77 lines
3.0 KiB
Swift
77 lines
3.0 KiB
Swift
//
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// Copyright 2023 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 Combine
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import SwiftUI
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protocol WindowManagerDelegate: AnyObject {
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/// The window manager has configured its windows.
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func windowManagerDidConfigureWindows(_ windowManager: WindowManager)
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}
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@MainActor
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/// A window manager that supports switching between a main app window with an overlay and
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/// an alternate window to switch contexts whilst also preserving the main view hierarchy.
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class WindowManager {
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weak var delegate: WindowManagerDelegate?
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/// The app's main window (we only support a single scene).
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private(set) var mainWindow: UIWindow!
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/// Presented on top of the main window, to display e.g. user indicators.
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private(set) var overlayWindow: UIWindow!
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/// A secondary window that can be presented instead of the main/overlay window combo.
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private(set) var alternateWindow: UIWindow!
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/// Configures the window manager to operate on the supplied scene.
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func configure(with windowScene: UIWindowScene) {
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mainWindow = windowScene.keyWindow
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mainWindow.tintColor = .compound.textActionPrimary
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overlayWindow = UIWindow(windowScene: windowScene)
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overlayWindow.tintColor = .compound.textActionPrimary
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overlayWindow.backgroundColor = .clear
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// We don't support user interaction on our indicators so disable interaction, to pass
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// touches through to the main window. If this changes, there's another solution here:
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// https://www.fivestars.blog/articles/swiftui-windows/
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overlayWindow.isUserInteractionEnabled = false
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overlayWindow.isHidden = false
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alternateWindow = UIWindow(windowScene: windowScene)
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alternateWindow.tintColor = .compound.textActionPrimary
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delegate?.windowManagerDidConfigureWindows(self)
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}
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/// Shows the main and overlay window combo, hiding the alternate window.
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func switchToMain() {
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mainWindow.isHidden = false
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overlayWindow.isHidden = false
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alternateWindow.isHidden = true
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}
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/// Shows the alternate window, hiding the main and overlay combo.
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func switchToAlternate() {
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alternateWindow.isHidden = false
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overlayWindow.isHidden = true
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mainWindow.isHidden = true
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// We don't know what route the app will use when returning back
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// to the main window, so end any editing operation now to avoid
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// e.g. the keyboard being displayed on top of a call sheet.
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mainWindow.endEditing(true)
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}
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}
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