501 lines
15 KiB
Objective-C
501 lines
15 KiB
Objective-C
//
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// Copyright (c) 2018 Open Whisper Systems. All rights reserved.
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//
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#import "MediaDetailViewController.h"
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#import "ConversationViewItem.h"
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#import "Session-Swift.h"
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#import "TSAttachmentStream.h"
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#import "TSInteraction.h"
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#import "UIColor+OWS.h"
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#import "UIUtil.h"
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#import "UIView+OWS.h"
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#import <AVKit/AVKit.h>
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#import <MediaPlayer/MPMoviePlayerViewController.h>
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#import <MediaPlayer/MediaPlayer.h>
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#import <SignalUtilitiesKit/SignalUtilitiesKit-Swift.h>
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#import <SessionUtilitiesKit/NSData+Image.h>
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#import <SessionUIKit/SessionUIKit.h>
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#import <YYImage/YYImage.h>
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NS_ASSUME_NONNULL_BEGIN
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#pragma mark -
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@interface MediaDetailViewController () <UIScrollViewDelegate,
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UIGestureRecognizerDelegate,
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PlayerProgressBarDelegate,
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OWSVideoPlayerDelegate>
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@property (nonatomic) UIScrollView *scrollView;
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@property (nonatomic) UIView *mediaView;
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@property (nonatomic) UIView *presentationView;
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@property (nonatomic) UIView *replacingView;
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@property (nonatomic) UIButton *shareButton;
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@property (nonatomic) TSAttachmentStream *attachmentStream;
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@property (nonatomic, nullable) id<ConversationViewItem> viewItem;
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@property (nonatomic, nullable) UIImage *image;
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@property (nonatomic, nullable) OWSVideoPlayer *videoPlayer;
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@property (nonatomic, nullable) UIButton *playVideoButton;
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@property (nonatomic, nullable) PlayerProgressBar *videoProgressBar;
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@property (nonatomic, nullable) UIBarButtonItem *videoPlayBarButton;
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@property (nonatomic, nullable) UIBarButtonItem *videoPauseBarButton;
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@property (nonatomic, nullable) NSArray<NSLayoutConstraint *> *presentationViewConstraints;
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@property (nonatomic, nullable) NSLayoutConstraint *mediaViewBottomConstraint;
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@property (nonatomic, nullable) NSLayoutConstraint *mediaViewLeadingConstraint;
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@property (nonatomic, nullable) NSLayoutConstraint *mediaViewTopConstraint;
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@property (nonatomic, nullable) NSLayoutConstraint *mediaViewTrailingConstraint;
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@end
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#pragma mark -
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@implementation MediaDetailViewController
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- (void)dealloc
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{
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[self stopAnyVideo];
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}
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- (instancetype)initWithGalleryItemBox:(GalleryItemBox *)galleryItemBox
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viewItem:(nullable id<ConversationViewItem>)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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_galleryItemBox = galleryItemBox;
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_viewItem = viewItem;
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// We cache the image data in case the attachment stream is deleted.
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__weak MediaDetailViewController *weakSelf = self;
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_image = [galleryItemBox.attachmentStream
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thumbnailImageLargeWithSuccess:^(UIImage *image) {
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weakSelf.image = image;
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[weakSelf updateContents];
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[weakSelf updateMinZoomScale];
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}
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failure:^{
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OWSLogWarn(@"Could not load media.");
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}];
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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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- (BOOL)isAnimated
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{
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return self.attachmentStream.isAnimated;
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}
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- (BOOL)isVideo
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{
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return self.attachmentStream.isVideo;
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}
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- (void)viewDidLoad
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{
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[super viewDidLoad];
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self.view.backgroundColor = LKColors.navigationBarBackground;
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[self updateContents];
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// Loki: Set navigation bar background color
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UINavigationBar *navigationBar = self.navigationController.navigationBar;
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[navigationBar setBackgroundImage:[UIImage new] forBarMetrics:UIBarMetricsDefault];
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navigationBar.shadowImage = [UIImage new];
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[navigationBar setTranslucent:NO];
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navigationBar.barTintColor = LKColors.navigationBarBackground;
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}
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- (void)viewWillAppear:(BOOL)animated
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{
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[super viewWillAppear:animated];
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[self resetMediaFrame];
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}
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- (void)viewDidLayoutSubviews
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{
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[super viewDidLayoutSubviews];
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[self updateMinZoomScale];
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[self centerMediaViewConstraints];
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}
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- (void)updateMinZoomScale
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{
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if (!self.image) {
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self.scrollView.minimumZoomScale = 1.f;
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self.scrollView.maximumZoomScale = 1.f;
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self.scrollView.zoomScale = 1.f;
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return;
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}
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CGSize viewSize = self.scrollView.bounds.size;
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UIImage *image = self.image;
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OWSAssertDebug(image);
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if (image.size.width == 0 || image.size.height == 0) {
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OWSFailDebug(@"Invalid image dimensions. %@", NSStringFromCGSize(image.size));
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return;
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}
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CGFloat scaleWidth = viewSize.width / image.size.width;
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CGFloat scaleHeight = viewSize.height / image.size.height;
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CGFloat minScale = MIN(scaleWidth, scaleHeight);
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if (minScale != self.scrollView.minimumZoomScale) {
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self.scrollView.minimumZoomScale = minScale;
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self.scrollView.maximumZoomScale = minScale * 8;
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self.scrollView.zoomScale = minScale;
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}
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}
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- (void)zoomOutAnimated:(BOOL)isAnimated
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{
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if (self.scrollView.zoomScale != self.scrollView.minimumZoomScale) {
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[self.scrollView setZoomScale:self.scrollView.minimumZoomScale animated:isAnimated];
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}
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}
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#pragma mark - Initializers
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- (void)updateContents
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{
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[self.mediaView removeFromSuperview];
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[self.scrollView removeFromSuperview];
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[self.playVideoButton removeFromSuperview];
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[self.videoProgressBar removeFromSuperview];
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UIScrollView *scrollView = [UIScrollView new];
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[self.view addSubview:scrollView];
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self.scrollView = scrollView;
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scrollView.delegate = self;
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scrollView.showsVerticalScrollIndicator = NO;
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scrollView.showsHorizontalScrollIndicator = NO;
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scrollView.decelerationRate = UIScrollViewDecelerationRateFast;
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if (@available(iOS 11.0, *)) {
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[scrollView contentInsetAdjustmentBehavior];
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} else {
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self.automaticallyAdjustsScrollViewInsets = NO;
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}
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[scrollView ows_autoPinToSuperviewEdges];
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if (self.isAnimated) {
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if (self.attachmentStream.isValidImage) {
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YYImage *animatedGif = [YYImage imageWithContentsOfFile:self.attachmentStream.originalFilePath];
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YYAnimatedImageView *animatedView = [YYAnimatedImageView new];
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animatedView.image = animatedGif;
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self.mediaView = animatedView;
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} else {
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self.mediaView = [UIView new];
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self.mediaView.backgroundColor = LKColors.unimportant;
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}
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} else if (!self.image) {
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// Still loading thumbnail.
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self.mediaView = [UIView new];
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self.mediaView.backgroundColor = LKColors.unimportant;
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} else if (self.isVideo) {
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if (self.attachmentStream.isValidVideo) {
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self.mediaView = [self buildVideoPlayerView];
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} else {
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self.mediaView = [UIView new];
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self.mediaView.backgroundColor = LKColors.unimportant;
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}
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} else {
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// Present the static image using standard UIImageView
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UIImageView *imageView = [[UIImageView alloc] initWithImage:self.image];
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self.mediaView = imageView;
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}
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OWSAssertDebug(self.mediaView);
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// We add these gestures to mediaView rather than
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// the root view so that interacting with the video player
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// progres bar doesn't trigger any of these gestures.
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[self addGestureRecognizersToView:self.mediaView];
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[scrollView addSubview:self.mediaView];
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self.mediaViewLeadingConstraint = [self.mediaView autoPinEdgeToSuperviewEdge:ALEdgeLeading];
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self.mediaViewTopConstraint = [self.mediaView autoPinEdgeToSuperviewEdge:ALEdgeTop];
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self.mediaViewTrailingConstraint = [self.mediaView autoPinEdgeToSuperviewEdge:ALEdgeTrailing];
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self.mediaViewBottomConstraint = [self.mediaView autoPinEdgeToSuperviewEdge:ALEdgeBottom];
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self.mediaView.contentMode = UIViewContentModeScaleAspectFit;
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self.mediaView.userInteractionEnabled = YES;
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self.mediaView.clipsToBounds = YES;
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self.mediaView.layer.allowsEdgeAntialiasing = YES;
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self.mediaView.translatesAutoresizingMaskIntoConstraints = NO;
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// Use trilinear filters for better scaling quality at
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// some performance cost.
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self.mediaView.layer.minificationFilter = kCAFilterTrilinear;
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self.mediaView.layer.magnificationFilter = kCAFilterTrilinear;
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if (self.isVideo) {
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PlayerProgressBar *videoProgressBar = [PlayerProgressBar new];
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videoProgressBar.delegate = self;
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videoProgressBar.player = self.videoPlayer.avPlayer;
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// We hide the progress bar until either:
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// 1. Video completes playing
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// 2. User taps the screen
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videoProgressBar.hidden = YES;
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self.videoProgressBar = videoProgressBar;
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[self.view addSubview:videoProgressBar];
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[videoProgressBar autoPinWidthToSuperview];
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[videoProgressBar autoPinEdgeToSuperviewSafeArea:ALEdgeTop];
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CGFloat kVideoProgressBarHeight = 44;
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[videoProgressBar autoSetDimension:ALDimensionHeight toSize:kVideoProgressBarHeight];
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UIButton *playVideoButton = [UIButton new];
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self.playVideoButton = playVideoButton;
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[playVideoButton addTarget:self action:@selector(playVideo) forControlEvents:UIControlEventTouchUpInside];
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UIImage *playImage = [UIImage imageNamed:@"CirclePlay"];
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[playVideoButton setBackgroundImage:playImage forState:UIControlStateNormal];
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playVideoButton.contentMode = UIViewContentModeScaleAspectFill;
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[self.view addSubview:playVideoButton];
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CGFloat playVideoButtonWidth = 72.f;
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[playVideoButton autoSetDimensionsToSize:CGSizeMake(playVideoButtonWidth, playVideoButtonWidth)];
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[playVideoButton autoCenterInSuperview];
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}
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}
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- (UIView *)buildVideoPlayerView
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{
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NSURL *_Nullable attachmentUrl = self.attachmentStream.originalMediaURL;
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NSFileManager *fileManager = [NSFileManager defaultManager];
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if (![fileManager fileExistsAtPath:[attachmentUrl path]]) {
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OWSFailDebug(@"Missing video file");
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}
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OWSVideoPlayer *player = [[OWSVideoPlayer alloc] initWithUrl:attachmentUrl];
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[player seekToTime:kCMTimeZero];
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player.delegate = self;
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self.videoPlayer = player;
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VideoPlayerView *playerView = [VideoPlayerView new];
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playerView.player = player.avPlayer;
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[NSLayoutConstraint autoSetPriority:UILayoutPriorityDefaultLow
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forConstraints:^{
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[playerView autoSetDimensionsToSize:self.image.size];
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}];
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return playerView;
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}
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- (void)setShouldHideToolbars:(BOOL)shouldHideToolbars
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{
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self.videoProgressBar.hidden = shouldHideToolbars;
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}
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- (void)addGestureRecognizersToView:(UIView *)view
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{
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UITapGestureRecognizer *doubleTap =
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[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(didDoubleTapImage:)];
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doubleTap.numberOfTapsRequired = 2;
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[view addGestureRecognizer:doubleTap];
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UITapGestureRecognizer *singleTap =
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[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(didSingleTapImage:)];
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[singleTap requireGestureRecognizerToFail:doubleTap];
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[view addGestureRecognizer:singleTap];
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}
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#pragma mark - Gesture Recognizers
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- (void)didSingleTapImage:(UITapGestureRecognizer *)gesture
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{
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[self.delegate mediaDetailViewControllerDidTapMedia:self];
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}
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- (void)didDoubleTapImage:(UITapGestureRecognizer *)gesture
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{
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OWSLogVerbose(@"did double tap image.");
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if (self.scrollView.zoomScale == self.scrollView.minimumZoomScale) {
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CGFloat kDoubleTapZoomScale = 2;
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CGFloat zoomWidth = self.scrollView.width / kDoubleTapZoomScale;
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CGFloat zoomHeight = self.scrollView.height / kDoubleTapZoomScale;
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// center zoom rect around tapLocation
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CGPoint tapLocation = [gesture locationInView:self.scrollView];
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CGFloat zoomX = MAX(0, tapLocation.x - zoomWidth / 2);
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CGFloat zoomY = MAX(0, tapLocation.y - zoomHeight / 2);
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CGRect zoomRect = CGRectMake(zoomX, zoomY, zoomWidth, zoomHeight);
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CGRect translatedRect = [self.mediaView convertRect:zoomRect fromView:self.scrollView];
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[self.scrollView zoomToRect:translatedRect animated:YES];
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} else {
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// If already zoomed in at all, zoom out all the way.
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[self zoomOutAnimated:YES];
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}
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}
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- (void)didPressPlayBarButton:(id)sender
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{
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OWSAssertDebug(self.isVideo);
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OWSAssertDebug(self.videoPlayer);
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[self playVideo];
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}
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- (void)didPressPauseBarButton:(id)sender
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{
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OWSAssertDebug(self.isVideo);
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OWSAssertDebug(self.videoPlayer);
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[self pauseVideo];
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}
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#pragma mark - UIScrollViewDelegate
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- (nullable UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView
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{
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return self.mediaView;
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}
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- (void)centerMediaViewConstraints
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{
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OWSAssertDebug(self.scrollView);
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CGSize scrollViewSize = self.scrollView.bounds.size;
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CGSize imageViewSize = self.mediaView.frame.size;
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CGFloat yOffset = MAX(0, (scrollViewSize.height - imageViewSize.height) / 2);
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self.mediaViewTopConstraint.constant = yOffset;
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self.mediaViewBottomConstraint.constant = yOffset;
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CGFloat xOffset = MAX(0, (scrollViewSize.width - imageViewSize.width) / 2);
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self.mediaViewLeadingConstraint.constant = xOffset;
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self.mediaViewTrailingConstraint.constant = xOffset;
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}
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- (void)scrollViewDidZoom:(UIScrollView *)scrollView
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{
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[self centerMediaViewConstraints];
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[self.view layoutIfNeeded];
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}
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- (void)resetMediaFrame
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{
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// HACK: Setting the frame to itself *seems* like it should be a no-op, but
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// it ensures the content is drawn at the right frame. In particular I was
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// reproducibly seeing some images squished (they were EXIF rotated, maybe
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// related). similar to this report:
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// https://stackoverflow.com/questions/27961884/swift-uiimageview-stretched-aspect
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[self.view layoutIfNeeded];
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self.mediaView.frame = self.mediaView.frame;
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}
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#pragma mark - Video Playback
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- (void)playVideo
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{
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OWSAssertDebug(self.videoPlayer);
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self.playVideoButton.hidden = YES;
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[self.videoPlayer play];
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[self.delegate mediaDetailViewController:self isPlayingVideo:YES];
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}
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- (void)pauseVideo
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{
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OWSAssertDebug(self.isVideo);
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OWSAssertDebug(self.videoPlayer);
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[self.videoPlayer pause];
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[self.delegate mediaDetailViewController:self isPlayingVideo:NO];
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}
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- (void)stopAnyVideo
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{
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if (self.isVideo) {
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[self stopVideo];
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}
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}
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- (void)stopVideo
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{
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OWSAssertDebug(self.isVideo);
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OWSAssertDebug(self.videoPlayer);
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[self.videoPlayer stop];
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self.playVideoButton.hidden = NO;
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[self.delegate mediaDetailViewController:self isPlayingVideo:NO];
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}
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#pragma mark - OWSVideoPlayer
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- (void)videoPlayerDidPlayToCompletion:(OWSVideoPlayer *)videoPlayer
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{
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OWSAssertDebug(self.isVideo);
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OWSAssertDebug(self.videoPlayer);
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OWSLogVerbose(@"");
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[self stopVideo];
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}
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#pragma mark - PlayerProgressBarDelegate
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- (void)playerProgressBarDidStartScrubbing:(PlayerProgressBar *)playerProgressBar
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{
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OWSAssertDebug(self.videoPlayer);
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[self.videoPlayer pause];
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}
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- (void)playerProgressBar:(PlayerProgressBar *)playerProgressBar scrubbedToTime:(CMTime)time
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{
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OWSAssertDebug(self.videoPlayer);
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[self.videoPlayer seekToTime:time];
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}
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- (void)playerProgressBar:(PlayerProgressBar *)playerProgressBar
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didFinishScrubbingAtTime:(CMTime)time
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shouldResumePlayback:(BOOL)shouldResumePlayback
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{
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OWSAssertDebug(self.videoPlayer);
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[self.videoPlayer seekToTime:time];
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if (shouldResumePlayback) {
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[self.videoPlayer play];
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}
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}
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#pragma mark - Saving images to Camera Roll
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- (void)image:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo
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{
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if (error) {
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OWSLogWarn(@"There was a problem saving <%@> to camera roll.", error.localizedDescription);
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}
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}
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@end
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NS_ASSUME_NONNULL_END
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