76621a4132
The window-focus signal had no business living on the notifications primitive — it was there because the same NotificationsPlugin happened to observe NSApplication active/resign for its own reasons. Splitting it into a sibling XWindow primitive (with its own WindowPlugin on macOS, ux/window/events) lets future consumers — paused video, deferred-work scheduling, dock badge counts — read focus state without pulling in UNUserNotificationCenter. XNotifications now only exposes notification I/O (show/cancel + tap + authorization). The 'type:focus' event-channel branch is gone.
69 lines
1.9 KiB
Swift
69 lines
1.9 KiB
Swift
import AppKit
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import FlutterMacOS
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/// `ux/window/events`. Reports host-application focus state — emits
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/// `{type: "focus", focused: Bool}` whenever the active NSApplication
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/// flips. Seeded from `NSApp.isActive` when Dart subscribes so the
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/// emitter starts in a deterministic value.
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public class WindowPlugin: NSObject, NativePlugin, FlutterStreamHandler {
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private var eventChannel: FlutterEventChannel?
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private var eventSink: FlutterEventSink?
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public func register(with registrar: FlutterPluginRegistrar) {
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let events = FlutterEventChannel(
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name: "ux/window/events",
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binaryMessenger: registrar.messenger,
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)
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events.setStreamHandler(self)
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eventChannel = events
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observeAppActivation()
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}
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// MARK: - FlutterStreamHandler
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public func onListen(
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withArguments arguments: Any?,
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eventSink events: @escaping FlutterEventSink
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) -> FlutterError? {
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eventSink = events
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emit(["type": "focus", "focused": NSApp.isActive])
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return nil
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}
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public func onCancel(withArguments arguments: Any?) -> FlutterError? {
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eventSink = nil
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return nil
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}
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// MARK: - Observers
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private func observeAppActivation() {
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let nc = NotificationCenter.default
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nc.addObserver(
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self,
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selector: #selector(onDidBecomeActive),
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name: NSApplication.didBecomeActiveNotification,
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object: nil,
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)
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nc.addObserver(
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self,
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selector: #selector(onDidResignActive),
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name: NSApplication.didResignActiveNotification,
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object: nil,
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)
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}
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@objc private func onDidBecomeActive() {
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emit(["type": "focus", "focused": true])
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}
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@objc private func onDidResignActive() {
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emit(["type": "focus", "focused": false])
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}
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private func emit(_ event: [String: Any]) {
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eventSink?(event)
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}
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}
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