9f847454e7
* Fix Timeline on Xcode 14/iOS 16
Raise requirement to iOS 16+
Reduce pagination jumping.
Sonarcloud fixes.
Fix verification test.
Adopt if let optional { syntax.
* Remove unused ScrollViewReader
The ScrollViewReader didn't appear to change the behaviour.
* Fix warnings on Run Scripts.
Run script build phase 'SwiftLint' will be run during every build because it does not specify any outputs. To address this warning, either add output dependencies to the script phase, or configure it to run in every build by unchecking "Based on dependency analysis" in the script phase.
105 lines
3.1 KiB
Swift
105 lines
3.1 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 Foundation
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import UIKit
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/// UIKitBackgroundTask is a concrete implementation of BackgroundTaskProtocol using UIApplication background task.
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class UIKitBackgroundTask: BackgroundTaskProtocol {
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let name: String
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var isRunning: Bool {
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identifier != .invalid
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}
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let isReusable: Bool
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let expirationHandler: BackgroundTaskExpirationHandler?
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var elapsedTime: TimeInterval {
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Date().timeIntervalSince(startDate) * 1000
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}
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private let application: ApplicationProtocol
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private var identifier: UIBackgroundTaskIdentifier = .invalid
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private var useCounter = 0
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private let startDate = Date()
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/// Initializes and starts a new background task
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/// - Parameters:
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/// - name: name
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/// - isReusable: flag indicating the task is reusable
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/// - application: application instance
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/// - expirationHandler: expiration handler
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init?(name: String,
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isReusable: Bool,
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application: ApplicationProtocol,
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expirationHandler: BackgroundTaskExpirationHandler?) {
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self.name = name
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self.isReusable = isReusable
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self.application = application
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self.expirationHandler = expirationHandler
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// attempt to start
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identifier = application.beginBackgroundTask(withName: name) { [weak self] in
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guard let self else { return }
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self.expirationHandler?(self)
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}
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if identifier == .invalid {
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MXLog.verbose("Do not start background task: \(name), as OS declined")
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// call expiration handler immediately
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expirationHandler?(self)
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return nil
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}
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if isReusable {
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// creation itself is a use
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reuse()
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}
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MXLog.verbose("Start background task #\(identifier.rawValue) - \(name)")
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}
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func reuse() {
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guard isReusable else {
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return
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}
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useCounter += 1
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}
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func stop() {
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if isReusable {
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useCounter -= 1
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if useCounter <= 0 {
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endTask()
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}
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} else {
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endTask()
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}
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}
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private func endTask() {
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if identifier != .invalid {
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MXLog.verbose("End background task #\(identifier.rawValue) - \(name) after \(readableElapsedTime)")
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application.endBackgroundTask(identifier)
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identifier = .invalid
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}
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}
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private var readableElapsedTime: String {
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String(format: "%.3fms", elapsedTime)
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}
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}
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