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_IDS_H_ 6 #define MOJO_SERVICES_VIEW_MANAGER_IDS_H_ 7 8 #include "mojo/services/public/cpp/view_manager/types.h" 9 #include "mojo/services/public/cpp/view_manager/util.h" 10 11 namespace mojo { 12 namespace service { 13 14 // Connection id is used to indicate no connection. That is, no 15 // ViewManagerServiceImpl ever gets this id. 16 const ConnectionSpecificId kInvalidConnectionId = 0; 17 18 // TODO(sky): remove this, temporary while window manager API is in existing 19 // api. 20 const ConnectionSpecificId kWindowManagerConnection = 1; 21 22 // Adds a bit of type safety to view ids. 23 struct ViewId { 24 ViewId(ConnectionSpecificId connection_id, ConnectionSpecificId view_id) 25 : connection_id(connection_id), 26 view_id(view_id) {} 27 ViewId() : connection_id(0), view_id(0) {} 28 29 bool operator==(const ViewId& other) const { 30 return other.connection_id == connection_id && 31 other.view_id == view_id; 32 } 33 34 bool operator!=(const ViewId& other) const { 35 return !(*this == other); 36 } 37 38 ConnectionSpecificId connection_id; 39 ConnectionSpecificId view_id; 40 }; 41 42 inline ViewId ViewIdFromTransportId(Id id) { 43 return ViewId(HiWord(id), LoWord(id)); 44 } 45 46 inline Id ViewIdToTransportId(const ViewId& id) { 47 return (id.connection_id << 16) | id.view_id; 48 } 49 50 inline ViewId RootViewId() { 51 return ViewId(kInvalidConnectionId, 1); 52 } 53 54 // Returns a ViewId that is reserved to indicate no view. That is, no view will 55 // ever be created with this id. 56 inline ViewId InvalidViewId() { 57 return ViewId(kInvalidConnectionId, 0); 58 } 59 60 } // namespace service 61 } // namespace mojo 62 63 #endif // MOJO_SERVICES_VIEW_MANAGER_IDS_H_ 64
