[infra_ui][overlay] (WIP) Impl new overlay lifecycle actions

app_flowy/packages/flowy_infra_ui/lib/src/overlay/overlay_pannel.dart

@@ -1,37 +1,104 @@
+import 'dart:ui' show window;
+
 import 'package:flutter/material.dart';
 
 import 'overlay_basis.dart';
 import 'overlay_layout_delegate.dart';
 
-class OverlayPannel extends StatelessWidget {
+class OverlayPannel extends StatefulWidget {
   const OverlayPannel({
     Key? key,
-    required this.child,
-    required this.targetRect,
-    required this.anchorRect,
-    this.safeAreaEnabled = true,
-    this.anchorDirection = AnchorDirection.topRight,
-    this.insets = EdgeInsets.zero,
+    this.focusNode,
   }) : super(key: key);
 
-  final AnchorDirection anchorDirection;
-  final bool safeAreaEnabled;
-  final EdgeInsets insets;
-  final Rect targetRect;
-  final Rect anchorRect;
-  final Widget child;
+  final FocusNode? focusNode;
+
+  @override
+  _OverlayPannelState createState() => _OverlayPannelState();
+}
+
+class _OverlayPannelState extends State<OverlayPannel> with WidgetsBindingObserver {
+  FocusNode? _internalNode;
+  FocusNode? get focusNode => widget.focusNode ?? _internalNode;
+  late FocusHighlightMode _focusHighlightMode;
+  bool _hasPrimaryFocus = false;
+
+  @override
+  void initState() {
+    super.initState();
+    if (widget.focusNode == null) {
+      _internalNode ??= _createFocusNode();
+    }
+    focusNode!.addListener(_handleFocusChanged);
+    final FocusManager focusManager = WidgetsBinding.instance!.focusManager;
+    _focusHighlightMode = focusManager.highlightMode;
+    focusManager.addHighlightModeListener(_handleFocusHighlightModeChanged);
+  }
+
+  @override
+  void dispose() {
+    WidgetsBinding.instance!.removeObserver(this);
+    focusNode!.removeListener(_handleFocusChanged);
+    WidgetsBinding.instance!.focusManager.removeHighlightModeListener(_handleFocusHighlightModeChanged);
+    _internalNode?.dispose();
+    super.dispose();
+  }
 
   @override
   Widget build(BuildContext context) {
-    return CustomSingleChildLayout(
-      delegate: OverlayLayoutDelegate(
-        targetRect: targetRect,
-        anchorRect: anchorRect,
-        safeAreaEnabled: safeAreaEnabled,
-        anchorDirection: anchorDirection,
-        insets: insets,
-      ),
-      child: child,
-    );
+    return Container();
+  }
+
+  @override
+  void didUpdateWidget(OverlayPannel oldWidget) {
+    super.didUpdateWidget(oldWidget);
+    if (widget.focusNode != oldWidget.focusNode) {
+      oldWidget.focusNode?.removeListener(_handleFocusChanged);
+      if (widget.focusNode == null) {
+        _internalNode ??= _createFocusNode();
+      }
+      _hasPrimaryFocus = focusNode!.hasPrimaryFocus;
+      focusNode!.addListener(_handleFocusChanged);
+    }
+  }
+
+  // MARK: Focus & Route
+
+  FocusNode _createFocusNode() {
+    return FocusNode(debugLabel: '${widget.runtimeType}');
+  }
+
+  void _handleFocusChanged() {
+    if (_hasPrimaryFocus != focusNode!.hasPrimaryFocus) {
+      setState(() {
+        _hasPrimaryFocus = focusNode!.hasPrimaryFocus;
+      });
+    }
+  }
+
+  void _handleFocusHighlightModeChanged(FocusHighlightMode mode) {
+    if (!mounted) {
+      return;
+    }
+    setState(() {
+      _focusHighlightMode = mode;
+    });
+  }
+
+  void _removeOverlayRoute() {
+    // TODO: junlin
+  }
+
+  // MARK: Layout
+
+  Orientation _getOrientation(BuildContext context) {
+    Orientation? result = MediaQuery.maybeOf(context)?.orientation;
+    if (result == null) {
+      // If there's no MediaQuery, then use the window aspect to determine
+      // orientation.
+      final Size size = window.physicalSize;
+      result = size.width > size.height ? Orientation.landscape : Orientation.portrait;
+    }
+    return result;
   }
 }