90 lines
4.1 KiB
Swift
90 lines
4.1 KiB
Swift
//
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// https://mczachurski.dev
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// Copyright © 2023 Marcin Czachurski and the repository contributors.
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// Licensed under the Apache License 2.0.
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//
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import SwiftUI
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struct ImageRow: View {
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private let status: StatusData
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private let attachmentsData: [AttachmentData]
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private let firstAttachment: AttachmentData?
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@State private var imageHeight: Double
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@State private var imageWidth: Double
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@State private var selected: String
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init(statusData: StatusData) {
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self.status = statusData
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self.attachmentsData = statusData.attachments()
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self.firstAttachment = self.attachmentsData.first
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self.selected = String.empty()
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// Calculate size of frame (first from cache, then from real image, then from metadata).
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if let firstAttachment, let size = ImageSizeService.shared.get(for: firstAttachment.url) {
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self.imageWidth = size.width
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self.imageHeight = size.height
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} else if let firstAttachment, firstAttachment.metaImageWidth > 0 && firstAttachment.metaImageHeight > 0 {
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let size = ImageSizeService.shared.calculate(for: firstAttachment.url,
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width: firstAttachment.metaImageWidth,
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height: firstAttachment.metaImageHeight)
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self.imageWidth = size.width
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self.imageHeight = size.height
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} else {
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self.imageHeight = UIScreen.main.bounds.width
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self.imageWidth = UIScreen.main.bounds.width
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}
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}
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var body: some View {
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if self.attachmentsData.count == 1, let firstAttachment = self.firstAttachment {
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ImageRowItem(status: self.status, attachmentData: firstAttachment) { (imageWidth, imageHeight) in
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// When we download image and calculate real size we have to change view size.
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if imageWidth != self.imageWidth || imageHeight != self.imageHeight {
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withAnimation(.linear(duration: 0.4)) {
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self.imageWidth = imageWidth
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self.imageHeight = imageHeight
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}
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}
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}
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.frame(width: self.imageWidth, height: self.imageHeight)
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} else {
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TabView(selection: $selected) {
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ForEach(self.attachmentsData, id: \.id) { attachmentData in
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ImageRowItem(status: self.status, attachmentData: attachmentData) { (imageWidth, imageHeight) in
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// When we download image and calculate real size we have to change view size (only when image is now visible).
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if attachmentData.id == self.selected {
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if imageWidth != self.imageWidth || imageHeight != self.imageHeight {
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withAnimation(.linear(duration: 0.4)) {
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self.imageWidth = imageWidth
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self.imageHeight = imageHeight
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}
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}
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}
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}
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.tag(attachmentData.id)
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}
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}
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.onFirstAppear {
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self.selected = self.attachmentsData.first?.id ?? String.empty()
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}
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.onChange(of: selected, perform: { attachmentId in
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if let attachment = attachmentsData.first(where: { item in item.id == attachmentId }) {
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let doubleImageWidth = Double(attachment.metaImageWidth)
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let doubleImageHeight = Double(attachment.metaImageHeight)
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if doubleImageWidth != self.imageWidth || doubleImageHeight != self.imageHeight {
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withAnimation(.linear(duration: 0.4)) {
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self.imageWidth = doubleImageWidth
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self.imageHeight = doubleImageHeight
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}
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}
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}
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})
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.frame(width: self.imageWidth, height: self.imageHeight)
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.tabViewStyle(PageTabViewStyle())
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}
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}
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}
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