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/****************************************************************************
**
** Copyright (C) 1993-2009 NVIDIA Corporation.
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt 3D Studio.
**
** $QT_BEGIN_LICENSE:GPL-EXCEPT$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#pragma once
#ifndef HANDLESYSTEMIMPLH
#define HANDLESYSTEMIMPLH
#include <unordered_map>
namespace qt3dsdm {
class CHandleObject
{
public:
// Type of CHandleObject
// Each subclass needs to specify what type it is
// This is used to avoid dynamic_cast (RTTI) which is expensive
enum EHandleObjectType {
EHandleObjectTypeUnknown = 0,
EHandleObjectTypeCDataModelInstance,
EHandleObjectTypeCDataModelPropertyDefinitionObject,
EHandleObjectTypeSAnimationTrack,
EHandleObjectTypeSKeyframe,
EHandleObjectTypeSSlide,
EHandleObjectTypeSSlideGraph,
EHandleObjectTypeAction,
EHandleObjectTypeActionHandlerArgument,
EHandleObjectTypeCustomProperty,
EHandleObjectTypeEvent,
EHandleObjectTypeCustomHandler,
EHandleObjectTypeHandlerParam,
EHandleObjectTypeEnd,
};
CHandleObject(int inHandle = 0)
: m_Handle(inHandle)
{
}
virtual ~CHandleObject() {}
virtual EHandleObjectType GetType() = 0;
int m_Handle;
private: //noncopyable
CHandleObject(const CHandleObject&) = delete;
CHandleObject& operator=(const CHandleObject&) = delete;
};
typedef std::shared_ptr<CHandleObject> THandleObjectPtr;
// Note that maps don't need to copy their objects.
typedef std::unordered_map<int, THandleObjectPtr> THandleObjectMap;
typedef std::pair<int, THandleObjectPtr> THandleObjectPair;
class IHandleBase
{
public:
/**
* Check whether a given handle exists
*/
virtual bool HandleValid(int inHandle) const = 0;
};
struct CHandleBase : public IHandleBase
{
THandleObjectMap m_Objects;
int m_NextId;
CHandleBase()
: m_NextId(1)
{
}
CHandleBase(const CHandleBase &inOther)
: m_Objects(inOther.m_Objects)
, m_NextId(inOther.m_NextId)
{
}
CHandleBase &operator=(const CHandleBase &inOther)
{
m_Objects = inOther.m_Objects;
m_NextId = inOther.m_NextId;
return *this;
}
// IHandleBase
bool HandleValid(int inHandle) const override
{
return m_Objects.find(inHandle) != m_Objects.end();
}
template <typename T>
static inline bool HandleObjectValid(int inHandle, const THandleObjectMap &inMap)
{
THandleObjectMap::const_iterator theIter = inMap.find(inHandle);
if (theIter != inMap.end()) {
if (theIter->second->GetType() == T::s_Type)
return true;
}
return false;
}
template <typename T>
static inline const T *GetHandleObject(int inHandle, const THandleObjectMap &inMap)
{
THandleObjectMap::const_iterator theIter = inMap.find(inHandle);
if (theIter != inMap.end()) {
if (theIter->second->GetType() == T::s_Type)
return static_cast<const T *>(theIter->second.get());
}
return NULL;
}
template <typename ObjectType, typename HandleType>
static inline void MaybeAddObject(const std::pair<int, THandleObjectPtr> &inItem,
std::vector<HandleType> &outHandles)
{
if (inItem.second->GetType() == ObjectType::s_Type)
outHandles.push_back(HandleType(inItem.first));
}
static void EraseHandle(int inHandle, THandleObjectMap &inObjects)
{
THandleObjectMap::iterator theFind = inObjects.find(inHandle);
if (theFind != inObjects.end())
inObjects.erase(theFind);
}
// Return the next unused id. There are no guarantees whether positive or negative; what this
// will
// guarantee is that it isn't currently used in the object map and it is non-zero.
int GetNextId()
{
do {
++m_NextId;
} while (m_Objects.find(m_NextId) != m_Objects.end());
return m_NextId;
}
};
}
#endif
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