Memory warning clears MediaPageView cache
Doing so required MediaDetailView to retain GalleryItem, but because GalleryItem is a swift struct, I had to envoke the Box dance. // FREEBIE
This commit is contained in:
Michael Kirk
parent
b6e0cb3f38
commit
4c2d30a776
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@ -7,9 +7,8 @@
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NS_ASSUME_NONNULL_BEGIN
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@class ConversationViewItem;
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@class GalleryItemBox;
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@class MediaDetailViewController;
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@class SignalAttachment;
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@class TSAttachmentStream;
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@protocol MediaDetailViewControllerDelegate <NSObject>
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@ -22,14 +21,11 @@ NS_ASSUME_NONNULL_BEGIN
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@interface MediaDetailViewController : OWSViewController
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@property (nonatomic, weak) id<MediaDetailViewControllerDelegate> delegate;
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@property (nonatomic, readonly) GalleryItemBox *galleryItemBox;
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// If viewItem is non-null, long press will show a menu controller.
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- (instancetype)initWithAttachmentStream:(TSAttachmentStream *)attachmentStream
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viewItem:(ConversationViewItem *_Nullable)viewItem;
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- (void)presentFromViewController:(UIViewController *)viewController
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replacingView:(UIView *)view NS_SWIFT_NAME(present(fromViewController:replacingView:));
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- (instancetype)initWithGalleryItemBox:(GalleryItemBox *)galleryItemBox
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viewItem:(ConversationViewItem *_Nullable)viewItem;
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#pragma mark - Actions
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- (void)didPressShare:(id)sender;
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@ -58,10 +58,9 @@ NS_ASSUME_NONNULL_BEGIN
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@property (nonatomic) UIView *replacingView;
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@property (nonatomic) UIButton *shareButton;
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@property (nonatomic) CGRect originRect;
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@property (nonatomic) NSData *fileData;
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@property (nonatomic, nullable) TSAttachmentStream *attachmentStream;
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@property (nonatomic) TSAttachmentStream *attachmentStream;
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@property (nonatomic, nullable) ConversationViewItem *viewItem;
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@property (nonatomic, nullable) OWSVideoPlayer *videoPlayer;
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@ -80,20 +79,25 @@ NS_ASSUME_NONNULL_BEGIN
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@implementation MediaDetailViewController
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- (instancetype)initWithAttachmentStream:(TSAttachmentStream *)attachmentStream
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viewItem:(ConversationViewItem *_Nullable)viewItem
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- (instancetype)initWithGalleryItemBox:(GalleryItemBox *)galleryItemBox
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viewItem:(ConversationViewItem *_Nullable)viewItem
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{
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self = [super initWithNibName:nil bundle:nil];
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if (!self) {
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return self;
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}
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self.attachmentStream = attachmentStream;
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self.viewItem = viewItem;
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_galleryItemBox = galleryItemBox;
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_viewItem = viewItem;
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return self;
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}
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- (TSAttachmentStream *)attachmentStream
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{
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return self.galleryItemBox.attachmentStream;
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}
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- (NSURL *_Nullable)attachmentUrl
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{
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return self.attachmentStream.mediaURL;
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@ -8,7 +8,7 @@ public enum GalleryDirection {
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case before, after, around
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}
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public struct MediaGalleryItem: Equatable {
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public struct MediaGalleryItem: Equatable, Hashable {
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let logTag = "[MediaGalleryItem]"
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let message: TSMessage
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@ -48,6 +48,13 @@ public struct MediaGalleryItem: Equatable {
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public static func == (lhs: MediaGalleryItem, rhs: MediaGalleryItem) -> Bool {
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return lhs.message.uniqueId == rhs.message.uniqueId
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}
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// MARK: Hashable
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public var hashValue: Int {
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return message.hashValue
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}
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}
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public struct GalleryDate: Hashable, Comparable, Equatable {
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@ -226,8 +233,8 @@ class MediaGalleryViewController: UINavigationController, MediaGalleryDataSource
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// MARK: Present/Dismiss
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private var currentPage: MediaGalleryPage? {
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return self.pageViewController!.currentPage
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private var currentItem: MediaGalleryItem {
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return self.pageViewController!.currentItem
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}
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private var replacingView: UIView?
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@ -327,15 +334,7 @@ class MediaGalleryViewController: UINavigationController, MediaGalleryDataSource
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self.view.isUserInteractionEnabled = true
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guard let currentPage = self.currentPage else {
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owsFail("\(self.logTag) in \(#function) currentPage was unexpectedly nil")
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self.dismissSelf(animated: false, completion: nil)
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return
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}
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if currentPage.isVideo {
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currentPage.viewController.playVideo()
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}
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pageViewController.wasPresented()
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})
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}
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}
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@ -391,12 +390,6 @@ class MediaGalleryViewController: UINavigationController, MediaGalleryDataSource
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self.view.isUserInteractionEnabled = false
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UIApplication.shared.isStatusBarHidden = false
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guard let currentPage = self.currentPage else {
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owsFail("\(logTag) in \(#function) currentItem was unexpectedly nil")
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self.presentingViewController?.dismiss(animated: false, completion: completion)
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return
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}
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guard let detailView = pageViewController?.view else {
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owsFail("\(logTag) in \(#function) detailView was unexpectedly nil")
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self.presentingViewController?.dismiss(animated: false, completion: completion)
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@ -407,9 +400,9 @@ class MediaGalleryViewController: UINavigationController, MediaGalleryDataSource
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// Move the presentationView back to it's initial position, i.e. where
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// it sits on the screen in the conversation view.
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let changedItems = currentPage.galleryItem != self.initialDetailItem
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let changedItems = currentItem != self.initialDetailItem
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if changedItems {
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self.presentationView.image = currentPage.image
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self.presentationView.image = currentItem.fullSizedImage
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self.applyOffscreenMediaViewConstraints()
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} else {
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self.applyInitialMediaViewConstraints()
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@ -4,32 +4,30 @@
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import UIKit
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public struct MediaGalleryPage: Equatable {
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public let viewController: MediaDetailViewController
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public let galleryItem: MediaGalleryItem
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public var message: TSMessage {
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return galleryItem.message
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// Objc wrapper for the MediaGalleryItem struct
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@objc
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public class GalleryItemBox: NSObject {
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public let value: MediaGalleryItem
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init(_ value: MediaGalleryItem) {
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self.value = value
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}
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public var attachmentStream: TSAttachmentStream {
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return galleryItem.attachmentStream
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return value.attachmentStream
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}
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}
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public var isVideo: Bool {
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return galleryItem.isVideo
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fileprivate class Box<A> {
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var value: A
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init(_ val: A) {
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self.value = val
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}
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}
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public var image: UIImage {
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// TODO cache this
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return galleryItem.fullSizedImage
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}
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// MARK: Equatable
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public static func == (lhs: MediaGalleryPage, rhs: MediaGalleryPage) -> Bool {
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return lhs.galleryItem == rhs.galleryItem
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fileprivate extension MediaDetailViewController {
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fileprivate var galleryItem: MediaGalleryItem {
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return self.galleryItemBox.value
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}
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}
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@ -37,26 +35,24 @@ class MediaPageViewController: UIPageViewController, UIPageViewControllerDataSou
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private weak var mediaGalleryDataSource: MediaGalleryDataSource?
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private var cachedPages: [MediaGalleryPage] = []
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private var initialPage: MediaGalleryPage!
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private var cachedPages: [MediaGalleryItem: MediaDetailViewController] = [:]
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private var initialPage: MediaDetailViewController!
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public var currentPage: MediaGalleryPage! {
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return cachedPages.first { $0.viewController == viewControllers?.first }
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private var currentViewController: MediaDetailViewController {
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return viewControllers!.first as! MediaDetailViewController
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}
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public var currentItem: MediaGalleryItem! {
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get {
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return currentPage.galleryItem
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return currentViewController.galleryItemBox.value
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}
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set {
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// FIXME cache separate from ordering so we don't have to clear cache
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guard let galleryPage = self.buildGalleryPage(galleryItem: newValue) else {
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owsFail("unexpetedly unable to build initial gallery item")
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owsFail("unexpetedly unable to build new gallery page")
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return
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}
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self.cachedPages = [galleryPage]
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self.setViewControllers([galleryPage.viewController], direction: .forward, animated: false, completion: nil)
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self.setViewControllers([galleryPage], direction: .forward, animated: false, completion: nil)
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}
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}
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@ -88,8 +84,7 @@ class MediaPageViewController: UIPageViewController, UIPageViewControllerDataSou
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return
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}
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self.initialPage = initialPage
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cachedPages = [initialPage]
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self.setViewControllers([initialPage.viewController], direction: .forward, animated: false, completion: nil)
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self.setViewControllers([initialPage], direction: .forward, animated: false, completion: nil)
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}
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@available(*, unavailable, message: "Unimplemented")
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@ -175,8 +170,22 @@ class MediaPageViewController: UIPageViewController, UIPageViewControllerDataSou
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view.addGestureRecognizer(verticalSwipe)
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}
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override func didReceiveMemoryWarning() {
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Logger.info("\(logTag) in \(#function)")
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super.didReceiveMemoryWarning()
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self.cachedPages = [:]
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}
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// MARK: View Helpers
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public func wasPresented() {
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let currentViewController = self.currentViewController
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if currentViewController.galleryItem.isVideo {
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currentViewController.playVideo()
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}
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}
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@objc
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public func didPressAllMediaButton(sender: Any) {
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Logger.debug("\(logTag) in \(#function)")
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@ -218,7 +227,7 @@ class MediaPageViewController: UIPageViewController, UIPageViewControllerDataSou
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self.view.backgroundColor = shouldHideToolbars ? UIColor.black : UIColor.white
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UIView.animate(withDuration: 0.1) {
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self.currentPage.viewController.setShouldHideToolbars(self.shouldHideToolbars)
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self.currentViewController.setShouldHideToolbars(self.shouldHideToolbars)
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self.footerBar.alpha = self.shouldHideToolbars ? 0 : 1
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}
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}
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@ -237,7 +246,7 @@ class MediaPageViewController: UIPageViewController, UIPageViewControllerDataSou
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UIBarButtonItem(barButtonSystemItem: .flexibleSpace, target:nil, action:nil)
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]
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if (self.currentPage.isVideo) {
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if (self.currentItem.isVideo) {
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toolbarItems += [
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isPlayingVideo ? self.videoPauseBarButton : self.videoPlayBarButton,
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UIBarButtonItem(barButtonSystemItem: .flexibleSpace, target:nil, action:nil)
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@ -301,13 +310,13 @@ class MediaPageViewController: UIPageViewController, UIPageViewControllerDataSou
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assert(pendingViewControllers.count == 1)
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pendingViewControllers.forEach { viewController in
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guard let pendingPage = self.cachedPages.first(where: { $0.viewController == viewController}) else {
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guard let pendingPage = viewController as? MediaDetailViewController else {
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owsFail("\(logTag) in \(#function) unexpected mediaDetailViewController: \(viewController)")
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return
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}
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// Ensure upcoming page respects current toolbar status
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pendingPage.viewController.setShouldHideToolbars(self.shouldHideToolbars)
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pendingPage.setShouldHideToolbars(self.shouldHideToolbars)
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}
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}
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@ -316,16 +325,17 @@ class MediaPageViewController: UIPageViewController, UIPageViewControllerDataSou
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assert(previousViewControllers.count == 1)
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previousViewControllers.forEach { viewController in
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guard let previousPage = self.cachedPages.first(where: { $0.viewController == viewController}) else {
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guard let previousPage = viewController as? MediaDetailViewController else {
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owsFail("\(logTag) in \(#function) unexpected mediaDetailViewController: \(viewController)")
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return
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}
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// Do any cleanup for the no-longer visible view controller
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if transitionCompleted {
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previousPage.viewController.zoomOut(animated: false)
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if previousPage.isVideo {
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previousPage.viewController.stopVideo()
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previousPage.zoomOut(animated: false)
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if previousPage.galleryItem.isVideo {
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previousPage.stopVideo()
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}
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updateFooterBarButtonItems(isPlayingVideo: false)
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}
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@ -337,66 +347,62 @@ class MediaPageViewController: UIPageViewController, UIPageViewControllerDataSou
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public func pageViewController(_ pageViewController: UIPageViewController, viewControllerBefore viewController: UIViewController) -> UIViewController? {
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Logger.debug("\(logTag) in \(#function)")
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guard let currentIndex = cachedPages.index(where: { $0.viewController == viewController }) else {
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owsFail("\(self.logTag) unknown view controller. \(viewController)")
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guard let previousDetailViewController = viewController as? MediaDetailViewController else {
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owsFail("\(logTag) in \(#function) unexpected viewController: \(viewController)")
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return nil
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}
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let currentPage = cachedPages[currentIndex]
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let newIndex = currentIndex - 1
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if let cachedPage = cachedPages[safe: newIndex] {
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return cachedPage.viewController
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}
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guard let mediaGalleryDataSource = self.mediaGalleryDataSource else {
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owsFail("\(logTag) in \(#function) mediaGalleryDataSource was unexpectedly nil")
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return nil
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}
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guard let previousItem: MediaGalleryItem = mediaGalleryDataSource.galleryItem(before: currentPage.galleryItem) else {
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let previousItem = previousDetailViewController.galleryItem
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guard let nextItem: MediaGalleryItem = mediaGalleryDataSource.galleryItem(before: previousItem) else {
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return nil
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}
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guard let previousPage: MediaGalleryPage = buildGalleryPage(galleryItem: previousItem) else {
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guard let nextPage: MediaDetailViewController = buildGalleryPage(galleryItem: nextItem) else {
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return nil
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}
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cachedPages.insert(previousPage, at: currentIndex)
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return previousPage.viewController
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return nextPage
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}
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public func pageViewController(_ pageViewController: UIPageViewController, viewControllerAfter viewController: UIViewController) -> UIViewController? {
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Logger.debug("\(logTag) in \(#function)")
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guard let currentIndex = cachedPages.index(where: { $0.viewController == viewController }) else {
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owsFail("\(self.logTag) unknown view controller. \(viewController)")
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guard let previousDetailViewController = viewController as? MediaDetailViewController else {
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owsFail("\(logTag) in \(#function) unexpected viewController: \(viewController)")
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return nil
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}
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let currentPage = cachedPages[currentIndex]
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let newIndex = currentIndex + 1
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if let cachedPage = cachedPages[safe: newIndex] {
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return cachedPage.viewController
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}
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guard let mediaGalleryDataSource = self.mediaGalleryDataSource else {
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owsFail("\(logTag) in \(#function) mediaGalleryDataSource was unexpectedly nil")
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return nil
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}
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guard let nextItem: MediaGalleryItem = mediaGalleryDataSource.galleryItem(after: currentPage.galleryItem) else {
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let previousItem = previousDetailViewController.galleryItem
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guard let nextItem = mediaGalleryDataSource.galleryItem(after: previousItem) else {
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// no more pages
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return nil
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}
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guard let nextPage: MediaGalleryPage = buildGalleryPage(galleryItem: nextItem) else {
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guard let nextPage: MediaDetailViewController = buildGalleryPage(galleryItem: nextItem) else {
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return nil
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}
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cachedPages.insert(nextPage, at: newIndex)
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return nextPage.viewController
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return nextPage
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}
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private func buildGalleryPage(galleryItem: MediaGalleryItem) -> MediaGalleryPage? {
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private func buildGalleryPage(galleryItem: MediaGalleryItem) -> MediaDetailViewController? {
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if let cachedPage = cachedPages[galleryItem] {
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Logger.debug("\(logTag) in \(#function) cache hit.")
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return cachedPage
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}
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Logger.debug("\(logTag) in \(#function) cache miss.")
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var fetchedItem: ConversationViewItem? = nil
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self.uiDatabaseConnection.read { transaction in
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let message = galleryItem.message
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@ -405,21 +411,23 @@ class MediaPageViewController: UIPageViewController, UIPageViewControllerDataSou
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}
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guard let viewItem = fetchedItem else {
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owsFail("viewItem stream unexpectedly nil")
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owsFail("viewItem was unexpectedly nil")
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return nil
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}
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let viewController = MediaDetailViewController(attachmentStream: galleryItem.attachmentStream, viewItem: viewItem)
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let viewController = MediaDetailViewController(galleryItemBox: GalleryItemBox(galleryItem), viewItem: viewItem)
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viewController.delegate = self
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return MediaGalleryPage(viewController: viewController, galleryItem: galleryItem)
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cachedPages[galleryItem] = viewController
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return viewController
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}
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// MARK: MediaDetailViewControllerDelegate
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public func dismissSelf(animated isAnimated: Bool, completion: (() -> Void)? = nil) {
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// Swapping mediaView for presentationView will be perceptible if we're not zoomed out all the way.
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currentPage.viewController.zoomOut(animated: true)
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// currentVC
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currentViewController.zoomOut(animated: true)
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guard let mediaGalleryDataSource = self.mediaGalleryDataSource else {
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owsFail("\(logTag) in \(#function) mediaGalleryDataSource was unexpectedly nil")
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@ -432,7 +440,7 @@ class MediaPageViewController: UIPageViewController, UIPageViewControllerDataSou
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}
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public func mediaDetailViewController(_ mediaDetailViewController: MediaDetailViewController, isPlayingVideo: Bool) {
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guard mediaDetailViewController == currentPage.viewController else {
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guard mediaDetailViewController == currentViewController else {
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Logger.verbose("\(logTag) in \(#function) ignoring stale delegate.")
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return
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}
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@ -9,7 +9,7 @@ public func BenchAsync(title: String, block: (() -> Void) -> Void) {
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block {
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let timeElapsed = CFAbsoluteTimeGetCurrent() - startTime
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print("[Bench] title: \(title), duration: \(timeElapsed)")
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Logger.debug("[Bench] title: \(title), duration: \(timeElapsed)")
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}
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}
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