343 lines
12 KiB
Swift
343 lines
12 KiB
Swift
//
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// Copyright (c) 2018 Open Whisper Systems. All rights reserved.
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//
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import Foundation
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@objc
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public class ConversationMediaView: UIView {
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// MARK: - Dependencies
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private var attachmentDownloads: OWSAttachmentDownloads {
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return SSKEnvironment.shared.attachmentDownloads
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}
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// MARK: -
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private let mediaCache: NSCache<NSString, AnyObject>
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private let attachment: TSAttachment
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private let isOutgoing: Bool
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private let maxMessageWidth: CGFloat
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private var loadBlock : (() -> Void)?
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private var unloadBlock : (() -> Void)?
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private var didFailToLoad = false
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@objc
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public required init(mediaCache: NSCache<NSString, AnyObject>,
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attachment: TSAttachment,
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isOutgoing: Bool,
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maxMessageWidth: CGFloat) {
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self.mediaCache = mediaCache
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self.attachment = attachment
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self.isOutgoing = isOutgoing
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self.maxMessageWidth = maxMessageWidth
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super.init(frame: .zero)
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backgroundColor = Theme.offBackgroundColor
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clipsToBounds = true
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createContents()
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}
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@available(*, unavailable, message: "use other init() instead.")
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required public init?(coder aDecoder: NSCoder) {
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notImplemented()
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}
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private func createContents() {
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AssertIsOnMainThread()
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guard let attachmentStream = attachment as? TSAttachmentStream else {
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addDownloadProgressIfNecessary()
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return
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}
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if attachmentStream.isAnimated {
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configureForAnimatedImage(attachmentStream: attachmentStream)
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} else if attachmentStream.isImage {
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configureForStillImage(attachmentStream: attachmentStream)
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} else if attachmentStream.isVideo {
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configureForVideo(attachmentStream: attachmentStream)
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} else {
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// TODO: Handle this case.
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owsFailDebug("Attachment has unexpected type.")
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configureForMissingOrInvalid()
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}
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}
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//
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private func addDownloadProgressIfNecessary() {
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guard let attachmentPointer = attachment as? TSAttachmentPointer else {
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owsFailDebug("Attachment has unexpected type.")
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configureForMissingOrInvalid()
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return
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}
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guard let attachmentId = attachmentPointer.uniqueId else {
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owsFailDebug("Attachment missing unique ID.")
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configureForMissingOrInvalid()
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return
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}
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guard nil != attachmentDownloads.downloadProgress(forAttachmentId: attachmentId) else {
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// Not being downloaded.
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configureForMissingOrInvalid()
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return
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}
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backgroundColor = UIColor.ows_gray05
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let progressView = MediaDownloadView(attachmentId: attachmentId, radius: maxMessageWidth * 0.1)
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self.addSubview(progressView)
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progressView.autoPinEdgesToSuperviewEdges()
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}
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private func addUploadProgressIfNecessary(_ subview: UIView) -> Bool {
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guard isOutgoing else {
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return false
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}
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guard let attachmentStream = attachment as? TSAttachmentStream else {
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return false
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}
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guard let attachmentId = attachmentStream.uniqueId else {
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owsFailDebug("Attachment missing unique ID.")
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configureForMissingOrInvalid()
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return false
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}
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guard !attachmentStream.isUploaded else {
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return false
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}
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let progressView = MediaUploadView(attachmentId: attachmentId, radius: maxMessageWidth * 0.1)
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self.addSubview(progressView)
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progressView.autoPinEdgesToSuperviewEdges()
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return true
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}
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private func configureForAnimatedImage(attachmentStream: TSAttachmentStream) {
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guard let cacheKey = attachmentStream.uniqueId else {
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owsFailDebug("Attachment stream missing unique ID.")
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return
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}
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let animatedImageView = YYAnimatedImageView()
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// We need to specify a contentMode since the size of the image
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// might not match the aspect ratio of the view.
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animatedImageView.contentMode = .scaleAspectFill
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// Use trilinear filters for better scaling quality at
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// some performance cost.
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animatedImageView.layer.minificationFilter = kCAFilterTrilinear
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animatedImageView.layer.magnificationFilter = kCAFilterTrilinear
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animatedImageView.backgroundColor = Theme.offBackgroundColor
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addSubview(animatedImageView)
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animatedImageView.autoPinEdgesToSuperviewEdges()
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addUploadProgressIfNecessary(animatedImageView)
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loadBlock = { [weak self] in
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guard let strongSelf = self else {
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return
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}
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if animatedImageView.image != nil {
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return
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}
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let cachedValue = strongSelf.tryToLoadMedia(loadMediaBlock: { () -> AnyObject? in
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guard attachmentStream.isValidImage else {
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owsFailDebug("Ignoring invalid attachment.")
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return nil
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}
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guard let filePath = attachmentStream.originalFilePath else {
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owsFailDebug("Attachment stream missing original file path.")
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return nil
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}
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let animatedImage = YYImage(contentsOfFile: filePath)
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return animatedImage
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},
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cacheKey: cacheKey,
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canLoadAsync: true)
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guard let image = cachedValue as? YYImage else {
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return
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}
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animatedImageView.image = image
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}
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unloadBlock = {
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animatedImageView.image = nil
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}
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}
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private func configureForStillImage(attachmentStream: TSAttachmentStream) {
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guard let cacheKey = attachmentStream.uniqueId else {
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owsFailDebug("Attachment stream missing unique ID.")
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return
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}
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let stillImageView = UIImageView()
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// We need to specify a contentMode since the size of the image
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// might not match the aspect ratio of the view.
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stillImageView.contentMode = .scaleAspectFill
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// Use trilinear filters for better scaling quality at
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// some performance cost.
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stillImageView.layer.minificationFilter = kCAFilterTrilinear
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stillImageView.layer.magnificationFilter = kCAFilterTrilinear
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stillImageView.backgroundColor = Theme.offBackgroundColor
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addSubview(stillImageView)
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stillImageView.autoPinEdgesToSuperviewEdges()
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addUploadProgressIfNecessary(stillImageView)
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loadBlock = { [weak self] in
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guard let strongSelf = self else {
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return
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}
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if stillImageView.image != nil {
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return
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}
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let cachedValue = strongSelf.tryToLoadMedia(loadMediaBlock: { () -> AnyObject? in
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guard attachmentStream.isValidImage else {
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owsFailDebug("Ignoring invalid attachment.")
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return nil
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}
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return attachmentStream.thumbnailImageMedium(success: { (image) in
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stillImageView.image = image
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}, failure: {
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Logger.error("Could not load thumbnail")
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})
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},
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cacheKey: cacheKey,
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canLoadAsync: true)
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guard let image = cachedValue as? UIImage else {
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return
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}
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stillImageView.image = image
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}
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unloadBlock = {
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stillImageView.image = nil
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}
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}
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private func configureForVideo(attachmentStream: TSAttachmentStream) {
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guard let cacheKey = attachmentStream.uniqueId else {
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owsFailDebug("Attachment stream missing unique ID.")
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return
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}
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let stillImageView = UIImageView()
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// We need to specify a contentMode since the size of the image
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// might not match the aspect ratio of the view.
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stillImageView.contentMode = .scaleAspectFill
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// Use trilinear filters for better scaling quality at
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// some performance cost.
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stillImageView.layer.minificationFilter = kCAFilterTrilinear
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stillImageView.layer.magnificationFilter = kCAFilterTrilinear
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stillImageView.backgroundColor = Theme.offBackgroundColor
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addSubview(stillImageView)
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stillImageView.autoPinEdgesToSuperviewEdges()
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if !addUploadProgressIfNecessary(stillImageView) {
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let videoPlayIcon = UIImage(named: "play_button")
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let videoPlayButton = UIImageView(image: videoPlayIcon)
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stillImageView.addSubview(videoPlayButton)
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videoPlayButton.autoCenterInSuperview()
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}
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loadBlock = { [weak self] in
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guard let strongSelf = self else {
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return
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}
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if stillImageView.image != nil {
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return
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}
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let cachedValue = strongSelf.tryToLoadMedia(loadMediaBlock: { () -> AnyObject? in
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guard attachmentStream.isValidVideo else {
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owsFailDebug("Ignoring invalid attachment.")
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return nil
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}
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return attachmentStream.thumbnailImageMedium(success: { (image) in
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stillImageView.image = image
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}, failure: {
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Logger.error("Could not load thumbnail")
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})
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},
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cacheKey: cacheKey,
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canLoadAsync: true)
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guard let image = cachedValue as? UIImage else {
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return
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}
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stillImageView.image = image
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}
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unloadBlock = {
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stillImageView.image = nil
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}
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}
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private func isFailedDownload() -> Bool {
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guard let attachmentPointer = attachment as? TSAttachmentPointer else {
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return false
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}
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return attachmentPointer.state == .failed
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}
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private func configureForMissingOrInvalid() {
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backgroundColor = UIColor.ows_gray05
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let icon: UIImage
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if isFailedDownload() {
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guard let asset = UIImage(named: "media_retry") else {
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owsFailDebug("Missing image")
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return
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}
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icon = asset
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} else {
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guard let asset = UIImage(named: "media_invalid") else {
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owsFailDebug("Missing image")
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return
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}
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icon = asset
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}
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let iconView = UIImageView(image: icon.withRenderingMode(.alwaysTemplate))
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iconView.tintColor = Theme.primaryColor.withAlphaComponent(0.6)
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self.addSubview(iconView)
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iconView.autoCenterInSuperview()
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}
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private func tryToLoadMedia(loadMediaBlock: @escaping () -> AnyObject?,
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cacheKey: String,
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canLoadAsync: Bool) -> AnyObject? {
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AssertIsOnMainThread()
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guard !didFailToLoad else {
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return nil
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}
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if let media = mediaCache.object(forKey: cacheKey as NSString) {
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Logger.verbose("media cache hit")
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return media
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}
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if let media = loadMediaBlock() {
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Logger.verbose("media cache miss")
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mediaCache.setObject(media, forKey: cacheKey as NSString)
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return media
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}
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guard canLoadAsync else {
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Logger.error("Failed to load media.")
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didFailToLoad = true
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// TODO:
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// [self showAttachmentErrorViewWithMediaView:mediaView];
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return nil
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}
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return nil
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}
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@objc
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public func loadMedia() {
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AssertIsOnMainThread()
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guard let loadBlock = loadBlock else {
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return
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}
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loadBlock()
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}
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@objc
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public func unloadMedia() {
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AssertIsOnMainThread()
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guard let unloadBlock = unloadBlock else {
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return
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}
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unloadBlock()
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}
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}
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