element-ios/RiotSwiftUI/Modules/Common/ActivityIndicator/ActivityIndicatorModifier.swift

// 
// Copyright 2021 New Vector Ltd
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//

import Foundation
import SwiftUI

/**
 A modifier for showing the activity indcator centered over a view.
 */
@available(iOS 14.0, *)
struct ActivityIndicatorModifier: ViewModifier {
    var show: Bool

    @ViewBuilder
    func body(content: Content) -> some View {
        if show {
            content
                .overlay(ActivityIndicator(), alignment: .center)
        } else {
            content
        }
    }
}

@available(iOS 14.0, *)
extension View {
    @available(iOS 14.0, *)
    func activityIndicator(show: Bool) -> some View {
        self.modifier(ActivityIndicatorModifier(show: show))
    }
}