kicad/include/property_mgr.h

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2020 CERN
* @author Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
* @author Maciej Suminski <maciej.suminski@cern.ch>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 3
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef PROPERTY_MGR_H
#define PROPERTY_MGR_H
#include <wx/string.h>
#include <map>
#include <unordered_map>
#include <set>
#include <vector>
#include <memory>
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#include <eda_units.h>
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#include <common.h> // Needed for stl hash extensions
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class PROPERTY_BASE;
class TYPE_CAST_BASE;
///> Unique type identifier
using TYPE_ID = size_t;
using PROPERTY_LIST = std::vector<PROPERTY_BASE*>;
using PROPERTY_SET = std::set<std::pair<size_t, wxString>>;
/**
* Provides class metadata. Each class handled by PROPERTY_MANAGER
* needs to be described using AddProperty(), AddTypeCast() and InheritsAfter() methods.
*
* Enum types use a dedicated property type (PROPERTY_ENUM), define its possible values
* with ENUM_MAP class, then describe the type using macros:
* - DECLARE_ENUM_TO_WXANY (in header files)
* - IMPLEMENT_ENUM_TO_WXANY (in source files)
* - ENUM_TO_WXANY (*most often used*; combines DECLARE and IMPLEMENT macros,
* if there is no need to share the description using header files)
*
* Once all classes are described, the property list must be build using
* Rebuild() method.
*/
class PROPERTY_MANAGER
{
public:
static PROPERTY_MANAGER& Instance()
{
static PROPERTY_MANAGER pm;
return pm;
}
/**
* Associates a name with a type.
*
* Builds a map to provide faster type look-up.
*
* @param aType is the type identifier (obtained using TYPE_HASH()).
* @param aName is the type name.
*/
void RegisterType( TYPE_ID aType, const wxString& aName );
/**
* Returns name of a type.
*
* @param aType is the type identifier (obtained using TYPE_HASH()).
* @return Name of the type or empty string, if not available.
*/
const wxString& ResolveType( TYPE_ID aType ) const;
/**
* Returns a property for a specific type.
*
* @param aType is the type identifier (obtained using TYPE_HASH()).
* @param aProperty is the property name used during class registration.
* @return Requested property or null pointer if requested property does not exist.
*/
PROPERTY_BASE* GetProperty( TYPE_ID aType, const wxString& aProperty ) const;
/**
* Returns all properties for a specific type.
*
* @param aType is the type identifier (obtained using TYPE_HASH()).
* @return Vector storing all properties of the requested type.
*/
const PROPERTY_LIST& GetProperties( TYPE_ID aType ) const;
/**
* Casts a type to another type. Used for correct type-casting of types with
* multi-inheritance. Requires registration of an appropriate converter (AddTypeCast).
*
* @param aSource is a pointer to the casted object.
* @param aBase is aSource type identifier (obtained using TYPE_HASH()).
* @param aTarget is the desired type identifier (obtained using TYPE_HASH()).
* @return Properly casted pointer of aTarget type. *
*
* @see AddTypeCast
*/
const void* TypeCast( const void* aSource, TYPE_ID aBase, TYPE_ID aTarget ) const;
void* TypeCast( void* aSource, TYPE_ID aBase, TYPE_ID aTarget ) const
{
return const_cast<void*>( TypeCast( (const void*) aSource, aBase, aTarget ) );
}
/**
* Registers a property.
*
* @param aProperty is the property to register.
*/
void AddProperty( PROPERTY_BASE* aProperty );
/**
* Replaces an existing property for a specific type.
*
* It is used to modify a property that has been inherited from a base class.
* This method is used instead of AddProperty().
*
* @param aBase is the base class type the delivers the original property.
* @param aName is the name of the replaced property.
* @param aNew is the property replacing the inherited one.
*/
void ReplaceProperty( size_t aBase, const wxString& aName, PROPERTY_BASE* aNew );
/**
* Registers a type converter. Required prior TypeCast() usage.
*
* @param aCast is the type converter to register.
*/
void AddTypeCast( TYPE_CAST_BASE* aCast );
/**
* Declares an inheritance relationship between types.
*
* @param aBase is the base type identifier (obtained using TYPE_HASH()).
* @param aDerived is the derived type identifier (obtained using TYPE_HASH()).
*/
void InheritsAfter( TYPE_ID aDerived, TYPE_ID aBase );
/**
* Returns true if aDerived is inherited from aBase.
*/
bool IsOfType( TYPE_ID aDerived, TYPE_ID aBase ) const;
EDA_UNITS GetUnits() const
{
return m_units;
}
void SetUnits( EDA_UNITS aUnits )
{
m_units = aUnits;
}
/**
* Rebuilds the list of all registered properties. Needs to be called
* once before GetProperty()/GetProperties() are used.
*/
void Rebuild();
struct CLASS_INFO
{
wxString name;
TYPE_ID type;
std::vector<PROPERTY_BASE*> properties;
};
typedef std::vector<CLASS_INFO> CLASSES_INFO;
CLASSES_INFO GetAllClasses();
std::vector<TYPE_ID> GetMatchingClasses( PROPERTY_BASE* aProperty );
private:
PROPERTY_MANAGER()
: m_dirty( false ), m_units( EDA_UNITS::MILLIMETRES )
{
}
///> Structure holding type meta-data
struct CLASS_DESC
{
CLASS_DESC( TYPE_ID aId )
: m_id( aId )
{
}
///> Unique type identifier (obtained using TYPE_HASH)
const TYPE_ID m_id;
///> Types after which this type inherits
std::vector<std::reference_wrapper<CLASS_DESC>> m_bases;
///> Properties unique to this type (i.e. not inherited)
std::map<wxString, std::unique_ptr<PROPERTY_BASE>> m_ownProperties;
///> Type converters available for this type
std::map<TYPE_ID, std::unique_ptr<TYPE_CAST_BASE>> m_typeCasts;
///> All properties (both unique to the type and inherited)
std::vector<PROPERTY_BASE*> m_allProperties;
///> Replaced properties (TYPE_ID / name)
PROPERTY_SET m_replaced;
///> Recreates the list of properties
void rebuild();
///> Traverses the class inheritance hierarchy bottom-to-top, gathering
///> all properties available to a type
void collectPropsRecur( PROPERTY_LIST& aResult, PROPERTY_SET& aReplaced ) const;
};
///> Returns metadata for a specific type
CLASS_DESC& getClass( TYPE_ID aTypeId );
std::unordered_map<TYPE_ID, wxString> m_classNames;
///> Map of all available types
std::unordered_map<TYPE_ID, CLASS_DESC> m_classes;
/// Flag indicating that the list of properties needs to be rebuild (RebuildProperties())
bool m_dirty;
EDA_UNITS m_units;
};
///> Helper macro to map type hashes to names
#define REGISTER_TYPE(x) PROPERTY_MANAGER::Instance().RegisterType(TYPE_HASH(x), TYPE_NAME(x))
#endif /* PROPERTY_MGR_H */