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-//
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-// Copyright © 2020 osy. All rights reserved.
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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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-
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-import SwiftUI
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-
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-// MARK: - View
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-
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-@available(macOS 11, *)
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-public struct ToolbarTabView: View {
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- let tabs: [AnyView]
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-
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- public init<Content: View>(@ViewBuilder content: () -> Content) {
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- let views = content()
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- self.tabs = [AnyView(views)]
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- }
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-
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- public init<C0: View, C1: View>(@ViewBuilder content: () -> TupleView<(C0, C1)>) {
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- let views = content().value
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- self.tabs = [AnyView(views.0), AnyView(views.1)]
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- }
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-
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- public init<C0: View, C1: View, C2: View>(@ViewBuilder content: () -> TupleView<(C0, C1, C2)>) {
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- let views = content().value
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- self.tabs = [AnyView(views.0), AnyView(views.1), AnyView(views.2)]
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- }
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-
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- public init<C0: View, C1: View, C2: View, C3: View>(@ViewBuilder content: () -> TupleView<(C0, C1, C2, C3)>) {
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- let views = content().value
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- self.tabs = [AnyView(views.0), AnyView(views.1), AnyView(views.2), AnyView(views.3)]
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- }
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-
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- public init<C0: View, C1: View, C2: View, C3: View, C4: View>(@ViewBuilder content: () -> TupleView<(C0, C1, C2, C3, C4)>) {
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- let views = content().value
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- self.tabs = [AnyView(views.0), AnyView(views.1), AnyView(views.2), AnyView(views.3), AnyView(views.4)]
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- }
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-
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- public init<C0: View, C1: View, C2: View, C3: View, C4: View, C5: View>(@ViewBuilder content: () -> TupleView<(C0, C1, C2, C3, C4, C5)>) {
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- let views = content().value
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- self.tabs = [AnyView(views.0), AnyView(views.1), AnyView(views.2), AnyView(views.3), AnyView(views.4), AnyView(views.5)]
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- }
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-
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- public init<C0: View, C1: View, C2: View, C3: View, C4: View, C5: View, C6: View>(@ViewBuilder content: () -> TupleView<(C0, C1, C2, C3, C4, C5, C6)>) {
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- let views = content().value
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- self.tabs = [AnyView(views.0), AnyView(views.1), AnyView(views.2), AnyView(views.3), AnyView(views.4), AnyView(views.5), AnyView(views.6)]
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- }
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-
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- public init<C0: View, C1: View, C2: View, C3: View, C4: View, C5: View, C6: View, C7: View>(@ViewBuilder content: () -> TupleView<(C0, C1, C2, C3, C4, C5, C6, C7)>) {
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- let views = content().value
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- self.tabs = [AnyView(views.0), AnyView(views.1), AnyView(views.2), AnyView(views.3), AnyView(views.4), AnyView(views.5), AnyView(views.6), AnyView(views.7)]
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- }
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-
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- public init<C0: View, C1: View, C2: View, C3: View, C4: View, C5: View, C6: View, C7: View, C8: View>(@ViewBuilder content: () -> TupleView<(C0, C1, C2, C3, C4, C5, C6, C7, C8)>) {
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- let views = content().value
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- self.tabs = [AnyView(views.0), AnyView(views.1), AnyView(views.2), AnyView(views.3), AnyView(views.4), AnyView(views.5), AnyView(views.6), AnyView(views.7), AnyView(views.8)]
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- }
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-
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- public init<C0: View, C1: View, C2: View, C3: View, C4: View, C5: View, C6: View, C7: View, C8: View, C9: View>(@ViewBuilder content: () -> TupleView<(C0, C1, C2, C3, C4, C5, C6, C7, C8, C9)>) {
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- let views = content().value
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- self.tabs = [AnyView(views.0), AnyView(views.1), AnyView(views.2), AnyView(views.3), AnyView(views.4), AnyView(views.5), AnyView(views.6), AnyView(views.7), AnyView(views.8), AnyView(views.9)]
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- }
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-
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- public var body: some View {
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- let nsTabs = tabs.map { (content) -> NSTabViewItem in
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- var tabViewItem: NSTabViewItem? = nil
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- let view = content.onPreferenceChange(ToolbarTabItemPreferenceKey.self) { (value: ToolbarTabItemPreference) in
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- guard let item = tabViewItem else {
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- logger.error("Failed to update \(value.label.localizedString) since item is nil!")
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- return
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- }
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- item.label = value.label.localizedString
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- if value.nsImage != nil {
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- item.image = value.nsImage!
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- }
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- if value.tooltip != nil {
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- item.toolTip = value.tooltip!.localizedString
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- }
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- }
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- tabViewItem = NSTabViewItem(viewController: NSHostingController(rootView: view))
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- tabViewItem!.label = "" // FIXME: bypass lazy loading of label
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- return tabViewItem!
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- }
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- return ToolbarTabViewController(tabViewItems: nsTabs)
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- }
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-}
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-
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-// MARK: - Tab Item Preference
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-
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-@available(macOS 11, *)
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-private struct ToolbarTabItemPreference : Equatable {
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- let label: LocalizedStringKey
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- let nsImage: NSImage?
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- let tooltip: LocalizedStringKey?
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-
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- static let none = ToolbarTabItemPreference(label: "", nsImage: nil, tooltip: nil)
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-
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- init(label: LocalizedStringKey, nsImage: NSImage?, tooltip: LocalizedStringKey?) {
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- self.label = label
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- self.nsImage = nsImage
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- self.tooltip = tooltip
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- }
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-
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- static func == (lhs: ToolbarTabItemPreference, rhs: ToolbarTabItemPreference) -> Bool {
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- lhs.label == rhs.label && lhs.nsImage == rhs.nsImage
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- }
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-}
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-
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-private struct ToolbarTabItemPreferenceKey: PreferenceKey {
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- static var defaultValue: ToolbarTabItemPreference = .none
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-
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- static func reduce(value: inout ToolbarTabItemPreference, nextValue: () -> ToolbarTabItemPreference) {
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- value = nextValue()
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- }
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-}
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-
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-// MARK: - Toolbar item modifier
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-
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-@available(macOS 11, *)
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-extension View {
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- func toolbarTabItem(_ label: LocalizedStringKey, nsImage: NSImage? = nil, tooltip: LocalizedStringKey? = nil) -> some View {
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- self.preference(key: ToolbarTabItemPreferenceKey.self, value: ToolbarTabItemPreference(label: label, nsImage: nsImage, tooltip: tooltip))
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- }
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-
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- func toolbarTabItem(_ label: LocalizedStringKey, systemImage: String, tooltip: LocalizedStringKey? = nil) -> some View {
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- self.preference(key: ToolbarTabItemPreferenceKey.self, value: ToolbarTabItemPreference(label: label, nsImage: NSImage(systemSymbolName: systemImage, accessibilityDescription: "\(tooltip ?? "")"), tooltip: tooltip))
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- }
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-}
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-
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-// MARK: - Preview
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-
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-@available(macOS 11, *)
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-struct ToolbarTabView_Previews: PreviewProvider {
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- static var previews: some View {
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- ToolbarTabView {
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- Text("The First Tab")
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- .toolbarTabItem("First", systemImage: "1.square.fill", tooltip: "First one")
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- Text("Another Tab")
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- .toolbarTabItem("Second", systemImage: "2.square.fill", tooltip: "Second one")
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- Text("The Last Tab")
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- .toolbarTabItem("Third", systemImage: "3.square.fill", tooltip: "Third one")
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- }
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- }
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-}
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osy