NetNewsWire/Mac/MainWindow/Timeline/Cell/TimelineAvatarView.swift

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Swift
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//
// TimelineAvatarView.swift
// NetNewsWire
//
// Created by Brent Simmons on 9/15/19.
// Copyright © 2019 Ranchero Software. All rights reserved.
//
import AppKit
final class TimelineAvatarView: NSView {
var image: NSImage? = nil {
didSet {
if image !== oldValue {
imageView.image = image
needsDisplay = true
needsLayout = true
}
}
}
override var isFlipped: Bool {
return true
}
private let imageView: NSImageView = {
let imageView = NSImageView(frame: NSRect.zero)
imageView.animates = false
imageView.imageAlignment = .alignCenter
imageView.imageScaling = .scaleProportionallyUpOrDown
return imageView
}()
private var hasExposedVerticalBackground: Bool {
return imageView.frame.size.height < bounds.size.height
}
private static var lightBackgroundColor = AppAssets.avatarLightBackgroundColor
private static var darkBackgroundColor = AppAssets.avatarDarkBackgroundColor
override init(frame frameRect: NSRect) {
super.init(frame: frameRect)
commonInit()
}
required init?(coder: NSCoder) {
super.init(coder: coder)
commonInit()
}
convenience init() {
self.init(frame: NSRect.zero)
}
override func viewDidMoveToSuperview() {
needsLayout = true
needsDisplay = true
}
override func layout() {
resizeSubviews(withOldSize: NSZeroSize)
}
override func resizeSubviews(withOldSize oldSize: NSSize) {
imageView.rs_setFrameIfNotEqual(rectForImageView())
}
override func draw(_ dirtyRect: NSRect) {
guard hasExposedVerticalBackground else {
return
}
let color = NSApplication.shared.effectiveAppearance.isDarkMode ? TimelineAvatarView.darkBackgroundColor : TimelineAvatarView.lightBackgroundColor
color.set()
dirtyRect.fill()
}
}
private extension TimelineAvatarView {
func commonInit() {
addSubview(imageView)
wantsLayer = true
}
func rectForImageView() -> NSRect {
guard let image = image else {
return NSRect.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 NSMakeRect(0.0, 0.0, viewSize.width, viewSize.height)
}
let offset = floor((viewSize.height - imageSize.height) / 2.0)
return NSMakeRect(offset, offset, imageSize.width, 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 NSMakeRect(originX, 0.0, width, 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 NSMakeRect(0.0, originY, viewSize.width, height)
}
}