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132 changes: 132 additions & 0 deletions
132
CodeEdit/Features/CodeEditUI/Views/InstantPopoverModifier.swift
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,132 @@ | ||
| // | ||
| // InstantPopoverModifier.swift | ||
| // CodeEdit | ||
| // | ||
| // Created by Kihron on 10/26/24. | ||
| // | ||
|
|
||
| import SwiftUI | ||
|
|
||
| struct InstantPopoverModifier<PopoverContent: View>: ViewModifier { | ||
| @Binding var isPresented: Bool | ||
| let arrowEdge: Edge | ||
| let popoverContent: PopoverContent | ||
|
|
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| func body(content: Content) -> some View { | ||
| content | ||
| .background( | ||
| PopoverPresenter( | ||
| isPresented: $isPresented, | ||
| arrowEdge: arrowEdge, | ||
| contentView: popoverContent | ||
| ) | ||
| ) | ||
| } | ||
| } | ||
|
|
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| struct PopoverPresenter<ContentView: View>: NSViewRepresentable { | ||
| @Binding var isPresented: Bool | ||
| let arrowEdge: Edge | ||
| let contentView: ContentView | ||
|
|
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| func makeNSView(context: Context) -> NSView { NSView() } | ||
|
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| func updateNSView(_ nsView: NSView, context: Context) { | ||
| if isPresented, context.coordinator.popover == nil { | ||
| let popover = NSPopover() | ||
| popover.animates = false | ||
| let hostingController = NSHostingController(rootView: contentView) | ||
|
|
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| hostingController.view.layoutSubtreeIfNeeded() | ||
| let contentSize = hostingController.view.fittingSize | ||
| popover.contentSize = contentSize | ||
|
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| popover.contentViewController = hostingController | ||
| popover.delegate = context.coordinator | ||
| popover.behavior = .semitransient | ||
|
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| let nsRectEdge = edgeToNSRectEdge(arrowEdge) | ||
| popover.show(relativeTo: nsView.bounds, of: nsView, preferredEdge: nsRectEdge) | ||
| context.coordinator.popover = popover | ||
|
|
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| if let parentWindow = nsView.window { | ||
| context.coordinator.startObservingWindow(parentWindow) | ||
| } | ||
| } else if !isPresented, let popover = context.coordinator.popover { | ||
| popover.close() | ||
| context.coordinator.popover = nil | ||
| } | ||
| } | ||
|
|
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| func makeCoordinator() -> Coordinator { | ||
| Coordinator(isPresented: $isPresented) | ||
| } | ||
|
|
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| class Coordinator: NSObject, NSPopoverDelegate { | ||
| @Binding var isPresented: Bool | ||
| var popover: NSPopover? | ||
|
|
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| init(isPresented: Binding<Bool>) { | ||
| _isPresented = isPresented | ||
| super.init() | ||
| } | ||
|
|
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| func startObservingWindow(_ window: NSWindow) { | ||
| /// Observe when the window loses focus | ||
| NotificationCenter.default.addObserver( | ||
| forName: NSWindow.didResignKeyNotification, | ||
| object: window, | ||
| queue: .main | ||
| ) { [weak self] _ in | ||
| guard let self = self else { return } | ||
| /// The parent window is no longer focused, close the popover | ||
| DispatchQueue.main.async { | ||
| self.isPresented = false | ||
| self.popover?.close() | ||
| } | ||
| } | ||
| } | ||
|
|
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| func popoverWillClose(_ notification: Notification) { | ||
| DispatchQueue.main.async { | ||
| self.isPresented = false | ||
| } | ||
| } | ||
|
|
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| func popoverDidClose(_ notification: Notification) { | ||
| popover = nil | ||
| } | ||
| } | ||
|
|
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| private func edgeToNSRectEdge(_ edge: Edge) -> NSRectEdge { | ||
| switch edge { | ||
| case .top: return .minY | ||
| case .leading: return .minX | ||
| case .bottom: return .maxY | ||
| case .trailing: return .maxX | ||
| } | ||
| } | ||
| } | ||
|
|
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| extension View { | ||
|
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| /// A custom view modifier that presents a popover attached to the view with no animation. | ||
| /// - Parameters: | ||
| /// - isPresented: A binding to whether the popover is presented. | ||
| /// - arrowEdge: The edge of the view that the popover points to. Defaults to `.bottom`. | ||
| /// - content: A closure returning the content of the popover. | ||
| /// - Returns: A view that presents a popover when `isPresented` is `true`. | ||
| func instantPopover<Content: View>( | ||
| isPresented: Binding<Bool>, | ||
| arrowEdge: Edge = .bottom, | ||
| @ViewBuilder content: () -> Content | ||
| ) -> some View { | ||
| self.modifier( | ||
| InstantPopoverModifier( | ||
| isPresented: isPresented, | ||
| arrowEdge: arrowEdge, | ||
| popoverContent: content() | ||
| ) | ||
| ) | ||
| } | ||
| } |
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