kicad/include/collector.h

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
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*
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* Copyright (C) 2007-2008 SoftPLC Corporation, Dick Hollenbeck <dick@softplc.com>
* Copyright (C) 2004-2021 KiCad Developers, see change_log.txt for contributors.
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*
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* 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.
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*
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* 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.
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*
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* You should have received a copy of the GNU General Public License
* along with this program; if not, you may find one here:
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* 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.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#ifndef COLLECTOR_H
#define COLLECTOR_H
#include <vector>
#include <core/kicad_algo.h>
#include <eda_item.h> // SEARCH_RESULT
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#include <eda_rect.h>
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class EDA_ITEM;
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/**
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* An abstract class that will find and hold all the objects according to
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* an inspection done by the Inspect() function which must be implemented by
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* any derived class.
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*
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* When Inspect() finds an object that it wants to collect, i.e. one that it "likes", then
* it only has to do an Append( testItem )on it to add it to its collection, but in all cases
* for the scan to continue, Inspect() must return SEARCH_CONTINUE. Later, after collection,
* the user can iterate through all the objects in the remembered collection using GetCount()
* and the [int] operator.
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*/
class COLLECTOR
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{
public:
COLLECTOR() :
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m_Threshold( 0 ),
m_MenuCancelled( false ),
m_scanTypes( nullptr ),
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// Inspect() is virtual so calling it from a class common inspector preserves
// polymorphism.
m_inspector( [=]( EDA_ITEM* aItem, void* aTestData )
{
return this->Inspect( aItem, aTestData );
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} )
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{
}
virtual ~COLLECTOR() {}
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virtual SEARCH_RESULT Inspect( EDA_ITEM* aItem, void* aTestData )
{
return SEARCH_RESULT::QUIT;
};
using ITER = std::vector<EDA_ITEM*>::iterator;
using CITER = std::vector<EDA_ITEM*>::const_iterator;
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ITER begin() { return m_list.begin(); }
ITER end() { return m_list.end(); }
CITER begin() const { return m_list.cbegin(); }
CITER end() const { return m_list.cend(); }
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/**
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* Return the number of objects in the list.
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*/
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int GetCount() const
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{
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return (int) m_list.size();
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}
/**
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* Clear the list.
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*/
void Empty()
{
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m_list.clear();
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}
/**
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* Add an item to the end of the list.
*
* @param item An EDA_ITEM* to add.
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*/
void Append( EDA_ITEM* item )
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{
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m_list.push_back( item );
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}
/**
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* Remove the item at \a aIndex (first position is 0).
*
* @param aIndex The index into the list.
*/
void Remove( int aIndex )
{
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m_list.erase( m_list.begin() + aIndex );
}
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/**
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* Remove the item aItem (if exists in the collector).
*
* @param aItem the item to be removed.
*/
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void Remove( const EDA_ITEM* aItem )
{
alg::delete_if( m_list, [&aItem]( const EDA_ITEM* aCandidate )
{
return aCandidate == aItem;
} );
}
/**
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* Test if the collector has heuristic backup items.
*
* @return true if Combine() can run to bring secondary items into the list.
*/
bool HasAdditionalItems()
{
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return !m_backupList.empty();
}
/**
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* Re-combine the backup list into the main list of the collector.
*/
void Combine()
{
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std::copy( m_backupList.begin(), m_backupList.end(), std::back_inserter( m_list ) );
m_backupList.clear();
}
/**
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* Move the item at \a aIndex (first position is 0) to the backup list.
*
* @param aIndex The index into the list.
*/
void Transfer( int aIndex )
{
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m_backupList.push_back( m_list[aIndex] );
m_list.erase( m_list.begin() + aIndex );
}
/**
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* Move \a aItem (if exists in the collector) to the backup list.
*
* @param aItem the item to be moved.
*/
void Transfer( EDA_ITEM* aItem )
{
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for( size_t i = 0; i < m_list.size(); i++ )
{
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if( m_list[i] == aItem )
{
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m_list.erase( m_list.begin() + i );
m_backupList.push_back( aItem );
return;
}
}
}
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/**
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* Used for read only access and returns the object at \a aIndex.
*
* @param aIndex The index into the list.
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* @return the object at \a aIndex something derived from it or NULL.
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*/
virtual EDA_ITEM* operator[]( int aIndex ) const
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{
if( (unsigned)aIndex < (unsigned)GetCount() ) // (unsigned) excludes aIndex<0 also
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return m_list[ aIndex ];
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return nullptr;
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}
/**
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* Tests if \a aItem has already been collected.
*
* @param aItem The EDA_ITEM* to be tested.
* @return True if \a aItem is already collected.
*/
bool HasItem( const EDA_ITEM* aItem ) const
{
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for( size_t i = 0; i < m_list.size(); i++ )
{
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if( m_list[i] == aItem )
return true;
}
return false;
}
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/**
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* Record the list of #KICAD_T types to consider for collection by the Inspect() function.
*
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* @param scanTypes An array of KICAD_T, terminated by EOT. No copy is
* is made of this array (so cannot come from caller's stack).
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*/
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void SetScanTypes( const KICAD_T* scanTypes )
{
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m_scanTypes = scanTypes;
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}
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void SetRefPos( const wxPoint& aRefPos ) { m_refPos = aRefPos; }
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const EDA_RECT& GetBoundingBox() const { return m_refBox; }
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/**
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* Count the number of items matching \a aType.
*
* @param aType type we are interested in.
* @return number of occurrences.
*/
int CountType( KICAD_T aType )
{
int cnt = 0;
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for( size_t i = 0; i < m_list.size(); i++ )
{
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if( m_list[i]->Type() == aType )
cnt++;
}
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return cnt;
}
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int m_Threshold; // Hit-test threshold in internal units.
wxString m_MenuTitle; // The title of selection disambiguation menu (if needed)
bool m_MenuCancelled; // Indicates selection disambiguation menu was canceled
protected:
std::vector<EDA_ITEM*> m_list; // Primary list of most likely items
std::vector<EDA_ITEM*> m_backupList; // Secondary list with items removed by heuristics
const KICAD_T* m_scanTypes;
INSPECTOR_FUNC m_inspector;
wxPoint m_refPos; // Reference position used to generate the collection.
EDA_RECT m_refBox; // Selection rectangle used to generate the collection.};
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};
#endif // COLLECTOR_H