Restore enabled state if a "modal" window is destroyed by an owner

ui/views/widget/widget_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <algorithm>
 #include <memory>
 #include <set>
 
 #include "base/bind.h"
 #include "base/macros.h"
@@ skipping 3603 matching lines @@
   EXPECT_FALSE(removals_observer.DidRemoveView(child));
 
   // Moving the child to a different widget should call the removals observer.
   WidgetAutoclosePtr widget2(CreateTopLevelPlatformWidget());
   widget2->client_view()->AddChildView(child);
   EXPECT_TRUE(removals_observer.DidRemoveView(child));
 
   widget->RemoveRemovalsObserver(&removals_observer);
 }
 
+#if defined(OS_WIN)
+
+// Provides functionality to create a window modal dialog.
+class ModalDialogDelegate : public DialogDelegateView {
+public:
+  explicit ModalDialogDelegate(ui::ModalType type) : type_(type) {}
+  ~ModalDialogDelegate() override {}
+
+  // WidgetDelegate overrides.
+  ui::ModalType GetModalType() const override { return type_; }
+
+private:
+  ui::ModalType type_;

[sky, 2016/05/19 16:20:16]

nit: const

[kylix_rd, 2016/05/19 16:43:10]

Done.

+
+  DISALLOW_COPY_AND_ASSIGN(ModalDialogDelegate);
+};
+
+// Tests the case where an intervening owner popup window is destroyed out from
+// under the currently active modal top-level window. In this instance, the
+// remaining top-level windows should be re-enabled

[sky, 2016/05/19 16:20:16]

nit: end with '.'.

[kylix_rd, 2016/05/19 16:43:10]

Done.

+TEST_F(WidgetTest, WindowModalOwnerDestroyedEnabledTest) {
+  // Create a top level widget.
+  Widget top_level_widget;
+  Widget::InitParams init_params =
+    CreateParams(Widget::InitParams::TYPE_WINDOW);
+  init_params.show_state = ui::SHOW_STATE_NORMAL;
+  gfx::Rect initial_bounds(0, 0, 500, 500);
+  init_params.bounds = initial_bounds;
+  init_params.ownership = Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET;
+  init_params.native_widget = CreatePlatformDesktopNativeWidgetImpl(
+    init_params, &top_level_widget, nullptr);
+  top_level_widget.Init(init_params);
+  top_level_widget.Show();
+
+  // Create a modal dialog.
+  // This instance will be destroyed when the dialog is destroyed.

[sky, 2016/05/19 16:20:16]

'this' is confusing here. As the comment is right above owner_dialog_widget, it
seems like it goes with owner_dialog_widget, but that's on the stack. I believe
you want this above dialog_delegate?

[kylix_rd, 2016/05/19 16:43:10]

Done.

+  Widget owner_dialog_widget;
+  ModalDialogDelegate* dialog_delegate =
+    new ModalDialogDelegate(ui::MODAL_TYPE_WINDOW);
+
+  init_params = CreateParams(Widget::InitParams::TYPE_WINDOW);
+  init_params.show_state = ui::SHOW_STATE_NORMAL;
+  init_params.bounds = gfx::Rect(100, 100, 200, 200);
+  init_params.ownership = Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET;
+  init_params.delegate = dialog_delegate;
+  init_params.parent = top_level_widget.GetNativeView();
+  init_params.native_widget = CreatePlatformDesktopNativeWidgetImpl(
+    init_params, &owner_dialog_widget, nullptr);
+  owner_dialog_widget.Init(init_params);
+
+  HWND owner_hwnd = HWNDForWidget(&owner_dialog_widget);
+
+  owner_dialog_widget.Show();
+
+  // Now Create an owned modal dialog

[sky, 2016/05/19 16:20:16]

nit: end with '.'

[kylix_rd, 2016/05/19 16:43:10]

Done.

+  // Like above, this instance will be destroyed when the dialog is destroyed.

[sky, 2016/05/19 16:20:16]

Similar comment. Also, it would more clear if you use a new variable rather than
reusing dialog_delegate.

[kylix_rd, 2016/05/19 16:43:10]

Done.

+  Widget owned_dialog_widget;
+  dialog_delegate =
+    new ModalDialogDelegate(ui::MODAL_TYPE_WINDOW);
+
+  init_params = CreateParams(Widget::InitParams::TYPE_WINDOW);
+  init_params.show_state = ui::SHOW_STATE_NORMAL;
+  init_params.bounds = gfx::Rect(150, 150, 250, 250);
+  init_params.ownership = Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET;
+  init_params.delegate = dialog_delegate;
+  init_params.parent = owner_dialog_widget.GetNativeView();
+  init_params.native_widget = CreatePlatformDesktopNativeWidgetImpl(
+    init_params, &owned_dialog_widget, nullptr);
+  owned_dialog_widget.Init(init_params);
+
+  HWND owned_hwnd = HWNDForWidget(&owned_dialog_widget);
+
+  owned_dialog_widget.Show();
+
+  HWND top_hwnd = HWNDForWidget(&top_level_widget);
+
+  EXPECT_FALSE(!!IsWindowEnabled(owner_hwnd));
+  EXPECT_FALSE(!!IsWindowEnabled(top_hwnd));
+  EXPECT_TRUE(!!IsWindowEnabled(owned_hwnd));
+
+  owner_dialog_widget.CloseNow();
+
+  EXPECT_FALSE(!!IsWindow(owner_hwnd));
+  EXPECT_FALSE(!!IsWindow(owned_hwnd));
+  EXPECT_TRUE(!!IsWindowEnabled(top_hwnd));
+
+  top_level_widget.CloseNow();
+}
+
+#endif
+
 }  // namespace test
 }  // namespace views