mojo/services/view_manager/access_policy.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef MOJO_SERVICES_VIEW_MANAGER_ACCESS_POLICY_H_
   6 #define MOJO_SERVICES_VIEW_MANAGER_ACCESS_POLICY_H_
   7
   8 #include "mojo/services/public/interfaces/view_manager/view_manager_constants.mojom.h"
   9 #include "mojo/services/view_manager/ids.h"
  10
  11 namespace mojo {
  12 namespace service {
  13
  14 class ServerView;
  15
  16 // AccessPolicy is used by ViewManagerServiceImpl to determine what a connection
  17 // is allowed to do.
  18 class AccessPolicy {
  19  public:
  20   virtual ~AccessPolicy() {}
  21
  22   // Unless otherwise mentioned all arguments have been validated. That is the
  23   // |view| arguments are non-null unless otherwise stated (eg CanSetView() is
  24   // allowed to take a NULL view).
  25   virtual bool CanRemoveViewFromParent(const ServerView* view) const = 0;
  26   virtual bool CanAddView(const ServerView* parent,
  27                           const ServerView* child) const = 0;
  28   virtual bool CanReorderView(const ServerView* view,
  29                               const ServerView* relative_view,
  30                               OrderDirection direction) const = 0;
  31   virtual bool CanDeleteView(const ServerView* view) const = 0;
  32   virtual bool CanGetViewTree(const ServerView* view) const = 0;
  33   // Used when building a view tree (GetViewTree()) to decide if we should
  34   // descend into |view|.
  35   virtual bool CanDescendIntoViewForViewTree(const ServerView* view) const = 0;
  36   virtual bool CanEmbed(const ServerView* view) const = 0;
  37   virtual bool CanChangeViewVisibility(const ServerView* view) const = 0;
  38   virtual bool CanSetViewSurfaceId(const ServerView* view) const = 0;
  39   virtual bool CanSetViewBounds(const ServerView* view) const = 0;
  40
  41   // Returns whether the connection should notify on a hierarchy change.
  42   // |new_parent| and |old_parent| are initially set to the new and old parents
  43   // but may be altered so that the client only sees a certain set of views.
  44   virtual bool ShouldNotifyOnHierarchyChange(
  45       const ServerView* view,
  46       const ServerView** new_parent,
  47       const ServerView** old_parent) const = 0;
  48 };
  49
  50 }  // namespace service
  51 }  // namespace mojo
  52
  53 #endif  // MOJO_SERVICES_VIEW_MANAGER_ACCESS_POLICY_H_