mojo/services/view_manager/ids.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_IDS_H_
   6 #define MOJO_SERVICES_VIEW_MANAGER_IDS_H_
   7
   8 #include "mojo/services/public/cpp/view_manager/util.h"
   9 #include "mojo/services/public/cpp/view_manager/view_manager_types.h"
  10 #include "mojo/services/view_manager/view_manager_export.h"
  11
  12 namespace mojo {
  13 namespace services {
  14 namespace view_manager {
  15
  16 // Adds a bit of type safety to node ids.
  17 struct MOJO_VIEW_MANAGER_EXPORT NodeId {
  18   NodeId(TransportConnectionId connection_id,
  19          TransportConnectionSpecificNodeId node_id)
  20       : connection_id(connection_id),
  21         node_id(node_id) {}
  22   NodeId() : connection_id(0), node_id(0) {}
  23
  24   bool operator==(const NodeId& other) const {
  25     return other.connection_id == connection_id &&
  26         other.node_id == node_id;
  27   }
  28
  29   bool operator!=(const NodeId& other) const {
  30     return !(*this == other);
  31   }
  32
  33   TransportConnectionId connection_id;
  34   TransportConnectionSpecificNodeId node_id;
  35 };
  36
  37 // Adds a bit of type safety to view ids.
  38 struct MOJO_VIEW_MANAGER_EXPORT ViewId {
  39   ViewId(TransportConnectionId connection_id,
  40          TransportConnectionSpecificViewId view_id)
  41       : connection_id(connection_id),
  42         view_id(view_id) {}
  43   ViewId() : connection_id(0), view_id(0) {}
  44
  45   bool operator==(const ViewId& other) const {
  46     return other.connection_id == connection_id &&
  47         other.view_id == view_id;
  48   }
  49
  50   bool operator!=(const ViewId& other) const {
  51     return !(*this == other);
  52   }
  53
  54   TransportConnectionId connection_id;
  55   TransportConnectionSpecificViewId view_id;
  56 };
  57
  58 // Functions for converting to/from structs and transport values.
  59 inline NodeId NodeIdFromTransportId(TransportNodeId id) {
  60   return NodeId(HiWord(id), LoWord(id));
  61 }
  62
  63 inline TransportNodeId NodeIdToTransportId(const NodeId& id) {
  64   return (id.connection_id << 16) | id.node_id;
  65 }
  66
  67 inline ViewId ViewIdFromTransportId(TransportViewId id) {
  68   return ViewId(HiWord(id), LoWord(id));
  69 }
  70
  71 inline TransportViewId ViewIdToTransportId(const ViewId& id) {
  72   return (id.connection_id << 16) | id.view_id;
  73 }
  74
  75 }  // namespace view_manager
  76 }  // namespace services
  77 }  // namespace mojo
  78
  79 #endif  // MOJO_SERVICES_VIEW_MANAGER_IDS_H_