NetNewsWire/iOS/IconView.swift
Dimitris Apostolou ccd76a5354
Fix typos
2024-12-06 18:06:27 +02:00

122 lines
3.0 KiB
Swift

//
// IconView.swift
// NetNewsWire-iOS
//
// Created by Maurice Parker on 9/17/19.
// Copyright © 2019 Ranchero Software. All rights reserved.
//
import UIKit
final class IconView: UIView {
var iconImage: IconImage? = nil {
didSet {
guard iconImage !== oldValue else {
return
}
imageView.image = iconImage?.image
if traitCollection.userInterfaceStyle == .dark {
let isDark = iconImage?.isDark ?? false
isDiscernable = !isDark
}
else {
let isBright = iconImage?.isBright ?? false
isDiscernable = !isBright
}
setNeedsLayout()
}
}
private var isDiscernable = true
private let imageView: UIImageView = {
let imageView = NonIntrinsicImageView(image: AppAssets.faviconTemplateImage)
imageView.contentMode = .scaleAspectFit
imageView.clipsToBounds = true
imageView.layer.cornerRadius = 2.0
return imageView
}()
private var isVerticalBackgroundExposed: Bool {
return imageView.frame.size.height < bounds.size.height
}
private var isSymbolImage: Bool {
return iconImage?.isSymbol ?? false
}
private var isBackgroundSuppressed: Bool {
return iconImage?.isBackgroundSuppressed ?? false
}
override init(frame: CGRect) {
super.init(frame: frame)
commonInit()
}
required init?(coder: NSCoder) {
super.init(coder: coder)
commonInit()
}
convenience init() {
self.init(frame: .zero)
}
override func didMoveToSuperview() {
setNeedsLayout()
}
override func layoutSubviews() {
imageView.setFrameIfNotEqual(rectForImageView())
updateBackgroundColor()
}
}
private extension IconView {
func commonInit() {
layer.cornerRadius = TimelineDefaultCellLayout.iconCornerRadius
clipsToBounds = true
addSubview(imageView)
}
func rectForImageView() -> CGRect {
guard let image = iconImage?.image else {
return CGRect.zero
}
let imageSize = image.size
let viewSize = bounds.size
if imageSize.height == imageSize.width {
if imageSize.height >= viewSize.height * 0.75 {
// Close enough to viewSize to scale up the image.
return CGRect(x: 0.0, y: 0.0, width: viewSize.width, height: viewSize.height)
}
let offset = floor((viewSize.height - imageSize.height) / 2.0)
return CGRect(x: offset, y: offset, width: imageSize.width, height: imageSize.height)
}
else if imageSize.height > imageSize.width {
let factor = viewSize.height / imageSize.height
let width = imageSize.width * factor
let originX = floor((viewSize.width - width) / 2.0)
return CGRect(x: originX, y: 0.0, width: width, height: viewSize.height)
}
// Wider than tall: imageSize.width > imageSize.height
let factor = viewSize.width / imageSize.width
let height = imageSize.height * factor
let originY = floor((viewSize.height - height) / 2.0)
return CGRect(x: 0.0, y: originY, width: viewSize.width, height: height)
}
private func updateBackgroundColor() {
if !isBackgroundSuppressed && ((iconImage != nil && isVerticalBackgroundExposed) || !isDiscernable) {
backgroundColor = AppAssets.iconBackgroundColor
} else {
backgroundColor = nil
}
}
}