Remove dangling MediaQuery paddings for non-fullscreen dialogs - 2 (#13438)

* Remove MediaQuery padding for various PopupRoutes that don't extend to the edge of the screen

* bottom sheet doesn't actually need handling. Scaffold does it already. Add test for others.

packages/flutter/lib/src/material/dialog.dart

@@ -427,8 +427,19 @@ class _DialogRoute<T> extends PopupRoute<T> {
 
   @override
   Widget buildPage(BuildContext context, Animation<double> animation, Animation<double> secondaryAnimation) {
+    return new MediaQuery.removePadding(
+      context: context,
+      removeTop: true,
+      removeBottom: true,
+      removeLeft: true,
+      removeRight: true,
+      child: new Builder(
+        builder: (BuildContext context) {
           return theme != null ? new Theme(data: theme, child: child) : child;
         }
+      ),
+    );
+  }
 
   @override
   Widget buildTransitions(BuildContext context, Animation<double> animation, Animation<double> secondaryAnimation, Widget child) {

packages/flutter/lib/src/material/dropdown.dart

@@ -335,6 +335,14 @@ class _DropdownRoute<T> extends PopupRoute<_DropdownRouteResult<T>> {
     if (theme != null)
       menu = new Theme(data: theme, child: menu);
 
+    return new MediaQuery.removePadding(
+      context: context,
+      removeTop: true,
+      removeBottom: true,
+      removeLeft: true,
+      removeRight: true,
+      child: new Builder(
+        builder: (BuildContext context) {
           return new CustomSingleChildLayout(
             delegate: new _DropdownMenuRouteLayout<T>(
               buttonRect: buttonRect,
@@ -344,6 +352,9 @@ class _DropdownRoute<T> extends PopupRoute<_DropdownRouteResult<T>> {
             ),
             child: menu,
           );
+        },
+      ),
+    );
   }
 
   void _dismiss() {

packages/flutter/lib/src/material/popup_menu.dart

@@ -591,7 +591,13 @@ class _PopupMenuRoute<T> extends PopupRoute<T> {
     if (theme != null)
       menu = new Theme(data: theme, child: menu);
 
-    return new Builder(
+    return new MediaQuery.removePadding(
+      context: context,
+      removeTop: true,
+      removeBottom: true,
+      removeLeft: true,
+      removeRight: true,
+      child: new Builder(
         builder: (BuildContext context) {
           return new CustomSingleChildLayout(
             delegate: new _PopupMenuRouteLayout(
@@ -602,6 +608,7 @@ class _PopupMenuRoute<T> extends PopupRoute<T> {
             child: menu,
           );
         },
+      ),
     );
   }
 }

packages/flutter/test/material/dialog_test.dart

@@ -229,4 +229,40 @@ void main() {
 
     semantics.dispose();
   });
+
+  testWidgets('Dialogs removes MediaQuery padding', (WidgetTester tester) async {
+    BuildContext scaffoldContext;
+    BuildContext dialogContext;
+
+    await tester.pumpWidget(new MaterialApp(
+      home: new MediaQuery(
+        data: const MediaQueryData(
+          padding: const EdgeInsets.all(50.0),
+        ),
+        child: new Builder(
+          builder: (BuildContext context) {
+            scaffoldContext = context;
+            return new Container();
+          }
+        ),
+      )
+    ));
+
+    await tester.pump();
+
+    showDialog<Null>(
+      context: scaffoldContext,
+      barrierDismissible: false,
+      child: new Builder(
+        builder: (BuildContext context) {
+          dialogContext = context;
+          return new Container();
+        },
+      ),
+    );
+
+    await tester.pump();
+
+    expect(MediaQuery.of(dialogContext).padding, EdgeInsets.zero);
+  });
 }

packages/flutter/test/material/persistent_bottom_sheet_test.dart

@@ -91,4 +91,46 @@ void main() {
     expect(buildCount, equals(1));
   });
 
+  testWidgets('Scaffold removes top MediaQuery padding', (WidgetTester tester) async {
+    BuildContext scaffoldContext;
+    BuildContext bottomSheetContext;
+
+    await tester.pumpWidget(new MaterialApp(
+      home: new MediaQuery(
+        data: const MediaQueryData(
+          padding: const EdgeInsets.all(50.0),
+        ),
+        child: new Scaffold(
+          resizeToAvoidBottomPadding: false,
+          body: new Builder(
+            builder: (BuildContext context) {
+              scaffoldContext = context;
+              return new Container();
+            }
+          ),
+        ),
+      )
+    ));
+
+    await tester.pump();
+
+    showBottomSheet<Null>(
+      context: scaffoldContext,
+      builder: (BuildContext context) {
+        bottomSheetContext = context;
+        return new Container();
+      },
+    );
+
+    await tester.pump();
+
+    expect(
+      MediaQuery.of(bottomSheetContext).padding,
+      const EdgeInsets.only(
+        bottom: 50.0,
+        left: 50.0,
+        right: 50.0,
+      ),
+    );
+  });
 }

packages/flutter/test/material/popup_menu_test.dart

@@ -315,6 +315,47 @@ void main() {
     await testPositioningDownThenUp(tester, TextDirection.ltr, Alignment.bottomCenter, TextDirection.ltr, new Rect.fromLTWH(350.0, 500.0, 0.0, 0.0));
     await testPositioningDownThenUp(tester, TextDirection.rtl, Alignment.bottomCenter, TextDirection.rtl, new Rect.fromLTWH(450.0, 500.0, 0.0, 0.0));
   });
+
+  testWidgets('PopupMenu removes MediaQuery padding', (WidgetTester tester) async {
+    BuildContext popupContext;
+
+    await tester.pumpWidget(new MaterialApp(
+      home: new MediaQuery(
+        data: const MediaQueryData(
+          padding: const EdgeInsets.all(50.0),
+        ),
+        child: new Material(
+          child: new PopupMenuButton<int>(
+            itemBuilder: (BuildContext context) {
+              popupContext = context;
+              return <PopupMenuItem<int>>[
+                new PopupMenuItem<int>(
+                  value: 1,
+                  child: new Builder(
+                    builder: (BuildContext context) {
+                      popupContext = context;
+                      return const Text('AAA');
+                    },
+                  ),
+                ),
+              ];
+            },
+            child: const SizedBox(
+              height: 100.0,
+              width: 100.0,
+              child: const Text('XXX'),
+            ),
+          ),
+        ),
+      )
+    ));
+
+    await tester.tap(find.text('XXX'));
+
+    await tester.pump();
+
+    expect(MediaQuery.of(popupContext).padding, EdgeInsets.zero);
+  });
 }
 
 class TestApp extends StatefulWidget {