mirror of
https://github.com/Swiftgram/Telegram-iOS.git
synced 2025-06-16 05:55:20 +00:00
1317 lines
54 KiB
Swift
1317 lines
54 KiB
Swift
import AsyncDisplayKit
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import Display
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import TelegramCore
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import SyncCore
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import SwiftSignalKit
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import Postbox
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import TelegramPresentationData
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import AccountContext
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import ContextUI
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import PhotoResources
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import RadialStatusNode
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import TelegramStringFormatting
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import GridMessageSelectionNode
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import UniversalMediaPlayer
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import ListMessageItem
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import ChatMessageInteractiveMediaBadge
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private final class FrameSequenceThumbnailNode: ASDisplayNode {
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private let context: AccountContext
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private let file: FileMediaReference
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private let imageNode: ASImageNode
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private var isPlaying: Bool = false
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private var isPlayingInternal: Bool = false
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private var frames: [Int: UIImage] = [:]
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private var frameTimes: [Double] = []
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private var sources: [UniversalSoftwareVideoSource] = []
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private var disposables: [Int: Disposable] = [:]
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private var currentFrameIndex: Int = 0
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private var timer: SwiftSignalKit.Timer?
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init(
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context: AccountContext,
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file: FileMediaReference
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) {
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self.context = context
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self.file = file
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self.imageNode = ASImageNode()
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self.imageNode.isUserInteractionEnabled = false
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self.imageNode.contentMode = .scaleAspectFill
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self.imageNode.clipsToBounds = true
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if let duration = file.media.duration {
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let frameCount = 5
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let frameInterval: Double = Double(duration) / Double(frameCount)
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for i in 0 ..< frameCount {
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self.frameTimes.append(Double(i) * frameInterval)
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}
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}
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super.init()
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self.addSubnode(self.imageNode)
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for i in 0 ..< self.frameTimes.count {
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let framePts = self.frameTimes[i]
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let index = i
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let source = UniversalSoftwareVideoSource(
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mediaBox: self.context.account.postbox.mediaBox,
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fileReference: self.file,
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automaticallyFetchHeader: true
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)
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self.sources.append(source)
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self.disposables[index] = (source.takeFrame(at: framePts)
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|> deliverOnMainQueue).start(next: { [weak self] result in
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guard let strongSelf = self else {
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return
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}
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if case let .image(image) = result {
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if let image = image {
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strongSelf.frames[index] = image
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}
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}
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})
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}
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}
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deinit {
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for (_, disposable) in self.disposables {
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disposable.dispose()
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}
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self.timer?.invalidate()
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}
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func updateIsPlaying(_ isPlaying: Bool) {
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if self.isPlaying == isPlaying {
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return
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}
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self.isPlaying = isPlaying
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}
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func updateLayout(size: CGSize) {
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self.imageNode.frame = CGRect(origin: CGPoint(), size: size)
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}
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func tick() {
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let isPlayingInternal = self.isPlaying && self.frames.count == self.frameTimes.count
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if isPlayingInternal {
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self.currentFrameIndex = (self.currentFrameIndex + 1) % self.frames.count
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if self.currentFrameIndex < self.frames.count {
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self.imageNode.image = self.frames[self.currentFrameIndex]
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}
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}
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}
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}
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private let mediaBadgeBackgroundColor = UIColor(white: 0.0, alpha: 0.6)
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private let mediaBadgeTextColor = UIColor.white
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private final class VisualMediaItemInteraction {
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let openMessage: (Message) -> Void
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let openMessageContextActions: (Message, ASDisplayNode, CGRect, ContextGesture?) -> Void
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let toggleSelection: (MessageId, Bool) -> Void
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var hiddenMedia: [MessageId: [Media]] = [:]
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var selectedMessageIds: Set<MessageId>?
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init(
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openMessage: @escaping (Message) -> Void,
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openMessageContextActions: @escaping (Message, ASDisplayNode, CGRect, ContextGesture?) -> Void,
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toggleSelection: @escaping (MessageId, Bool) -> Void
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) {
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self.openMessage = openMessage
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self.openMessageContextActions = openMessageContextActions
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self.toggleSelection = toggleSelection
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}
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}
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private final class VisualMediaItemNode: ASDisplayNode {
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private let context: AccountContext
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private let interaction: VisualMediaItemInteraction
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private var videoLayerFrameManager: SoftwareVideoLayerFrameManager?
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private var sampleBufferLayer: SampleBufferLayer?
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private var displayLink: ConstantDisplayLinkAnimator?
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private var displayLinkTimestamp: Double = 0.0
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private var frameSequenceThumbnailNode: FrameSequenceThumbnailNode?
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private let containerNode: ContextControllerSourceNode
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private let imageNode: TransformImageNode
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private var statusNode: RadialStatusNode
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private let mediaBadgeNode: ChatMessageInteractiveMediaBadge
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private var selectionNode: GridMessageSelectionNode?
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private let fetchStatusDisposable = MetaDisposable()
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private let fetchDisposable = MetaDisposable()
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private var resourceStatus: MediaResourceStatus?
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private var item: (VisualMediaItem, Media?, CGSize, CGSize?)?
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private var theme: PresentationTheme?
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private var hasVisibility: Bool = false
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init(context: AccountContext, interaction: VisualMediaItemInteraction) {
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self.context = context
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self.interaction = interaction
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self.containerNode = ContextControllerSourceNode()
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self.imageNode = TransformImageNode()
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self.statusNode = RadialStatusNode(backgroundNodeColor: UIColor(white: 0.0, alpha: 0.6))
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let progressDiameter: CGFloat = 40.0
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self.statusNode.frame = CGRect(x: 0.0, y: 0.0, width: progressDiameter, height: progressDiameter)
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self.statusNode.isUserInteractionEnabled = false
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self.mediaBadgeNode = ChatMessageInteractiveMediaBadge()
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self.mediaBadgeNode.frame = CGRect(origin: CGPoint(x: 6.0, y: 6.0), size: CGSize(width: 50.0, height: 50.0))
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super.init()
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self.addSubnode(self.containerNode)
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self.containerNode.addSubnode(self.imageNode)
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self.containerNode.addSubnode(self.mediaBadgeNode)
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self.containerNode.activated = { [weak self] gesture, _ in
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guard let strongSelf = self, let item = strongSelf.item else {
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return
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}
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strongSelf.interaction.openMessageContextActions(item.0.message, strongSelf.containerNode, strongSelf.containerNode.bounds, gesture)
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}
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}
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deinit {
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self.fetchStatusDisposable.dispose()
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self.fetchDisposable.dispose()
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}
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override func didLoad() {
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super.didLoad()
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let recognizer = TapLongTapOrDoubleTapGestureRecognizer(target: self, action: #selector(self.tapGesture(_:)))
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recognizer.tapActionAtPoint = { _ in
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return .waitForSingleTap
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}
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self.imageNode.view.addGestureRecognizer(recognizer)
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self.mediaBadgeNode.pressed = { [weak self] in
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self?.progressPressed()
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}
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}
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@objc func tapGesture(_ recognizer: TapLongTapOrDoubleTapGestureRecognizer) {
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if case .ended = recognizer.state {
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if let (gesture, _) = recognizer.lastRecognizedGestureAndLocation {
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if case .tap = gesture {
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if let (item, _, _, _) = self.item {
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var media: Media?
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for value in item.message.media {
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if let image = value as? TelegramMediaImage {
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media = image
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break
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} else if let file = value as? TelegramMediaFile {
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media = file
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break
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}
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}
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if let media = media {
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if let file = media as? TelegramMediaFile {
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if isMediaStreamable(message: item.message, media: file) {
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self.interaction.openMessage(item.message)
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} else {
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self.progressPressed()
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}
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} else {
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self.interaction.openMessage(item.message)
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}
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}
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}
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}
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}
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}
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}
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private func progressPressed() {
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guard let message = self.item?.0.message else {
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return
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}
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var media: Media?
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for value in message.media {
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if let image = value as? TelegramMediaImage {
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media = image
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break
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} else if let file = value as? TelegramMediaFile {
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media = file
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break
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}
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}
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if let resourceStatus = self.resourceStatus, let file = media as? TelegramMediaFile {
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switch resourceStatus {
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case .Fetching:
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messageMediaFileCancelInteractiveFetch(context: self.context, messageId: message.id, file: file)
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case .Local:
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self.interaction.openMessage(message)
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case .Remote:
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self.fetchDisposable.set(messageMediaFileInteractiveFetched(context: self.context, message: message, file: file, userInitiated: true).start())
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}
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}
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}
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func cancelPreviewGesture() {
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self.containerNode.cancelGesture()
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}
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func update(size: CGSize, item: VisualMediaItem, theme: PresentationTheme, synchronousLoad: Bool) {
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if item === self.item?.0 && size == self.item?.2 {
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return
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}
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self.theme = theme
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var media: Media?
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for value in item.message.media {
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if let image = value as? TelegramMediaImage {
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media = image
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break
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} else if let file = value as? TelegramMediaFile {
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media = file
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break
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}
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}
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if let file = media as? TelegramMediaFile, file.isAnimated {
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if self.videoLayerFrameManager == nil {
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let sampleBufferLayer: SampleBufferLayer
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if let current = self.sampleBufferLayer {
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sampleBufferLayer = current
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} else {
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sampleBufferLayer = takeSampleBufferLayer()
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self.sampleBufferLayer = sampleBufferLayer
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self.imageNode.layer.addSublayer(sampleBufferLayer.layer)
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}
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self.videoLayerFrameManager = SoftwareVideoLayerFrameManager(account: self.context.account, fileReference: FileMediaReference.message(message: MessageReference(item.message), media: file), layerHolder: sampleBufferLayer)
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self.videoLayerFrameManager?.start()
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}
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} else {
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if let sampleBufferLayer = self.sampleBufferLayer {
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sampleBufferLayer.layer.removeFromSuperlayer()
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self.sampleBufferLayer = nil
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}
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self.videoLayerFrameManager = nil
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}
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if let media = media, (self.item?.1 == nil || !media.isEqual(to: self.item!.1!)) {
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var mediaDimensions: CGSize?
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if let image = media as? TelegramMediaImage, let largestSize = largestImageRepresentation(image.representations)?.dimensions {
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mediaDimensions = largestSize.cgSize
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self.imageNode.setSignal(mediaGridMessagePhoto(account: context.account, photoReference: .message(message: MessageReference(item.message), media: image), fullRepresentationSize: CGSize(width: 300.0, height: 300.0), synchronousLoad: synchronousLoad), attemptSynchronously: synchronousLoad, dispatchOnDisplayLink: true)
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self.fetchStatusDisposable.set(nil)
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self.statusNode.transitionToState(.none, completion: { [weak self] in
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self?.statusNode.isHidden = true
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})
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self.mediaBadgeNode.isHidden = true
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self.resourceStatus = nil
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} else if let file = media as? TelegramMediaFile, file.isVideo {
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mediaDimensions = file.dimensions?.cgSize
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self.imageNode.setSignal(mediaGridMessageVideo(postbox: context.account.postbox, videoReference: .message(message: MessageReference(item.message), media: file), synchronousLoad: synchronousLoad, autoFetchFullSizeThumbnail: true), attemptSynchronously: synchronousLoad)
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self.mediaBadgeNode.isHidden = file.isAnimated
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self.resourceStatus = nil
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self.item = (item, media, size, mediaDimensions)
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self.fetchStatusDisposable.set((messageMediaFileStatus(context: context, messageId: item.message.id, file: file)
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|> deliverOnMainQueue).start(next: { [weak self] status in
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if let strongSelf = self, let (item, _, _, _) = strongSelf.item {
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strongSelf.resourceStatus = status
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let isStreamable = isMediaStreamable(message: item.message, media: file)
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var statusState: RadialStatusNodeState = .none
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if isStreamable || file.isAnimated {
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statusState = .none
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} else {
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switch status {
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case let .Fetching(_, progress):
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let adjustedProgress = max(progress, 0.027)
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statusState = .progress(color: .white, lineWidth: nil, value: CGFloat(adjustedProgress), cancelEnabled: true, animateRotation: true)
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case .Local:
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statusState = .none
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case .Remote:
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statusState = .download(.white)
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}
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}
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switch statusState {
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case .none:
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break
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default:
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strongSelf.statusNode.isHidden = false
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}
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strongSelf.statusNode.transitionToState(statusState, animated: true, completion: {
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if let strongSelf = self {
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if case .none = statusState {
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strongSelf.statusNode.isHidden = true
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}
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}
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})
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if let duration = file.duration {
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let durationString = stringForDuration(duration)
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var badgeContent: ChatMessageInteractiveMediaBadgeContent?
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var mediaDownloadState: ChatMessageInteractiveMediaDownloadState?
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if isStreamable {
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switch status {
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case let .Fetching(_, progress):
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let progressString = String(format: "%d%%", Int(progress * 100.0))
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badgeContent = .text(inset: 12.0, backgroundColor: mediaBadgeBackgroundColor, foregroundColor: mediaBadgeTextColor, text: NSAttributedString(string: progressString))
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mediaDownloadState = .compactFetching(progress: 0.0)
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case .Local:
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badgeContent = .text(inset: 0.0, backgroundColor: mediaBadgeBackgroundColor, foregroundColor: mediaBadgeTextColor, text: NSAttributedString(string: durationString))
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case .Remote:
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badgeContent = .text(inset: 12.0, backgroundColor: mediaBadgeBackgroundColor, foregroundColor: mediaBadgeTextColor, text: NSAttributedString(string: durationString))
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mediaDownloadState = .compactRemote
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}
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} else {
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badgeContent = .text(inset: 0.0, backgroundColor: mediaBadgeBackgroundColor, foregroundColor: mediaBadgeTextColor, text: NSAttributedString(string: durationString))
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}
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strongSelf.mediaBadgeNode.update(theme: nil, content: badgeContent, mediaDownloadState: mediaDownloadState, alignment: .right, animated: false, badgeAnimated: false)
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}
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}
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}))
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if self.statusNode.supernode == nil {
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self.imageNode.addSubnode(self.statusNode)
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}
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} else {
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self.mediaBadgeNode.isHidden = true
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}
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self.item = (item, media, size, mediaDimensions)
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let progressDiameter: CGFloat = 40.0
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self.statusNode.frame = CGRect(origin: CGPoint(x: floor((size.width - progressDiameter) / 2.0), y: floor((size.height - progressDiameter) / 2.0)), size: CGSize(width: progressDiameter, height: progressDiameter))
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self.mediaBadgeNode.frame = CGRect(origin: CGPoint(x: size.width - 3.0, y: size.height - 18.0 - 3.0), size: CGSize(width: 50.0, height: 50.0))
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self.selectionNode?.frame = CGRect(origin: CGPoint(), size: size)
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self.updateHiddenMedia()
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}
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if let (item, media, _, mediaDimensions) = self.item {
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self.item = (item, media, size, mediaDimensions)
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let imageFrame = CGRect(origin: CGPoint(), size: size)
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self.containerNode.frame = imageFrame
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self.imageNode.frame = imageFrame
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if let sampleBufferLayer = self.sampleBufferLayer {
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sampleBufferLayer.layer.frame = imageFrame
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}
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if let mediaDimensions = mediaDimensions {
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let imageSize = mediaDimensions.aspectFilled(imageFrame.size)
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self.imageNode.asyncLayout()(TransformImageArguments(corners: ImageCorners(), imageSize: imageSize, boundingSize: imageFrame.size, intrinsicInsets: UIEdgeInsets(), emptyColor: theme.list.mediaPlaceholderColor))()
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}
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self.updateSelectionState(animated: false)
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}
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}
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func updateIsVisible(_ isVisible: Bool) {
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self.hasVisibility = isVisible
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if let _ = self.videoLayerFrameManager {
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let displayLink: ConstantDisplayLinkAnimator
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if let current = self.displayLink {
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displayLink = current
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} else {
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displayLink = ConstantDisplayLinkAnimator { [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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strongSelf.videoLayerFrameManager?.tick(timestamp: strongSelf.displayLinkTimestamp)
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strongSelf.displayLinkTimestamp += 1.0 / 30.0
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}
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displayLink.frameInterval = 2
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self.displayLink = displayLink
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}
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}
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self.displayLink?.isPaused = !self.hasVisibility || self.isHidden
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/*if isVisible {
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if let item = self.item?.0, let file = self.item?.1 as? TelegramMediaFile, !file.isAnimated {
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if self.frameSequenceThumbnailNode == nil {
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let frameSequenceThumbnailNode = FrameSequenceThumbnailNode(context: context, file: .message(message: MessageReference(item.message), media: file))
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self.frameSequenceThumbnailNode = frameSequenceThumbnailNode
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self.imageNode.addSubnode(frameSequenceThumbnailNode)
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}
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if let frameSequenceThumbnailNode = self.frameSequenceThumbnailNode {
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let size = self.bounds.size
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frameSequenceThumbnailNode.frame = CGRect(origin: CGPoint(), size: size)
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frameSequenceThumbnailNode.updateLayout(size: size)
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}
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} else {
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if let frameSequenceThumbnailNode = self.frameSequenceThumbnailNode {
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self.frameSequenceThumbnailNode = nil
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frameSequenceThumbnailNode.removeFromSupernode()
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}
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}
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} else {
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if let frameSequenceThumbnailNode = self.frameSequenceThumbnailNode {
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self.frameSequenceThumbnailNode = nil
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frameSequenceThumbnailNode.removeFromSupernode()
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}
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}*/
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self.frameSequenceThumbnailNode?.updateIsPlaying(isVisible)
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}
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func tick() {
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self.frameSequenceThumbnailNode?.tick()
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}
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func updateSelectionState(animated: Bool) {
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if let (item, _, _, _) = self.item, let theme = self.theme {
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self.containerNode.isGestureEnabled = self.interaction.selectedMessageIds == nil
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if let selectedIds = self.interaction.selectedMessageIds {
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let selected = selectedIds.contains(item.message.id)
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if let selectionNode = self.selectionNode {
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selectionNode.updateSelected(selected, animated: animated)
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selectionNode.frame = CGRect(origin: CGPoint(), size: self.bounds.size)
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} else {
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let selectionNode = GridMessageSelectionNode(theme: theme, toggle: { [weak self] value in
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if let strongSelf = self, let messageId = strongSelf.item?.0.message.id {
|
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var toggledValue = true
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if let selectedMessageIds = strongSelf.interaction.selectedMessageIds, selectedMessageIds.contains(messageId) {
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toggledValue = false
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}
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strongSelf.interaction.toggleSelection(messageId, toggledValue)
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}
|
|
})
|
|
|
|
selectionNode.frame = CGRect(origin: CGPoint(), size: self.bounds.size)
|
|
self.containerNode.addSubnode(selectionNode)
|
|
self.selectionNode = selectionNode
|
|
selectionNode.updateSelected(selected, animated: false)
|
|
if animated {
|
|
selectionNode.animateIn()
|
|
}
|
|
}
|
|
} else {
|
|
if let selectionNode = self.selectionNode {
|
|
self.selectionNode = nil
|
|
if animated {
|
|
selectionNode.animateOut { [weak selectionNode] in
|
|
selectionNode?.removeFromSupernode()
|
|
}
|
|
} else {
|
|
selectionNode.removeFromSupernode()
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func transitionNode() -> (ASDisplayNode, CGRect, () -> (UIView?, UIView?))? {
|
|
let imageNode = self.imageNode
|
|
return (self.imageNode, self.imageNode.bounds, { [weak self, weak imageNode] in
|
|
var statusNodeHidden = false
|
|
var accessoryHidden = false
|
|
if let strongSelf = self {
|
|
statusNodeHidden = strongSelf.statusNode.isHidden
|
|
accessoryHidden = strongSelf.mediaBadgeNode.isHidden
|
|
strongSelf.statusNode.isHidden = true
|
|
strongSelf.mediaBadgeNode.isHidden = true
|
|
}
|
|
let view = imageNode?.view.snapshotView(afterScreenUpdates: false)
|
|
if let strongSelf = self {
|
|
strongSelf.statusNode.isHidden = statusNodeHidden
|
|
strongSelf.mediaBadgeNode.isHidden = accessoryHidden
|
|
}
|
|
return (view, nil)
|
|
})
|
|
}
|
|
|
|
func updateHiddenMedia() {
|
|
if let (item, _, _, _) = self.item {
|
|
if let _ = self.interaction.hiddenMedia[item.message.id] {
|
|
self.isHidden = true
|
|
} else {
|
|
self.isHidden = false
|
|
}
|
|
} else {
|
|
self.isHidden = false
|
|
}
|
|
self.displayLink?.isPaused = !self.hasVisibility || self.isHidden
|
|
}
|
|
}
|
|
|
|
private final class VisualMediaItem {
|
|
let message: Message
|
|
let dimensions: CGSize
|
|
let aspectRatio: CGFloat
|
|
|
|
init(message: Message) {
|
|
self.message = message
|
|
|
|
var aspectRatio: CGFloat = 1.0
|
|
var dimensions = CGSize(width: 100.0, height: 100.0)
|
|
for media in message.media {
|
|
if let file = media as? TelegramMediaFile {
|
|
if let dimensionsValue = file.dimensions, dimensions.height > 1 {
|
|
dimensions = dimensionsValue.cgSize
|
|
aspectRatio = CGFloat(dimensionsValue.width) / CGFloat(dimensionsValue.height)
|
|
}
|
|
}
|
|
}
|
|
self.aspectRatio = aspectRatio
|
|
self.dimensions = dimensions
|
|
}
|
|
}
|
|
|
|
private final class FloatingHeaderNode: ASDisplayNode {
|
|
private let backgroundNode: ASImageNode
|
|
private let labelNode: ImmediateTextNode
|
|
|
|
private var currentParams: (constrainedWidth: CGFloat, year: Int32, month: Int32, theme: PresentationTheme)?
|
|
private var currentSize: CGSize?
|
|
|
|
override init() {
|
|
self.backgroundNode = ASImageNode()
|
|
self.backgroundNode.displaysAsynchronously = false
|
|
self.backgroundNode.displayWithoutProcessing = true
|
|
|
|
self.labelNode = ImmediateTextNode()
|
|
self.labelNode.displaysAsynchronously = false
|
|
|
|
super.init()
|
|
|
|
self.addSubnode(self.backgroundNode)
|
|
self.addSubnode(self.labelNode)
|
|
}
|
|
|
|
func update(constrainedWidth: CGFloat, year: Int32, month: Int32, theme: PresentationTheme, strings: PresentationStrings) -> CGSize {
|
|
if let currentParams = self.currentParams, let currentSize = self.currentSize {
|
|
if currentParams.constrainedWidth == constrainedWidth &&
|
|
currentParams.year == year &&
|
|
currentParams.month == month &&
|
|
currentParams.theme === theme {
|
|
return currentSize
|
|
}
|
|
}
|
|
|
|
if self.currentParams?.theme !== theme {
|
|
self.backgroundNode.image = generateStretchableFilledCircleImage(diameter: 27.0, color: mediaBadgeBackgroundColor)
|
|
}
|
|
|
|
self.currentParams = (constrainedWidth, year, month, theme)
|
|
|
|
self.labelNode.attributedText = NSAttributedString(string: stringForMonth(strings: strings, month: month, ofYear: year), font: Font.regular(14.0), textColor: .white)
|
|
let labelSize = self.labelNode.updateLayout(CGSize(width: constrainedWidth, height: .greatestFiniteMagnitude))
|
|
|
|
let sideInset: CGFloat = 10.0
|
|
self.labelNode.frame = CGRect(origin: CGPoint(x: sideInset, y: floor((27.0 - labelSize.height) / 2.0)), size: labelSize)
|
|
self.backgroundNode.frame = CGRect(origin: CGPoint(), size: CGSize(width: labelSize.width + sideInset * 2.0, height: 27.0))
|
|
|
|
let size = CGSize(width: labelSize.width + sideInset * 2.0, height: 27.0)
|
|
return size
|
|
}
|
|
}
|
|
|
|
private func tagMaskForType(_ type: PeerInfoVisualMediaPaneNode.ContentType) -> MessageTags {
|
|
switch type {
|
|
case .photoOrVideo:
|
|
return .photoOrVideo
|
|
case .gifs:
|
|
return .gif
|
|
}
|
|
}
|
|
|
|
private enum ItemsLayout {
|
|
final class Grid {
|
|
let containerWidth: CGFloat
|
|
let itemCount: Int
|
|
let itemSpacing: CGFloat
|
|
let itemsInRow: Int
|
|
let itemSize: CGFloat
|
|
let rowCount: Int
|
|
let contentHeight: CGFloat
|
|
|
|
init(containerWidth: CGFloat, itemCount: Int, bottomInset: CGFloat) {
|
|
self.containerWidth = containerWidth
|
|
self.itemCount = itemCount
|
|
self.itemSpacing = 1.0
|
|
self.itemsInRow = max(3, min(6, Int(containerWidth / 140.0)))
|
|
self.itemSize = floor(containerWidth / CGFloat(itemsInRow))
|
|
|
|
self.rowCount = itemCount / self.itemsInRow + (itemCount % self.itemsInRow == 0 ? 0 : 1)
|
|
|
|
self.contentHeight = CGFloat(self.rowCount + 1) * self.itemSpacing + CGFloat(rowCount) * itemSize + bottomInset
|
|
}
|
|
|
|
func visibleRange(rect: CGRect) -> (Int, Int) {
|
|
var minVisibleRow = Int(floor((rect.minY - self.itemSpacing) / (self.itemSize + self.itemSpacing)))
|
|
minVisibleRow = max(0, minVisibleRow)
|
|
var maxVisibleRow = Int(ceil((rect.maxY - self.itemSpacing) / (self.itemSize + itemSpacing)))
|
|
maxVisibleRow = min(self.rowCount - 1, maxVisibleRow)
|
|
|
|
let minVisibleIndex = minVisibleRow * itemsInRow
|
|
let maxVisibleIndex = min(self.itemCount - 1, (maxVisibleRow + 1) * itemsInRow - 1)
|
|
|
|
return (minVisibleIndex, maxVisibleIndex)
|
|
}
|
|
|
|
func frame(forItemAt index: Int, sideInset: CGFloat) -> CGRect {
|
|
let rowIndex = index / Int(self.itemsInRow)
|
|
let columnIndex = index % Int(self.itemsInRow)
|
|
let itemOrigin = CGPoint(x: sideInset + CGFloat(columnIndex) * (self.itemSize + self.itemSpacing), y: self.itemSpacing + CGFloat(rowIndex) * (self.itemSize + self.itemSpacing))
|
|
return CGRect(origin: itemOrigin, size: CGSize(width: columnIndex == self.itemsInRow ? (self.containerWidth - itemOrigin.x) : self.itemSize, height: self.itemSize))
|
|
}
|
|
}
|
|
|
|
final class Balanced {
|
|
let frames: [CGRect]
|
|
let contentHeight: CGFloat
|
|
|
|
init(containerWidth: CGFloat, items: [VisualMediaItem], bottomInset: CGFloat) {
|
|
self.frames = calculateItemFrames(items: items, containerWidth: containerWidth)
|
|
if let last = self.frames.last {
|
|
self.contentHeight = last.maxY + bottomInset
|
|
} else {
|
|
self.contentHeight = bottomInset
|
|
}
|
|
}
|
|
|
|
func visibleRange(rect: CGRect) -> (Int, Int) {
|
|
for i in 0 ..< self.frames.count {
|
|
if self.frames[i].maxY >= rect.minY {
|
|
for j in i ..< self.frames.count {
|
|
if self.frames[j].minY >= rect.maxY {
|
|
return (i, j - 1)
|
|
}
|
|
}
|
|
return (i, self.frames.count - 1)
|
|
}
|
|
}
|
|
return (0, -1)
|
|
}
|
|
|
|
func frame(forItemAt index: Int, sideInset: CGFloat) -> CGRect {
|
|
if index >= 0 && index < self.frames.count {
|
|
return self.frames[index]
|
|
} else {
|
|
assertionFailure()
|
|
return CGRect(origin: CGPoint(), size: CGSize(width: 100.0, height: 100.0))
|
|
}
|
|
}
|
|
}
|
|
|
|
case grid(Grid)
|
|
case balanced(Balanced)
|
|
|
|
var contentHeight: CGFloat {
|
|
switch self {
|
|
case let .grid(grid):
|
|
return grid.contentHeight
|
|
case let .balanced(balanced):
|
|
return balanced.contentHeight
|
|
}
|
|
}
|
|
|
|
func visibleRange(rect: CGRect) -> (Int, Int) {
|
|
switch self {
|
|
case let .grid(grid):
|
|
return grid.visibleRange(rect: rect)
|
|
case let .balanced(balanced):
|
|
return balanced.visibleRange(rect: rect)
|
|
}
|
|
}
|
|
|
|
func frame(forItemAt index: Int, sideInset: CGFloat) -> CGRect {
|
|
switch self {
|
|
case let .grid(grid):
|
|
return grid.frame(forItemAt: index, sideInset: sideInset)
|
|
case let .balanced(balanced):
|
|
return balanced.frame(forItemAt: index, sideInset: sideInset)
|
|
}
|
|
}
|
|
}
|
|
|
|
final class PeerInfoVisualMediaPaneNode: ASDisplayNode, PeerInfoPaneNode, UIScrollViewDelegate {
|
|
enum ContentType {
|
|
case photoOrVideo
|
|
case gifs
|
|
}
|
|
|
|
private let context: AccountContext
|
|
private let peerId: PeerId
|
|
private let chatControllerInteraction: ChatControllerInteraction
|
|
private let contentType: ContentType
|
|
|
|
private let scrollNode: ASScrollNode
|
|
private let floatingHeaderNode: FloatingHeaderNode
|
|
private var flashHeaderDelayTimer: Foundation.Timer?
|
|
private var isDeceleratingAfterTracking = false
|
|
|
|
private var _itemInteraction: VisualMediaItemInteraction?
|
|
private var itemInteraction: VisualMediaItemInteraction {
|
|
return self._itemInteraction!
|
|
}
|
|
|
|
private var currentParams: (size: CGSize, sideInset: CGFloat, bottomInset: CGFloat, visibleHeight: CGFloat, isScrollingLockedAtTop: Bool, expandProgress: CGFloat, presentationData: PresentationData)?
|
|
|
|
private let ready = Promise<Bool>()
|
|
private var didSetReady: Bool = false
|
|
var isReady: Signal<Bool, NoError> {
|
|
return self.ready.get()
|
|
}
|
|
|
|
private let listDisposable = MetaDisposable()
|
|
private var hiddenMediaDisposable: Disposable?
|
|
private var mediaItems: [VisualMediaItem] = []
|
|
private var itemsLayout: ItemsLayout?
|
|
private var visibleMediaItems: [UInt32: VisualMediaItemNode] = [:]
|
|
|
|
private var numberOfItemsToRequest: Int = 50
|
|
private var currentView: MessageHistoryView?
|
|
private var isRequestingView: Bool = false
|
|
private var isFirstHistoryView: Bool = true
|
|
|
|
private var decelerationAnimator: ConstantDisplayLinkAnimator?
|
|
|
|
private var animationTimer: SwiftSignalKit.Timer?
|
|
|
|
init(context: AccountContext, chatControllerInteraction: ChatControllerInteraction, peerId: PeerId, contentType: ContentType) {
|
|
self.context = context
|
|
self.peerId = peerId
|
|
self.chatControllerInteraction = chatControllerInteraction
|
|
self.contentType = contentType
|
|
|
|
self.scrollNode = ASScrollNode()
|
|
self.floatingHeaderNode = FloatingHeaderNode()
|
|
self.floatingHeaderNode.alpha = 0.0
|
|
|
|
super.init()
|
|
|
|
self._itemInteraction = VisualMediaItemInteraction(
|
|
openMessage: { [weak self] message in
|
|
let _ = self?.chatControllerInteraction.openMessage(message, .default)
|
|
},
|
|
openMessageContextActions: { [weak self] message, sourceNode, sourceRect, gesture in
|
|
self?.chatControllerInteraction.openMessageContextActions(message, sourceNode, sourceRect, gesture)
|
|
},
|
|
toggleSelection: { [weak self] id, value in
|
|
self?.chatControllerInteraction.toggleMessagesSelection([id], value)
|
|
}
|
|
)
|
|
self.itemInteraction.selectedMessageIds = chatControllerInteraction.selectionState.flatMap { $0.selectedIds }
|
|
|
|
self.scrollNode.view.delaysContentTouches = false
|
|
self.scrollNode.view.canCancelContentTouches = true
|
|
self.scrollNode.view.showsVerticalScrollIndicator = true
|
|
if #available(iOS 11.0, *) {
|
|
self.scrollNode.view.contentInsetAdjustmentBehavior = .never
|
|
}
|
|
self.scrollNode.view.scrollsToTop = false
|
|
self.scrollNode.view.delegate = self
|
|
|
|
self.addSubnode(self.scrollNode)
|
|
self.addSubnode(self.floatingHeaderNode)
|
|
|
|
self.requestHistoryAroundVisiblePosition()
|
|
|
|
self.hiddenMediaDisposable = context.sharedContext.mediaManager.galleryHiddenMediaManager.hiddenIds().start(next: { [weak self] ids in
|
|
guard let strongSelf = self else {
|
|
return
|
|
}
|
|
var hiddenMedia: [MessageId: [Media]] = [:]
|
|
for id in ids {
|
|
if case let .chat(accountId, messageId, media) = id, accountId == strongSelf.context.account.id {
|
|
hiddenMedia[messageId] = [media]
|
|
}
|
|
}
|
|
strongSelf.itemInteraction.hiddenMedia = hiddenMedia
|
|
for (_, itemNode) in strongSelf.visibleMediaItems {
|
|
itemNode.updateHiddenMedia()
|
|
}
|
|
})
|
|
|
|
let animationTimer = SwiftSignalKit.Timer(timeout: 0.3, repeat: true, completion: { [weak self] in
|
|
guard let strongSelf = self else {
|
|
return
|
|
}
|
|
for (_, itemNode) in strongSelf.visibleMediaItems {
|
|
itemNode.tick()
|
|
}
|
|
}, queue: .mainQueue())
|
|
self.animationTimer = animationTimer
|
|
animationTimer.start()
|
|
}
|
|
|
|
deinit {
|
|
self.listDisposable.dispose()
|
|
self.hiddenMediaDisposable?.dispose()
|
|
self.animationTimer?.invalidate()
|
|
}
|
|
|
|
private func requestHistoryAroundVisiblePosition() {
|
|
if self.isRequestingView {
|
|
return
|
|
}
|
|
self.isRequestingView = true
|
|
self.listDisposable.set((self.context.account.viewTracker.aroundMessageHistoryViewForLocation(.peer(self.peerId), index: .upperBound, anchorIndex: .upperBound, count: self.numberOfItemsToRequest, fixedCombinedReadStates: nil, tagMask: tagMaskForType(self.contentType))
|
|
|> deliverOnMainQueue).start(next: { [weak self] (view, updateType, _) in
|
|
guard let strongSelf = self else {
|
|
return
|
|
}
|
|
strongSelf.updateHistory(view: view, updateType: updateType)
|
|
strongSelf.isRequestingView = false
|
|
}))
|
|
}
|
|
|
|
private func updateHistory(view: MessageHistoryView, updateType: ViewUpdateType) {
|
|
self.currentView = view
|
|
|
|
switch updateType {
|
|
case .FillHole:
|
|
self.requestHistoryAroundVisiblePosition()
|
|
default:
|
|
self.mediaItems.removeAll()
|
|
for entry in view.entries.reversed() {
|
|
self.mediaItems.append(VisualMediaItem(message: entry.message))
|
|
}
|
|
self.itemsLayout = nil
|
|
|
|
let wasFirstHistoryView = self.isFirstHistoryView
|
|
self.isFirstHistoryView = false
|
|
|
|
if let (size, sideInset, bottomInset, visibleHeight, isScrollingLockedAtTop, expandProgress, presentationData) = self.currentParams {
|
|
self.update(size: size, sideInset: sideInset, bottomInset: bottomInset, visibleHeight: visibleHeight, isScrollingLockedAtTop: isScrollingLockedAtTop, expandProgress: expandProgress, presentationData: presentationData, synchronous: wasFirstHistoryView, transition: .immediate)
|
|
if !self.didSetReady {
|
|
self.didSetReady = true
|
|
self.ready.set(.single(true))
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func scrollToTop() -> Bool {
|
|
if self.scrollNode.view.contentOffset.y > 0.0 {
|
|
self.scrollNode.view.setContentOffset(CGPoint(), animated: true)
|
|
return true
|
|
} else {
|
|
return false
|
|
}
|
|
}
|
|
|
|
func findLoadedMessage(id: MessageId) -> Message? {
|
|
for item in self.mediaItems {
|
|
if item.message.id == id {
|
|
return item.message
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func updateHiddenMedia() {
|
|
for (_, itemNode) in self.visibleMediaItems {
|
|
itemNode.updateHiddenMedia()
|
|
}
|
|
}
|
|
|
|
func transferVelocity(_ velocity: CGFloat) {
|
|
if velocity > 0.0 {
|
|
//print("transferVelocity \(velocity)")
|
|
self.decelerationAnimator?.isPaused = true
|
|
let startTime = CACurrentMediaTime()
|
|
var currentOffset = self.scrollNode.view.contentOffset
|
|
let decelerationRate: CGFloat = 0.998
|
|
self.scrollViewDidEndDragging(self.scrollNode.view, willDecelerate: true)
|
|
self.decelerationAnimator = ConstantDisplayLinkAnimator(update: { [weak self] in
|
|
guard let strongSelf = self else {
|
|
return
|
|
}
|
|
let t = CACurrentMediaTime() - startTime
|
|
var currentVelocity = velocity * 15.0 * CGFloat(pow(Double(decelerationRate), 1000.0 * t))
|
|
//print("value at \(t) = \(currentVelocity)")
|
|
currentOffset.y += currentVelocity
|
|
let maxOffset = strongSelf.scrollNode.view.contentSize.height - strongSelf.scrollNode.bounds.height
|
|
if currentOffset.y >= maxOffset {
|
|
currentOffset.y = maxOffset
|
|
currentVelocity = 0.0
|
|
}
|
|
if currentOffset.y < 0.0 {
|
|
currentOffset.y = 0.0
|
|
currentVelocity = 0.0
|
|
}
|
|
|
|
var didEnd = false
|
|
if abs(currentVelocity) < 0.1 {
|
|
strongSelf.decelerationAnimator?.isPaused = true
|
|
strongSelf.decelerationAnimator = nil
|
|
didEnd = true
|
|
}
|
|
var contentOffset = strongSelf.scrollNode.view.contentOffset
|
|
contentOffset.y = floorToScreenPixels(currentOffset.y)
|
|
strongSelf.scrollNode.view.setContentOffset(contentOffset, animated: false)
|
|
strongSelf.scrollViewDidScroll(strongSelf.scrollNode.view)
|
|
if didEnd {
|
|
strongSelf.scrollViewDidEndDecelerating(strongSelf.scrollNode.view)
|
|
}
|
|
})
|
|
self.decelerationAnimator?.isPaused = false
|
|
}
|
|
}
|
|
|
|
func cancelPreviewGestures() {
|
|
for (_, itemNode) in self.visibleMediaItems {
|
|
itemNode.cancelPreviewGesture()
|
|
}
|
|
}
|
|
|
|
func transitionNodeForGallery(messageId: MessageId, media: Media) -> (ASDisplayNode, CGRect, () -> (UIView?, UIView?))? {
|
|
for item in self.mediaItems {
|
|
if item.message.id == messageId {
|
|
if let itemNode = self.visibleMediaItems[item.message.stableId] {
|
|
return itemNode.transitionNode()
|
|
}
|
|
break
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func addToTransitionSurface(view: UIView) {
|
|
self.scrollNode.view.addSubview(view)
|
|
}
|
|
|
|
func updateSelectedMessages(animated: Bool) {
|
|
self.itemInteraction.selectedMessageIds = self.chatControllerInteraction.selectionState.flatMap { $0.selectedIds }
|
|
for (_, itemNode) in self.visibleMediaItems {
|
|
itemNode.updateSelectionState(animated: animated)
|
|
}
|
|
}
|
|
|
|
func update(size: CGSize, sideInset: CGFloat, bottomInset: CGFloat, visibleHeight: CGFloat, isScrollingLockedAtTop: Bool, expandProgress: CGFloat, presentationData: PresentationData, synchronous: Bool, transition: ContainedViewLayoutTransition) {
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let previousParams = self.currentParams
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self.currentParams = (size, sideInset, bottomInset, visibleHeight, isScrollingLockedAtTop, expandProgress, presentationData)
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transition.updateFrame(node: self.scrollNode, frame: CGRect(origin: CGPoint(), size: size))
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let availableWidth = size.width - sideInset * 2.0
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let itemsLayout: ItemsLayout
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if let current = self.itemsLayout, previousParams?.size.width == size.width {
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itemsLayout = current
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} else {
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switch self.contentType {
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case .photoOrVideo, .gifs:
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itemsLayout = .grid(ItemsLayout.Grid(containerWidth: availableWidth, itemCount: self.mediaItems.count, bottomInset: bottomInset))
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/*case .gifs:
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itemsLayout = .balanced(ItemsLayout.Balanced(containerWidth: availableWidth, items: self.mediaItems, bottomInset: bottomInset))*/
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}
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self.itemsLayout = itemsLayout
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}
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self.scrollNode.view.contentSize = CGSize(width: size.width, height: itemsLayout.contentHeight)
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self.updateVisibleItems(size: size, sideInset: sideInset, bottomInset: bottomInset, visibleHeight: visibleHeight, theme: presentationData.theme, strings: presentationData.strings, synchronousLoad: synchronous)
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if isScrollingLockedAtTop {
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if self.scrollNode.view.contentOffset.y > .ulpOfOne {
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transition.updateBounds(node: self.scrollNode, bounds: CGRect(origin: CGPoint(), size: self.scrollNode.bounds.size))
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}
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}
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self.scrollNode.view.isScrollEnabled = !isScrollingLockedAtTop
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}
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func scrollViewWillBeginDragging(_ scrollView: UIScrollView) {
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self.decelerationAnimator?.isPaused = true
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self.decelerationAnimator = nil
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for (_, itemNode) in self.visibleMediaItems {
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itemNode.cancelPreviewGesture()
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}
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self.updateHeaderFlashing(animated: true)
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}
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func scrollViewDidScroll(_ scrollView: UIScrollView) {
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if let (size, sideInset, bottomInset, visibleHeight, _, _, presentationData) = self.currentParams {
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self.updateVisibleItems(size: size, sideInset: sideInset, bottomInset: bottomInset, visibleHeight: visibleHeight, theme: presentationData.theme, strings: presentationData.strings, synchronousLoad: false)
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if scrollView.contentOffset.y >= scrollView.contentSize.height - scrollView.bounds.height * 2.0, let currentView = self.currentView, currentView.earlierId != nil {
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if !self.isRequestingView {
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self.numberOfItemsToRequest += 50
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self.requestHistoryAroundVisiblePosition()
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}
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}
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}
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}
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func scrollViewDidEndDragging(_ scrollView: UIScrollView, willDecelerate decelerate: Bool) {
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if decelerate {
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self.isDeceleratingAfterTracking = true
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self.updateHeaderFlashing(animated: true)
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} else {
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self.isDeceleratingAfterTracking = false
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self.resetHeaderFlashTimer(start: true)
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self.updateHeaderFlashing(animated: true)
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}
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}
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func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) {
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self.isDeceleratingAfterTracking = false
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self.resetHeaderFlashTimer(start: true)
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self.updateHeaderFlashing(animated: true)
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}
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private func updateVisibleItems(size: CGSize, sideInset: CGFloat, bottomInset: CGFloat, visibleHeight: CGFloat, theme: PresentationTheme, strings: PresentationStrings, synchronousLoad: Bool) {
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guard let itemsLayout = self.itemsLayout else {
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return
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}
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let headerItemMinY = self.scrollNode.view.bounds.minY + 20.0
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let activeRect = self.scrollNode.view.bounds
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let visibleRect = activeRect.insetBy(dx: 0.0, dy: -400.0)
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let (minVisibleIndex, maxVisibleIndex) = itemsLayout.visibleRange(rect: visibleRect)
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var headerItem: Message?
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var validIds = Set<UInt32>()
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if minVisibleIndex <= maxVisibleIndex {
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for i in minVisibleIndex ... maxVisibleIndex {
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let stableId = self.mediaItems[i].message.stableId
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validIds.insert(stableId)
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let itemFrame = itemsLayout.frame(forItemAt: i, sideInset: sideInset)
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let itemNode: VisualMediaItemNode
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if let current = self.visibleMediaItems[stableId] {
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itemNode = current
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} else {
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itemNode = VisualMediaItemNode(context: self.context, interaction: self.itemInteraction)
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self.visibleMediaItems[stableId] = itemNode
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self.scrollNode.addSubnode(itemNode)
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}
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itemNode.frame = itemFrame
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if headerItem == nil && itemFrame.maxY > headerItemMinY {
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headerItem = self.mediaItems[i].message
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}
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var itemSynchronousLoad = false
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if itemFrame.maxY <= visibleHeight {
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itemSynchronousLoad = synchronousLoad
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}
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itemNode.update(size: itemFrame.size, item: self.mediaItems[i], theme: theme, synchronousLoad: itemSynchronousLoad)
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itemNode.updateIsVisible(itemFrame.intersects(activeRect))
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}
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}
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var removeKeys: [UInt32] = []
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for (id, _) in self.visibleMediaItems {
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if !validIds.contains(id) {
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removeKeys.append(id)
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}
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}
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for id in removeKeys {
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if let itemNode = self.visibleMediaItems.removeValue(forKey: id) {
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itemNode.removeFromSupernode()
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}
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}
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if let headerItem = headerItem {
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let (year, month) = listMessageDateHeaderInfo(timestamp: headerItem.timestamp)
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let headerSize = self.floatingHeaderNode.update(constrainedWidth: size.width, year: year, month: month, theme: theme, strings: strings)
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self.floatingHeaderNode.frame = CGRect(origin: CGPoint(x: floor((size.width - headerSize.width) / 2.0), y: 7.0), size: headerSize)
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self.floatingHeaderNode.isHidden = false
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} else {
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self.floatingHeaderNode.isHidden = true
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}
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}
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private func resetHeaderFlashTimer(start: Bool, duration: Double = 0.3) {
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if let flashHeaderDelayTimer = self.flashHeaderDelayTimer {
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flashHeaderDelayTimer.invalidate()
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self.flashHeaderDelayTimer = nil
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}
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if start {
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final class TimerProxy: NSObject {
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private let action: () -> ()
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init(_ action: @escaping () -> ()) {
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self.action = action
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super.init()
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}
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@objc func timerEvent() {
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self.action()
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}
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}
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let timer = Timer(timeInterval: duration, target: TimerProxy { [weak self] in
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if let strongSelf = self {
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if let flashHeaderDelayTimer = strongSelf.flashHeaderDelayTimer {
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flashHeaderDelayTimer.invalidate()
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strongSelf.flashHeaderDelayTimer = nil
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strongSelf.updateHeaderFlashing(animated: true)
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}
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}
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}, selector: #selector(TimerProxy.timerEvent), userInfo: nil, repeats: false)
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self.flashHeaderDelayTimer = timer
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RunLoop.main.add(timer, forMode: RunLoop.Mode.common)
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self.updateHeaderFlashing(animated: true)
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}
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}
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private func headerIsFlashing() -> Bool {
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return self.scrollNode.view.isDragging || self.isDeceleratingAfterTracking || self.flashHeaderDelayTimer != nil
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}
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private func updateHeaderFlashing(animated: Bool) {
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let flashing = self.headerIsFlashing()
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let alpha: CGFloat = flashing ? 1.0 : 0.0
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let previousAlpha = self.floatingHeaderNode.alpha
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if !previousAlpha.isEqual(to: alpha) {
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self.floatingHeaderNode.alpha = alpha
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if animated {
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let duration: Double = flashing ? 0.3 : 0.4
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self.floatingHeaderNode.layer.animateAlpha(from: previousAlpha, to: alpha, duration: duration)
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}
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}
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}
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override func hitTest(_ point: CGPoint, with event: UIEvent?) -> UIView? {
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guard let result = super.hitTest(point, with: event) else {
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return nil
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}
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if self.decelerationAnimator != nil {
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self.decelerationAnimator?.isPaused = true
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self.decelerationAnimator = nil
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return self.scrollNode.view
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}
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return result
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}
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}
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private func calculateItemFrames(items: [VisualMediaItem], containerWidth: CGFloat) -> [CGRect] {
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var frames: [CGRect] = []
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var rowsCount = 0
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var firstRowMax = 0;
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let viewPortAvailableSize = containerWidth
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let preferredRowSize: CGFloat = 100.0
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let itemsCount = items.count
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let spanCount: CGFloat = 100.0
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var spanLeft = spanCount
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var currentItemsInRow = 0
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var currentItemsSpanAmount: CGFloat = 0.0
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var itemSpans: [Int: CGFloat] = [:]
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var itemsToRow: [Int: Int] = [:]
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for a in 0 ..< itemsCount {
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var size: CGSize = items[a].dimensions
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if size.width <= 0.0 {
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size.width = 100.0
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}
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if size.height <= 0.0 {
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size.height = 100.0
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}
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let aspect: CGFloat = size.width / size.height
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if aspect > 4.0 || aspect < 0.2 {
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size.width = max(size.width, size.height)
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size.height = size.width
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}
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var requiredSpan = min(spanCount, floor(spanCount * (size.width / size.height * preferredRowSize / viewPortAvailableSize)))
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let moveToNewRow = spanLeft < requiredSpan || requiredSpan > 33.0 && spanLeft < requiredSpan - 15.0
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if moveToNewRow {
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if spanLeft > 0 {
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let spanPerItem = floor(spanLeft / CGFloat(currentItemsInRow))
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let start = a - currentItemsInRow
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var b = start
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while b < start + currentItemsInRow {
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if (b == start + currentItemsInRow - 1) {
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itemSpans[b] = itemSpans[b]! + spanLeft
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} else {
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itemSpans[b] = itemSpans[b]! + spanPerItem
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}
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spanLeft -= spanPerItem;
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b += 1
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}
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itemsToRow[a - 1] = rowsCount
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}
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rowsCount += 1
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currentItemsSpanAmount = 0
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currentItemsInRow = 0
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spanLeft = spanCount
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} else {
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if spanLeft < requiredSpan {
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requiredSpan = spanLeft
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}
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}
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if rowsCount == 0 {
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firstRowMax = max(firstRowMax, a)
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}
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if a == itemsCount - 1 {
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itemsToRow[a] = rowsCount
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}
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currentItemsSpanAmount += requiredSpan
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currentItemsInRow += 1
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spanLeft -= requiredSpan
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spanLeft = max(0, spanLeft)
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|
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itemSpans[a] = requiredSpan
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}
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if itemsCount != 0 {
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rowsCount += 1
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}
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var verticalOffset: CGFloat = 1.0
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|
|
var currentRowHorizontalOffset: CGFloat = 0.0
|
|
for index in 0 ..< items.count {
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guard let width = itemSpans[index] else {
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continue
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}
|
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let itemWidth = floor(width * containerWidth / 100.0) - 1
|
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|
|
var itemSize = CGSize(width: itemWidth, height: preferredRowSize)
|
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if itemsToRow[index] != nil && currentRowHorizontalOffset + itemSize.width >= containerWidth - 10.0 {
|
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itemSize.width = max(itemSize.width, containerWidth - currentRowHorizontalOffset)
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}
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frames.append(CGRect(origin: CGPoint(x: currentRowHorizontalOffset, y: verticalOffset), size: itemSize))
|
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currentRowHorizontalOffset += itemSize.width + 1.0
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|
if itemsToRow[index] != nil {
|
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verticalOffset += preferredRowSize + 1.0
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currentRowHorizontalOffset = 0.0
|
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}
|
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}
|
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return frames
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}
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