103 lines
3.1 KiB
Swift
103 lines
3.1 KiB
Swift
import AppKit
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import SwiftUI
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final class HighlightedMenuItemHostView: NSView {
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private var baseView: AnyView
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private let hosting: NSHostingView<AnyView>
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private var targetWidth: CGFloat
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private var tracking: NSTrackingArea?
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private var hovered = false {
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didSet { self.updateHighlight() }
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}
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init(rootView: AnyView, width: CGFloat) {
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self.baseView = rootView
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self.hosting = NSHostingView(rootView: AnyView(rootView.environment(\.menuItemHighlighted, false)))
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self.targetWidth = max(1, width)
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super.init(frame: .zero)
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self.addSubview(self.hosting)
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self.hosting.autoresizingMask = [.width, .height]
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self.updateSizing()
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}
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@available(*, unavailable)
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required init?(coder: NSCoder) { fatalError("init(coder:) has not been implemented") }
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override var intrinsicContentSize: NSSize {
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let size = self.hosting.fittingSize
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return NSSize(width: self.targetWidth, height: size.height)
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}
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override func updateTrackingAreas() {
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super.updateTrackingAreas()
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if let tracking {
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self.removeTrackingArea(tracking)
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}
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let options: NSTrackingArea.Options = [
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.mouseEnteredAndExited,
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.activeAlways,
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.inVisibleRect,
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]
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let area = NSTrackingArea(rect: self.bounds, options: options, owner: self, userInfo: nil)
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self.addTrackingArea(area)
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self.tracking = area
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}
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override func mouseEntered(with event: NSEvent) {
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_ = event
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self.hovered = true
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}
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override func mouseExited(with event: NSEvent) {
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_ = event
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self.hovered = false
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}
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override func layout() {
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super.layout()
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self.hosting.frame = self.bounds
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}
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override func draw(_ dirtyRect: NSRect) {
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if self.hovered {
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NSColor.selectedContentBackgroundColor.setFill()
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self.bounds.fill()
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}
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super.draw(dirtyRect)
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}
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func update(rootView: AnyView, width: CGFloat) {
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self.baseView = rootView
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self.targetWidth = max(1, width)
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self.updateHighlight()
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}
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private func updateHighlight() {
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self.hosting.rootView = AnyView(self.baseView.environment(\.menuItemHighlighted, self.hovered))
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self.updateSizing()
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self.needsDisplay = true
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}
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private func updateSizing() {
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let width = max(1, self.targetWidth)
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self.hosting.frame.size.width = width
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let size = self.hosting.fittingSize
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self.frame = NSRect(origin: .zero, size: NSSize(width: width, height: size.height))
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self.invalidateIntrinsicContentSize()
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}
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}
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struct MenuHostedHighlightedItem: NSViewRepresentable {
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let width: CGFloat
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let rootView: AnyView
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func makeNSView(context _: Context) -> HighlightedMenuItemHostView {
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HighlightedMenuItemHostView(rootView: self.rootView, width: self.width)
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}
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func updateNSView(_ nsView: HighlightedMenuItemHostView, context _: Context) {
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nsView.update(rootView: self.rootView, width: self.width)
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}
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}
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