kicad/pcbnew/tools/selection_conditions.h

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2014 CERN
* @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 2
* 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, you may find one here:
* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
* or you may search the http://www.gnu.org website for the version 2 license,
* or you may write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#ifndef SELECTION_CONDITIONS_H_
#define SELECTION_CONDITIONS_H_
#include <boost/function.hpp>
#include <core/typeinfo.h>
struct SELECTION;
///> Functor type that checks a specific condition for selected items.
typedef boost::function<bool (const SELECTION&)> SELECTION_CONDITION;
SELECTION_CONDITION operator||( const SELECTION_CONDITION& aConditionA,
const SELECTION_CONDITION& aConditionB );
SELECTION_CONDITION operator&&( const SELECTION_CONDITION& aConditionA,
const SELECTION_CONDITION& aConditionB );
/**
* Class that groups generic conditions for selected items.
*/
class SELECTION_CONDITIONS
{
public:
/**
* Function ShowAlways
* The default condition function (always returns true).
* @param aSelection is the selection to be tested.
* @return Always true;
*/
static bool ShowAlways( const SELECTION& aSelection )
{
return true;
}
/**
* Function NotEmpty
* Tests if there are any items selected.
* @param aSelection is the selection to be tested.
* @return True if there is at least one item selected.
*/
static bool NotEmpty( const SELECTION& aSelection );
/**
* Function HasType
* Creates functor that tests if among the selected items there is at least one of a given type.
* @param aType is the type that is searched.
* @return Functor testing for presence of items of a given type.
*/
static SELECTION_CONDITION HasType( KICAD_T aType );
/**
* Function OnlyType
* Creates functor that tests if the selected items are *only* of given type.
* @param aType is the type that is searched.
* @return Functor testing if selected items are exclusively of one type..
*/
static SELECTION_CONDITION OnlyType( KICAD_T aType );
/**
* Function Count
* Creates functor that tests if the number of selected items is equal to the value given as
* parameter.
* @param aNumber is the number of expected items.
* @return Functor testing if the number of selected items is equal aNumber.
*/
static SELECTION_CONDITION Count( int aNumber );
/**
* Function MoreThan
* Creates functor that tests if the number of selected items is greater than the value given
* as parameter.
* @param aNumber is the number used for comparison.
* @return Functor testing if the number of selected items is greater than aNumber.
*/
static SELECTION_CONDITION MoreThan( int aNumber );
/**
* Function LessThan
* Creates functor that tests if the number of selected items is smaller than the value given
* as parameter.
* @param aNumber is the number used for comparison.
* @return Functor testing if the number of selected items is smaller than aNumber.
*/
static SELECTION_CONDITION LessThan( int aNumber );
private:
///> Helper function used by HasType()
static bool hasTypeFunc( const SELECTION& aSelection, KICAD_T aType );
///> Helper function used by OnlyType()
static bool onlyTypeFunc( const SELECTION& aSelection, KICAD_T aType );
///> Helper function used by Count()
static bool countFunc( const SELECTION& aSelection, int aNumber );
///> Helper function used by MoreThan()
static bool moreThanFunc( const SELECTION& aSelection, int aNumber );
///> Helper function used by LessThan()
static bool lessThanFunc( const SELECTION& aSelection, int aNumber );
///> Helper function used by operator||
static bool orFunc( const SELECTION_CONDITION& aConditionA,
const SELECTION_CONDITION& aConditionB, const SELECTION& aSelection )
{
return aConditionA( aSelection ) || aConditionB( aSelection );
}
///> Helper function used by operator&&
static bool andFunc( const SELECTION_CONDITION& aConditionA,
const SELECTION_CONDITION& aConditionB, const SELECTION& aSelection )
{
return aConditionA( aSelection ) && aConditionB( aSelection );
}
friend SELECTION_CONDITION operator||( const SELECTION_CONDITION& aConditionA,
const SELECTION_CONDITION& aConditionB );
friend SELECTION_CONDITION operator&&( const SELECTION_CONDITION& aConditionA,
const SELECTION_CONDITION& aConditionB );
};
#endif /* SELECTION_CONDITIONS_H_ */