure(make: maker)
return maker.constraintDescriptions.map { $0.constraint }
}
internal class func makeConstraints(view: View, @noescape block: (make: ConstraintMaker) -> Void) {
internal class func makeConstraints(view: View, @noescape closure: (make: ConstraintMaker) -> Void) {
#if os(iOS)
view.setTranslatesAutoresizingMaskIntoConstraints(false)
#else
view.translatesAutoresizingMaskIntoConstraints = false
#endif
let maker = ConstraintMaker(view: view)
block(make: maker)
for constraint in maker.constraints {
closure(make: maker)
let constraints = maker.constraintDescriptions.map { $0.constraint }
for constraint in constraints {
constraint.installOnView(updateExisting: false)
}
}
internal class func remakeConstraints(view: View, @noescape block: (make: ConstraintMaker) -> Void) {
internal class func remakeConstraints(view: View, @noescape closure: (make: ConstraintMaker) -> Void) {
#if os(iOS)
view.setTranslatesAutoresizingMaskIntoConstraints(false)
#else
view.translatesAutoresizingMaskIntoConstraints = false
#endif
let maker = ConstraintMaker(view: view)
block(make: maker)
closure(make: maker)
self.removeConstraints(view)
for constraint in maker.constraints {
let constraints = maker.constraintDescriptions.map { $0.constraint }
for constraint in constraints {
constraint.installOnView(updateExisting: false)
}
}
internal class func updateConstraints(view: View, @noescape block: (make: ConstraintMaker) -> Void) {
internal class func updateConstraints(view: View, @noescape closure: (make: ConstraintMaker) -> Void) {
#if os(iOS)
view.setTranslatesAutoresizingMaskIntoConstraints(false)
#else
view.translatesAutoresizingMaskIntoConstraints = false
#endif
let maker = ConstraintMaker(view: view)
block(make: maker)
closure(make: maker)
for constraint in maker.constraints {
let constraints = maker.constraintDescriptions.map { $0.constraint }
for constraint in constraints {
constraint.installOnView(updateExisting: true)
}
}

2
Source/ConstraintRelation.swift
View File

@ -28,7 +28,7 @@ import AppKit
#endif
/**
* ConstraintRelation is an Int enum that maps to NSLayoutRelation.
Used to define `NSLayoutRelation`
*/
internal enum ConstraintRelation: Int {
case Equal = 1, LessThanOrEqualTo, GreaterThanOrEqualTo

4
Source/Debugging.swift
View File

@ -28,7 +28,7 @@ import AppKit
#endif
/**
* View extension that exposes snp_label debugging api
Used to allow adding a snp_label to a View for debugging purposes
*/
public extension View {
@ -44,7 +44,7 @@ public extension View {
}
/**
* LayoutConstraint extension that exposes snp_label debugging api
Used to allow adding a snp_label to a LayoutConstraint for debugging purposes
*/
public extension LayoutConstraint {

2
Source/EdgeInsets.swift
View File

@ -31,7 +31,7 @@ public let EdgeInsetsZero = EdgeInsets(top: 0, left: 0, bottom: 0, right: 0)
#else
import AppKit
public struct EdgeInsets {
public var top: CGFloat // specify amount to inset (positive) for each of the edges. values can be negative to 'outset'
public var top: CGFloat
public var left: CGFloat
public var bottom: CGFloat
public var right: CGFloat

8
Source/LayoutConstraint.swift
View File

@ -28,13 +28,15 @@ import AppKit
#endif
/**
* LayoutConstraint is a subclass of NSLayoutConstraint to assist Snap and also provide better debugging
Used to add extra information to the actual `NSLayoutConstraint`'s that will UIKit/AppKit will utilize
*/
final public class LayoutConstraint: NSLayoutConstraint {
internal var snp_constraint: ConstraintBuilder? = nil
internal var snp_constraint: Constraint? = nil
}
public func ==(left: LayoutConstraint, right: LayoutConstraint) -> Bool {
internal func ==(left: LayoutConstraint, right: LayoutConstraint) -> Bool {
if left.firstItem !== right.firstItem {
return false
}

7
Source/Snap.swift
View File

@ -23,17 +23,18 @@
#if os(iOS)
import UIKit
typealias InterfaceLayoutDirection = UIUserInterfaceLayoutDirection
public typealias InterfaceLayoutDirection = UIUserInterfaceLayoutDirection
#else
import AppKit
typealias InterfaceLayoutDirection = NSUserInterfaceLayoutDirection
public typealias InterfaceLayoutDirection = NSUserInterfaceLayoutDirection
#endif
/**
* Config that can be used to configure Snap
Used to configure different parts of Snap
*/
public struct Config {
/// The interface layout direction
public static var interfaceLayoutDirection = InterfaceLayoutDirection.LeftToRight
}

105
Source/View+Snap.swift
View File

@ -30,69 +30,140 @@ public typealias View = NSView
#endif
/**
* View extension that exposes primary api
Used to expose public API on views
*/
public extension View {
// normal
/// left edge
final public var snp_left: ConstraintItem { return ConstraintItem(object: self, attributes: ConstraintAttributes.Left) }
/// top edge
final public var snp_top: ConstraintItem { return ConstraintItem(object: self, attributes: ConstraintAttributes.Top) }
/// right edge
final public var snp_right: ConstraintItem { return ConstraintItem(object: self, attributes: ConstraintAttributes.Right) }
/// bottom edge
final public var snp_bottom: ConstraintItem { return ConstraintItem(object: self, attributes: ConstraintAttributes.Bottom) }
/// leading edge
final public var snp_leading: ConstraintItem { return ConstraintItem(object: self, attributes: ConstraintAttributes.Leading) }
/// trailing edge
final public var snp_trailing: ConstraintItem { return ConstraintItem(object: self, attributes: ConstraintAttributes.Trailing) }
/// width dimension
final public var snp_width: ConstraintItem { return ConstraintItem(object: self, attributes: ConstraintAttributes.Width) }
/// height dimension
final public var snp_height: ConstraintItem { return ConstraintItem(object: self, attributes: ConstraintAttributes.Height) }
/// centerX position
final public var snp_centerX: ConstraintItem { return ConstraintItem(object: self, attributes: ConstraintAttributes.CenterX) }
/// centerY position
final public var snp_centerY: ConstraintItem { return ConstraintItem(object: self, attributes: ConstraintAttributes.CenterY) }
/// baseline position
final public var snp_baseline: ConstraintItem { return ConstraintItem(object: self, attributes: ConstraintAttributes.Baseline) }
#if os(iOS)
/// first baseline position
final public var snp_firstBaseline: ConstraintItem { return ConstraintItem(object: self, attributes: ConstraintAttributes.FirstBaseline) }
/// left margin
final public var snp_leftMargin: ConstraintItem { return ConstraintItem(object: self, attributes: ConstraintAttributes.LeftMargin) }
/// right margin
final public var snp_rightMargin: ConstraintItem { return ConstraintItem(object: self, attributes: ConstraintAttributes.RightMargin) }
/// top margin
final public var snp_topMargin: ConstraintItem { return ConstraintItem(object: self, attributes: ConstraintAttributes.TopMargin) }
/// bottom margin
final public var snp_bottomMargin: ConstraintItem { return ConstraintItem(object: self, attributes: ConstraintAttributes.BottomMargin) }
/// leading margin
final public var snp_leadingMargin: ConstraintItem { return ConstraintItem(object: self, attributes: ConstraintAttributes.LeadingMargin) }
/// trailing margin
final public var snp_trailingMargin: ConstraintItem { return ConstraintItem(object: self, attributes: ConstraintAttributes.TrailingMargin) }
final public var snp_centerXWithinMargin: ConstraintItem { return ConstraintItem(object: self, attributes: ConstraintAttributes.CenterXWithinMargins) }
final public var snp_centerYWithinMargin: ConstraintItem { return ConstraintItem(object: self, attributes: ConstraintAttributes.CenterYWithinMargins) }
/// centerX within margins
final public var snp_centerXWithinMargins: ConstraintItem { return ConstraintItem(object: self, attributes: ConstraintAttributes.CenterXWithinMargins) }
/// centerY within margins
final public var snp_centerYWithinMargins: ConstraintItem { return ConstraintItem(object: self, attributes: ConstraintAttributes.CenterYWithinMargins) }
#endif
// aggregates
// top + left + bottom + right edges
final public var snp_edges: ConstraintItem { return ConstraintItem(object: self, attributes: ConstraintAttributes.Edges) }
// width + height dimensions
final public var snp_size: ConstraintItem { return ConstraintItem(object: self, attributes: ConstraintAttributes.Size) }
// centerX + centerY positions
final public var snp_center: ConstraintItem { return ConstraintItem(object: self, attributes: ConstraintAttributes.Center) }
#if os(iOS)
// top + left + bottom + right margins
final public var snp_margins: ConstraintItem { return ConstraintItem(object: self, attributes: ConstraintAttributes.Margins) }
// centerX + centerY within margins
final public var snp_centerWithinMargins: ConstraintItem { return ConstraintItem(object: self, attributes: ConstraintAttributes.CenterWithinMargins) }
#endif
final public func snp_prepareConstraints(@noescape block: (make: ConstraintMaker) -> Void) -> [Constraint] {
return ConstraintMaker.prepareConstraints(self, block: block).map { return $0 as Constraint }
/**
Prepares constraints with a `ConstraintMaker` and returns the made constraints but does not install them.
:param: closure that will be passed the `ConstraintMaker` to make the constraints with
:returns: the constraints made
*/
final public func snp_prepareConstraints(@noescape closure: (make: ConstraintMaker) -> Void) -> [Constraint] {
return ConstraintMaker.prepareConstraints(self, closure: closure)
}
final public func snp_makeConstraints(@noescape block: (make: ConstraintMaker) -> Void) {
ConstraintMaker.makeConstraints(self, block: block)
/**
Makes constraints with a `ConstraintMaker` and installs them along side any previous made constraints.
:param: closure that will be passed the `ConstraintMaker` to make the constraints with
*/
final public func snp_makeConstraints(@noescape closure: (make: ConstraintMaker) -> Void) -> Void {
ConstraintMaker.makeConstraints(self, closure: closure)
}
final public func snp_updateConstraints(@noescape block: (make: ConstraintMaker) -> Void) {
ConstraintMaker.updateConstraints(self, block: block)
/**
Updates constraints with a `ConstraintMaker` that will replace existing constraints that match and install new ones.
For constraints to match only the constant can be updated.
:param: closure that will be passed the `ConstraintMaker` to update the constraints with
*/
final public func snp_updateConstraints(@noescape closure: (make: ConstraintMaker) -> Void) -> Void {
ConstraintMaker.updateConstraints(self, closure: closure)
}
final public func snp_remakeConstraints(@noescape block: (make: ConstraintMaker) -> Void) {
ConstraintMaker.remakeConstraints(self, block: block)
/**
Remakes constraints with a `ConstraintMaker` that will first remove all previously made constraints and make and install new ones.
:param: closure that will be passed the `ConstraintMaker` to remake the constraints with
*/
final public func snp_remakeConstraints(@noescape closure: (make: ConstraintMaker) -> Void) -> Void {
ConstraintMaker.remakeConstraints(self, closure: closure)
}
/**
Removes all previously made constraints.
*/
final public func snp_removeConstraints() {
ConstraintMaker.removeConstraints(self)
}
// internal
final internal var snp_installedLayoutConstraints: [LayoutConstraint] {
get {
if let constraints = objc_getAssociatedObject(self, &installedLayoutConstraintsKey) as? [LayoutConstraint] {

1
Tests/Tests.swift
View File

@ -156,6 +156,7 @@ class SnapTests: XCTestCase {
return
}
XCTAssertEqual(self.container.snp_constraints.count, 0, "Should have 0 constraints installed")
for constraint in constraints {