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.
115 lines
3.8 KiB
Swift
115 lines
3.8 KiB
Swift
//
|
|
// Copyright 2022 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 Photos
|
|
import UIKit
|
|
|
|
enum ScreenshotDetectorError: String, Error {
|
|
case loadFailed
|
|
case notAuthorized
|
|
}
|
|
|
|
@MainActor
|
|
class ScreenshotDetector {
|
|
var callback: (@MainActor (UIImage?, Error?) -> Void)?
|
|
|
|
/// Flag to whether ask for photos authorization by default if needed.
|
|
var autoRequestPHAuthorization = false
|
|
|
|
init() {
|
|
startObservingScreenshots()
|
|
}
|
|
|
|
private func startObservingScreenshots() {
|
|
NotificationCenter.default.addObserver(self,
|
|
selector: #selector(userDidTakeScreenshot),
|
|
name: UIApplication.userDidTakeScreenshotNotification,
|
|
object: nil)
|
|
}
|
|
|
|
@objc private func userDidTakeScreenshot() {
|
|
let authStatus = PHPhotoLibrary.authorizationStatus(for: .readWrite)
|
|
if authStatus == .authorized {
|
|
findScreenshot()
|
|
} else if authStatus == .notDetermined, autoRequestPHAuthorization {
|
|
Task {
|
|
self.handleAuthStatus(await PHPhotoLibrary.requestAuthorization(for: .readWrite))
|
|
}
|
|
} else {
|
|
fail(withError: ScreenshotDetectorError.notAuthorized)
|
|
}
|
|
}
|
|
|
|
private func handleAuthStatus(_ status: PHAuthorizationStatus) {
|
|
if status == .authorized {
|
|
findScreenshot()
|
|
} else {
|
|
fail(withError: ScreenshotDetectorError.notAuthorized)
|
|
}
|
|
}
|
|
|
|
private func findScreenshot() {
|
|
if let asset = PHAsset.fetchLastScreenshot() {
|
|
let imageManager = PHImageManager()
|
|
imageManager.requestImage(for: asset,
|
|
targetSize: PHImageManagerMaximumSize,
|
|
contentMode: .default,
|
|
options: PHImageRequestOptions.highQualitySyncLocal) { [weak self] image, _ in
|
|
guard let image else {
|
|
self?.fail(withError: ScreenshotDetectorError.loadFailed)
|
|
return
|
|
}
|
|
self?.succeed(withImage: image)
|
|
}
|
|
} else {
|
|
fail(withError: ScreenshotDetectorError.loadFailed)
|
|
}
|
|
}
|
|
|
|
func succeed(withImage image: UIImage) {
|
|
callback?(image, nil)
|
|
}
|
|
|
|
func fail(withError error: Error) {
|
|
callback?(nil, error)
|
|
}
|
|
}
|
|
|
|
extension PHAsset {
|
|
static func fetchLastScreenshot() -> PHAsset? {
|
|
let options = PHFetchOptions()
|
|
|
|
options.fetchLimit = 1
|
|
options.includeAssetSourceTypes = [.typeUserLibrary]
|
|
options.wantsIncrementalChangeDetails = false
|
|
options.predicate = NSPredicate(format: "(mediaSubtype & %d) != 0", PHAssetMediaSubtype.photoScreenshot.rawValue)
|
|
options.sortDescriptors = [NSSortDescriptor(key: "creationDate", ascending: false)]
|
|
|
|
return PHAsset.fetchAssets(with: .image, options: options).firstObject
|
|
}
|
|
}
|
|
|
|
private extension PHImageRequestOptions {
|
|
static var highQualitySyncLocal: PHImageRequestOptions {
|
|
let options = PHImageRequestOptions()
|
|
options.deliveryMode = .highQualityFormat
|
|
options.isNetworkAccessAllowed = false
|
|
options.isSynchronous = true
|
|
return options
|
|
}
|
|
}
|