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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 MOJO_SERVICES_VIEW_MANAGER_IDS_H_
#define MOJO_SERVICES_VIEW_MANAGER_IDS_H_
#include "mojo/services/public/cpp/view_manager/types.h"
#include "mojo/services/public/cpp/view_manager/util.h"
#include "mojo/services/view_manager/view_manager_export.h"
namespace mojo {
namespace service {
// Connection id is used to indicate no connection. That is, no
// ViewManagerServiceImpl ever gets this id.
const ConnectionSpecificId kInvalidConnectionId = 0;
// TODO(sky): remove this, temporary while window manager API is in existing
// api.
const ConnectionSpecificId kWindowManagerConnection = 1;
// Adds a bit of type safety to node ids.
struct MOJO_VIEW_MANAGER_EXPORT NodeId {
NodeId(ConnectionSpecificId connection_id, ConnectionSpecificId node_id)
: connection_id(connection_id),
node_id(node_id) {}
NodeId() : connection_id(0), node_id(0) {}
bool operator==(const NodeId& other) const {
return other.connection_id == connection_id &&
other.node_id == node_id;
}
bool operator!=(const NodeId& other) const {
return !(*this == other);
}
ConnectionSpecificId connection_id;
ConnectionSpecificId node_id;
};
// Adds a bit of type safety to view ids.
struct MOJO_VIEW_MANAGER_EXPORT ViewId {
ViewId(ConnectionSpecificId connection_id, ConnectionSpecificId view_id)
: connection_id(connection_id),
view_id(view_id) {}
ViewId() : connection_id(0), view_id(0) {}
bool operator==(const ViewId& other) const {
return other.connection_id == connection_id &&
other.view_id == view_id;
}
bool operator!=(const ViewId& other) const {
return !(*this == other);
}
ConnectionSpecificId connection_id;
ConnectionSpecificId view_id;
};
// Functions for converting to/from structs and transport values.
inline NodeId NodeIdFromTransportId(Id id) {
return NodeId(HiWord(id), LoWord(id));
}
inline Id NodeIdToTransportId(const NodeId& id) {
return (id.connection_id << 16) | id.node_id;
}
inline ViewId ViewIdFromTransportId(Id id) {
return ViewId(HiWord(id), LoWord(id));
}
inline Id ViewIdToTransportId(const ViewId& id) {
return (id.connection_id << 16) | id.view_id;
}
inline NodeId RootNodeId() {
return NodeId(kInvalidConnectionId, 1);
}
// Returns a NodeId that is reserved to indicate no node. That is, no node will
// ever be created with this id.
inline NodeId InvalidNodeId() {
return NodeId(kInvalidConnectionId, 0);
}
} // namespace service
} // namespace mojo
#endif // MOJO_SERVICES_VIEW_MANAGER_IDS_H_
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