75d24c15
 yangbin
123
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
|
//
// 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 class ConstraintMaker {
public var left: ConstraintMakerExtendable {
return self.makeExtendableWithAttributes(.left)
}
public var top: ConstraintMakerExtendable {
return self.makeExtendableWithAttributes(.top)
}
public var bottom: ConstraintMakerExtendable {
return self.makeExtendableWithAttributes(.bottom)
}
public var right: ConstraintMakerExtendable {
return self.makeExtendableWithAttributes(.right)
}
public var leading: ConstraintMakerExtendable {
return self.makeExtendableWithAttributes(.leading)
}
public var trailing: ConstraintMakerExtendable {
return self.makeExtendableWithAttributes(.trailing)
}
public var width: ConstraintMakerExtendable {
return self.makeExtendableWithAttributes(.width)
}
public var height: ConstraintMakerExtendable {
return self.makeExtendableWithAttributes(.height)
}
public var centerX: ConstraintMakerExtendable {
return self.makeExtendableWithAttributes(.centerX)
}
public var centerY: ConstraintMakerExtendable {
return self.makeExtendableWithAttributes(.centerY)
}
@available(*, deprecated:3.0, message:"Use lastBaseline instead")
public var baseline: ConstraintMakerExtendable {
return self.makeExtendableWithAttributes(.lastBaseline)
}
public var lastBaseline: ConstraintMakerExtendable {
return self.makeExtendableWithAttributes(.lastBaseline)
}
@available(iOS 8.0, OSX 10.11, *)
public var firstBaseline: ConstraintMakerExtendable {
return self.makeExtendableWithAttributes(.firstBaseline)
}
@available(iOS 8.0, *)
public var leftMargin: ConstraintMakerExtendable {
return self.makeExtendableWithAttributes(.leftMargin)
}
@available(iOS 8.0, *)
public var rightMargin: ConstraintMakerExtendable {
return self.makeExtendableWithAttributes(.rightMargin)
}
@available(iOS 8.0, *)
public var topMargin: ConstraintMakerExtendable {
return self.makeExtendableWithAttributes(.topMargin)
}
@available(iOS 8.0, *)
public var bottomMargin: ConstraintMakerExtendable {
return self.makeExtendableWithAttributes(.bottomMargin)
}
@available(iOS 8.0, *)
public var leadingMargin: ConstraintMakerExtendable {
return self.makeExtendableWithAttributes(.leadingMargin)
}
@available(iOS 8.0, *)
public var trailingMargin: ConstraintMakerExtendable {
return self.makeExtendableWithAttributes(.trailingMargin)
}
@available(iOS 8.0, *)
public var centerXWithinMargins: ConstraintMakerExtendable {
return self.makeExtendableWithAttributes(.centerXWithinMargins)
}
@available(iOS 8.0, *)
public var centerYWithinMargins: ConstraintMakerExtendable {
return self.makeExtendableWithAttributes(.centerYWithinMargins)
}
public var edges: ConstraintMakerExtendable {
return self.makeExtendableWithAttributes(.edges)
}
public var size: ConstraintMakerExtendable {
return self.makeExtendableWithAttributes(.size)
}
public var center: ConstraintMakerExtendable {
return self.makeExtendableWithAttributes(.center)
}
@available(iOS 8.0, *)
public var margins: ConstraintMakerExtendable {
return self.makeExtendableWithAttributes(.margins)
}
@available(iOS 8.0, *)
public var centerWithinMargins: ConstraintMakerExtendable {
return self.makeExtendableWithAttributes(.centerWithinMargins)
}
private let item: LayoutConstraintItem
private var descriptions = [ConstraintDescription]()
internal init(item: LayoutConstraintItem) {
self.item = item
self.item.prepare()
}
internal func makeExtendableWithAttributes(_ attributes: ConstraintAttributes) -> ConstraintMakerExtendable {
let description = ConstraintDescription(item: self.item, attributes: attributes)
self.descriptions.append(description)
return ConstraintMakerExtendable(description)
}
internal static func prepareConstraints(item: LayoutConstraintItem, closure: (_ make: ConstraintMaker) -> Void) -> [Constraint] {
let maker = ConstraintMaker(item: item)
closure(maker)
var constraints: [Constraint] = []
for description in maker.descriptions {
guard let constraint = description.constraint else {
continue
}
constraints.append(constraint)
}
return constraints
}
internal static func makeConstraints(item: LayoutConstraintItem, closure: (_ make: ConstraintMaker) -> Void) {
let constraints = prepareConstraints(item: item, closure: closure)
for constraint in constraints {
constraint.activateIfNeeded(updatingExisting: false)
}
}
internal static func remakeConstraints(item: LayoutConstraintItem, closure: (_ make: ConstraintMaker) -> Void) {
self.removeConstraints(item: item)
self.makeConstraints(item: item, closure: closure)
}
internal static func updateConstraints(item: LayoutConstraintItem, closure: (_ make: ConstraintMaker) -> Void) {
guard item.constraints.count > 0 else {
self.makeConstraints(item: item, closure: closure)
return
}
let constraints = prepareConstraints(item: item, closure: closure)
for constraint in constraints {
constraint.activateIfNeeded(updatingExisting: true)
}
}
internal static func removeConstraints(item: LayoutConstraintItem) {
let constraints = item.constraints
for constraint in constraints {
constraint.deactivateIfNeeded()
}
}
}
|
