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macos: reliable window focus tracking for surface

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This commit is contained in:
Mitchell Hashimoto
2023-03-15 21:29:20 -07:00
parent 363a03a30d
commit c01e8337bd
1 changed files with 21 additions and 3 deletions
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24
macos/Sources/Ghostty/SurfaceView.swift
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@ -38,24 +38,42 @@ extension Ghostty {
// remains the same, the surface that is being rendered remains the same.
@ObservedObject var surfaceView: SurfaceView
// Maintain whether our view has focus or not
@FocusState private var surfaceFocus: Bool
// https://nilcoalescing.com/blog/DetectFocusedWindowOnMacOS/
@Environment(\.controlActiveState) var controlActiveState
// Maintain whether our window has focus (is key) or not
@State private var windowFocus: Bool = false
// This is true if the terminal is considered "focused". The terminal is focused if
// it is both individually focused and the containing window is key.
private var hasFocus: Bool { surfaceFocus && controlActiveState == .key }
private var hasFocus: Bool { surfaceFocus && windowFocus }
var body: some View {
// We use a GeometryReader to get the frame bounds so that our metal surface
// is up to date. See TerminalSurfaceView for why we don't use the NSView
// resize callback.
GeometryReader { geo in
// We use these notifications to determine when the window our surface is
// attached to is or is not focused.
let pubBecomeKey = NotificationCenter.default.publisher(for: NSWindow.didBecomeKeyNotification)
let pubResign = NotificationCenter.default.publisher(for: NSWindow.didResignKeyNotification)
Surface(view: surfaceView, hasFocus: hasFocus, size: geo.size)
.focused($surfaceFocus)
.focusedValue(\.ghosttySurfaceTitle, surfaceView.title)
.focusedValue(\.ghosttySurfaceView, surfaceView)
.onReceive(pubBecomeKey) { notification in
guard let window = notification.object as? NSWindow else { return }
guard let surfaceWindow = surfaceView.window else { return }
windowFocus = surfaceWindow == window
}
.onReceive(pubResign) { notification in
guard let window = notification.object as? NSWindow else { return }
guard let surfaceWindow = surfaceView.window else { return }
if (surfaceWindow == window) {
windowFocus = false
}
}
}
.ghosttySurfaceView(surfaceView)
}