119 lines
3.6 KiB
Swift
119 lines
3.6 KiB
Swift
//
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// Swiftfin is subject to the terms of the Mozilla Public
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// License, v2.0. If a copy of the MPL was not distributed with this
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// file, you can obtain one at https://mozilla.org/MPL/2.0/.
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//
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// Copyright (c) 2022 Jellyfin & Jellyfin Contributors
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//
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import Nuke
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import NukeUI
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import SwiftUI
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import UIKit
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struct ImageSource {
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let url: URL?
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let blurHash: String?
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init(url: URL? = nil, blurHash: String? = nil) {
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self.url = url
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self.blurHash = blurHash
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}
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}
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struct DefaultFailureView: View {
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var body: some View {
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Color.secondary
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}
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}
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struct ImageView<FailureView: View>: View {
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@State
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private var sources: [ImageSource]
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private var currentURL: URL? { sources.first?.url }
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private var currentBlurHash: String? { sources.first?.blurHash }
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private var failureView: () -> FailureView
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private var resizingMode: ImageResizingMode
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init(
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_ source: URL?,
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blurHash: String? = nil,
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resizingMode: ImageResizingMode = .aspectFill,
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@ViewBuilder failureView: @escaping () -> FailureView
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) {
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let imageSource = ImageSource(url: source, blurHash: blurHash)
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self.init(imageSource, resizingMode: resizingMode, failureView: failureView)
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}
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init(
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_ source: ImageSource,
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resizingMode: ImageResizingMode = .aspectFill,
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@ViewBuilder failureView: @escaping () -> FailureView
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) {
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self.init([source], resizingMode: resizingMode, failureView: failureView)
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}
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init(
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_ sources: [ImageSource],
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resizingMode: ImageResizingMode = .aspectFill,
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@ViewBuilder failureView: @escaping () -> FailureView
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) {
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_sources = State(initialValue: sources)
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self.resizingMode = resizingMode
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self.failureView = failureView
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}
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@ViewBuilder
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private var placeholderView: some View {
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if let currentBlurHash = currentBlurHash {
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BlurHashView(blurHash: currentBlurHash)
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.id(currentBlurHash)
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} else {
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Color.clear
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}
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}
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var body: some View {
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if let currentURL = currentURL {
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LazyImage(source: currentURL) { state in
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if let image = state.image {
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image
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.resizingMode(resizingMode)
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} else if state.error != nil {
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placeholderView.onAppear {
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sources.removeFirst()
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}
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} else {
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placeholderView
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}
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}
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.pipeline(ImagePipeline(configuration: .withDataCache))
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.id(currentURL)
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} else {
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failureView()
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}
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}
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}
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extension ImageView where FailureView == DefaultFailureView {
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init(_ source: URL?, blurHash: String? = nil, resizingMode: ImageResizingMode = .aspectFill) {
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let imageSource = ImageSource(url: source, blurHash: blurHash)
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self.init([imageSource], resizingMode: resizingMode, failureView: { DefaultFailureView() })
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}
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init(_ source: ImageSource, resizingMode: ImageResizingMode = .aspectFill) {
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self.init([source], resizingMode: resizingMode, failureView: { DefaultFailureView() })
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}
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init(_ sources: [ImageSource], resizingMode: ImageResizingMode = .aspectFill) {
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self.init(sources, resizingMode: resizingMode, failureView: { DefaultFailureView() })
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}
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init(sources: [URL], resizingMode: ImageResizingMode = .aspectFill) {
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let imageSources = sources.compactMap { ImageSource(url: $0, blurHash: nil) }
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self.init(imageSources, resizingMode: resizingMode, failureView: { DefaultFailureView() })
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}
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}
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