NetNewsWire/iOS/MasterTimeline/Cell/MasterTimelineAvatarView.swift

97 lines
2.3 KiB
Swift

//
// MasterTimelineAvatarView.swift
// NetNewsWire-iOS
//
// Created by Maurice Parker on 9/17/19.
// Copyright © 2019 Ranchero Software. All rights reserved.
//
import UIKit
final class MasterTimelineAvatarView: UIView {
var image: UIImage? = nil {
didSet {
if image !== oldValue {
imageView.image = image
setNeedsLayout()
}
}
}
private let imageView: UIImageView = {
let imageView = NonIntrinsicImageView(image: AppAssets.faviconTemplateImage)
imageView.contentMode = .scaleAspectFit
return imageView
}()
private var hasExposedVerticalBackground: Bool {
return imageView.frame.size.height < bounds.size.height
}
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())
if hasExposedVerticalBackground {
backgroundColor = AppAssets.avatarBackgroundColor
} else {
backgroundColor = nil
}
}
}
private extension MasterTimelineAvatarView {
func commonInit() {
addSubview(imageView)
}
func rectForImageView() -> CGRect {
guard let image = 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)
}
}