Reverts "Remove physical geometry" (flutter/engine#47862)

Reverts flutter/engine#47825
Initiated by: zanderso
This change reverts the following previous change:
Original Description:
Looks like this was proactively added in https://github.com/flutter/engine/pull/20496, but never wired up to anything on any platform. It is also unused in framework and customer code; we never exposed this on e.g. MediaQuery.

Related framework PR: https://github.com/flutter/flutter/pull/138103 (Checks will fail until that PR is submitted).

engine/src/flutter/lib/ui/hooks.dart

@@ -135,7 +135,7 @@ _ViewConfiguration _buildViewConfiguration(
 ) {
   return _ViewConfiguration(
     devicePixelRatio: devicePixelRatio,
-    size: Size(width, height),
+    geometry: Rect.fromLTWH(0.0, 0.0, width, height),
     viewPadding: ViewPadding._(
       top: viewPaddingTop,
       right: viewPaddingRight,

engine/src/flutter/lib/ui/platform_dispatcher.dart

@@ -1462,7 +1462,7 @@ class _PlatformConfiguration {
 class _ViewConfiguration {
   const _ViewConfiguration({
     this.devicePixelRatio = 1.0,
-    this.size = Size.zero,
+    this.geometry = Rect.zero,
     this.viewInsets = ViewPadding.zero,
     this.viewPadding = ViewPadding.zero,
     this.systemGestureInsets = ViewPadding.zero,
@@ -1479,8 +1479,9 @@ class _ViewConfiguration {
   /// The pixel density of the output surface.
   final double devicePixelRatio;
 
-  /// The size requested for the view in logical pixels.
-  final Size size;
+  /// The geometry requested for the view on the screen or within its parent
+  /// window, in logical pixels.
+  final Rect geometry;
 
   /// The number of physical pixels on each side of the display rectangle into
   /// which the view can render, but over which the operating system will likely
@@ -1550,7 +1551,7 @@ class _ViewConfiguration {
 
   @override
   String toString() {
-    return '$runtimeType[size: $size]';
+    return '$runtimeType[geometry: $geometry]';
   }
 }
 

engine/src/flutter/lib/ui/window.dart

@@ -138,6 +138,25 @@ class FlutterView {
   ///    The value here is equal to the value exposed on [display].
   double get devicePixelRatio => _viewConfiguration.devicePixelRatio;
 
+  /// The dimensions and location of the rectangle into which the scene rendered
+  /// in this view will be drawn on the screen, in physical pixels.
+  ///
+  /// When this changes, [PlatformDispatcher.onMetricsChanged] is called.
+  ///
+  /// At startup, the size and location of the view may not be known before Dart
+  /// code runs. If this value is observed early in the application lifecycle,
+  /// it may report [Rect.zero].
+  ///
+  /// This value does not take into account any on-screen keyboards or other
+  /// system UI. The [padding] and [viewInsets] properties provide a view into
+  /// how much of each side of the view may be obscured by system UI.
+  ///
+  /// See also:
+  ///
+  ///  * [WidgetsBindingObserver], for a mechanism at the widgets layer to
+  ///    observe when this value changes.
+  Rect get physicalGeometry => _viewConfiguration.geometry;
+
   /// The dimensions of the rectangle into which the scene rendered in this view
   /// will be drawn on the screen, in physical pixels.
   ///
@@ -160,9 +179,11 @@ class FlutterView {
   ///
   /// See also:
   ///
+  ///  * [physicalGeometry], which reports the location of the view as well as
+  ///    its size.
   ///  * [WidgetsBindingObserver], for a mechanism at the widgets layer to
   ///    observe when this value changes.
-  Size get physicalSize => _viewConfiguration.size;
+  Size get physicalSize => _viewConfiguration.geometry.size;
 
   /// The number of physical pixels on each side of the display rectangle into
   /// which the view can render, but over which the operating system will likely

engine/src/flutter/lib/web_ui/lib/src/engine/platform_dispatcher.dart

@@ -1340,6 +1340,7 @@ class ViewConfiguration {
   const ViewConfiguration({
     this.view,
     this.devicePixelRatio = 1.0,
+    this.geometry = ui.Rect.zero,
     this.visible = false,
     this.viewInsets = ui.ViewPadding.zero as ViewPadding,
     this.viewPadding = ui.ViewPadding.zero as ViewPadding,
@@ -1352,6 +1353,7 @@ class ViewConfiguration {
   ViewConfiguration copyWith({
     EngineFlutterView? view,
     double? devicePixelRatio,
+    ui.Rect? geometry,
     bool? visible,
     ViewPadding? viewInsets,
     ViewPadding? viewPadding,
@@ -1363,6 +1365,7 @@ class ViewConfiguration {
     return ViewConfiguration(
       view: view ?? this.view,
       devicePixelRatio: devicePixelRatio ?? this.devicePixelRatio,
+      geometry: geometry ?? this.geometry,
       visible: visible ?? this.visible,
       viewInsets: viewInsets ?? this.viewInsets,
       viewPadding: viewPadding ?? this.viewPadding,
@@ -1375,6 +1378,7 @@ class ViewConfiguration {
 
   final EngineFlutterView? view;
   final double devicePixelRatio;
+  final ui.Rect geometry;
   final bool visible;
   final ViewPadding viewInsets;
   final ViewPadding viewPadding;
@@ -1385,7 +1389,7 @@ class ViewConfiguration {
 
   @override
   String toString() {
-    return '$runtimeType[view: $view]';
+    return '$runtimeType[view: $view, geometry: $geometry]';
   }
 }
 

engine/src/flutter/lib/web_ui/lib/src/engine/window.dart

@@ -73,6 +73,9 @@ base class EngineFlutterView implements ui.FlutterView {
   late final PlatformViewMessageHandler platformViewMessageHandler =
       PlatformViewMessageHandler(platformViewsContainer: dom.platformViewsHost);
 
+  @override
+  ui.Rect get physicalGeometry => _viewConfiguration.geometry;
+
   @override
   ui.Size get physicalSize {
     if (_physicalSize == null) {

engine/src/flutter/lib/web_ui/lib/window.dart

@@ -15,6 +15,7 @@ abstract class FlutterView {
   PlatformDispatcher get platformDispatcher;
   int get viewId;
   double get devicePixelRatio;
+  Rect get physicalGeometry;
   Size get physicalSize;
   ViewPadding get viewInsets;
   ViewPadding get viewPadding;

engine/src/flutter/shell/common/fixtures/shell_test.dart

@@ -530,7 +530,7 @@ List<int> getCurrentViewWidths() {
   final List<int> result = <int>[];
   for (final FlutterView view in PlatformDispatcher.instance.views) {
     result.add(view.viewId);
-    result.add(view.physicalSize.width.round());
+    result.add(view.physicalGeometry.width.round());
   }
   return result;
 }