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//
// NCActivityIndicator.swift
// Nextcloud
//
// Created by Marino Faggiana on 11/08/22.
// Copyright © 2022 Marino Faggiana. All rights reserved.
//
// Author Marino Faggiana <marino.faggiana@nextcloud.com>
//
// This program 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.
//
// This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
//
import Foundation
import UIKit
class NCActivityIndicator: NSObject {
@objc static let shared: NCActivityIndicator = {
let instance = NCActivityIndicator()
return instance
}()
private var activityIndicator: UIActivityIndicatorView?
private var viewActivityIndicator: UIView?
private var viewBackgroundActivityIndicator: UIView?
@objc func startActivity(backgroundView: UIView?, style: UIActivityIndicatorView.Style) {
start(backgroundView: backgroundView, style: style)
}
func start(backgroundView: UIView? = nil, bottom: CGFloat? = nil, top: CGFloat? = nil, style: UIActivityIndicatorView.Style = .whiteLarge) {
if self.activityIndicator != nil { stop() }
DispatchQueue.main.async {
self.activityIndicator = UIActivityIndicatorView(style: style)
guard let activityIndicator = self.activityIndicator, self.viewBackgroundActivityIndicator == nil else { return }
activityIndicator.color = NCBrandColor.shared.label
activityIndicator.hidesWhenStopped = true
activityIndicator.translatesAutoresizingMaskIntoConstraints = false
var sizeActivityIndicator = activityIndicator.frame.height
if backgroundView == nil {
sizeActivityIndicator += 50
}
self.viewActivityIndicator = UIView(frame: CGRect(x: 0, y: 0, width: sizeActivityIndicator, height: sizeActivityIndicator))
self.viewActivityIndicator?.translatesAutoresizingMaskIntoConstraints = false
self.viewActivityIndicator?.layer.cornerRadius = 10
self.viewActivityIndicator?.layer.masksToBounds = true
self.viewActivityIndicator?.backgroundColor = .clear
#if !EXTENSION
if backgroundView == nil {
if let window = UIApplication.shared.keyWindow {
self.viewBackgroundActivityIndicator?.removeFromSuperview()
self.viewBackgroundActivityIndicator = NCViewActivityIndicator(frame: window.bounds)
window.addSubview(self.viewBackgroundActivityIndicator!)
self.viewBackgroundActivityIndicator?.autoresizingMask = [.flexibleWidth, .flexibleHeight]
self.viewBackgroundActivityIndicator?.backgroundColor = .clear
}
} else {
self.viewBackgroundActivityIndicator = backgroundView
}
#else
self.viewBackgroundActivityIndicator = backgroundView
#endif
// VIEW ACTIVITY INDICATOR
guard let viewActivityIndicator = self.viewActivityIndicator else { return }
viewActivityIndicator.addSubview(activityIndicator)
if backgroundView == nil {
let blurEffect = UIBlurEffect(style: .regular)
let blurEffectView = UIVisualEffectView(effect: blurEffect)
blurEffectView.frame = viewActivityIndicator.frame
viewActivityIndicator.insertSubview(blurEffectView, at: 0)
}
NSLayoutConstraint.activate([
viewActivityIndicator.widthAnchor.constraint(equalToConstant: sizeActivityIndicator),
viewActivityIndicator.heightAnchor.constraint(equalToConstant: sizeActivityIndicator),
activityIndicator.centerXAnchor.constraint(equalTo: viewActivityIndicator.centerXAnchor),
activityIndicator.centerYAnchor.constraint(equalTo: viewActivityIndicator.centerYAnchor)
])
// BACKGROUD VIEW ACTIVITY INDICATOR
guard let viewBackgroundActivityIndicator = self.viewBackgroundActivityIndicator else { return }
viewBackgroundActivityIndicator.addSubview(viewActivityIndicator)
if let constant = bottom {
viewActivityIndicator.bottomAnchor.constraint(equalTo: viewBackgroundActivityIndicator.bottomAnchor, constant: constant).isActive = true
} else if let constant = top {
viewActivityIndicator.topAnchor.constraint(equalTo: viewBackgroundActivityIndicator.topAnchor, constant: constant).isActive = true
} else {
viewActivityIndicator.centerYAnchor.constraint(equalTo: viewBackgroundActivityIndicator.centerYAnchor).isActive = true
}
viewActivityIndicator.centerXAnchor.constraint(equalTo: viewBackgroundActivityIndicator.centerXAnchor).isActive = true
activityIndicator.startAnimating()
}
}
@objc func stop() {
DispatchQueue.main.async {
self.activityIndicator?.stopAnimating()
self.activityIndicator?.removeFromSuperview()
self.activityIndicator = nil
self.viewActivityIndicator?.removeFromSuperview()
self.viewActivityIndicator = nil
if self.viewBackgroundActivityIndicator is NCViewActivityIndicator {
self.viewBackgroundActivityIndicator?.removeFromSuperview()
}
self.viewBackgroundActivityIndicator = nil
}
}
}
class NCViewActivityIndicator: UIView {
// MARK: - View Life Cycle
override init(frame: CGRect) {
super.init(frame: frame)
}
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
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