kicad/pcbnew/collectors.h

/*
 * This program source code file is part of KICAD, a free EDA CAD application.
 *
 * Copyright (C) 2007 Dick Hollenbeck, dick@softplc.com
 * Copyright (C) 2004-2007 Kicad Developers, see change_log.txt for contributors.
 * 
 * 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 COLLECTORS_H
#define COLLECTORS_H


/*  This module contains a number of COLLECTOR implementations which are used
    to augment the functionality of class WinEDA_PcbFrame.
*/


#include "class_collector.h"
#include "pcbstruct.h"              // LAYER_COUNT, layer defs


/**
 * Class COLLECTORS_GUIDE
 * is an abstract base class whose derivatives may be passed to a GENERALCOLLECTOR, 
 * telling GENERALCOLLECTOR what should be collected (aside from HitTest()ing 
 * and KICAD_T scanTypes[], information which are provided to the GENERALCOLLECTOR 
 * through attributes or arguments separately). 
 * <p>
 * A justification for this class is to keep the structural storage details of
 * the program's "global preferences" or "configuration options" out of 
 * GENERAL_COLLECTOR::Inspect().  This class carries all the necessary details
 * in with it to the Inspect() call. The constructors or other functions of
 * this class's derivatives are then the only place where knowledge of the
 * specific structure of the global preference storage is needed.  Thus, 
 * GENERAL_COLLECTOR::Inspect() can be kept as simple as possible, and insulated 
 * from changes in global preference storage (and even then it is 
 * not simple enough).
 * <p>
 * This class introduces the notion of layer locking.
 */
class COLLECTORS_GUIDE 
{
    
public:
    virtual     ~COLLECTORS_GUIDE() {}

    /**
     * Function IsLayerLocked
     * @return bool - true if the given layer is locked, else false.
     */
    virtual     bool IsLayerLocked( int layer ) const = 0;
    
    /**
     * Function IsLayerVisible
     * @return bool - true if the given layer is visible, else false.
     */
    virtual     bool IsLayerVisible( int layer ) const = 0;
    
    /**
     * Function IgnoreLockedLayers
     * @return bool - true if should ignore locked layers, else false.
     */
    virtual     bool IgnoreLockedLayers() const = 0;
    
    /**
     * Function IgnoredNonVisibleLayers
     * @return bool - true if should ignore non-visible layers, else false.
     */
    virtual     bool IgnoreNonVisibleLayers() const = 0;
    
    /**
     * Function GetPreferredLayer
     * @return int - the preferred layer for HitTest()ing.
     */
    virtual     int GetPreferredLayer() const = 0;

    /**
     * Function IgnorePreferredLayer
     * provides wildcard behavior regarding the preferred layer.
     * @return bool - true if should ignore preferred layer, else false.
     */
    virtual     bool IgnorePreferredLayer() const = 0;

    /**
     * Function IgnoreLockedItems
     * @return bool - true if should ignore locked items, else false.
     */
    virtual     bool IgnoreLockedItems() const = 0;


    /**
     * Function IncludeSecondary
     * determines if the secondary criteria, or 2nd choice items should be
     * included.
     * @return bool - true if should include, else false.
     */
    virtual     bool IncludeSecondary() const = 0;
    
    
    /**
     * Function UseHitTesting
     * @return bool - true if Inspect() should use BOARD_ITEM::HitTest()
     *             or false if Inspect() should use BOARD_ITEM::BoundsTest().
    virtual     bool UseHitTesting() const = 0;
     */
    
};



/**
 * Class GENERAL_COLLECTOR
 * is intended for use when the right click button is pressed, or when the 
 * plain "arrow" tool is in effect.  This class can be used by window classes
 * such as WinEDA_PcbFrame.
 *
 * Philosophy: this class knows nothing of the context in which a BOARD is used
 * and that means it knows nothing about which layers are visible or current, 
 * but can handle those concerns by the SetPreferredLayer() function and the
 * SetLayerMask() fuction.
 */
class GENERAL_COLLECTOR : public COLLECTOR
{
protected:    
    /**
     * A place to hold collected objects which don't match precisely the search 
     * criteria, but would be acceptable if nothing else is found. 
     * "2nd" choice, which will be appended to the end of COLLECTOR's prime 
     * "list" at the end of the search.
     */
    std::vector<BOARD_ITEM*>    m_List2nd;
    
    
    /**
     * Determines which items are to be collected by Inspect()
     */
    const COLLECTORS_GUIDE*    m_Guide;

    
public:

    /// A scan list for all editable board items, like PcbGeneralLocateAndDisplay()
    static const KICAD_T AllBoardItems[];


    /**
     * Constructor GENERALCOLLECTOR
     */ 
    GENERAL_COLLECTOR()
    {
        SetScanTypes( AllBoardItems );
    }

    void Empty2nd()
    {
        m_List2nd.clear();
    }

    void Append2nd( BOARD_ITEM* item )
    {
        m_List2nd.push_back( item );
    }


    /**
     * Function SetGuide
     * records which COLLECTORS_GUIDE to used.
     * @param aGuide Which guide to use in the collection.
     */
    void SetGuide( const COLLECTORS_GUIDE* aGuide ) { m_Guide = aGuide; }
    
    
    /**
     * Function SetLayerMask
     * takes a bit-mapped layer mask and records it.  During the scan/search,
     * this is used as a secondary search criterion.  That is, if there is no direct 
     * layer match with COLLECTOR::m_PreferredLayer (the primary criterion), 
     * then an object on any layer given in this bit-map is recorded as a 
     * second choice object if it also HitTest()s true.
     *
     * @param aLayerMask A layer mask which has bits in it indicating which
     *  layers are acceptable.  Caller must pay attention to which layers are
     *  visible, selected, etc.  All those concerns are handled outside this
     *  class, as stated in the class Philosophy above.
    void SetLayerMask( int aLayerMask )
    {
        m_LayerMask = aLayerMask;
    }
     */

    
    /**
     * Function operator[int]
     * overloads COLLECTOR::operator[](int) to return a BOARD_ITEM* instead of
     * an EDA_BaseStruct* type.
     * @param ndx The index into the list.
     * @return BOARD_ITEM* - or something derived from it, or NULL.
     */
    BOARD_ITEM* operator[]( int ndx ) const
    {
        if( (unsigned)ndx < (unsigned)GetCount() )
            return (BOARD_ITEM*) m_List[ ndx ];
        return NULL;
    }

    
    /**
     * Function Inspect
     * is the examining function within the INSPECTOR which is passed to the 
     * Iterate function.
     *
     * @param testItem An EDA_BaseStruct to examine.
     * @param testData is not used in this class.
     * @return SEARCH_RESULT - SEARCH_QUIT if the Iterator is to stop the scan,
     *   else SCAN_CONTINUE;
     */ 
    SEARCH_RESULT Inspect( EDA_BaseStruct* testItem, const void* testData );
    
    
    /**
     * Function Collect
     * scans a BOARD using this class's Inspector method, which does the collection.
     * @param board A BOARD to scan.
     * @param refPos A wxPoint to use in hit-testing.
     * @param aPreferredLayer The layer meeting the primary search criterion.
     * @param aLayerMask The layers, in bit-mapped form, meeting the secondary search criterion.
    void Collect( BOARD* board, const wxPoint& refPos, int aPreferredLayer, int aLayerMask );
     */

    
    /**
     * Function Collect
     * scans a BOARD using this class's Inspector method, which does the collection.
     * @param aBoard A BOARD to scan.
     * @param aRefPos A wxPoint to use in hit-testing.
     * @param aGuide The COLLECTORS_GUIDE to use in collecting items.
     */
    void Collect( BOARD* aBoard, const wxPoint& aRefPos, const COLLECTORS_GUIDE* aGuide ); 
};


/**
 * Class GENERAL_COLLECTORS_GUIDE
 * is a general implementation of a COLLECTORS_GUIDE.  One of its constructors is
 * entitled to grab information from the program's global preferences.
 */ 
class GENERAL_COLLECTORS_GUIDE : public COLLECTORS_GUIDE
{
private:
    // the storage architecture here is not important, since this is only 
    // a carrier object and its functions are what is used, and data only indirectly.
    
    int     m_PreferredLayer;
    bool    m_IgnorePreferredLayer;
    
    int     m_LayerLocked;                  ///< bit-mapped layer locked bits
    bool    m_IgnoreLockedLayers;

    int     m_LayerVisible;                 ///< bit-mapped layer visible bits    
    bool    m_IgnoreNonVisibleLayers;
    
    bool    m_IgnoreLockedItems;    
    bool    m_IncludeSecondary;
    
public:

    /**
     * Constructor GENERAL_COLLECTORS_GUIDE
     * grabs stuff from global preferences and uses reasonable defaults.
     * Add more constructors as needed.
     * @param settings The EDA_BoardDesignSettings to reference.
     */
    GENERAL_COLLECTORS_GUIDE( const EDA_BoardDesignSettings* settings )
    {
        m_PreferredLayer            = LAYER_CMP_N;
        m_IgnorePreferredLayer      = false;
        m_LayerLocked               = 0;
        m_LayerVisible              = settings->GetVisibleLayers();    
        m_IgnoreLockedLayers        = true;
        m_IgnoreNonVisibleLayers    = true;
        m_IgnoreLockedItems         = true;
        
#if defined(USE_MATCH_LAYER)
        m_IncludeSecondary          = false;
#else        
        m_IncludeSecondary          = true;
#endif        
    }
    
    /**
     * Function IsLayerLocked
     * @return bool - true if the given layer is locked, else false.
     */
    bool IsLayerLocked( int aLayer ) const  {  return (1<<aLayer) & m_LayerLocked; }
    void SetLayerLocked( int aLayer, bool isLocked ) 
    {
        if( isLocked )
            m_LayerLocked |= 1 << aLayer;
        else
            m_LayerLocked &= ~(1 << aLayer);
    }

    
    /**
     * Function IsLayerVisible
     * @return bool - true if the given layer is visible, else false.
     */
    bool IsLayerVisible( int aLayer ) const { return (1<<aLayer) & m_LayerVisible; }
    void SetLayerVisible( int aLayer, bool isVisible )
    {
        if( isVisible )
            m_LayerVisible |= 1 << aLayer;
        else
            m_LayerVisible &= ~(1 << aLayer);
    }
    void SetLayerVisibleBits( int aLayerBits ) { m_LayerVisible = aLayerBits; }

    
    /**
     * Function IgnoreLockedLayers
     * @return bool - true if should ignore locked layers, else false.
     */
    bool IgnoreLockedLayers() const { return m_IgnoreLockedLayers; }
    void SetIgnoreLockedLayers( bool ignore ) { m_IgnoreLockedLayers = ignore; }
     
    
    /**
     * Function IgnoredNonVisibleLayers
     * @return bool - true if should ignore non-visible layers, else false.
     */
    bool IgnoreNonVisibleLayers() const { return m_IgnoreNonVisibleLayers; }
    void SetIgnoreNonVisibleLayers( bool ignore ) { m_IgnoreLockedLayers = ignore; }

    
    /**
     * Function GetPreferredLayer
     * @return int - the preferred layer for HitTest()ing.
     */
    int GetPreferredLayer() const { return m_PreferredLayer; }
    void SetPreferredLayer( int aLayer )  { m_PreferredLayer = aLayer; }

    
    /**
     * Function IgnorePreferredLayer
     * provides wildcard behavior regarding the preferred layer.
     * @return bool - true if should ignore preferred layer, else false.
     */
    bool IgnorePreferredLayer() const { return  m_IgnorePreferredLayer; }
    void SetIgnorePreferredLayer( bool ignore )  { m_IgnorePreferredLayer = ignore; }
    

    /**
     * Function IgnoreLockedItems
     * @return bool - true if should ignore locked items, else false.
     */
    bool IgnoreLockedItems() const  { return m_IgnoreLockedItems; }
    void SetIgnoreLockedItems( bool ignore ) { m_IgnoreLockedItems = ignore; }


    /**
     * Function IncludeSecondary
     * determines if the secondary criteria, or 2nd choice items should be
     * included.
     * @return bool - true if should include, else false.
     */
    bool IncludeSecondary() const  { return m_IncludeSecondary; }
    void SetIncludeSecondary( bool include ) { m_IncludeSecondary = include; } 
    
};

#endif // COLLECTORS_H