88 lines
2.9 KiB
Swift
88 lines
2.9 KiB
Swift
// Copyright 2020 Tokamak contributors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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// Created by Carson Katri on 7/3/20.
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//
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public struct DisclosureGroup<Label, Content>: View
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where Label: View, Content: View {
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@State var isExpanded: Bool = false
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let isExpandedBinding: Binding<Bool>?
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@Environment(\._outlineGroupStyle) var style
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let label: Label
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let content: () -> Content
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public init(@ViewBuilder content: @escaping () -> Content,
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@ViewBuilder label: () -> Label) {
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isExpandedBinding = nil
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self.label = label()
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self.content = content
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}
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public init(isExpanded: Binding<Bool>,
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@ViewBuilder content: @escaping () -> Content,
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@ViewBuilder label: () -> Label) {
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isExpandedBinding = isExpanded
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self.label = label()
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self.content = content
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}
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public var body: Never {
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neverBody("DisclosureGroup")
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}
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}
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extension DisclosureGroup where Label == Text {
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// FIXME: Implement LocalizedStringKey
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// public init(_ titleKey: LocalizedStringKey,
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// @ViewBuilder content: @escaping () -> Content)
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// public init(_ titleKey: SwiftUI.LocalizedStringKey,
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// isExpanded: SwiftUI.Binding<Swift.Bool>,
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// @SwiftUI.ViewBuilder content: @escaping () -> Content)
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@_disfavoredOverload public init<S>(_ label: S,
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@ViewBuilder content: @escaping () -> Content)
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where S: StringProtocol {
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self.init(content: content, label: { Text(label) })
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}
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@_disfavoredOverload public init<S>(_ label: S,
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isExpanded: Binding<Bool>,
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@ViewBuilder content: @escaping () -> Content)
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where S: StringProtocol {
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self.init(isExpanded: isExpanded, content: content, label: { Text(label) })
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}
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}
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public struct _DisclosureGroupProxy<Label, Content>
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where Label: View, Content: View {
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public var subject: DisclosureGroup<Label, Content>
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public init(_ subject: DisclosureGroup<Label, Content>) { self.subject = subject }
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public var label: Label { subject.label }
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public var content: () -> Content { subject.content }
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public var style: _OutlineGroupStyle { subject.style }
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public var isExpanded: Bool {
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subject.isExpandedBinding?.wrappedValue ?? subject.isExpanded
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}
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public func toggleIsExpanded() {
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subject.isExpandedBinding?.wrappedValue.toggle()
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subject.isExpanded.toggle()
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}
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}
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