131 lines
4.2 KiB
Swift
131 lines
4.2 KiB
Swift
//
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// Copyright 2022 New Vector Ltd
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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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import SwiftUI
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class NavigationRootCoordinator: ObservableObject, CoordinatorProtocol, CustomStringConvertible {
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@Published fileprivate var rootModule: NavigationModule? {
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didSet {
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if let oldValue {
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oldValue.tearDown()
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}
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if let rootModule {
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logPresentationChange("Set root", rootModule)
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rootModule.coordinator?.start()
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}
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}
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}
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/// The currently displayed coordinator
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var rootCoordinator: (any CoordinatorProtocol)? {
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rootModule?.coordinator
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}
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@Published fileprivate var sheetModule: NavigationModule? {
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didSet {
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if let oldValue {
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logPresentationChange("Remove sheet", oldValue)
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oldValue.tearDown()
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}
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if let sheetModule {
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logPresentationChange("Set sheet", sheetModule)
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sheetModule.coordinator?.start()
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}
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}
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}
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// The currently presented sheet coordinator
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// Sheets will be presented through the NavigationSplitCoordinator if provided
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var sheetCoordinator: (any CoordinatorProtocol)? {
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sheetModule?.coordinator
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}
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/// Sets or replaces the presented coordinator
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/// - Parameter coordinator: the coordinator to display
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func setRootCoordinator(_ coordinator: (any CoordinatorProtocol)?, animated: Bool = true, dismissalCallback: (() -> Void)? = nil) {
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var transaction = Transaction()
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transaction.disablesAnimations = !animated
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withTransaction(transaction) {
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guard let coordinator else {
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rootModule = nil
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return
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}
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rootModule = NavigationModule(coordinator, dismissalCallback: dismissalCallback)
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}
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}
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/// - dismissalCallback: called when the sheet has been dismissed, programatically or otherwise
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func setSheetCoordinator(_ coordinator: (any CoordinatorProtocol)?, animated: Bool = true, dismissalCallback: (() -> Void)? = nil) {
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guard let coordinator else {
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sheetModule = nil
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return
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}
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if sheetModule?.coordinator === coordinator {
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fatalError("Cannot use the same coordinator more than once")
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}
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var transaction = Transaction()
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transaction.disablesAnimations = !animated
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withTransaction(transaction) {
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sheetModule = NavigationModule(coordinator, dismissalCallback: dismissalCallback)
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}
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}
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// MARK: - CoordinatorProtocol
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func toPresentable() -> AnyView {
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AnyView(NavigationRootCoordinatorView(rootCoordinator: self))
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}
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// MARK: - CustomStringConvertible
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var description: String {
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if let rootCoordinator = rootModule?.coordinator {
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return "NavigationRootCoordinator(\(rootCoordinator)"
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} else {
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return "NavigationRootCoordinator(Empty)"
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}
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}
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// MARK: - Private
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private func logPresentationChange(_ change: String, _ module: NavigationModule) {
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if let coordinator = module.coordinator {
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MXLog.info("\(self) \(change): \(coordinator)")
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}
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}
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}
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private struct NavigationRootCoordinatorView: View {
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@ObservedObject var rootCoordinator: NavigationRootCoordinator
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var body: some View {
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ZStack {
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rootCoordinator.rootModule?.coordinator?.toPresentable()
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}
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.animation(.elementDefault, value: rootCoordinator.rootModule)
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.sheet(item: $rootCoordinator.sheetModule) { module in
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module.coordinator?.toPresentable()
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}
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}
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}
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