320 lines
12 KiB
Swift
320 lines
12 KiB
Swift
//
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// AttachmentsContainerView.swift
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// Tusker
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//
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// Created by Shadowfacts on 6/16/19.
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// Copyright © 2019 Shadowfacts. All rights reserved.
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//
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import UIKit
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import Pachyderm
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class AttachmentsContainerView: UIView {
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var delegate: AttachmentViewDelegate?
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var statusID: String!
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var attachments: [Attachment]!
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let attachmentViews: NSHashTable<AttachmentView> = .weakObjects()
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var blurView: UIVisualEffectView?
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var hideButton: UIButton?
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var contentHidden: Bool! {
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didSet {
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guard let blurView = blurView,
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let hideButton = hideButton else { return }
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blurView.alpha = contentHidden ? 0 : 1
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hideButton.alpha = contentHidden ? 1 : 0
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UIView.animate(withDuration: 0.2) {
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blurView.alpha = self.contentHidden ? 1 : 0
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hideButton.alpha = self.contentHidden ? 0 : 1
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}
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}
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}
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override func awakeFromNib() {
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super.awakeFromNib()
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self.isUserInteractionEnabled = true
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}
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func getAttachmentView(for attachment: Attachment) -> AttachmentView? {
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return attachmentViews.allObjects.first { $0.attachment.id == attachment.id }
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}
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// MARK: - User Interaface
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func updateUI(status: Status) {
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self.statusID = status.id
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attachments = status.attachments.filter { $0.kind == .image || $0.kind == .video }
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attachmentViews.removeAllObjects()
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subviews.forEach { $0.removeFromSuperview() }
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if attachments.count > 0 {
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self.isHidden = false
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var accessibilityElements = [Any]()
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switch attachments.count {
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case 1:
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let attachmentView = createAttachmentView(index: 0)
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fillView(attachmentView)
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accessibilityElements.append(attachmentView)
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case 2:
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let left = createAttachmentView(index: 0)
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let right = createAttachmentView(index: 1)
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fillView(createAttachmentsStack(axis: .horizontal, arrangedSubviews: [
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left,
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right
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]))
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NSLayoutConstraint.activate([
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left.halfWidth()
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])
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accessibilityElements.append(left)
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accessibilityElements.append(right)
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case 3:
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let left = createAttachmentView(index: 0)
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let topRight = createAttachmentView(index: 1)
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let bottomRight = createAttachmentView(index: 2)
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fillView(createAttachmentsStack(axis: .horizontal, arrangedSubviews: [
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left,
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createAttachmentsStack(axis: .vertical, arrangedSubviews: [
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topRight,
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bottomRight
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])
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]))
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NSLayoutConstraint.activate([
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left.halfWidth(),
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topRight.halfHeight(),
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])
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accessibilityElements.append(left)
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accessibilityElements.append(topRight)
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accessibilityElements.append(bottomRight)
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case 4:
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let topLeft = createAttachmentView(index: 0)
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let bottomLeft = createAttachmentView(index: 2)
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let left = createAttachmentsStack(axis: .vertical, arrangedSubviews: [
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topLeft,
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bottomLeft
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])
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let topRight = createAttachmentView(index: 1)
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let bottomRight = createAttachmentView(index: 3)
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fillView(createAttachmentsStack(axis: .horizontal, arrangedSubviews: [
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left,
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createAttachmentsStack(axis: .vertical, arrangedSubviews: [
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topRight,
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bottomRight
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])
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]))
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NSLayoutConstraint.activate([
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left.halfWidth(),
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topLeft.halfHeight(),
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topRight.halfHeight(),
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])
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accessibilityElements.append(topLeft)
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accessibilityElements.append(topRight)
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accessibilityElements.append(bottomLeft)
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accessibilityElements.append(bottomRight)
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default: // more than 4
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let moreView = UIView()
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moreView.backgroundColor = .secondarySystemBackground
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moreView.translatesAutoresizingMaskIntoConstraints = false
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moreView.isUserInteractionEnabled = true
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moreView.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(moreViewTapped)))
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let moreLabel = UILabel()
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moreLabel.text = "\(attachments.count - 3) more..."
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moreLabel.textColor = .secondaryLabel
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moreLabel.textAlignment = .center
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moreLabel.translatesAutoresizingMaskIntoConstraints = false
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moreView.addSubview(moreLabel)
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moreView.accessibilityLabel = moreLabel.text
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let topLeft = createAttachmentView(index: 0)
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let bottomLeft = createAttachmentView(index: 2)
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let left = createAttachmentsStack(axis: .vertical, arrangedSubviews: [
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topLeft,
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bottomLeft
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])
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let topRight = createAttachmentView(index: 1)
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fillView(createAttachmentsStack(axis: .horizontal, arrangedSubviews: [
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left,
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createAttachmentsStack(axis: .vertical, arrangedSubviews: [
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topRight,
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moreView
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])
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]))
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NSLayoutConstraint.activate([
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left.halfWidth(),
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topLeft.halfHeight(),
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topRight.halfHeight(),
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moreView.leadingAnchor.constraint(equalTo: moreLabel.leadingAnchor),
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moreLabel.trailingAnchor.constraint(equalTo: moreView.trailingAnchor),
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moreView.topAnchor.constraint(equalTo: moreLabel.topAnchor),
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moreLabel.bottomAnchor.constraint(equalTo: moreView.bottomAnchor),
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])
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accessibilityElements.append(topLeft)
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accessibilityElements.append(topRight)
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accessibilityElements.append(bottomLeft)
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accessibilityElements.append(moreView)
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}
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self.accessibilityElements = accessibilityElements
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} else {
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self.isHidden = true
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}
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if status.sensitive {
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contentHidden = true
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createBlurView()
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createHideButton()
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}
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}
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private func createAttachmentView(index: Int) -> AttachmentView {
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let attachmentView = AttachmentView(attachment: attachments[index], index: index)
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attachmentView.delegate = delegate
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attachmentView.translatesAutoresizingMaskIntoConstraints = false
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attachmentView.isAccessibilityElement = true
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attachmentView.accessibilityTraits = [.image, .button]
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attachmentView.accessibilityLabel = String(format: NSLocalizedString("Attachment %d", comment: "attachment at index accessiblity label"), index + 1)
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attachmentViews.add(attachmentView)
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return attachmentView
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}
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private func createAttachmentsStack(axis: NSLayoutConstraint.Axis, arrangedSubviews: [UIView]) -> UIStackView {
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let stack = UIStackView(arrangedSubviews: arrangedSubviews)
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stack.axis = axis
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stack.spacing = 4
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stack.translatesAutoresizingMaskIntoConstraints = false
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return stack
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}
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private func createBlurView() {
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let blur = UIBlurEffect(style: .dark)
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let blurView = UIVisualEffectView(effect: blur)
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blurView.effect = blur
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blurView.translatesAutoresizingMaskIntoConstraints = false
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fillView(blurView)
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let vibrancyView = UIVisualEffectView(effect: UIVibrancyEffect(blurEffect: blur, style: .label))
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vibrancyView.translatesAutoresizingMaskIntoConstraints = false
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fillView(vibrancyView, in: blurView.contentView)
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blurView.contentView.addSubview(vibrancyView)
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let image = UIImage(systemName: "eye")!
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let imageView = UIImageView(image: image)
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imageView.translatesAutoresizingMaskIntoConstraints = false
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let label = UILabel()
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label.text = "Sensitive Content"
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let stack = UIStackView(arrangedSubviews: [
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imageView,
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label
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])
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stack.axis = .vertical
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stack.alignment = .center
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stack.translatesAutoresizingMaskIntoConstraints = false
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vibrancyView.contentView.addSubview(stack)
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NSLayoutConstraint.activate([
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imageView.widthAnchor.constraint(equalTo: imageView.heightAnchor, multiplier: image.size.width / image.size.height),
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imageView.widthAnchor.constraint(equalTo: widthAnchor, multiplier: 0.2),
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stack.centerXAnchor.constraint(equalTo: centerXAnchor),
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stack.centerYAnchor.constraint(equalTo: centerYAnchor),
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stack.widthAnchor.constraint(equalTo: widthAnchor)
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])
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self.blurView = blurView
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blurView.isUserInteractionEnabled = true
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blurView.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(blurViewTapped)))
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}
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private func createHideButton() {
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let hideButton = UIButton()
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hideButton.translatesAutoresizingMaskIntoConstraints = false
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hideButton.alpha = 0
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hideButton.layer.cornerRadius = 2
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hideButton.layer.masksToBounds = true
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hideButton.setImage(UIImage(systemName: "eye.slash.fill"), for: .normal)
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hideButton.addTarget(self, action: #selector(hideButtonTapped), for: .touchUpInside)
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addSubview(hideButton)
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NSLayoutConstraint.activate([
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hideButton.topAnchor.constraint(equalTo: topAnchor, constant: 8),
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hideButton.leadingAnchor.constraint(equalTo: leadingAnchor, constant: 8)
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])
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self.hideButton = hideButton
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}
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private func fillView(_ view: UIView, in parentView: UIView? = nil) {
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let parentView = parentView ?? self
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parentView.addSubview(view)
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NSLayoutConstraint.activate([
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view.leadingAnchor.constraint(equalTo: parentView.leadingAnchor),
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view.trailingAnchor.constraint(equalTo: parentView.trailingAnchor),
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view.topAnchor.constraint(equalTo: parentView.topAnchor),
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view.bottomAnchor.constraint(equalTo: parentView.bottomAnchor)
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])
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}
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// MARK: - Interaction
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@objc func blurViewTapped() {
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contentHidden = false
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}
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@objc func hideButtonTapped() {
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contentHidden = true
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}
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@objc func showSensitiveContent() {
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guard let blurView = blurView else { return }
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blurView.alpha = 1
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UIView.animate(withDuration: 0.2) {
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blurView.alpha = 0
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}
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}
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@objc func hideSensitiveContent() {
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guard let blurView = self.blurView else { return }
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blurView.alpha = 0
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UIView.animate(withDuration: 0.2) {
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blurView.alpha = 1
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}
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}
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@objc func moreViewTapped() {
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guard attachments.count > 4 else { return }
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// the more view shows up in place of the fourth attachemtn view, show tapping it should start at the fourth attachment
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delegate?.showAttachmentsGallery(startingAt: 3)
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}
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}
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fileprivate extension UIView {
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enum RelativeSize {
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case full, half
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var multiplier: CGFloat {
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switch self {
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case .full:
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return 1
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case .half:
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return 0.5
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}
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}
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}
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func halfWidth(spacing: CGFloat = 4) -> NSLayoutConstraint {
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return widthAnchor.constraint(equalTo: superview!.widthAnchor, multiplier: 0.5, constant: -spacing / 2)
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}
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func halfHeight(spacing: CGFloat = 4) -> NSLayoutConstraint {
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return heightAnchor.constraint(equalTo: superview!.heightAnchor, multiplier: 0.5, constant: -spacing / 2)
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}
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}
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