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Prefetch media

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This commit is contained in:
Justin Mazzocchi 2021-01-30 23:43:48 -08:00
parent 0f9ab62415
commit 108e553788
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GPG key ID: E223E6937AAFB01C
4 changed files with 82 additions and 0 deletions
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15
Caches/PrefetchRequestModifier.swift Normal file
View file

@ -0,0 +1,15 @@
// Copyright © 2021 Metabolist. All rights reserved.
import Foundation
import Kingfisher
struct PrefetchRequestModifier: ImageDownloadRequestModifier {
func modified(for request: URLRequest) -> URLRequest? {
var mutableRequest = request
mutableRequest.allowsExpensiveNetworkAccess = false
mutableRequest.allowsConstrainedNetworkAccess = false
return request
}
}

47
Extensions/CollectionItem+Extensions.swift
View file

@ -1,5 +1,6 @@
// Copyright © 2020 Metabolist. All rights reserved.
import Mastodon
import UIKit
import ViewModels
@ -61,4 +62,50 @@ extension CollectionItem {
return UITableView.automaticDimension
}
}
func mediaPrefetchURLs(identityContext: IdentityContext) -> Set<URL> {
switch self {
case let .status(status, _):
return status.mediaPrefetchURLs(identityContext: identityContext)
case let .account(account, _):
return account.mediaPrefetchURLs(identityContext: identityContext)
case let .notification(notification, _):
var urls = notification.account.mediaPrefetchURLs(identityContext: identityContext)
if let status = notification.status {
urls.formUnion(status.mediaPrefetchURLs(identityContext: identityContext))
}
return urls
case let .conversation(conversation):
return conversation.accounts.reduce(Set<URL>()) {
$0.union($1.mediaPrefetchURLs(identityContext: identityContext))
}
default:
return []
}
}
}
private extension Account {
func mediaPrefetchURLs(identityContext: IdentityContext) -> Set<URL> {
var urls = Set(emojis.map(\.url))
if !identityContext.appPreferences.shouldReduceMotion
&& identityContext.appPreferences.animateAvatars == .everywhere {
urls.insert(avatar)
} else {
urls.insert(avatarStatic)
}
return urls
}
}
private extension Status {
func mediaPrefetchURLs(identityContext: IdentityContext) -> Set<URL> {
displayStatus.account.mediaPrefetchURLs(identityContext: identityContext)
.union(displayStatus.mediaAttachments.compactMap(\.previewUrl))
.union(displayStatus.emojis.map(\.url))
}
}

4
Metatext.xcodeproj/project.pbxproj
View file

@ -56,6 +56,7 @@
D036EBB8259FE29800EC1CFC /* Status+Extensions.swift in Sources */ = {isa = PBXBuildFile; fileRef = D0849C7E25903C4900A5EBCC /* Status+Extensions.swift */; };
D036EBC2259FE2AD00EC1CFC /* UIVIewController+Extensions.swift in Sources */ = {isa = PBXBuildFile; fileRef = D0E7AD3825870B13005F5E2D /* UIVIewController+Extensions.swift */; };
D03D87F425C23C44004DCBB2 /* SecondaryNavigationTitleView.swift in Sources */ = {isa = PBXBuildFile; fileRef = D03D87F325C23C44004DCBB2 /* SecondaryNavigationTitleView.swift */; };
D0477F1525C68BAC005C5368 /* PrefetchRequestModifier.swift in Sources */ = {isa = PBXBuildFile; fileRef = D0477F1425C68BAC005C5368 /* PrefetchRequestModifier.swift */; };
D04F9E8E259E9C950081B0C9 /* ViewModels in Frameworks */ = {isa = PBXBuildFile; productRef = D04F9E8D259E9C950081B0C9 /* ViewModels */; };
D05936CF25A8D79800754FDF /* EditAttachmentViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = D05936CE25A8D79800754FDF /* EditAttachmentViewController.swift */; };
D05936D025A8D79800754FDF /* EditAttachmentViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = D05936CE25A8D79800754FDF /* EditAttachmentViewController.swift */; };
@ -251,6 +252,7 @@
D036AA0B254B612B009094DF /* NotificationContentConfiguration.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = NotificationContentConfiguration.swift; sourceTree = "<group>"; };
D036AA16254CA823009094DF /* StatusBodyView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = StatusBodyView.swift; sourceTree = "<group>"; };
D03D87F325C23C44004DCBB2 /* SecondaryNavigationTitleView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SecondaryNavigationTitleView.swift; sourceTree = "<group>"; };
D0477F1425C68BAC005C5368 /* PrefetchRequestModifier.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PrefetchRequestModifier.swift; sourceTree = "<group>"; };
D047FA8C24C3E21200AF17C5 /* Metatext.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = Metatext.app; sourceTree = BUILT_PRODUCTS_DIR; };
D05936CE25A8D79800754FDF /* EditAttachmentViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = EditAttachmentViewController.swift; sourceTree = "<group>"; };
D05936DD25A937EC00754FDF /* EditThumbnailView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = EditThumbnailView.swift; sourceTree = "<group>"; };
@ -737,6 +739,7 @@
D025B14C25C4E482001C69A8 /* ImageCacheConfiguration.swift */,
D025B14525C4D26A001C69A8 /* ImageCacheSerializer.swift */,
D0FE1C9725368A9D003EF1EB /* PlayerCache.swift */,
D0477F1425C68BAC005C5368 /* PrefetchRequestModifier.swift */,
);
path = Caches;
sourceTree = "<group>";
@ -967,6 +970,7 @@
D08B8D622540DE3B00B1EBEF /* ZoomTransitionController.swift in Sources */,
D0F0B12E251A97E400942152 /* TableViewController.swift in Sources */,
D0DD50CB256B1F24004A04F7 /* ReportView.swift in Sources */,
D0477F1525C68BAC005C5368 /* PrefetchRequestModifier.swift in Sources */,
D097F41B25BE3E1A00859F2C /* SearchScope+Extensions.swift in Sources */,
D035F8B325B9616000DC75ED /* Timeline+Extensions.swift in Sources */,
D0FE1C8F253686F9003EF1EB /* PlayerView.swift in Sources */,

16
View Controllers/TableViewController.swift
View file

@ -2,6 +2,7 @@
import AVKit
import Combine
import Kingfisher
import Mastodon
import SafariServices
import SwiftUI
@ -48,6 +49,7 @@ class TableViewController: UITableViewController {
super.viewDidLoad()
tableView.dataSource = dataSource
tableView.prefetchDataSource = self
tableView.cellLayoutMarginsFollowReadableWidth = true
tableView.tableFooterView = UIView()
tableView.contentInset.bottom = bottomInset
@ -189,6 +191,20 @@ extension TableViewController {
}
}
extension TableViewController: UITableViewDataSourcePrefetching {
func tableView(_ tableView: UITableView, prefetchRowsAt indexPaths: [IndexPath]) {
let urls = indexPaths.compactMap(dataSource.itemIdentifier(for:))
.reduce(Set<URL>()) { $0.union($1.mediaPrefetchURLs(identityContext: viewModel.identityContext)) }
var imageOptions = KingfisherManager.shared.defaultOptions
imageOptions.append(.requestModifier(PrefetchRequestModifier()))
for url in urls {
KingfisherManager.shared.retrieveImage(with: url, completionHandler: nil)
}
}
}
extension TableViewController: AVPlayerViewControllerDelegate {
func playerViewController(
_ playerViewController: AVPlayerViewController,