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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 SERVICES_VIEW_MANAGER_IDS_H_
#define SERVICES_VIEW_MANAGER_IDS_H_
#include "third_party/mojo_services/src/view_manager/public/cpp/types.h"
#include "third_party/mojo_services/src/view_manager/public/cpp/util.h"
namespace view_manager {
// Connection id is used to indicate no connection. That is, no
// ViewManagerServiceImpl ever gets this id.
const mojo::ConnectionSpecificId kInvalidConnectionId = 0;
// Adds a bit of type safety to view ids.
struct ViewId {
ViewId(mojo::ConnectionSpecificId connection_id,
mojo::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);
}
mojo::ConnectionSpecificId connection_id;
mojo::ConnectionSpecificId view_id;
};
inline ViewId ViewIdFromTransportId(mojo::Id id) {
return ViewId(mojo::HiWord(id), mojo::LoWord(id));
}
inline mojo::Id ViewIdToTransportId(const ViewId& id) {
return (id.connection_id << 16) | id.view_id;
}
inline ViewId RootViewId() {
return ViewId(kInvalidConnectionId, 1);
}
// Returns a ViewId that is reserved to indicate no view. That is, no view will
// ever be created with this id.
inline ViewId InvalidViewId() {
return ViewId(kInvalidConnectionId, 0);
}
// All cloned views use this id.
inline ViewId ClonedViewId() {
return ViewId(kInvalidConnectionId, 2);
}
} // namespace view_manager
#endif // SERVICES_VIEW_MANAGER_IDS_H_
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