metatext/Views/UIKit/EditThumbnailView.swift
2021-03-28 23:04:14 -07:00

214 lines
9.8 KiB
Swift

// Copyright © 2021 Metabolist. All rights reserved.
import BlurHash
import Combine
import SDWebImage
import UIKit
import ViewModels
final class EditThumbnailView: UIView {
let playerView = PlayerView()
let imageView = SDAnimatedImageView()
let previewImageView = SDAnimatedImageView()
let promptBackgroundView = UIVisualEffectView(effect: UIBlurEffect(style: .systemChromeMaterial))
let thumbnailPromptLabel = UILabel()
private let viewModel: AttachmentViewModel
private var cancellables = Set<AnyCancellable>()
private lazy var circleView: UIVisualEffectView = {
let blurEffect = UIBlurEffect(style: .systemUltraThinMaterial)
let circleView = UIVisualEffectView(effect: blurEffect)
let vibrancyView = UIVisualEffectView(effect: UIVibrancyEffect(blurEffect: blurEffect))
let scopeImageView = UIImageView(
image: UIImage(systemName: "scope",
withConfiguration: UIImage.SymbolConfiguration(scale: .medium)))
circleView.translatesAutoresizingMaskIntoConstraints = false
vibrancyView.translatesAutoresizingMaskIntoConstraints = false
scopeImageView.translatesAutoresizingMaskIntoConstraints = false
vibrancyView.contentView.addSubview(scopeImageView)
circleView.contentView.addSubview(vibrancyView)
circleView.layer.cornerRadius = .minimumButtonDimension / 2
circleView.clipsToBounds = true
scopeImageView.contentMode = .scaleAspectFit
NSLayoutConstraint.activate([
scopeImageView.centerXAnchor.constraint(equalTo: circleView.contentView.centerXAnchor),
scopeImageView.centerYAnchor.constraint(equalTo: circleView.contentView.centerYAnchor),
vibrancyView.leadingAnchor.constraint(equalTo: circleView.leadingAnchor),
vibrancyView.topAnchor.constraint(equalTo: circleView.topAnchor),
vibrancyView.trailingAnchor.constraint(equalTo: circleView.trailingAnchor),
vibrancyView.bottomAnchor.constraint(equalTo: circleView.bottomAnchor),
circleView.trailingAnchor.constraint(
equalTo: scopeImageView.trailingAnchor, constant: .compactSpacing),
circleView.bottomAnchor.constraint(
equalTo: scopeImageView.bottomAnchor, constant: .compactSpacing),
scopeImageView.topAnchor.constraint(
equalTo: circleView.topAnchor, constant: .compactSpacing),
scopeImageView.leadingAnchor.constraint(
equalTo: circleView.leadingAnchor, constant: .compactSpacing),
circleView.widthAnchor.constraint(equalToConstant: .minimumButtonDimension),
circleView.heightAnchor.constraint(equalToConstant: .minimumButtonDimension)
])
return circleView
}()
init(viewModel: AttachmentViewModel) {
self.viewModel = viewModel
super.init(frame: .zero)
initialSetup()
}
@available(*, unavailable)
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
super.touchesMoved(touches, with: event)
guard let touch = touches.first else { return }
if promptBackgroundView.effect != nil {
UIView.animate(withDuration: .defaultAnimationDuration) {
self.promptBackgroundView.effect = nil
self.thumbnailPromptLabel.alpha = 0
}
}
let location = touch.location(in: self)
viewModel.editingFocus.x = Double(max(min(((location.x - (bounds.width / 2)) / (bounds.width / 2)), 1), -1))
viewModel.editingFocus.y = Double(max(min((-location.y / (bounds.height / 2)) + 1, 1), -1))
}
}
private extension EditThumbnailView {
// swiftlint:disable:next function_body_length
func initialSetup() {
backgroundColor = .secondarySystemBackground
addSubview(imageView)
imageView.translatesAutoresizingMaskIntoConstraints = false
imageView.contentMode = .scaleAspectFit
imageView.sd_imageIndicator = SDWebImageActivityIndicator.large
addSubview(playerView)
playerView.translatesAutoresizingMaskIntoConstraints = false
addSubview(circleView)
let circleViewCenterXConstraint = circleView.centerXAnchor.constraint(equalTo: centerXAnchor)
let circleViewCenterYConstraint = circleView.centerYAnchor.constraint(equalTo: centerYAnchor)
addSubview(promptBackgroundView)
promptBackgroundView.translatesAutoresizingMaskIntoConstraints = false
if viewModel.editingFocus != .default {
promptBackgroundView.effect = nil
}
promptBackgroundView.contentView.addSubview(thumbnailPromptLabel)
thumbnailPromptLabel.translatesAutoresizingMaskIntoConstraints = false
thumbnailPromptLabel.adjustsFontForContentSizeCategory = true
thumbnailPromptLabel.font = .preferredFont(forTextStyle: .caption1)
thumbnailPromptLabel.numberOfLines = 0
thumbnailPromptLabel.textAlignment = .center
thumbnailPromptLabel.text = NSLocalizedString("attachment.edit.thumbnail.prompt", comment: "")
if viewModel.editingFocus != .default {
thumbnailPromptLabel.alpha = 0
}
let previewImageContainerView = UIView()
addSubview(previewImageContainerView)
previewImageContainerView.translatesAutoresizingMaskIntoConstraints = false
previewImageContainerView.layer.cornerRadius = .defaultCornerRadius
previewImageContainerView.layer.shadowOffset = .zero
previewImageContainerView.layer.shadowRadius = .defaultShadowRadius
previewImageContainerView.layer.shadowOpacity = .defaultShadowOpacity
previewImageContainerView.addSubview(previewImageView)
previewImageView.translatesAutoresizingMaskIntoConstraints = false
previewImageView.contentMode = .scaleAspectFill
previewImageView.clipsToBounds = true
previewImageView.layer.cornerRadius = .defaultCornerRadius
previewImageView.sd_setImage(with: viewModel.attachment.previewUrl?.url)
switch viewModel.attachment.type {
case .image:
playerView.isHidden = true
let placeholderImage: UIImage?
if let blurHash = viewModel.attachment.blurhash {
placeholderImage = UIImage(blurHash: blurHash, size: .blurHashSize)
} else {
placeholderImage = nil
}
imageView.sd_setImage(with: viewModel.attachment.previewUrl?.url, placeholderImage: placeholderImage)
case .gifv:
imageView.isHidden = true
let player = PlayerCache.shared.player(url: viewModel.attachment.url.url)
player.isMuted = true
playerView.player = player
player.play()
default: break
}
NSLayoutConstraint.activate([
imageView.leadingAnchor.constraint(equalTo: leadingAnchor),
imageView.trailingAnchor.constraint(equalTo: trailingAnchor),
imageView.topAnchor.constraint(equalTo: topAnchor),
imageView.bottomAnchor.constraint(equalTo: bottomAnchor),
playerView.leadingAnchor.constraint(equalTo: leadingAnchor),
playerView.trailingAnchor.constraint(equalTo: trailingAnchor),
playerView.topAnchor.constraint(equalTo: topAnchor),
playerView.bottomAnchor.constraint(equalTo: bottomAnchor),
circleViewCenterXConstraint,
circleViewCenterYConstraint,
promptBackgroundView.leadingAnchor.constraint(equalTo: leadingAnchor),
promptBackgroundView.topAnchor.constraint(equalTo: topAnchor),
promptBackgroundView.trailingAnchor.constraint(equalTo: trailingAnchor),
thumbnailPromptLabel.leadingAnchor.constraint(
equalTo: promptBackgroundView.layoutMarginsGuide.leadingAnchor),
thumbnailPromptLabel.topAnchor.constraint(equalTo: promptBackgroundView.layoutMarginsGuide.topAnchor),
thumbnailPromptLabel.trailingAnchor.constraint(
equalTo: promptBackgroundView.layoutMarginsGuide.trailingAnchor),
thumbnailPromptLabel.bottomAnchor.constraint(equalTo: promptBackgroundView.layoutMarginsGuide.bottomAnchor),
previewImageView.leadingAnchor.constraint(equalTo: previewImageContainerView.leadingAnchor),
previewImageView.topAnchor.constraint(equalTo: previewImageContainerView.topAnchor),
previewImageView.trailingAnchor.constraint(equalTo: previewImageContainerView.trailingAnchor),
previewImageView.bottomAnchor.constraint(equalTo: previewImageContainerView.bottomAnchor),
previewImageContainerView.trailingAnchor.constraint(equalTo: layoutMarginsGuide.trailingAnchor),
previewImageContainerView.bottomAnchor.constraint(
equalTo: layoutMarginsGuide.bottomAnchor,
constant: -.defaultSpacing),
previewImageContainerView.widthAnchor.constraint(
equalTo: previewImageContainerView.heightAnchor,
multiplier: 16 / 9),
previewImageContainerView.heightAnchor.constraint(equalTo: heightAnchor, multiplier: 1 / 8)
])
viewModel.$editingFocus
.receive(on: DispatchQueue.main) // punt to next run loop to allow initial layout to happen
.sink { [weak self] in
guard let self = self else { return }
circleViewCenterXConstraint.constant = CGFloat($0.x) * self.bounds.width / 2
circleViewCenterYConstraint.constant = -CGFloat($0.y) * self.bounds.height / 2
guard let mediaSize = self.previewImageView.image?.size else { return }
self.previewImageView.setContentsRect(focus: $0, mediaSize: mediaSize)
}
.store(in: &cancellables)
}
}