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mojo/services/window_manager/basic_focus_rules.h

+// Copyright 2014 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.
+
+#ifndef SERVICES_WINDOW_MANAGER_BASIC_FOCUS_RULES_H_
+#define SERVICES_WINDOW_MANAGER_BASIC_FOCUS_RULES_H_
+
+#include "mojo/services/window_manager/focus_rules.h"
+
+namespace mojo {
+class View;
+}
+
+namespace window_manager {
+
+// The focusing rules used inside a window manager.
+//
+// This is intended to be a user supplyable, subclassable component passed to
+// WindowManagerApp, allowing for the creation of other window managers.
+class BasicFocusRules : public FocusRules {
+ public:
+  BasicFocusRules(mojo::View* window_container);
+  ~BasicFocusRules() override;
+
+ protected:
+  // Overridden from mojo::FocusRules:
+  bool SupportsChildActivation(mojo::View* view) const override;
+  bool IsToplevelView(mojo::View* view) const override;
+  bool CanActivateView(mojo::View* view) const override;
+  bool CanFocusView(mojo::View* view) const override;
+  mojo::View* GetToplevelView(mojo::View* view) const override;
+  mojo::View* GetActivatableView(mojo::View* view) const override;
+  mojo::View* GetFocusableView(mojo::View* view) const override;
+  mojo::View* GetNextActivatableView(mojo::View* activatable) const override;
+
+ private:
+  bool CanFocusViewImpl(mojo::View* view) const;
+
+  // Tests to see if |view| is in |window_container_|.
+  bool IsViewParentedToWindowContainer(mojo::View* view) const;
+
+  mojo::View* window_container_;
+
+  DISALLOW_COPY_AND_ASSIGN(BasicFocusRules);
+};
+
+}  // namespace window_manager
+
+#endif  // SERVICES_WINDOW_MANAGER_BASIC_FOCUS_RULES_H_