Files
ios-mail/Modules/App/Sources/UI/Views/ViewModifiers/SizeTransition.swift
T

67 lines
2.4 KiB
Swift

// Copyright (c) 2025 Proton Technologies AG
//
// This file is part of Proton Mail.
//
// Proton Mail is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Proton Mail is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Proton Mail. If not, see https://www.gnu.org/licenses/.
import SwiftUI
extension View {
public func sizeTransition(inProgress: Binding<Bool>) -> some View {
modifier(SizeTransitionObservingModifier(sizeTransitionInProgress: inProgress))
}
}
private struct SizeTransitionObservingModifier: ViewModifier {
let sizeTransitionInProgress: Binding<Bool>
func body(content: Content) -> some View {
content
.background(SizeTransitionObservingView(sizeTransitionInProgress: sizeTransitionInProgress))
}
}
private struct SizeTransitionObservingView: UIViewControllerRepresentable {
let sizeTransitionInProgress: Binding<Bool>
func makeUIViewController(context: Context) -> SizeTransitionObservingViewController {
.init(sizeTransitionInProgress: sizeTransitionInProgress)
}
func updateUIViewController(_ uiViewController: UIViewControllerType, context: Context) {}
}
private final class SizeTransitionObservingViewController: UIViewController {
private let sizeTransitionInProgress: Binding<Bool>
init(sizeTransitionInProgress: Binding<Bool>) {
self.sizeTransitionInProgress = sizeTransitionInProgress
super.init(nibName: nil, bundle: nil)
}
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
override func viewWillTransition(to size: CGSize, with coordinator: UIViewControllerTransitionCoordinator) {
super.viewWillTransition(to: size, with: coordinator)
sizeTransitionInProgress.wrappedValue = true
coordinator.animate(alongsideTransition: nil) { [sizeTransitionInProgress] _ in
sizeTransitionInProgress.wrappedValue = false
}
}
}