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// 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 COMPONENTS_VIEW_MANAGER_ACCESS_POLICY_H_
#define COMPONENTS_VIEW_MANAGER_ACCESS_POLICY_H_
#include "components/view_manager/ids.h"
#include "third_party/mojo_services/src/view_manager/public/interfaces/view_manager_constants.mojom.h"
namespace view_manager {
class ServerView;
// AccessPolicy is used by ViewManagerServiceImpl to determine what a connection
// is allowed to do.
class AccessPolicy {
public:
virtual ~AccessPolicy() {}
// Unless otherwise mentioned all arguments have been validated. That is the
// |view| arguments are non-null unless otherwise stated (eg CanSetView() is
// allowed to take a NULL view).
virtual bool CanRemoveViewFromParent(const ServerView* view) const = 0;
virtual bool CanAddView(const ServerView* parent,
const ServerView* child) const = 0;
virtual bool CanReorderView(const ServerView* view,
const ServerView* relative_view,
mojo::OrderDirection direction) const = 0;
virtual bool CanDeleteView(const ServerView* view) const = 0;
virtual bool CanGetViewTree(const ServerView* view) const = 0;
// Used when building a view tree (GetViewTree()) to decide if we should
// descend into |view|.
virtual bool CanDescendIntoViewForViewTree(const ServerView* view) const = 0;
virtual bool CanEmbed(const ServerView* view) const = 0;
virtual bool CanChangeViewVisibility(const ServerView* view) const = 0;
virtual bool CanSetViewSurfaceId(const ServerView* view) const = 0;
virtual bool CanSetViewBounds(const ServerView* view) const = 0;
virtual bool CanSetViewProperties(const ServerView* view) const = 0;
// Returns whether the connection should notify on a hierarchy change.
// |new_parent| and |old_parent| are initially set to the new and old parents
// but may be altered so that the client only sees a certain set of views.
virtual bool ShouldNotifyOnHierarchyChange(
const ServerView* view,
const ServerView** new_parent,
const ServerView** old_parent) const = 0;
};
} // namespace view_manager
#endif // COMPONENTS_VIEW_MANAGER_ACCESS_POLICY_H_
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