edit_tool.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2013-2023 CERN
 * Copyright (C) 2017-2024 KiCad Developers, see AUTHORS.txt for contributors.
 * @author Maciej Suminski <[email protected]>
 * @author Tomasz Wlostowski <[email protected]>
 *
 * 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
 */
 
#include <macros.h>
#include <advanced_config.h>
#include <limits>
#include <kiplatform/ui.h>
#include <gal/graphics_abstraction_layer.h>
#include <board.h>
#include <board_design_settings.h>
#include <footprint.h>
#include <pcb_shape.h>
#include <pcb_group.h>
#include <pcb_target.h>
#include <pcb_textbox.h>
#include <pcb_table.h>
#include <pcb_generator.h>
#include <pcb_edit_frame.h>
#include <drawing_sheet/ds_proxy_view_item.h>
#include <kiway.h>
#include <array_creator.h>
#include <status_popup.h>
#include <tool/selection_conditions.h>
#include <tool/tool_manager.h>
#include <tools/pcb_actions.h>
#include <tools/pcb_selection_tool.h>
#include <tools/edit_tool.h>
#include <tools/item_modification_routine.h>
#include <tools/pcb_picker_tool.h>
#include <tools/pcb_point_editor.h>
#include <tools/tool_event_utils.h>
#include <tools/pcb_grid_helper.h>
#include <tools/pad_tool.h>
#include <view/view_controls.h>
#include <connectivity/connectivity_algo.h>
#include <core/kicad_algo.h>
#include <fix_board_shape.h>
#include <bitmaps.h>
#include <functional>
using namespace std::placeholders;
#include "kicad_clipboard.h"
#include <wx/hyperlink.h>
#include <router/router_tool.h>
#include <dialogs/dialog_move_exact.h>
#include <dialogs/dialog_track_via_properties.h>
#include <dialogs/dialog_tablecell_properties.h>
#include <dialogs/dialog_table_properties.h>
#include <dialogs/dialog_unit_entry.h>
#include <pcb_reference_image.h>
 
const unsigned int EDIT_TOOL::COORDS_PADDING = pcbIUScale.mmToIU( 20 );
 
static const std::vector<KICAD_T> padTypes = { PCB_PAD_T };
 
static const std::vector<KICAD_T> footprintTypes = { PCB_FOOTPRINT_T };
 
static const std::vector<KICAD_T> groupTypes = { PCB_GROUP_T };
 
static const std::vector<KICAD_T> trackTypes = { PCB_TRACE_T,
 PCB_ARC_T,
 PCB_VIA_T };
 
static const std::vector<KICAD_T> baseConnectedTypes = { PCB_PAD_T,
 PCB_VIA_T,
 PCB_TRACE_T,
 PCB_ARC_T };
 
static const std::vector<KICAD_T> connectedTypes = { PCB_TRACE_T,
 PCB_ARC_T,
 PCB_VIA_T,
 PCB_PAD_T,
 PCB_ZONE_T };
 
static const std::vector<KICAD_T> unroutableTypes = { PCB_TRACE_T,
 PCB_ARC_T,
 PCB_VIA_T,
 PCB_PAD_T,
 PCB_FOOTPRINT_T };
 
 
EDIT_TOOL::EDIT_TOOL() :
 PCB_TOOL_BASE( "pcbnew.InteractiveEdit" ),
 m_selectionTool( nullptr ),
 m_dragging( false )
{
}
 
 
void EDIT_TOOL::Reset( RESET_REASON aReason )
{
 m_dragging = false;
 
 m_statusPopup = std::make_unique<STATUS_TEXT_POPUP>( getEditFrame<PCB_BASE_EDIT_FRAME>() );
}
 
 
static std::shared_ptr<CONDITIONAL_MENU> makePositioningToolsMenu( TOOL_INTERACTIVE* aTool )
{
 auto menu = std::make_shared<CONDITIONAL_MENU>( aTool );
 
 menu->SetIcon( BITMAPS::special_tools );
 menu->SetTitle( _( "Positioning Tools" ) );
 
 auto notMovingCondition = []( const SELECTION& aSelection )
 {
 return aSelection.Empty() || !aSelection.Front()->IsMoving();
 };
 
 // clang-format off
 menu->AddItem( PCB_ACTIONS::moveExact, SELECTION_CONDITIONS::NotEmpty && notMovingCondition );
 menu->AddItem( PCB_ACTIONS::moveWithReference, SELECTION_CONDITIONS::NotEmpty && notMovingCondition );
 menu->AddItem( PCB_ACTIONS::copyWithReference, SELECTION_CONDITIONS::NotEmpty && notMovingCondition );
 menu->AddItem( PCB_ACTIONS::positionRelative, SELECTION_CONDITIONS::NotEmpty && notMovingCondition );
 // clang-format on
 return menu;
};
 
 
static std::shared_ptr<CONDITIONAL_MENU> makeShapeModificationMenu( TOOL_INTERACTIVE* aTool )
{
 auto menu = std::make_shared<CONDITIONAL_MENU>( aTool );
 
 menu->SetTitle( _( "Shape Modification" ) );
 
 static const std::vector<KICAD_T> filletChamferTypes = { PCB_SHAPE_LOCATE_POLY_T,
 PCB_SHAPE_LOCATE_RECT_T,
 PCB_SHAPE_LOCATE_SEGMENT_T };
 
 static const std::vector<KICAD_T> healShapesTypes = { PCB_SHAPE_LOCATE_SEGMENT_T,
 PCB_SHAPE_LOCATE_ARC_T,
 PCB_SHAPE_LOCATE_BEZIER_T };
 
 static const std::vector<KICAD_T> lineExtendTypes = { PCB_SHAPE_LOCATE_SEGMENT_T };
 
 static const std::vector<KICAD_T> polygonBooleanTypes = { PCB_SHAPE_LOCATE_RECT_T,
 PCB_SHAPE_LOCATE_POLY_T };
 
 static const std::vector<KICAD_T> polygonSimplifyTypes = { PCB_SHAPE_LOCATE_POLY_T,
 PCB_ZONE_T };
 
 auto hasCornerCondition =
 [aTool]( const SELECTION& aSelection )
 {
 PCB_POINT_EDITOR *pt_tool = aTool->GetManager()->GetTool<PCB_POINT_EDITOR>();
 
 return pt_tool && pt_tool->HasCorner();
 };
 
 auto hasMidpointCondition =
 [aTool]( const SELECTION& aSelection )
 {
 PCB_POINT_EDITOR *pt_tool = aTool->GetManager()->GetTool<PCB_POINT_EDITOR>();
 
 return pt_tool && pt_tool->HasMidpoint();
 };
 
 // clang-format off
 menu->AddItem( PCB_ACTIONS::healShapes, SELECTION_CONDITIONS::HasTypes( healShapesTypes ) );
 menu->AddItem( PCB_ACTIONS::simplifyPolygons, SELECTION_CONDITIONS::HasTypes( polygonSimplifyTypes ) );
 menu->AddItem( PCB_ACTIONS::filletLines, SELECTION_CONDITIONS::OnlyTypes( filletChamferTypes ) );
 menu->AddItem( PCB_ACTIONS::chamferLines, SELECTION_CONDITIONS::OnlyTypes( filletChamferTypes ) );
 menu->AddItem( PCB_ACTIONS::extendLines, SELECTION_CONDITIONS::OnlyTypes( lineExtendTypes )
 && SELECTION_CONDITIONS::Count( 2 ) );
 menu->AddItem( PCB_ACTIONS::pointEditorMoveCorner, hasCornerCondition );
 menu->AddItem( PCB_ACTIONS::pointEditorMoveMidpoint, hasMidpointCondition );
 
 menu->AddSeparator( SELECTION_CONDITIONS::OnlyTypes( polygonBooleanTypes )
 && SELECTION_CONDITIONS::MoreThan( 1 ) );
 
 menu->AddItem( PCB_ACTIONS::mergePolygons, SELECTION_CONDITIONS::OnlyTypes( polygonBooleanTypes )
 && SELECTION_CONDITIONS::MoreThan( 1 ) );
 menu->AddItem( PCB_ACTIONS::subtractPolygons, SELECTION_CONDITIONS::OnlyTypes( polygonBooleanTypes )
 && SELECTION_CONDITIONS::MoreThan( 1 ) );
 menu->AddItem( PCB_ACTIONS::intersectPolygons, SELECTION_CONDITIONS::OnlyTypes( polygonBooleanTypes )
 && SELECTION_CONDITIONS::MoreThan( 1 ) );
 // clang-format on
 
 return menu;
};
 
bool EDIT_TOOL::Init()
{
 // Find the selection tool, so they can cooperate
 m_selectionTool = m_toolMgr->GetTool<PCB_SELECTION_TOOL>();
 
 std::shared_ptr<CONDITIONAL_MENU> positioningToolsSubMenu = makePositioningToolsMenu( this );
 m_selectionTool->GetToolMenu().RegisterSubMenu( positioningToolsSubMenu );
 
 std::shared_ptr<CONDITIONAL_MENU> shapeModificationSubMenu = makeShapeModificationMenu( this );
 m_selectionTool->GetToolMenu().RegisterSubMenu( shapeModificationSubMenu );
 
 auto positioningToolsCondition =
 [&]( const SELECTION& aSel )
 {
 std::shared_ptr<CONDITIONAL_MENU> subMenu = makePositioningToolsMenu( this );
 subMenu->Evaluate( aSel );
 return subMenu->GetMenuItemCount() > 0;
 };
 
 auto shapeModificationCondition =
 [&]( const SELECTION& aSel )
 {
 std::shared_ptr<CONDITIONAL_MENU> subMenu = makeShapeModificationMenu( this );
 subMenu->Evaluate( aSel );
 return subMenu->GetMenuItemCount() > 0;
 };
 
 auto propertiesCondition =
 [&]( const SELECTION& aSel )
 {
 if( aSel.GetSize() == 0 )
 {
 if( getView()->IsLayerVisible( LAYER_SCHEMATIC_DRAWINGSHEET ) )
 {
 DS_PROXY_VIEW_ITEM* ds = canvas()->GetDrawingSheet();
 VECTOR2D cursor = getViewControls()->GetCursorPosition( false );
 
 if( ds && ds->HitTestDrawingSheetItems( getView(), cursor ) )
 return true;
 }
 
 return false;
 }
 
 if( aSel.GetSize() == 1 )
 return true;
 
 for( EDA_ITEM* item : aSel )
 {
 if( !dynamic_cast<PCB_TRACK*>( item ) )
 return false;
 }
 
 return true;
 };
 
 auto inFootprintEditor =
 [ this ]( const SELECTION& aSelection )
 {
 return m_isFootprintEditor;
 };
 
 auto canMirror =
 [ this ]( const SELECTION& aSelection )
 {
 if( !m_isFootprintEditor
 && SELECTION_CONDITIONS::OnlyTypes( padTypes )( aSelection ) )
 {
 return false;
 }
 
 if( SELECTION_CONDITIONS::HasTypes( groupTypes )( aSelection ) )
 return true;
 
 return SELECTION_CONDITIONS::HasTypes( EDIT_TOOL::MirrorableItems )( aSelection );
 };
 
 auto singleFootprintCondition = SELECTION_CONDITIONS::OnlyTypes( footprintTypes )
 && SELECTION_CONDITIONS::Count( 1 );
 
 auto multipleFootprintsCondition =
 []( const SELECTION& aSelection )
 {
 bool foundFirst = false;
 
 for( EDA_ITEM* item : aSelection )
 {
 if( item->Type() == PCB_FOOTPRINT_T )
 {
 if( foundFirst )
 return true;
 else
 foundFirst = true;
 }
 }
 
 return false;
 };
 
 auto noActiveToolCondition =
 [ this ]( const SELECTION& aSelection )
 {
 return frame()->ToolStackIsEmpty();
 };
 
 auto notMovingCondition =
 []( const SELECTION& aSelection )
 {
 return aSelection.Empty() || !aSelection.Front()->IsMoving();
 };
 
 auto noItemsCondition =
 [ this ]( const SELECTION& aSelections ) -> bool
 {
 return frame()->GetBoard() && !frame()->GetBoard()->IsEmpty();
 };
 
 auto isSkippable =
 [ this ]( const SELECTION& aSelection )
 {
 return frame()->IsCurrentTool( PCB_ACTIONS::moveIndividually );
 };
 
 // Add context menu entries that are displayed when selection tool is active
 CONDITIONAL_MENU& menu = m_selectionTool->GetToolMenu().GetMenu();
 
 // clang-format off
 menu.AddItem( PCB_ACTIONS::move, SELECTION_CONDITIONS::NotEmpty
 && notMovingCondition );
 menu.AddItem( PCB_ACTIONS::unrouteSelected, SELECTION_CONDITIONS::NotEmpty
 && SELECTION_CONDITIONS::OnlyTypes( unroutableTypes )
 && notMovingCondition
 && !inFootprintEditor );
 menu.AddItem( PCB_ACTIONS::moveIndividually, SELECTION_CONDITIONS::MoreThan( 1 )
 && notMovingCondition );
 menu.AddItem( PCB_ACTIONS::skip, isSkippable );
 menu.AddItem( PCB_ACTIONS::breakTrack, SELECTION_CONDITIONS::Count( 1 )
 && SELECTION_CONDITIONS::OnlyTypes( trackTypes ) );
 menu.AddItem( PCB_ACTIONS::drag45Degree, SELECTION_CONDITIONS::Count( 1 )
 && SELECTION_CONDITIONS::OnlyTypes( GENERAL_COLLECTOR::DraggableItems ) );
 menu.AddItem( PCB_ACTIONS::dragFreeAngle, SELECTION_CONDITIONS::Count( 1 )
 && SELECTION_CONDITIONS::OnlyTypes( GENERAL_COLLECTOR::DraggableItems )
 && !SELECTION_CONDITIONS::OnlyTypes( footprintTypes ) );
 menu.AddItem( PCB_ACTIONS::filletTracks, SELECTION_CONDITIONS::OnlyTypes( trackTypes ) );
 menu.AddItem( PCB_ACTIONS::rotateCcw, SELECTION_CONDITIONS::NotEmpty );
 menu.AddItem( PCB_ACTIONS::rotateCw, SELECTION_CONDITIONS::NotEmpty );
 menu.AddItem( PCB_ACTIONS::flip, SELECTION_CONDITIONS::NotEmpty );
 menu.AddItem( PCB_ACTIONS::mirrorH, canMirror );
 menu.AddItem( PCB_ACTIONS::mirrorV, canMirror );
 menu.AddItem( PCB_ACTIONS::swap, SELECTION_CONDITIONS::MoreThan( 1 ) );
 menu.AddItem( PCB_ACTIONS::packAndMoveFootprints, SELECTION_CONDITIONS::MoreThan( 1 )
 && SELECTION_CONDITIONS::HasType( PCB_FOOTPRINT_T ) );
 
 menu.AddItem( PCB_ACTIONS::properties, propertiesCondition );
 
 menu.AddItem( PCB_ACTIONS::assignNetClass, SELECTION_CONDITIONS::OnlyTypes( connectedTypes )
 && !inFootprintEditor );
 menu.AddItem( PCB_ACTIONS::inspectClearance, SELECTION_CONDITIONS::Count( 2 ) );
 
 // Footprint actions
 menu.AddSeparator();
 menu.AddItem( PCB_ACTIONS::editFpInFpEditor, singleFootprintCondition );
 menu.AddItem( PCB_ACTIONS::updateFootprint, singleFootprintCondition );
 menu.AddItem( PCB_ACTIONS::updateFootprints, multipleFootprintsCondition );
 menu.AddItem( PCB_ACTIONS::changeFootprint, singleFootprintCondition );
 menu.AddItem( PCB_ACTIONS::changeFootprints, multipleFootprintsCondition );
 
 // Add the submenu for the special tools: modfiers and positioning tools
 menu.AddSeparator( 100 );
 menu.AddMenu( shapeModificationSubMenu.get(), shapeModificationCondition, 100 );
 menu.AddMenu( positioningToolsSubMenu.get(), positioningToolsCondition, 100 );
 
 menu.AddSeparator( 150 );
 menu.AddItem( ACTIONS::cut, SELECTION_CONDITIONS::NotEmpty, 150 );
 menu.AddItem( ACTIONS::copy, SELECTION_CONDITIONS::NotEmpty, 150 );
 
 // Selection tool handles the context menu for some other tools, such as the Picker.
 // Don't add things like Paste when another tool is active.
 menu.AddItem( ACTIONS::paste, noActiveToolCondition, 150 );
 menu.AddItem( ACTIONS::pasteSpecial, noActiveToolCondition && !inFootprintEditor, 150 );
 menu.AddItem( ACTIONS::duplicate, SELECTION_CONDITIONS::NotEmpty, 150 );
 menu.AddItem( ACTIONS::doDelete, SELECTION_CONDITIONS::NotEmpty, 150 );
 
 menu.AddSeparator( 150 );
 menu.AddItem( ACTIONS::selectAll, noItemsCondition, 150 );
 menu.AddItem( ACTIONS::unselectAll, noItemsCondition, 150 );
 // clang-format on
 
 return true;
}
 
 
int EDIT_TOOL::GetAndPlace( const TOOL_EVENT& aEvent )
{
 // GetAndPlace makes sense only in board editor, although it is also called
 // in fpeditor, that shares the same EDIT_TOOL list
 if( !getEditFrame<PCB_BASE_FRAME>()->IsType( FRAME_PCB_EDITOR ) )
 return 0;
 
 PCB_SELECTION_TOOL* selectionTool = m_toolMgr->GetTool<PCB_SELECTION_TOOL>();
 FOOTPRINT* fp = getEditFrame<PCB_BASE_FRAME>()->GetFootprintFromBoardByReference();
 
 if( fp )
 {
 m_toolMgr->RunAction( PCB_ACTIONS::selectionClear );
 m_toolMgr->RunAction<EDA_ITEM*>( PCB_ACTIONS::selectItem, fp );
 
 selectionTool->GetSelection().SetReferencePoint( fp->GetPosition() );
 m_toolMgr->PostAction( PCB_ACTIONS::move );
 }
 
 return 0;
}
 
 
bool EDIT_TOOL::invokeInlineRouter( int aDragMode )
{
 ROUTER_TOOL* theRouter = m_toolMgr->GetTool<ROUTER_TOOL>();
 
 if( !theRouter )
 return false;
 
 // don't allow switch from moving to dragging
 if( m_dragging )
 {
 wxBell();
 return false;
 }
 
 // make sure we don't accidentally invoke inline routing mode while the router is already
 // active!
 if( theRouter->IsToolActive() )
 return false;
 
 if( theRouter->CanInlineDrag( aDragMode ) )
 {
 m_toolMgr->RunAction( PCB_ACTIONS::routerInlineDrag, aDragMode );
 return true;
 }
 
 return false;
}
 
 
bool EDIT_TOOL::isRouterActive() const
{
 ROUTER_TOOL* router = m_toolMgr->GetTool<ROUTER_TOOL>();
 
 return router && router->RoutingInProgress();
}
 
 
int EDIT_TOOL::Drag( const TOOL_EVENT& aEvent )
{
 if( !m_toolMgr->GetTool<ROUTER_TOOL>() )
 {
 wxBell();
 return false; // don't drag when no router tool (i.e. fp editor)
 }
 
 if( m_toolMgr->GetTool<ROUTER_TOOL>()->IsToolActive() )
 {
 wxBell();
 return false; // don't drag when router is already active
 }
 
 if( m_dragging )
 {
 wxBell();
 return false; // don't do a router drag when already in an EDIT_TOOL drag
 }
 
 int mode = PNS::DM_ANY;
 
 if( aEvent.IsAction( &PCB_ACTIONS::dragFreeAngle ) )
 mode |= PNS::DM_FREE_ANGLE;
 
 PCB_SELECTION& selection = m_selectionTool->RequestSelection(
 []( const VECTOR2I& aPt, GENERAL_COLLECTOR& aCollector, PCB_SELECTION_TOOL* sTool )
 {
 sTool->FilterCollectorForFreePads( aCollector );
 sTool->FilterCollectorForHierarchy( aCollector, true );
 
 std::vector<PCB_TRACK*> tracks;
 std::vector<PCB_TRACK*> vias;
 std::vector<FOOTPRINT*> footprints;
 
 for( EDA_ITEM* item : aCollector )
 {
 if( PCB_TRACK* track = dynamic_cast<PCB_TRACK*>( item ) )
 {
 if( track->Type() == PCB_VIA_T )
 vias.push_back( track );
 else
 tracks.push_back( track );
 }
 else if( FOOTPRINT* footprint = dynamic_cast<FOOTPRINT*>( item ) )
 {
 footprints.push_back( footprint );
 }
 }
 
 if( footprints.size() == (unsigned) aCollector.GetCount() )
 {
 // We can drag multiple footprints; no need to whittle down selection.
 }
 else if( tracks.size() || vias.size() )
 {
 /*
 * First trim down selection to active layer, tracks vs zones, etc.
 */
 if( aCollector.GetCount() > 1 )
 sTool->GuessSelectionCandidates( aCollector, aPt );
 
 /*
 * If we have a knee between two tracks, or a via attached to two tracks,
 * then drop the selection to a single item. We don't want a selection
 * disambiguation menu when it doesn't matter which items is picked.
 */
 auto connected = []( PCB_TRACK* track, const VECTOR2I& pt )
 {
 return track->GetStart() == pt || track->GetEnd() == pt;
 };
 
 if( tracks.size() == 2 && vias.size() == 0 )
 {
 if( connected( tracks[0], tracks[1]->GetStart() )
 || connected( tracks[0], tracks[1]->GetEnd() ) )
 {
 aCollector.Remove( tracks[1] );
 }
 }
 else if( tracks.size() == 2 && vias.size() == 1 )
 {
 if( connected( tracks[0], vias[0]->GetPosition() )
 && connected( tracks[1], vias[0]->GetPosition() ) )
 {
 aCollector.Remove( tracks[0] );
 aCollector.Remove( tracks[1] );
 }
 }
 }
 },
 true /* prompt user regarding locked items */ );
 
 if( selection.Empty() )
 return 0;
 
 if( selection.Size() == 1 && selection.Front()->Type() == PCB_ARC_T )
 {
 // TODO: This really should be done in PNS to ensure DRC is maintained, but for now
 // it allows interactive editing of an arc track
 return DragArcTrack( aEvent );
 }
 else
 {
 invokeInlineRouter( mode );
 }
 
 return 0;
}
 
 
int EDIT_TOOL::DragArcTrack( const TOOL_EVENT& aEvent )
{
 PCB_SELECTION& selection = m_selectionTool->GetSelection();
 
 if( selection.Size() != 1 || selection.Front()->Type() != PCB_ARC_T )
 return 0;
 
 PCB_ARC* theArc = static_cast<PCB_ARC*>( selection.Front() );
 EDA_ANGLE maxTangentDeviation( ADVANCED_CFG::GetCfg().m_MaxTangentAngleDeviation, DEGREES_T );
 
 if( theArc->GetAngle() + maxTangentDeviation >= ANGLE_180 )
 {
 wxString msg = wxString::Format( _( "Unable to resize arc tracks of %s or greater." ),
 EDA_UNIT_UTILS::UI::MessageTextFromValue( ANGLE_180 - maxTangentDeviation ) );
 frame()->ShowInfoBarError( msg );
 
 return 0; // don't bother with > 180 degree arcs
 }
 
 KIGFX::VIEW_CONTROLS* controls = getViewControls();
 
 Activate();
 // Must be done after Activate() so that it gets set into the correct context
 controls->ShowCursor( true );
 controls->SetAutoPan( true );
 
 BOARD_COMMIT commit( this );
 bool restore_state = false;
 
 commit.Modify( theArc );
 
 VECTOR2I arcCenter = theArc->GetCenter();
 SEG tanStart = SEG( arcCenter, theArc->GetStart() ).PerpendicularSeg( theArc->GetStart() );
 SEG tanEnd = SEG( arcCenter, theArc->GetEnd() ).PerpendicularSeg( theArc->GetEnd() );
 
 //Ensure the tangent segments are in the correct orientation
 OPT_VECTOR2I tanIntersect = tanStart.IntersectLines( tanEnd );
 
 if( !tanIntersect )
 return 0;
 
 tanStart.A = *tanIntersect;
 tanStart.B = theArc->GetStart();
 tanEnd.A = *tanIntersect;
 tanEnd.B = theArc->GetEnd();
 
 std::set<PCB_TRACK*> addedTracks;
 
 auto getUniqueTrackAtAnchorCollinear =
 [&]( const VECTOR2I& aAnchor, const SEG& aCollinearSeg ) -> PCB_TRACK*
 {
 std::shared_ptr<CONNECTIVITY_DATA> conn = board()->GetConnectivity();
 
 // Allow items at a distance within the width of the arc track
 int allowedDeviation = theArc->GetWidth();
 
 std::vector<BOARD_CONNECTED_ITEM*> itemsOnAnchor;
 
 for( int i = 0; i < 3; i++ )
 {
 itemsOnAnchor = conn->GetConnectedItemsAtAnchor( theArc, aAnchor,
 baseConnectedTypes,
 allowedDeviation );
 allowedDeviation /= 2;
 
 if( itemsOnAnchor.size() == 1 )
 break;
 }
 
 PCB_TRACK* track = nullptr;
 
 if( itemsOnAnchor.size() == 1 && itemsOnAnchor.front()->Type() == PCB_TRACE_T )
 {
 track = static_cast<PCB_TRACK*>( itemsOnAnchor.front() );
 commit.Modify( track );
 
 SEG trackSeg( track->GetStart(), track->GetEnd() );
 
 // Allow deviations in colinearity as defined in ADVANCED_CFG
 if( trackSeg.Angle( aCollinearSeg ) > maxTangentDeviation )
 track = nullptr;
 }
 
 if( !track )
 {
 track = new PCB_TRACK( theArc->GetParent() );
 track->SetStart( aAnchor );
 track->SetEnd( aAnchor );
 track->SetNet( theArc->GetNet() );
 track->SetLayer( theArc->GetLayer() );
 track->SetWidth( theArc->GetWidth() );
 track->SetLocked( theArc->IsLocked() );
 track->SetFlags( IS_NEW );
 getView()->Add( track );
 addedTracks.insert( track );
 }
 
 return track;
 };
 
 PCB_TRACK* trackOnStart = getUniqueTrackAtAnchorCollinear( theArc->GetStart(), tanStart);
 PCB_TRACK* trackOnEnd = getUniqueTrackAtAnchorCollinear( theArc->GetEnd(), tanEnd );
 
 if( trackOnStart->GetLength() != 0 )
 {
 tanStart.A = trackOnStart->GetStart();
 tanStart.B = trackOnStart->GetEnd();
 }
 
 if( trackOnEnd->GetLength() != 0 )
 {
 tanEnd.A = trackOnEnd->GetStart();
 tanEnd.B = trackOnEnd->GetEnd();
 }
 
 // Recalculate intersection point
 if( tanIntersect = tanStart.IntersectLines( tanEnd ); !tanIntersect )
 return 0;
 
 auto isTrackStartClosestToArcStart =
 [&]( PCB_TRACK* aTrack ) -> bool
 {
 double trackStartToArcStart = aTrack->GetStart().Distance( theArc->GetStart() );
 double trackEndToArcStart = aTrack->GetEnd().Distance( theArc->GetStart() );
 
 return trackStartToArcStart < trackEndToArcStart;
 };
 
 bool isStartTrackOnStartPt = isTrackStartClosestToArcStart( trackOnStart );
 bool isEndTrackOnStartPt = isTrackStartClosestToArcStart( trackOnEnd );
 
 // Calculate constraints
 //======================
 // maxTanCircle is the circle with maximum radius that is tangent to the two adjacent straight
 // tracks and whose tangent points are constrained within the original tracks and their
 // projected intersection points.
 //
 // The cursor will be constrained first within the isosceles triangle formed by the segments
 // cSegTanStart, cSegTanEnd and cSegChord. After that it will be constrained to be outside
 // maxTanCircle.
 //
 //
 // ____________ <-cSegTanStart
 // / * . ' *
 // cSegTanEnd-> / * . ' *
 // /* . ' <-cSegChord *
 // /. '
 // /* *
 //
 // * c * <-maxTanCircle
 //
 // * *
 //
 // * *
 // * *
 // * *
 //
 
 auto getFurthestPointToTanInterstect =
 [&]( VECTOR2I& aPointA, VECTOR2I& aPointB ) -> VECTOR2I
 {
 if( ( aPointA - *tanIntersect ).EuclideanNorm()
 > ( aPointB - *tanIntersect ).EuclideanNorm() )
 {
 return aPointA;
 }
 else
 {
 return aPointB;
 }
 };
 
 CIRCLE maxTanCircle;
 VECTOR2I tanStartPoint = getFurthestPointToTanInterstect( tanStart.A, tanStart.B );
 VECTOR2I tanEndPoint = getFurthestPointToTanInterstect( tanEnd.A, tanEnd.B );
 VECTOR2I tempTangentPoint = tanEndPoint;
 
 if( getFurthestPointToTanInterstect( tanStartPoint, tanEndPoint ) == tanEndPoint )
 tempTangentPoint = tanStartPoint;
 
 maxTanCircle.ConstructFromTanTanPt( tanStart, tanEnd, tempTangentPoint );
 VECTOR2I maxTanPtStart = tanStart.LineProject( maxTanCircle.Center );
 VECTOR2I maxTanPtEnd = tanEnd.LineProject( maxTanCircle.Center );
 
 SEG cSegTanStart( maxTanPtStart, *tanIntersect );
 SEG cSegTanEnd( maxTanPtEnd, *tanIntersect );
 SEG cSegChord( maxTanPtStart, maxTanPtEnd );
 
 int cSegTanStartSide = cSegTanStart.Side( theArc->GetMid() );
 int cSegTanEndSide = cSegTanEnd.Side( theArc->GetMid() );
 int cSegChordSide = cSegChord.Side( theArc->GetMid() );
 
 bool eatFirstMouseUp = true;
 
 // Start the tool loop
 while( TOOL_EVENT* evt = Wait() )
 {
 m_cursor = controls->GetMousePosition();
 
 // Constrain cursor within the isosceles triangle
 if( cSegTanStartSide != cSegTanStart.Side( m_cursor )
 || cSegTanEndSide != cSegTanEnd.Side( m_cursor )
 || cSegChordSide != cSegChord.Side( m_cursor ) )
 {
 std::vector<VECTOR2I> possiblePoints;
 
 possiblePoints.push_back( cSegTanEnd.NearestPoint( m_cursor ) );
 possiblePoints.push_back( cSegChord.NearestPoint( m_cursor ) );
 
 VECTOR2I closest = cSegTanStart.NearestPoint( m_cursor );
 
 for( const VECTOR2I& candidate : possiblePoints )
 {
 if( ( candidate - m_cursor ).SquaredEuclideanNorm()
 < ( closest - m_cursor ).SquaredEuclideanNorm() )
 {
 closest = candidate;
 }
 }
 
 m_cursor = closest;
 }
 
 // Constrain cursor to be outside maxTanCircle
 if( ( m_cursor - maxTanCircle.Center ).EuclideanNorm() < maxTanCircle.Radius )
 m_cursor = maxTanCircle.NearestPoint( m_cursor );
 
 controls->ForceCursorPosition( true, m_cursor );
 
 // Calculate resulting object coordinates
 CIRCLE circlehelper;
 circlehelper.ConstructFromTanTanPt( cSegTanStart, cSegTanEnd, m_cursor );
 
 VECTOR2I newCenter = circlehelper.Center;
 VECTOR2I newStart = cSegTanStart.LineProject( newCenter );
 VECTOR2I newEnd = cSegTanEnd.LineProject( newCenter );
 VECTOR2I newMid = CalcArcMid( newStart, newEnd, newCenter );
 
 // Update objects
 theArc->SetStart( newStart );
 theArc->SetEnd( newEnd );
 theArc->SetMid( newMid );
 
 if( isStartTrackOnStartPt )
 trackOnStart->SetStart( newStart );
 else
 trackOnStart->SetEnd( newStart );
 
 if( isEndTrackOnStartPt )
 trackOnEnd->SetStart( newEnd );
 else
 trackOnEnd->SetEnd( newEnd );
 
 // Update view
 getView()->Update( trackOnStart );
 getView()->Update( trackOnEnd );
 getView()->Update( theArc );
 
 // Handle events
 if( evt->IsMotion() || evt->IsDrag( BUT_LEFT ) )
 {
 eatFirstMouseUp = false;
 }
 else if( evt->IsCancelInteractive() || evt->IsActivate() )
 {
 restore_state = true; // Canceling the tool means that items have to be restored
 break; // Finish
 }
 else if( evt->IsAction( &ACTIONS::undo ) )
 {
 restore_state = true; // Perform undo locally
 break; // Finish
 }
 else if( evt->IsMouseUp( BUT_LEFT ) || evt->IsClick( BUT_LEFT )
 || evt->IsDblClick( BUT_LEFT ) )
 {
 // Eat mouse-up/-click events that leaked through from the lock dialog
 if( eatFirstMouseUp && !evt->IsAction( &ACTIONS::cursorClick ) )
 {
 eatFirstMouseUp = false;
 continue;
 }
 
 break; // Finish
 }
 }
 
 // Amend the end points of the arc if we delete the joining tracks
 VECTOR2I newStart = trackOnStart->GetStart();
 VECTOR2I newEnd = trackOnEnd->GetStart();
 
 if( isStartTrackOnStartPt )
 newStart = trackOnStart->GetEnd();
 
 if( isEndTrackOnStartPt )
 newEnd = trackOnEnd->GetEnd();
 
 int maxLengthIU =
 KiROUND( ADVANCED_CFG::GetCfg().m_MaxTrackLengthToKeep * pcbIUScale.IU_PER_MM );
 
 if( trackOnStart->GetLength() <= maxLengthIU )
 {
 if( addedTracks.count( trackOnStart ) )
 {
 getView()->Remove( trackOnStart );
 addedTracks.erase( trackOnStart );
 delete trackOnStart;
 }
 else
 {
 commit.Remove( trackOnStart );
 }
 
 theArc->SetStart( newStart );
 }
 
 if( trackOnEnd->GetLength() <= maxLengthIU )
 {
 if( addedTracks.count( trackOnEnd ) )
 {
 getView()->Remove( trackOnEnd );
 addedTracks.erase( trackOnEnd );
 delete trackOnEnd;
 }
 else
 {
 commit.Remove( trackOnEnd );
 }
 
 theArc->SetEnd( newEnd );
 }
 
 if( theArc->GetLength() <= 0 )
 commit.Remove( theArc );
 
 for( PCB_TRACK* added : addedTracks )
 {
 getView()->Remove( added );
 commit.Add( added );
 }
 
 // Should we commit?
 if( restore_state )
 commit.Revert();
 else
 commit.Push( _( "Drag Arc Track" ) );
 
 return 0;
}
 
 
int EDIT_TOOL::ChangeTrackWidth( const TOOL_EVENT& aEvent )
{
 const PCB_SELECTION& selection = m_selectionTool->RequestSelection(
 []( const VECTOR2I& aPt, GENERAL_COLLECTOR& aCollector, PCB_SELECTION_TOOL* sTool )
 {
 // Iterate from the back so we don't have to worry about removals.
 for( int i = aCollector.GetCount() - 1; i >= 0; --i )
 {
 BOARD_ITEM* item = aCollector[ i ];
 
 if( !dynamic_cast<PCB_TRACK*>( item ) )
 aCollector.Remove( item );
 }
 },
 true /* prompt user regarding locked items */ );
 
 BOARD_COMMIT commit( this );
 
 for( EDA_ITEM* item : selection )
 {
 if( item->Type() == PCB_VIA_T )
 {
 PCB_VIA* via = static_cast<PCB_VIA*>( item );
 
 commit.Modify( via );
 
 int new_width;
 int new_drill;
 
 if( via->GetViaType() == VIATYPE::MICROVIA )
 {
 NETCLASS* netClass = via->GetEffectiveNetClass();
 
 new_width = netClass->GetuViaDiameter();
 new_drill = netClass->GetuViaDrill();
 }
 else
 {
 new_width = board()->GetDesignSettings().GetCurrentViaSize();
 new_drill = board()->GetDesignSettings().GetCurrentViaDrill();
 }
 
 via->SetDrill( new_drill );
 via->SetWidth( new_width );
 }
 else if( item->Type() == PCB_TRACE_T || item->Type() == PCB_ARC_T )
 {
 PCB_TRACK* track = dynamic_cast<PCB_TRACK*>( item );
 
 wxCHECK( track, 0 );
 
 commit.Modify( track );
 
 int new_width = board()->GetDesignSettings().GetCurrentTrackWidth();
 track->SetWidth( new_width );
 }
 }
 
 commit.Push( _( "Edit Track Width/Via Size" ) );
 
 if( selection.IsHover() )
 {
 m_toolMgr->RunAction( PCB_ACTIONS::selectionClear );
 
 // Notify other tools of the changes -- This updates the visual ratsnest
 m_toolMgr->ProcessEvent( EVENTS::SelectedItemsModified );
 }
 
 return 0;
}
 
 
int EDIT_TOOL::FilletTracks( const TOOL_EVENT& aEvent )
{
 // Store last used fillet radius to allow pressing "enter" if repeat fillet is required
 static int filletRadius = 0;
 
 PCB_SELECTION& selection = m_selectionTool->RequestSelection(
 []( const VECTOR2I& aPt, GENERAL_COLLECTOR& aCollector, PCB_SELECTION_TOOL* sTool )
 {
 // Iterate from the back so we don't have to worry about removals.
 for( int i = aCollector.GetCount() - 1; i >= 0; --i )
 {
 BOARD_ITEM* item = aCollector[i];
 
 if( !dynamic_cast<PCB_TRACK*>( item ) )
 aCollector.Remove( item );
 }
 },
 true /* prompt user regarding locked items */ );
 
 if( selection.Size() < 2 )
 {
 frame()->ShowInfoBarMsg( _( "At least two straight track segments must be selected." ) );
 return 0;
 }
 
 WX_UNIT_ENTRY_DIALOG dlg( frame(), _( "Fillet Tracks" ), _( "Radius:" ), filletRadius );
 
 if( dlg.ShowModal() == wxID_CANCEL || dlg.GetValue() == 0 )
 return 0;
 
 filletRadius = dlg.GetValue();
 
 struct FILLET_OP
 {
 PCB_TRACK* t1;
 PCB_TRACK* t2;
 // Start point of track is modified after PCB_ARC is added, otherwise the end point:
 bool t1Start = true;
 bool t2Start = true;
 };
 
 std::vector<FILLET_OP> filletOperations;
 bool operationPerformedOnAtLeastOne = false;
 bool didOneAttemptFail = false;
 std::set<PCB_TRACK*> processedTracks;
 
 auto processFilletOp =
 [&]( PCB_TRACK* aTrack, bool aStartPoint )
 {
 std::shared_ptr<CONNECTIVITY_DATA> c = board()->GetConnectivity();
 VECTOR2I anchor = aStartPoint ? aTrack->GetStart() : aTrack->GetEnd();
 std::vector<BOARD_CONNECTED_ITEM*> itemsOnAnchor;
 
 itemsOnAnchor = c->GetConnectedItemsAtAnchor( aTrack, anchor, baseConnectedTypes );
 
 if( itemsOnAnchor.size() > 0
 && selection.Contains( itemsOnAnchor.at( 0 ) )
 && itemsOnAnchor.at( 0 )->Type() == PCB_TRACE_T )
 {
 PCB_TRACK* trackOther = static_cast<PCB_TRACK*>( itemsOnAnchor.at( 0 ) );
 
 // Make sure we don't fillet the same pair of tracks twice
 if( processedTracks.find( trackOther ) == processedTracks.end() )
 {
 if( itemsOnAnchor.size() == 1 )
 {
 FILLET_OP filletOp;
 filletOp.t1 = aTrack;
 filletOp.t2 = trackOther;
 filletOp.t1Start = aStartPoint;
 filletOp.t2Start = aTrack->IsPointOnEnds( filletOp.t2->GetStart() );
 filletOperations.push_back( filletOp );
 }
 else
 {
 // User requested to fillet these two tracks but not possible as
 // there are other elements connected at that point
 didOneAttemptFail = true;
 }
 }
 }
 };
 
 for( EDA_ITEM* item : selection )
 {
 if( item->Type() == PCB_TRACE_T )
 {
 PCB_TRACK* track = static_cast<PCB_TRACK*>( item );
 
 if( track->GetLength() > 0 )
 {
 processFilletOp( track, true ); // on the start point of track
 processFilletOp( track, false ); // on the end point of track
 
 processedTracks.insert( track );
 }
 }
 }
 
 BOARD_COMMIT commit( this );
 std::vector<BOARD_ITEM*> itemsToAddToSelection;
 
 for( FILLET_OP filletOp : filletOperations )
 {
 PCB_TRACK* track1 = filletOp.t1;
 PCB_TRACK* track2 = filletOp.t2;
 
 bool trackOnStart = track1->IsPointOnEnds( track2->GetStart() );
 bool trackOnEnd = track1->IsPointOnEnds( track2->GetEnd() );
 
 if( trackOnStart && trackOnEnd )
 continue; // Ignore duplicate tracks
 
 if( ( trackOnStart || trackOnEnd ) && track1->GetLayer() == track2->GetLayer() )
 {
 SEG t1Seg( track1->GetStart(), track1->GetEnd() );
 SEG t2Seg( track2->GetStart(), track2->GetEnd() );
 
 if( t1Seg.ApproxCollinear( t2Seg ) )
 continue;
 
 SHAPE_ARC sArc( t1Seg, t2Seg, filletRadius );
 VECTOR2I t1newPoint, t2newPoint;
 
 auto setIfPointOnSeg =
 []( VECTOR2I& aPointToSet, const SEG& aSegment, const VECTOR2I& aVecToTest )
 {
 VECTOR2I segToVec = aSegment.NearestPoint( aVecToTest ) - aVecToTest;
 
 // Find out if we are on the segment (minimum precision)
 if( segToVec.EuclideanNorm() < SHAPE_ARC::MIN_PRECISION_IU )
 {
 aPointToSet.x = aVecToTest.x;
 aPointToSet.y = aVecToTest.y;
 return true;
 }
 
 return false;
 };
 
 //Do not draw a fillet if the end points of the arc are not within the track segments
 if( !setIfPointOnSeg( t1newPoint, t1Seg, sArc.GetP0() )
 && !setIfPointOnSeg( t2newPoint, t2Seg, sArc.GetP0() ) )
 {
 didOneAttemptFail = true;
 continue;
 }
 
 if( !setIfPointOnSeg( t1newPoint, t1Seg, sArc.GetP1() )
 && !setIfPointOnSeg( t2newPoint, t2Seg, sArc.GetP1() ) )
 {
 didOneAttemptFail = true;
 continue;
 }
 
 PCB_ARC* tArc = new PCB_ARC( frame()->GetBoard(), &sArc );
 tArc->SetLayer( track1->GetLayer() );
 tArc->SetWidth( track1->GetWidth() );
 tArc->SetNet( track1->GetNet() );
 tArc->SetLocked( track1->IsLocked() );
 commit.Add( tArc );
 itemsToAddToSelection.push_back( tArc );
 
 commit.Modify( track1 );
 commit.Modify( track2 );
 
 if( filletOp.t1Start )
 track1->SetStart( t1newPoint );
 else
 track1->SetEnd( t1newPoint );
 
 if( filletOp.t2Start )
 track2->SetStart( t2newPoint );
 else
 track2->SetEnd( t2newPoint );
 
 operationPerformedOnAtLeastOne = true;
 }
 }
 
 commit.Push( _( "Fillet Tracks" ) );
 
 //select the newly created arcs
 for( BOARD_ITEM* item : itemsToAddToSelection )
 m_selectionTool->AddItemToSel( item );
 
 if( !operationPerformedOnAtLeastOne )
 frame()->ShowInfoBarMsg( _( "Unable to fillet the selected track segments." ) );
 else if( didOneAttemptFail )
 frame()->ShowInfoBarMsg( _( "Some of the track segments could not be filleted." ) );
 
 return 0;
}
 
 
static std::optional<int> GetFilletParams( PCB_BASE_EDIT_FRAME& aFrame )
{
 // Store last used fillet radius to allow pressing "enter" if repeat fillet is required
 static int filletRadius = 0;
 
 WX_UNIT_ENTRY_DIALOG dlg( &aFrame, _( "Fillet Lines" ), _( "Radius:" ), filletRadius );
 
 if( dlg.ShowModal() == wxID_CANCEL || dlg.GetValue() == 0 )
 return std::nullopt;
 
 filletRadius = dlg.GetValue();
 
 return filletRadius;
}
 
 
static std::optional<CHAMFER_PARAMS> GetChamferParams( PCB_BASE_EDIT_FRAME& aFrame )
{
 // Non-zero and the KLC default for Fab layer chamfers
 const int default_setback = pcbIUScale.mmToIU( 1 );
 // Store last used setback to allow pressing "enter" if repeat chamfer is required
 static CHAMFER_PARAMS params{ default_setback, default_setback };
 
 WX_UNIT_ENTRY_DIALOG dlg( &aFrame, _( "Chamfer Lines" ), _( "Chamfer setback:" ),
 params.m_chamfer_setback_a );
 
 if( dlg.ShowModal() == wxID_CANCEL || dlg.GetValue() == 0 )
 return std::nullopt;
 
 params.m_chamfer_setback_a = dlg.GetValue();
 // It's hard to easily specify an asymmetric chamfer (which line gets the longer setback?),
 // so we just use the same setback for each
 params.m_chamfer_setback_b = params.m_chamfer_setback_a;
 
 return params;
}
 
 
int EDIT_TOOL::ModifyLines( const TOOL_EVENT& aEvent )
{
 PCB_SELECTION& selection = m_selectionTool->RequestSelection(
 []( const VECTOR2I& aPt, GENERAL_COLLECTOR& aCollector, PCB_SELECTION_TOOL* sTool )
 {
 std::vector<VECTOR2I> pts;
 
 // Iterate from the back so we don't have to worry about removals.
 for( int i = aCollector.GetCount() - 1; i >= 0; --i )
 {
 BOARD_ITEM* item = aCollector[i];
 
 // We've converted the polygon and rectangle to segments, so drop everything
 // that isn't a segment at this point
 if( !item->IsType( { PCB_SHAPE_LOCATE_SEGMENT_T,
 PCB_SHAPE_LOCATE_POLY_T,
 PCB_SHAPE_LOCATE_RECT_T } ) )
 {
 aCollector.Remove( item );
 }
 }
 },
 true /* prompt user regarding locked items */ );
 
 std::set<PCB_SHAPE*> lines_to_add;
 std::vector<PCB_SHAPE*> items_to_remove;
 
 for( EDA_ITEM* item : selection )
 {
 std::vector<VECTOR2I> pts;
 PCB_SHAPE *graphic = static_cast<PCB_SHAPE*>( item );
 PCB_LAYER_ID layer = graphic->GetLayer();
 int width = graphic->GetWidth();
 
 if( graphic->GetShape() == SHAPE_T::RECTANGLE )
 {
 items_to_remove.push_back( graphic );
 VECTOR2I start( graphic->GetStart() );
 VECTOR2I end( graphic->GetEnd() );
 pts.emplace_back( start );
 pts.emplace_back( VECTOR2I( end.x, start.y ) );
 pts.emplace_back( end );
 pts.emplace_back( VECTOR2I( start.x, end.y ) );
 }
 
 if( graphic->GetShape() == SHAPE_T::POLY )
 {
 items_to_remove.push_back( graphic );
 
 for( int jj = 0; jj < graphic->GetPolyShape().VertexCount(); ++jj )
 pts.emplace_back( graphic->GetPolyShape().CVertex( jj ) );
 }
 
 for( size_t jj = 1; jj < pts.size(); ++jj )
 {
 PCB_SHAPE *line = new PCB_SHAPE( frame()->GetModel(), SHAPE_T::SEGMENT );
 
 line->SetStart( pts[jj - 1] );
 line->SetEnd( pts[jj] );
 line->SetWidth( width );
 line->SetLayer( layer );
 lines_to_add.insert( line );
 }
 
 if( pts.size() > 1 )
 {
 PCB_SHAPE *line = new PCB_SHAPE( frame()->GetModel(), SHAPE_T::SEGMENT );
 
 line->SetStart( pts.back() );
 line->SetEnd( pts.front() );
 line->SetWidth( width );
 line->SetLayer( layer );
 lines_to_add.insert( line );
 }
 }
 
 int segmentCount = selection.CountType( PCB_SHAPE_LOCATE_SEGMENT_T ) + lines_to_add.size();
 
 if( aEvent.IsAction( &PCB_ACTIONS::extendLines ) && segmentCount != 2 )
 {
 frame()->ShowInfoBarMsg( _( "Exactly two lines must be selected to extend them." ) );
 
 for( PCB_SHAPE* line : lines_to_add )
 delete line;
 
 return 0;
 }
 else if( segmentCount < 2 )
 {
 frame()->ShowInfoBarMsg( _( "A shape with at least two lines must be selected." ) );
 
 for( PCB_SHAPE* line : lines_to_add )
 delete line;
 
 return 0;
 }
 
 BOARD_COMMIT commit( this );
 
 // Items created like lines from a rectangle
 for( PCB_SHAPE* item : lines_to_add )
 {
 commit.Add( item );
 selection.Add( item );
 }
 
 // Remove items like rectangles that we decomposed into lines
 for( PCB_SHAPE* item : items_to_remove )
 {
 selection.Remove( item );
 commit.Remove( item );
 }
 
 for( EDA_ITEM* item : selection )
 item->ClearFlags( STRUCT_DELETED );
 
 // List of thing to select at the end of the operation
 // (doing it as we go will invalidate the iterator)
 std::vector<PCB_SHAPE*> items_to_select_on_success;
 
 // And same for items to deselect
 std::vector<PCB_SHAPE*> items_to_deselect_on_success;
 
 // Handle modifications to existing items by the routine
 // How to deal with this depends on whether we're in the footprint editor or not
 // and whether the item was conjured up by decomposing a polygon or rectangle
 auto item_modification_handler =
 [&]( PCB_SHAPE& aItem )
 {
 // If the item was "conjured up" it will be added later separately
 if( !alg::contains( lines_to_add, &aItem ) )
 {
 commit.Modify( &aItem );
 items_to_select_on_success.push_back( &aItem );
 }
 };
 
 bool any_items_created = !lines_to_add.empty();
 auto item_creation_handler =
 [&]( std::unique_ptr<PCB_SHAPE> aItem )
 {
 any_items_created = true;
 items_to_select_on_success.push_back( aItem.get() );
 commit.Add( aItem.release() );
 };
 
 bool any_items_removed = !items_to_remove.empty();
 auto item_removal_handler =
 [&]( PCB_SHAPE& aItem )
 {
 aItem.SetFlags( STRUCT_DELETED );
 any_items_removed = true;
 items_to_deselect_on_success.push_back( &aItem );
 commit.Remove( &aItem );
 };
 
 // Combine these callbacks into a CHANGE_HANDLER to inject in the ROUTINE
 ITEM_MODIFICATION_ROUTINE::CALLABLE_BASED_HANDLER change_handler(
 item_creation_handler, item_modification_handler, item_removal_handler );
 
 // Construct an appropriate tool
 std::unique_ptr<PAIRWISE_LINE_ROUTINE> pairwise_line_routine;
 
 if( aEvent.IsAction( &PCB_ACTIONS::filletLines ) )
 {
 std::optional<int> filletRadiusIU = GetFilletParams( *frame() );
 
 if( filletRadiusIU.has_value() )
 {
 pairwise_line_routine = std::make_unique<LINE_FILLET_ROUTINE>( frame()->GetModel(),
 change_handler,
 *filletRadiusIU );
 }
 }
 else if( aEvent.IsAction( &PCB_ACTIONS::chamferLines ) )
 {
 std::optional<CHAMFER_PARAMS> chamfer_params = GetChamferParams( *frame() );
 
 if( chamfer_params.has_value() )
 {
 pairwise_line_routine = std::make_unique<LINE_CHAMFER_ROUTINE>( frame()->GetModel(),
 change_handler,
 *chamfer_params );
 }
 }
 else if( aEvent.IsAction( &PCB_ACTIONS::extendLines ) )
 {
 pairwise_line_routine = std::make_unique<LINE_EXTENSION_ROUTINE>( frame()->GetModel(),
 change_handler );
 }
 
 if( !pairwise_line_routine )
 {
 // Didn't construct any mofication routine - user must have cancelled
 commit.Revert();
 return 0;
 }
 
 // Apply the tool to every line pair
 alg::for_all_pairs( selection.begin(), selection.end(),
 [&]( EDA_ITEM* a, EDA_ITEM* b )
 {
 if( ( a->GetFlags() & STRUCT_DELETED ) == 0
 && ( b->GetFlags() & STRUCT_DELETED ) == 0 )
 {
 PCB_SHAPE* line_a = static_cast<PCB_SHAPE*>( a );
 PCB_SHAPE* line_b = static_cast<PCB_SHAPE*>( b );
 
 pairwise_line_routine->ProcessLinePair( *line_a, *line_b );
 }
 } );
 
 // Select added and modified items
 for( PCB_SHAPE* item : items_to_select_on_success )
 m_selectionTool->AddItemToSel( item, true );
 
 // Deselect removed items
 for( PCB_SHAPE* item : items_to_deselect_on_success )
 m_selectionTool->RemoveItemFromSel( item, true );
 
 if( any_items_removed )
 m_toolMgr->ProcessEvent( EVENTS::UnselectedEvent );
 
 if( any_items_created )
 m_toolMgr->ProcessEvent( EVENTS::SelectedEvent );
 
 // Notify other tools of the changes
 m_toolMgr->ProcessEvent( EVENTS::SelectedItemsModified );
 
 commit.Push( pairwise_line_routine->GetCommitDescription() );
 
 if( const std::optional<wxString> msg = pairwise_line_routine->GetStatusMessage() )
 frame()->ShowInfoBarMsg( *msg );
 
 return 0;
}
 
 
int EDIT_TOOL::SimplifyPolygons( const TOOL_EVENT& aEvent )
{
 PCB_SELECTION& selection = m_selectionTool->RequestSelection(
 []( const VECTOR2I& aPt, GENERAL_COLLECTOR& aCollector, PCB_SELECTION_TOOL* sTool )
 {
 std::vector<VECTOR2I> pts;
 
 // Iterate from the back so we don't have to worry about removals.
 for( int i = aCollector.GetCount() - 1; i >= 0; --i )
 {
 BOARD_ITEM* item = aCollector[i];
 
 if( !item->IsType( { PCB_SHAPE_LOCATE_POLY_T, PCB_ZONE_T } ) )
 aCollector.Remove( item );
 
 if( ZONE* zone = dyn_cast<ZONE*>( item ) )
 {
 if( zone->IsTeardropArea() )
 aCollector.Remove( item );
 }
 }
 },
 true /* prompt user regarding locked items */ );
 
 // Store last used value
 static int s_toleranceValue = pcbIUScale.mmToIU( 3 );
 
 WX_UNIT_ENTRY_DIALOG dlg( frame(), _( "Simplify Shapes" ), _( "Tolerance value:" ),
 s_toleranceValue );
 
 if( dlg.ShowModal() == wxID_CANCEL )
 return 0;
 
 s_toleranceValue = dlg.GetValue();
 
 if( s_toleranceValue <= 0 )
 return 0;
 
 BOARD_COMMIT commit{ this };
 
 std::vector<PCB_SHAPE*> shapeList;
 
 for( EDA_ITEM* item : selection )
 {
 commit.Modify( item );
 
 if( PCB_SHAPE* shape = dyn_cast<PCB_SHAPE*>( item ) )
 {
 SHAPE_POLY_SET& poly = shape->GetPolyShape();
 
 poly.SimplifyOutlines( s_toleranceValue );
 }
 
 if( ZONE* zone = dyn_cast<ZONE*>( item ) )
 {
 SHAPE_POLY_SET* poly = zone->Outline();
 
 poly->SimplifyOutlines( s_toleranceValue );
 }
 }
 
 commit.Push( _( "Simplify Polygons" ) );
 
 // Notify other tools of the changes
 m_toolMgr->ProcessEvent( EVENTS::SelectedItemsModified );
 
 return 0;
}
 
 
int EDIT_TOOL::HealShapes( const TOOL_EVENT& aEvent )
{
 PCB_SELECTION& selection = m_selectionTool->RequestSelection(
 []( const VECTOR2I& aPt, GENERAL_COLLECTOR& aCollector, PCB_SELECTION_TOOL* sTool )
 {
 std::vector<VECTOR2I> pts;
 
 // Iterate from the back so we don't have to worry about removals.
 for( int i = aCollector.GetCount() - 1; i >= 0; --i )
 {
 BOARD_ITEM* item = aCollector[i];
 
 // We've converted the polygon and rectangle to segments, so drop everything
 // that isn't a segment at this point
 if( !item->IsType( { PCB_SHAPE_LOCATE_SEGMENT_T, PCB_SHAPE_LOCATE_ARC_T,
 PCB_SHAPE_LOCATE_BEZIER_T } ) )
 {
 aCollector.Remove( item );
 }
 }
 },
 true /* prompt user regarding locked items */ );
 
 // Store last used value
 static int s_toleranceValue = pcbIUScale.mmToIU( 3 );
 
 WX_UNIT_ENTRY_DIALOG dlg( frame(), _( "Heal Shapes" ), _( "Tolerance value:" ),
 s_toleranceValue );
 
 if( dlg.ShowModal() == wxID_CANCEL )
 return 0;
 
 s_toleranceValue = dlg.GetValue();
 
 if( s_toleranceValue <= 0 )
 return 0;
 
 BOARD_COMMIT commit{ this };
 
 std::vector<PCB_SHAPE*> shapeList;
 std::vector<std::unique_ptr<PCB_SHAPE>> newShapes;
 
 for( EDA_ITEM* item : selection )
 {
 if( PCB_SHAPE* shape = dynamic_cast<PCB_SHAPE*>( item ) )
 {
 shapeList.push_back( shape );
 commit.Modify( shape );
 }
 }
 
 ConnectBoardShapes( shapeList, newShapes, s_toleranceValue );
 
 std::vector<PCB_SHAPE*> items_to_select;
 
 for( std::unique_ptr<PCB_SHAPE>& ptr : newShapes )
 {
 PCB_SHAPE* shape = ptr.release();
 
 commit.Add( shape );
 items_to_select.push_back( shape );
 }
 
 commit.Push( _( "Heal Shapes" ) );
 
 // Select added items
 for( PCB_SHAPE* item : items_to_select )
 m_selectionTool->AddItemToSel( item, true );
 
 if( items_to_select.size() > 0 )
 m_toolMgr->ProcessEvent( EVENTS::SelectedEvent );
 
 // Notify other tools of the changes
 m_toolMgr->ProcessEvent( EVENTS::SelectedItemsModified );
 
 return 0;
}
 
 
int EDIT_TOOL::BooleanPolygons( const TOOL_EVENT& aEvent )
{
 PCB_SELECTION& selection = m_selectionTool->RequestSelection(
 []( const VECTOR2I& aPt, GENERAL_COLLECTOR& aCollector, PCB_SELECTION_TOOL* sTool )
 {
 // Iterate from the back so we don't have to worry about removals.
 for( int i = aCollector.GetCount() - 1; i >= 0; --i )
 {
 BOARD_ITEM* item = aCollector[i];
 
 if( !item->IsType( {
 PCB_SHAPE_LOCATE_POLY_T,
 PCB_SHAPE_LOCATE_RECT_T,
 } ) )
 {
 aCollector.Remove( item );
 }
 }
 },
 true /* prompt user regarding locked items */ );
 
 const EDA_ITEM* const last_item = selection.GetLastAddedItem();
 
 // Gather or construct polygon source shapes to merge
 std::vector<PCB_SHAPE*> items_to_process;
 
 for( EDA_ITEM* item : selection )
 {
 items_to_process.push_back( static_cast<PCB_SHAPE*>( item ) );
 
 // put the last one in the selection at the front of the vector
 // so it can be used as the property donor and as the basis for the
 // boolean operation
 if( item == last_item )
 std::swap( items_to_process.back(), items_to_process.front() );
 }
 
 BOARD_COMMIT commit{ this };
 
 // Handle modifications to existing items by the routine
 auto item_modification_handler =
 [&]( PCB_SHAPE& aItem )
 {
 commit.Modify( &aItem );
 };
 
 std::vector<PCB_SHAPE*> items_to_select_on_success;
 
 auto item_creation_handler =
 [&]( std::unique_ptr<PCB_SHAPE> aItem )
 {
 items_to_select_on_success.push_back( aItem.get() );
 commit.Add( aItem.release() );
 };
 
 auto item_removal_handler =
 [&]( PCB_SHAPE& aItem )
 {
 commit.Remove( &aItem );
 };
 
 // Combine these callbacks into a CHANGE_HANDLER to inject in the ROUTINE
 ITEM_MODIFICATION_ROUTINE::CALLABLE_BASED_HANDLER change_handler(
 item_creation_handler, item_modification_handler, item_removal_handler );
 
 // Construct an appropriate routine
 std::unique_ptr<POLYGON_BOOLEAN_ROUTINE> boolean_routine;
 if( aEvent.IsAction( &PCB_ACTIONS::mergePolygons ) )
 {
 boolean_routine = std::make_unique<POLYGON_MERGE_ROUTINE>( frame()->GetModel(),
 change_handler );
 }
 else if( aEvent.IsAction( &PCB_ACTIONS::subtractPolygons ) )
 {
 boolean_routine = std::make_unique<POLYGON_SUBTRACT_ROUTINE>( frame()->GetModel(),
 change_handler );
 }
 else if( aEvent.IsAction( &PCB_ACTIONS::intersectPolygons ) )
 {
 boolean_routine = std::make_unique<POLYGON_INTERSECT_ROUTINE>( frame()->GetModel(),
 change_handler );
 }
 else
 {
 wxASSERT_MSG( false, "Could not find a polygon routine for this action" );
 return 0;
 }
 
 // Perform the operation on each polygon
 for( PCB_SHAPE* shape : items_to_process )
 boolean_routine->ProcessShape( *shape );
 
 // Select new items
 for( PCB_SHAPE* item : items_to_select_on_success )
 m_selectionTool->AddItemToSel( item, true );
 
 // Notify other tools of the changes
 m_toolMgr->ProcessEvent( EVENTS::SelectedItemsModified );
 
 commit.Push( boolean_routine->GetCommitDescription() );
 
 if( const std::optional<wxString> msg = boolean_routine->GetStatusMessage() )
 frame()->ShowInfoBarMsg( *msg );
 
 return 0;
}
 
 
int EDIT_TOOL::Properties( const TOOL_EVENT& aEvent )
{
 PCB_BASE_EDIT_FRAME* editFrame = getEditFrame<PCB_BASE_EDIT_FRAME>();
 const PCB_SELECTION& selection = m_selectionTool->RequestSelection(
 []( const VECTOR2I& aPt, GENERAL_COLLECTOR& aCollector, PCB_SELECTION_TOOL* sTool )
 {
 } );
 
 // Tracks & vias are treated in a special way:
 if( ( SELECTION_CONDITIONS::OnlyTypes( { PCB_TRACE_T, PCB_ARC_T, PCB_VIA_T } ) )( selection ) )
 {
 DIALOG_TRACK_VIA_PROPERTIES dlg( editFrame, selection );
 dlg.ShowQuasiModal(); // QuasiModal required for NET_SELECTOR
 }
 else if( ( SELECTION_CONDITIONS::OnlyTypes( { PCB_TABLECELL_T } ) )( selection ) )
 {
 std::vector<PCB_TABLECELL*> cells;
 
 for( EDA_ITEM* item : selection.Items() )
 cells.push_back( static_cast<PCB_TABLECELL*>( item ) );
 
 DIALOG_TABLECELL_PROPERTIES dlg( editFrame, cells );
 
 dlg.ShowModal();
 
 if( dlg.GetReturnValue() == DIALOG_TABLECELL_PROPERTIES::TABLECELL_PROPS_EDIT_TABLE )
 {
 PCB_TABLE* table = static_cast<PCB_TABLE*>( cells[0]->GetParent() );
 DIALOG_TABLE_PROPERTIES tableDlg( frame(), table );
 
 tableDlg.ShowQuasiModal(); // Scintilla's auto-complete requires quasiModal
 }
 }
 else if( selection.Size() == 1 )
 {
 // Display properties dialog
 if( BOARD_ITEM* item = dynamic_cast<BOARD_ITEM*>( selection.Front() ) )
 {
 // Do not handle undo buffer, it is done by the properties dialogs
 editFrame->OnEditItemRequest( item );
 
 // Notify other tools of the changes
 m_toolMgr->ProcessEvent( EVENTS::SelectedItemsModified );
 }
 }
 else if( selection.Size() == 0 && getView()->IsLayerVisible( LAYER_DRAWINGSHEET ) )
 {
 DS_PROXY_VIEW_ITEM* ds = editFrame->GetCanvas()->GetDrawingSheet();
 VECTOR2D cursorPos = getViewControls()->GetCursorPosition( false );
 
 if( ds && ds->HitTestDrawingSheetItems( getView(), cursorPos ) )
 m_toolMgr->PostAction( ACTIONS::pageSettings );
 else
 m_toolMgr->RunAction( PCB_ACTIONS::footprintProperties );
 }
 
 if( selection.IsHover() )
 {
 m_toolMgr->RunAction( PCB_ACTIONS::selectionClear );
 }
 else
 {
 // Check for items becoming invisible and drop them from the selection.
 
 PCB_SELECTION selCopy = selection;
 LSET visible = editFrame->GetBoard()->GetVisibleLayers();
 
 for( EDA_ITEM* eda_item : selCopy )
 {
 if( BOARD_ITEM* item = dynamic_cast<BOARD_ITEM*>( eda_item ) )
 {
 if( !( item->GetLayerSet() & visible ).any() )
 m_selectionTool->RemoveItemFromSel( item );
 }
 }
 }
 
 return 0;
}
 
 
int EDIT_TOOL::Rotate( const TOOL_EVENT& aEvent )
{
 if( isRouterActive() )
 {
 wxBell();
 return 0;
 }
 
 PCB_BASE_EDIT_FRAME* editFrame = getEditFrame<PCB_BASE_EDIT_FRAME>();
 BOARD_COMMIT localCommit( this );
 BOARD_COMMIT* commit = dynamic_cast<BOARD_COMMIT*>( aEvent.Commit() );
 
 if( !commit )
 commit = &localCommit;
 
 // Be sure that there is at least one item that we can modify. If nothing was selected before,
 // try looking for the stuff under mouse cursor (i.e. KiCad old-style hover selection)
 PCB_SELECTION& selection = m_selectionTool->RequestSelection(
 []( const VECTOR2I& aPt, GENERAL_COLLECTOR& aCollector, PCB_SELECTION_TOOL* sTool )
 {
 sTool->FilterCollectorForHierarchy( aCollector, true );
 sTool->FilterCollectorForMarkers( aCollector );
 sTool->FilterCollectorForTableCells( aCollector );
 },
 // Prompt user regarding locked items if in board editor and in free-pad-mode (if
 // we're not in free-pad mode we delay this until the second RequestSelection()).
 frame()->GetPcbNewSettings()->m_AllowFreePads && !m_isFootprintEditor );
 
 if( selection.Empty() )
 return 0;
 
 std::optional<VECTOR2I> oldRefPt;
 bool is_hover = selection.IsHover(); // N.B. This must be saved before the second
 // call to RequestSelection() below
 
 if( selection.HasReferencePoint() )
 oldRefPt = selection.GetReferencePoint();
 
 // Now filter out pads if not in free pads mode. We cannot do this in the first
 // RequestSelection() as we need the reference point when a pad is the selection front.
 if( !m_isFootprintEditor && !frame()->GetPcbNewSettings()->m_AllowFreePads )
 {
 selection = m_selectionTool->RequestSelection(
 []( const VECTOR2I& aPt, GENERAL_COLLECTOR& aCollector, PCB_SELECTION_TOOL* sTool )
 {
 sTool->FilterCollectorForMarkers( aCollector );
 sTool->FilterCollectorForHierarchy( aCollector, true );
 sTool->FilterCollectorForFreePads( aCollector );
 sTool->FilterCollectorForTableCells( aCollector );
 },
 true /* prompt user regarding locked items */ );
 }
 
 // Did we filter everything out? If so, don't try to operate further
 if( selection.Empty() )
 return 0;
 
 // A single textbox "walks" if we rotate it around its position, as we keep resetting which
 // corner is the origin.
 if( selection.Size() == 1 && dynamic_cast<PCB_TEXTBOX*>( selection.Front() ) )
 {
 selection.SetReferencePoint( static_cast<PCB_TEXTBOX*>( selection.Front() )->GetCenter() );
 }
 else
 {
 updateModificationPoint( selection );
 }
 
 VECTOR2I refPt = selection.GetReferencePoint();
 EDA_ANGLE rotateAngle = TOOL_EVT_UTILS::GetEventRotationAngle( *editFrame, aEvent );
 
 if( frame()->GetCanvas()->GetView()->GetGAL()->IsFlippedX() )
 rotateAngle = -rotateAngle;
 
 // Calculate view bounding box
 BOX2I viewBBox = selection.Front()->ViewBBox();
 
 for( EDA_ITEM* item : selection )
 viewBBox.Merge( item->ViewBBox() );
 
 // Check if the view bounding box will go out of bounds
 VECTOR2D rotPos = viewBBox.GetPosition();
 VECTOR2D rotEnd = viewBBox.GetEnd();
 
 RotatePoint( &rotPos.x, &rotPos.y, refPt.x, refPt.y, rotateAngle );
 RotatePoint( &rotEnd.x, &rotEnd.y, refPt.x, refPt.y, rotateAngle );
 
 typedef std::numeric_limits<int> coord_limits;
 
 int max = coord_limits::max() - COORDS_PADDING;
 int min = -max;
 
 bool outOfBounds = rotPos.x < min || rotPos.x > max || rotPos.y < min || rotPos.y > max
 || rotEnd.x < min || rotEnd.x > max || rotEnd.y < min || rotEnd.y > max;
 
 if( !outOfBounds )
 {
 for( EDA_ITEM* item : selection )
 {
 if( !item->IsNew() && !item->IsMoving() )
 commit->Modify( item );
 
 if( BOARD_ITEM* board_item = dynamic_cast<BOARD_ITEM*>( item ) )
 {
 board_item->Rotate( refPt, rotateAngle );
 board_item->Normalize();
 }
 }
 
 if( !localCommit.Empty() )
 localCommit.Push( _( "Rotate" ) );
 
 if( is_hover && !m_dragging )
 m_toolMgr->RunAction( PCB_ACTIONS::selectionClear );
 
 m_toolMgr->ProcessEvent( EVENTS::SelectedItemsModified );
 
 if( m_dragging )
 m_toolMgr->PostAction( PCB_ACTIONS::updateLocalRatsnest, VECTOR2I() );
 }
 
 // Restore the old reference so any mouse dragging that occurs doesn't make the selection jump
 // to this now invalid reference
 if( oldRefPt )
 selection.SetReferencePoint( *oldRefPt );
 else
 selection.ClearReferencePoint();
 
 return 0;
}
 
 
static VECTOR2I mirrorPointX( const VECTOR2I& aPoint, const VECTOR2I& aMirrorPoint )
{
 VECTOR2I mirrored = aPoint;
 
 mirrored.x -= aMirrorPoint.x;
 mirrored.x = -mirrored.x;
 mirrored.x += aMirrorPoint.x;
 
 return mirrored;
}
 
 
static VECTOR2I mirrorPointY( const VECTOR2I& aPoint, const VECTOR2I& aMirrorPoint )
{
 VECTOR2I mirrored = aPoint;
 
 mirrored.y -= aMirrorPoint.y;
 mirrored.y = -mirrored.y;
 mirrored.y += aMirrorPoint.y;
 
 return mirrored;
}
 
 
static void mirrorPadX( PAD& aPad, const VECTOR2I& aMirrorPoint )
{
 if( aPad.GetShape() == PAD_SHAPE::CUSTOM )
 aPad.FlipPrimitives( true ); // mirror primitives left to right
 
 VECTOR2I tmpPt = mirrorPointX( aPad.GetPosition(), aMirrorPoint );
 aPad.SetPosition( tmpPt );
 
 tmpPt = aPad.GetOffset();
 tmpPt.x = -tmpPt.x;
 aPad.SetOffset( tmpPt );
 
 auto tmpz = aPad.GetDelta();
 tmpz.x = -tmpz.x;
 aPad.SetDelta( tmpz );
 
 aPad.SetOrientation( -aPad.GetOrientation() );
}
 
 
static void mirrorPadY( PAD& aPad, const VECTOR2I& aMirrorPoint )
{
 if( aPad.GetShape() == PAD_SHAPE::CUSTOM )
 aPad.FlipPrimitives( false ); // mirror primitives top to bottom
 
 VECTOR2I tmpPt = mirrorPointY( aPad.GetPosition(), aMirrorPoint );
 aPad.SetPosition( tmpPt );
 
 tmpPt = aPad.GetOffset();
 tmpPt.y = -tmpPt.y;
 aPad.SetOffset( tmpPt );
 
 auto tmpz = aPad.GetDelta();
 tmpz.y = -tmpz.y;
 aPad.SetDelta( tmpz );
 
 aPad.SetOrientation( -aPad.GetOrientation() );
}
 
 
const std::vector<KICAD_T> EDIT_TOOL::MirrorableItems = {
 PCB_SHAPE_T,
 PCB_FIELD_T,
 PCB_TEXT_T,
 PCB_TEXTBOX_T,
 PCB_ZONE_T,
 PCB_PAD_T,
 PCB_TRACE_T,
 PCB_ARC_T,
 PCB_VIA_T,
};
 
int EDIT_TOOL::Mirror( const TOOL_EVENT& aEvent )
{
 if( isRouterActive() )
 {
 wxBell();
 return 0;
 }
 
 BOARD_COMMIT localCommit( this );
 BOARD_COMMIT* commit = dynamic_cast<BOARD_COMMIT*>( aEvent.Commit() );
 
 if( !commit )
 commit = &localCommit;
 
 PCB_SELECTION& selection = m_selectionTool->RequestSelection(
 []( const VECTOR2I& aPt, GENERAL_COLLECTOR& aCollector, PCB_SELECTION_TOOL* sTool )
 {
 sTool->FilterCollectorForMarkers( aCollector );
 sTool->FilterCollectorForHierarchy( aCollector, true );
 sTool->FilterCollectorForFreePads( aCollector );
 },
 !m_dragging /* prompt user regarding locked items */ );
 
 if( selection.Empty() )
 return 0;
 
 updateModificationPoint( selection );
 VECTOR2I mirrorPoint = selection.GetReferencePoint();
 
 // Set the mirroring options.
 // Unfortunately, the mirror function do not have the same parameter for all items
 // So we need these 2 parameters to avoid mistakes
 bool mirrorLeftRight = true;
 bool mirrorAroundXaxis = false;
 
 if( aEvent.IsAction( &PCB_ACTIONS::mirrorV ) )
 {
 mirrorLeftRight = false;
 mirrorAroundXaxis = true;
 }
 
 std::vector<EDA_ITEM*> items;
 
 for( EDA_ITEM* item : selection )
 {
 if( item->Type() == PCB_GROUP_T )
 {
 static_cast<PCB_GROUP*>( item )->RunOnDescendants(
 [&]( BOARD_ITEM* descendant )
 {
 items.push_back( descendant );
 } );
 }
 else
 {
 items.push_back( item );
 }
 }
 
 for( EDA_ITEM* item : items )
 {
 if( !item->IsType( MirrorableItems ) )
 continue;
 
 if( !item->IsNew() && !item->IsMoving() )
 commit->Modify( item );
 
 // modify each object as necessary
 switch( item->Type() )
 {
 case PCB_SHAPE_T:
 static_cast<PCB_SHAPE*>( item )->Mirror( mirrorPoint, mirrorAroundXaxis );
 break;
 
 case PCB_ZONE_T:
 static_cast<ZONE*>( item )->Mirror( mirrorPoint, mirrorLeftRight );
 break;
 
 case PCB_FIELD_T:
 case PCB_TEXT_T:
 static_cast<PCB_TEXT*>( item )->Mirror( mirrorPoint, mirrorAroundXaxis );
 break;
 
 case PCB_TEXTBOX_T:
 static_cast<PCB_TEXTBOX*>( item )->Mirror( mirrorPoint, mirrorAroundXaxis );
 break;
 
 case PCB_TABLE_T:
 // JEY TODO: tables
 break;
 
 case PCB_PAD_T:
 if( mirrorLeftRight )
 mirrorPadX( *static_cast<PAD*>( item ), mirrorPoint );
 else
 mirrorPadY( *static_cast<PAD*>( item ), mirrorPoint );
 
 break;
 
 case PCB_TRACE_T:
 case PCB_ARC_T:
 case PCB_VIA_T:
 static_cast<PCB_TRACK*>( item )->Mirror( mirrorPoint, mirrorAroundXaxis );
 break;
 
 default:
 // it's likely the commit object is wrong if you get here
 UNIMPLEMENTED_FOR( item->GetClass() );
 }
 }
 
 if( !localCommit.Empty() )
 localCommit.Push( _( "Mirror" ) );
 
 if( selection.IsHover() && !m_dragging )
 m_toolMgr->RunAction( PCB_ACTIONS::selectionClear );
 
 m_toolMgr->ProcessEvent( EVENTS::SelectedItemsModified );
 
 if( m_dragging )
 m_toolMgr->PostAction( PCB_ACTIONS::updateLocalRatsnest, VECTOR2I() );
 
 return 0;
}
 
 
int EDIT_TOOL::JustifyText( const TOOL_EVENT& aEvent )
{
 if( isRouterActive() )
 {
 wxBell();
 return 0;
 }
 
 BOARD_COMMIT localCommit( this );
 BOARD_COMMIT* commit = dynamic_cast<BOARD_COMMIT*>( aEvent.Commit() );
 
 if( !commit )
 commit = &localCommit;
 
 PCB_SELECTION& selection = m_selectionTool->RequestSelection(
 []( const VECTOR2I& aPt, GENERAL_COLLECTOR& aCollector, PCB_SELECTION_TOOL* sTool )
 {
 sTool->FilterCollectorForHierarchy( aCollector, true );
 },
 !m_dragging /* prompt user regarding locked items */ );
 
 if( selection.Empty() )
 return 0;
 
 auto setJustify =
 [&]( EDA_TEXT* aTextItem )
 {
 if( aEvent.Matches( ACTIONS::leftJustify.MakeEvent() ) )
 aTextItem->SetHorizJustify( GR_TEXT_H_ALIGN_LEFT );
 else if( aEvent.Matches( ACTIONS::centerJustify.MakeEvent() ) )
 aTextItem->SetHorizJustify( GR_TEXT_H_ALIGN_CENTER );
 else
 aTextItem->SetHorizJustify( GR_TEXT_H_ALIGN_RIGHT );
 };
 
 for( EDA_ITEM* item : selection )
 {
 if( item->Type() == PCB_FIELD_T || item->Type() == PCB_TEXT_T )
 {
 if( !item->IsNew() && !item->IsMoving() )
 commit->Modify( item );
 
 setJustify( static_cast<PCB_TEXT*>( item ) );
 }
 else if( item->Type() == PCB_TEXTBOX_T )
 {
 if( !item->IsNew() && !item->IsMoving() )
 commit->Modify( item );
 
 setJustify( static_cast<PCB_TEXTBOX*>( item ) );
 }
 }
 
 if( !localCommit.Empty() )
 {
 if( aEvent.Matches( ACTIONS::leftJustify.MakeEvent() ) )
 localCommit.Push( _( "Left Justify" ) );
 else if( aEvent.Matches( ACTIONS::centerJustify.MakeEvent() ) )
 localCommit.Push( _( "Center Justify" ) );
 else
 localCommit.Push( _( "Right Justify" ) );
 }
 
 if( selection.IsHover() && !m_dragging )
 m_toolMgr->RunAction( PCB_ACTIONS::selectionClear );
 
 m_toolMgr->ProcessEvent( EVENTS::SelectedItemsModified );
 
 if( m_dragging )
 m_toolMgr->PostAction( PCB_ACTIONS::updateLocalRatsnest, VECTOR2I() );
 
 return 0;
}
 
 
int EDIT_TOOL::Flip( const TOOL_EVENT& aEvent )
{
 if( isRouterActive() )
 {
 wxBell();
 return 0;
 }
 
 BOARD_COMMIT localCommit( this );
 BOARD_COMMIT* commit = dynamic_cast<BOARD_COMMIT*>( aEvent.Commit() );
 
 if( !commit )
 commit = &localCommit;
 
 PCB_SELECTION& selection = m_selectionTool->RequestSelection(
 []( const VECTOR2I& aPt, GENERAL_COLLECTOR& aCollector, PCB_SELECTION_TOOL* sTool )
 {
 sTool->FilterCollectorForMarkers( aCollector );
 sTool->FilterCollectorForHierarchy( aCollector, true );
 sTool->FilterCollectorForFreePads( aCollector );
 sTool->FilterCollectorForTableCells( aCollector );
 },
 !m_dragging /* prompt user regarding locked items */ );
 
 if( selection.Empty() )
 return 0;
 
 std::optional<VECTOR2I> oldRefPt;
 
 if( selection.HasReferencePoint() )
 oldRefPt = selection.GetReferencePoint();
 
 updateModificationPoint( selection );
 
 // Flip around the anchor for footprints, and the bounding box center for board items
 VECTOR2I refPt = IsFootprintEditor() ? VECTOR2I( 0, 0 ) : selection.GetCenter();
 
 // If only one item selected, flip around the selection or item anchor point (instead
 // of the bounding box center) to avoid moving the item anchor
 if( selection.GetSize() == 1 )
 refPt = selection.GetReferencePoint();
 
 bool leftRight = frame()->GetPcbNewSettings()->m_FlipLeftRight;
 
 for( EDA_ITEM* item : selection )
 {
 if( BOARD_ITEM* boardItem = dynamic_cast<BOARD_ITEM*>( item ) )
 {
 if( !boardItem->IsNew() && !boardItem->IsMoving() )
 commit->Modify( boardItem );
 
 boardItem->Flip( refPt, leftRight );
 boardItem->Normalize();
 }
 }
 
 if( !localCommit.Empty() )
 localCommit.Push( _( "Change Side / Flip" ) );
 
 if( selection.IsHover() && !m_dragging )
 m_toolMgr->RunAction( PCB_ACTIONS::selectionClear );
 
 m_toolMgr->ProcessEvent( EVENTS::SelectedItemsModified );
 
 if( m_dragging )
 m_toolMgr->PostAction( PCB_ACTIONS::updateLocalRatsnest, VECTOR2I() );
 
 // Restore the old reference so any mouse dragging that occurs doesn't make the selection jump
 // to this now invalid reference
 if( oldRefPt )
 selection.SetReferencePoint( *oldRefPt );
 else
 selection.ClearReferencePoint();
 
 return 0;
}
 
 
void EDIT_TOOL::getChildItemsOfGroupsAndGenerators( EDA_ITEM* item,
 std::unordered_set<BOARD_ITEM*>& children )
{
 wxASSERT( item->Type() == PCB_GROUP_T || item->Type() == PCB_GENERATOR_T );
 
 std::unordered_set<BOARD_ITEM*>& childItems = static_cast<PCB_GROUP*>( item )->GetItems();
 
 for( BOARD_ITEM* childItem : childItems )
 {
 children.insert( childItem );
 
 if( childItem->Type() == PCB_GROUP_T || childItem->Type() == PCB_GENERATOR_T )
 getChildItemsOfGroupsAndGenerators( childItem, children );
 }
}
 
 
void EDIT_TOOL::removeNonRootItems( std::unordered_set<EDA_ITEM*>& items )
{
 auto itr = items.begin();
 
 while( itr != items.end() )
 {
 BOARD_ITEM* curItem = dynamic_cast<BOARD_ITEM*>( *itr );
 
 if( curItem )
 {
 if( curItem->Type() == PCB_GROUP_T || curItem->Type() == PCB_GENERATOR_T )
 {
 std::unordered_set<BOARD_ITEM*> childItems;
 getChildItemsOfGroupsAndGenerators( curItem, childItems );
 
 std::for_each( childItems.begin(), childItems.end(),
 [&]( auto eraseItem )
 {
 items.erase( eraseItem );
 } );
 }
 }
 
 ++itr;
 }
}
 
 
void EDIT_TOOL::DeleteItems( const PCB_SELECTION& aItems, bool aIsCut )
{
 PCB_BASE_EDIT_FRAME* editFrame = getEditFrame<PCB_BASE_EDIT_FRAME>();
 BOARD_COMMIT commit( this );
 
 // As we are about to remove items, they have to be removed from the selection first
 m_toolMgr->RunAction( PCB_ACTIONS::selectionClear );
 
 // Only delete items that are the root of a selected set (e.g. only delete grouped / generated
 // items from the parent item, not individually) - issue #17527
 std::unordered_set<EDA_ITEM*> rootItems( aItems.begin(), aItems.end() );
 removeNonRootItems( rootItems );
 
 int itemsDeleted = 0;
 int fieldsHidden = 0;
 int fieldsAlreadyHidden = 0;
 
 for( EDA_ITEM* item : rootItems )
 {
 BOARD_ITEM* board_item = dynamic_cast<BOARD_ITEM*>( item );
 wxCHECK2( board_item, continue );
 
 FOOTPRINT* parentFP = board_item->GetParentFootprint();
 
 if( board_item->GetParentGroup() )
 commit.Stage( board_item, CHT_UNGROUP );
 
 switch( item->Type() )
 {
 case PCB_FIELD_T:
 {
 PCB_FIELD* field = static_cast<PCB_FIELD*>( board_item );
 
 wxASSERT( parentFP );
 commit.Modify( parentFP );
 
 if( field->IsVisible() )
 {
 field->SetVisible( false );
 fieldsHidden++;
 }
 else
 {
 fieldsAlreadyHidden++;
 }
 
 getView()->Update( parentFP );
 break;
 }
 
 case PCB_TEXT_T:
 if( parentFP )
 {
 commit.Modify( parentFP );
 parentFP->Delete( board_item );
 getView()->Update( parentFP );
 }
 else
 {
 commit.Remove( board_item );
 }
 
 itemsDeleted++;
 break;
 
 case PCB_SHAPE_T:
 case PCB_TEXTBOX_T:
 case PCB_TABLE_T:
 case PCB_REFERENCE_IMAGE_T:
 case PCB_DIMENSION_T:
 case PCB_DIM_ALIGNED_T:
 case PCB_DIM_LEADER_T:
 case PCB_DIM_CENTER_T:
 case PCB_DIM_RADIAL_T:
 case PCB_DIM_ORTHOGONAL_T:
 commit.Remove( board_item );
 itemsDeleted++;
 break;
 
 case PCB_TABLECELL_T:
 // Clear contents of table cell
 commit.Modify( board_item );
 static_cast<PCB_TABLECELL*>( board_item )->SetText( wxEmptyString );
 itemsDeleted++;
 break;
 
 case PCB_GROUP_T:
 board_item->RunOnDescendants(
 [&commit]( BOARD_ITEM* aItem )
 {
 commit.Stage( aItem, CHT_UNGROUP );
 } );
 
 board_item->RunOnDescendants(
 [&commit]( BOARD_ITEM* aItem )
 {
 commit.Remove( aItem );
 } );
 
 commit.Remove( board_item );
 itemsDeleted++;
 break;
 
 case PCB_PAD_T:
 if( IsFootprintEditor() || frame()->GetPcbNewSettings()->m_AllowFreePads )
 {
 commit.Modify( parentFP );
 getView()->Remove( board_item );
 parentFP->Remove( board_item );
 itemsDeleted++;
 }
 
 break;
 
 case PCB_ZONE_T:
 // We process the zones special so that cutouts can be deleted when the delete
 // tool is called from inside a cutout when the zone is selected.
 // Only interact with cutouts when deleting and a single item is selected
 if( !aIsCut && aItems.GetSize() == 1 )
 {
 VECTOR2I curPos = getViewControls()->GetCursorPosition();
 ZONE* zone = static_cast<ZONE*>( board_item );
 
 int outlineIdx, holeIdx;
 
 if( zone->HitTestCutout( curPos, &outlineIdx, &holeIdx ) )
 {
 // Remove the cutout
 commit.Modify( zone );
 zone->RemoveCutout( outlineIdx, holeIdx );
 zone->UnFill();
 
 // TODO Refill zone when KiCad supports auto re-fill
 
 // Update the display
 zone->HatchBorder();
 canvas()->Refresh();
 
 // Restore the selection on the original zone
 m_toolMgr->RunAction<EDA_ITEM*>( PCB_ACTIONS::selectItem, zone );
 
 break;
 }
 }
 
 // Remove the entire zone otherwise
 commit.Remove( board_item );
 itemsDeleted++;
 break;
 
 case PCB_GENERATOR_T:
 if( rootItems.size() == 1 )
 {
 PCB_GENERATOR* generator = static_cast<PCB_GENERATOR*>( board_item );
 
 m_toolMgr->RunSynchronousAction<PCB_GENERATOR*>( PCB_ACTIONS::genRemove, &commit,
 generator );
 }
 else
 {
 PCB_GENERATOR* generator = static_cast<PCB_GENERATOR*>( board_item );
 
 for( BOARD_ITEM* member : generator->GetItems() )
 commit.Stage( member, CHT_UNGROUP );
 
 for( BOARD_ITEM* member : generator->GetItems() )
 commit.Remove( member );
 
 commit.Remove( board_item );
 }
 
 itemsDeleted++;
 break;
 
 default:
 wxASSERT_MSG( parentFP == nullptr, wxT( "Try to delete an item living in a footprint" ) );
 commit.Remove( board_item );
 itemsDeleted++;
 break;
 }
 }
 
 // If the entered group has been emptied then leave it.
 PCB_GROUP* enteredGroup = m_selectionTool->GetEnteredGroup();
 
 if( enteredGroup && enteredGroup->GetItems().empty() )
 m_selectionTool->ExitGroup();
 
 if( aIsCut )
 {
 commit.Push( _( "Cut" ) );
 }
 else if( itemsDeleted == 0 )
 {
 if( fieldsHidden == 1 )
 commit.Push( _( "Hide Field" ) );
 else if( fieldsHidden > 1 )
 commit.Push( _( "Hide Fields" ) );
 else if( fieldsAlreadyHidden > 0 )
 editFrame->ShowInfoBarError( _( "Use the Footprint Properties dialog to remove fields." ) );
 }
 else
 {
 commit.Push( _( "Delete" ) );
 }
}
 
 
int EDIT_TOOL::Remove( const TOOL_EVENT& aEvent )
{
 PCB_BASE_EDIT_FRAME* editFrame = getEditFrame<PCB_BASE_EDIT_FRAME>();
 
 editFrame->PushTool( aEvent );
 
 std::vector<BOARD_ITEM*> lockedItems;
 Activate();
 
 // get a copy instead of reference (as we're going to clear the selection before removing items)
 PCB_SELECTION selectionCopy;
 bool isCut = aEvent.Parameter<PCB_ACTIONS::REMOVE_FLAGS>() == PCB_ACTIONS::REMOVE_FLAGS::CUT;
 bool isAlt = aEvent.Parameter<PCB_ACTIONS::REMOVE_FLAGS>() == PCB_ACTIONS::REMOVE_FLAGS::ALT;
 
 // If we are in a "Cut" operation, then the copied selection exists already and we want to
 // delete exactly that; no more, no fewer. Any filtering for locked items must be done in
 // the copyToClipboard() routine.
 if( isCut )
 {
 selectionCopy = m_selectionTool->GetSelection();
 }
 else
 {
 // When not in free-pad mode we normally auto-promote selected pads to their parent
 // footprints. But this is probably a little too dangerous for a destructive operation,
 // so we just do the promotion but not the deletion (allowing for a second delete to do
 // it if that's what the user wanted).
 selectionCopy = m_selectionTool->RequestSelection(
 []( const VECTOR2I& aPt, GENERAL_COLLECTOR& aCollector, PCB_SELECTION_TOOL* sTool )
 {
 } );
 
 size_t beforeFPCount = selectionCopy.CountType( PCB_FOOTPRINT_T );
 
 m_selectionTool->RequestSelection(
 []( const VECTOR2I& aPt, GENERAL_COLLECTOR& aCollector, PCB_SELECTION_TOOL* sTool )
 {
 sTool->FilterCollectorForFreePads( aCollector );
 } );
 
 if( !selectionCopy.IsHover()
 && m_selectionTool->GetSelection().CountType( PCB_FOOTPRINT_T ) > beforeFPCount )
 {
 wxBell();
 canvas()->Refresh();
 editFrame->PopTool( aEvent );
 return 0;
 }
 
 // In "alternative" mode, we expand selected track items to their full connection.
 if( isAlt && ( selectionCopy.HasType( PCB_TRACE_T ) || selectionCopy.HasType( PCB_VIA_T ) ) )
 {
 m_toolMgr->RunAction( PCB_ACTIONS::selectConnection );
 }
 
 // Finally run RequestSelection() one more time to find out what user wants to do about
 // locked objects.
 selectionCopy = m_selectionTool->RequestSelection(
 []( const VECTOR2I& aPt, GENERAL_COLLECTOR& aCollector, PCB_SELECTION_TOOL* sTool )
 {
 sTool->FilterCollectorForFreePads( aCollector );
 },
 true /* prompt user regarding locked items */ );
 }
 
 DeleteItems( selectionCopy, isCut );
 canvas()->Refresh();
 
 editFrame->PopTool( aEvent );
 return 0;
}
 
 
int EDIT_TOOL::MoveExact( const TOOL_EVENT& aEvent )
{
 if( isRouterActive() )
 {
 wxBell();
 return 0;
 }
 
 const PCB_SELECTION& selection = m_selectionTool->RequestSelection(
 []( const VECTOR2I& aPt, GENERAL_COLLECTOR& aCollector, PCB_SELECTION_TOOL* sTool )
 {
 sTool->FilterCollectorForMarkers( aCollector );
 sTool->FilterCollectorForHierarchy( aCollector, true );
 sTool->FilterCollectorForTableCells( aCollector );
 },
 true /* prompt user regarding locked items */ );
 
 if( selection.Empty() )
 return 0;
 
 VECTOR2I translation;
 EDA_ANGLE rotation;
 ROTATION_ANCHOR rotationAnchor = selection.Size() > 1 ? ROTATE_AROUND_SEL_CENTER
 : ROTATE_AROUND_ITEM_ANCHOR;
 
 // TODO: Implement a visible bounding border at the edge
 BOX2I sel_box = selection.GetBoundingBox();
 
 DIALOG_MOVE_EXACT dialog( frame(), translation, rotation, rotationAnchor, sel_box );
 int ret = dialog.ShowModal();
 
 if( ret == wxID_OK )
 {
 BOARD_COMMIT commit( this );
 EDA_ANGLE angle = rotation;
 VECTOR2I rp = selection.GetCenter();
 VECTOR2I selCenter( rp.x, rp.y );
 
 // Make sure the rotation is from the right reference point
 selCenter += translation;
 
 if( !frame()->GetPcbNewSettings()->m_Display.m_DisplayInvertYAxis )
 rotation = -rotation;
 
 for( EDA_ITEM* item : selection )
 {
 BOARD_ITEM* boardItem = dynamic_cast<BOARD_ITEM*>( item );
 
 wxCHECK2( boardItem, continue );
 
 if( !boardItem->IsNew() )
 commit.Modify( boardItem );
 
 if( !boardItem->GetParent() || !boardItem->GetParent()->IsSelected() )
 boardItem->Move( translation );
 
 switch( rotationAnchor )
 {
 case ROTATE_AROUND_ITEM_ANCHOR:
 boardItem->Rotate( boardItem->GetPosition(), angle );
 break;
 case ROTATE_AROUND_SEL_CENTER:
 boardItem->Rotate( selCenter, angle );
 break;
 case ROTATE_AROUND_USER_ORIGIN:
 boardItem->Rotate( frame()->GetScreen()->m_LocalOrigin, angle );
 break;
 case ROTATE_AROUND_AUX_ORIGIN:
 boardItem->Rotate( board()->GetDesignSettings().GetAuxOrigin(), angle );
 break;
 }
 
 if( !m_dragging )
 getView()->Update( boardItem );
 }
 
 commit.Push( _( "Move Exactly" ) );
 
 if( selection.IsHover() )
 m_toolMgr->RunAction( PCB_ACTIONS::selectionClear );
 
 m_toolMgr->ProcessEvent( EVENTS::SelectedItemsModified );
 
 if( m_dragging )
 m_toolMgr->PostAction( PCB_ACTIONS::updateLocalRatsnest, VECTOR2I() );
 }
 
 return 0;
}
 
 
int EDIT_TOOL::Duplicate( const TOOL_EVENT& aEvent )
{
 if( isRouterActive() )
 {
 wxBell();
 return 0;
 }
 
 bool increment = aEvent.IsAction( &PCB_ACTIONS::duplicateIncrement );
 
 // Be sure that there is at least one item that we can modify
 const PCB_SELECTION& selection = m_selectionTool->RequestSelection(
 []( const VECTOR2I&, GENERAL_COLLECTOR& aCollector, PCB_SELECTION_TOOL* sTool )
 {
 sTool->FilterCollectorForFreePads( aCollector, true );
 sTool->FilterCollectorForMarkers( aCollector );
 sTool->FilterCollectorForHierarchy( aCollector, true );
 sTool->FilterCollectorForTableCells( aCollector );
 } );
 
 if( selection.Empty() )
 return 0;
 
 // Duplicating tuhing patterns alone is not supported
 if( selection.Size() == 1 && selection.CountType( PCB_GENERATOR_T ) )
 return 0;
 
 // we have a selection to work on now, so start the tool process
 PCB_BASE_EDIT_FRAME* editFrame = getEditFrame<PCB_BASE_EDIT_FRAME>();
 BOARD_COMMIT commit( this );
 
 // If the selection was given a hover, we do not keep the selection after completion
 bool is_hover = selection.IsHover();
 
 std::vector<BOARD_ITEM*> new_items;
 new_items.reserve( selection.Size() );
 
 // Each selected item is duplicated and pushed to new_items list
 // Old selection is cleared, and new items are then selected.
 for( EDA_ITEM* item : selection )
 {
 BOARD_ITEM* dupe_item = nullptr;
 BOARD_ITEM* orig_item = dynamic_cast<BOARD_ITEM*>( item );
 
 wxCHECK2( orig_item, continue );
 
 if( m_isFootprintEditor )
 {
 FOOTPRINT* parentFootprint = editFrame->GetBoard()->GetFirstFootprint();
 
 // PCB_FIELD items are specific items (not only graphic, but are properies )
 // and cannot be duplicated like other footprint items. So skip it:
 if( orig_item->Type() == PCB_FIELD_T )
 {
 orig_item->ClearSelected();
 continue;
 }
 
 dupe_item = parentFootprint->DuplicateItem( orig_item );
 
 if( increment && dupe_item->Type() == PCB_PAD_T
 && static_cast<PAD*>( dupe_item )->CanHaveNumber() )
 {
 PAD_TOOL* padTool = m_toolMgr->GetTool<PAD_TOOL>();
 wxString padNumber = padTool->GetLastPadNumber();
 padNumber = parentFootprint->GetNextPadNumber( padNumber );
 padTool->SetLastPadNumber( padNumber );
 static_cast<PAD*>( dupe_item )->SetNumber( padNumber );
 }
 
 dupe_item->ClearSelected();
 new_items.push_back( dupe_item );
 commit.Add( dupe_item );
 }
 else if( /*FOOTPRINT* parentFootprint =*/ orig_item->GetParentFootprint() )
 {
 // No sub-footprint modifications allowed outside of footprint editor
 // and parentFootprint is not (yet?) used
 }
 else
 {
 switch( orig_item->Type() )
 {
 case PCB_FOOTPRINT_T:
 case PCB_TEXT_T:
 case PCB_TEXTBOX_T:
 case PCB_REFERENCE_IMAGE_T:
 case PCB_SHAPE_T:
 case PCB_TRACE_T:
 case PCB_ARC_T:
 case PCB_VIA_T:
 case PCB_ZONE_T:
 case PCB_TARGET_T:
 case PCB_DIM_ALIGNED_T:
 case PCB_DIM_CENTER_T:
 case PCB_DIM_RADIAL_T:
 case PCB_DIM_ORTHOGONAL_T:
 case PCB_DIM_LEADER_T:
 dupe_item = orig_item->Duplicate();
 
 // Clear the selection flag here, otherwise the PCB_SELECTION_TOOL
 // will not properly select it later on
 dupe_item->ClearSelected();
 
 new_items.push_back( dupe_item );
 commit.Add( dupe_item );
 break;
 
 case PCB_TABLE_T:
 // JEY TODO: tables
 break;
 
 case PCB_GENERATOR_T:
 case PCB_GROUP_T:
 dupe_item = static_cast<PCB_GROUP*>( orig_item )->DeepDuplicate();
 
 dupe_item->RunOnDescendants(
 [&]( BOARD_ITEM* aItem )
 {
 aItem->ClearSelected();
 new_items.push_back( aItem );
 commit.Add( aItem );
 } );
 
 dupe_item->ClearSelected();
 new_items.push_back( dupe_item );
 commit.Add( dupe_item );
 break;
 
 default:
 wxASSERT_MSG( false, wxString::Format( wxT( "Unhandled item type %d" ),
 orig_item->Type() ) );
 break;
 }
 }
 }
 
 // Clear the old selection first
 m_toolMgr->RunAction( PCB_ACTIONS::selectionClear );
 
 // Select the new items
 EDA_ITEMS nItems( new_items.begin(), new_items.end() );
 m_toolMgr->RunAction<EDA_ITEMS*>( PCB_ACTIONS::selectItems, &nItems );
 
 // record the new items as added
 if( !selection.Empty() )
 {
 editFrame->DisplayToolMsg( wxString::Format( _( "Duplicated %d item(s)" ),
 (int) new_items.size() ) );
 
 // If items were duplicated, pick them up
 if( doMoveSelection( aEvent, &commit, true ) )
 commit.Push( _( "Duplicate" ) );
 else
 commit.Revert();
 
 // Deselect the duplicated item if we originally started as a hover selection
 if( is_hover )
 m_toolMgr->RunAction( PCB_ACTIONS::selectionClear );
 }
 
 return 0;
}
 
 
int EDIT_TOOL::CreateArray( const TOOL_EVENT& aEvent )
{
 if( isRouterActive() )
 {
 wxBell();
 return 0;
 }
 
 // Be sure that there is at least one item that we can modify
 const PCB_SELECTION& selection = m_selectionTool->RequestSelection(
 []( const VECTOR2I&, GENERAL_COLLECTOR& aCollector, PCB_SELECTION_TOOL* sTool )
 {
 sTool->FilterCollectorForMarkers( aCollector );
 sTool->FilterCollectorForHierarchy( aCollector, true );
 } );
 
 if( selection.Empty() )
 return 0;
 
 // we have a selection to work on now, so start the tool process
 PCB_BASE_FRAME* editFrame = getEditFrame<PCB_BASE_FRAME>();
 ARRAY_CREATOR array_creator( *editFrame, m_isFootprintEditor, selection, m_toolMgr );
 array_creator.Invoke();
 
 return 0;
}
 
 
void EDIT_TOOL::PadFilter( const VECTOR2I&, GENERAL_COLLECTOR& aCollector,
 PCB_SELECTION_TOOL* sTool )
{
 for( int i = aCollector.GetCount() - 1; i >= 0; i-- )
 {
 if( aCollector[i]->Type() != PCB_PAD_T )
 aCollector.Remove( i );
 }
}
 
 
void EDIT_TOOL::FootprintFilter( const VECTOR2I&, GENERAL_COLLECTOR& aCollector,
 PCB_SELECTION_TOOL* sTool )
{
 for( int i = aCollector.GetCount() - 1; i >= 0; i-- )
 {
 if( aCollector[i]->Type() != PCB_FOOTPRINT_T )
 aCollector.Remove( i );
 }
}
 
 
bool EDIT_TOOL::updateModificationPoint( PCB_SELECTION& aSelection )
{
 // Can't modify an empty group
 if( aSelection.Empty() )
 return false;
 
 if( ( m_dragging || aSelection[0]->IsMoving() ) && aSelection.HasReferencePoint() )
 return false;
 
 // When there is only one item selected, the reference point is its position...
 if( aSelection.Size() == 1 && aSelection.Front()->Type() != PCB_TABLE_T )
 {
 if( BOARD_ITEM* item = dynamic_cast<BOARD_ITEM*>( aSelection.Front() ) )
 aSelection.SetReferencePoint( item->GetPosition() );
 }
 // ...otherwise modify items with regard to the grid-snapped center position
 else
 {
 PCB_GRID_HELPER grid( m_toolMgr, frame()->GetMagneticItemsSettings() );
 VECTOR2I refPt = aSelection.GetCenter();
 
 // Exclude text in the footprint editor if there's anything else selected
 if( m_isFootprintEditor )
 {
 BOX2I nonFieldsBBox;
 
 for( EDA_ITEM* item : aSelection.Items() )
 {
 if( !item->IsType( { PCB_TEXT_T, PCB_FIELD_T } ) )
 nonFieldsBBox.Merge( item->GetBoundingBox() );
 }
 
 if( nonFieldsBBox.IsValid() )
 refPt = nonFieldsBBox.GetCenter();
 }
 
 aSelection.SetReferencePoint( grid.BestSnapAnchor( refPt, nullptr ) );
 }
 
 return true;
}
 
 
bool EDIT_TOOL::pickReferencePoint( const wxString& aTooltip, const wxString& aSuccessMessage,
 const wxString& aCanceledMessage, VECTOR2I& aReferencePoint )
{
 PCB_PICKER_TOOL* picker = m_toolMgr->GetTool<PCB_PICKER_TOOL>();
 std::optional<VECTOR2I> pickedPoint;
 bool done = false;
 
 m_statusPopup->SetText( aTooltip );
 
 picker->SetSnapping( true );
 
 picker->SetClickHandler(
 [&]( const VECTOR2D& aPoint ) -> bool
 {
 pickedPoint = aPoint;
 
 if( !aSuccessMessage.empty() )
 {
 m_statusPopup->SetText( aSuccessMessage );
 m_statusPopup->Expire( 800 );
 }
 else
 {
 m_statusPopup->Hide();
 }
 
 return false; // we don't need any more points
 } );
 
 picker->SetMotionHandler(
 [&]( const VECTOR2D& aPos )
 {
 m_statusPopup->Move( KIPLATFORM::UI::GetMousePosition() + wxPoint( 20, -50 ) );
 } );
 
 picker->SetCancelHandler(
 [&]()
 {
 if( !aCanceledMessage.empty() )
 {
 m_statusPopup->SetText( aCanceledMessage );
 m_statusPopup->Expire( 800 );
 }
 else
 {
 m_statusPopup->Hide();
 }
 } );
 
 picker->SetFinalizeHandler(
 [&]( const int& aFinalState )
 {
 done = true;
 } );
 
 m_statusPopup->Move( KIPLATFORM::UI::GetMousePosition() + wxPoint( 20, -50 ) );
 m_statusPopup->Popup();
 canvas()->SetStatusPopup( m_statusPopup->GetPanel() );
 
 m_toolMgr->RunAction( ACTIONS::pickerSubTool );
 
 while( !done )
 {
 // Pass events unless we receive a null event, then we must shut down
 if( TOOL_EVENT* evt = Wait() )
 evt->SetPassEvent();
 else
 break;
 }
 
 // Ensure statusPopup is hidden after use and before deleting it:
 canvas()->SetStatusPopup( nullptr );
 m_statusPopup->Hide();
 
 if( pickedPoint )
 aReferencePoint = *pickedPoint;
 
 return pickedPoint.has_value();
}
 
 
int EDIT_TOOL::copyToClipboard( const TOOL_EVENT& aEvent )
{
 CLIPBOARD_IO io;
 PCB_GRID_HELPER grid( m_toolMgr,
 getEditFrame<PCB_BASE_EDIT_FRAME>()->GetMagneticItemsSettings() );
 TOOL_EVENT selectReferencePoint( aEvent.Category(), aEvent.Action(),
 "pcbnew.InteractiveEdit.selectReferencePoint",
 TOOL_ACTION_SCOPE::AS_GLOBAL );
 
 frame()->PushTool( selectReferencePoint );
 Activate();
 
 PCB_SELECTION& selection = m_selectionTool->RequestSelection(
 []( const VECTOR2I& aPt, GENERAL_COLLECTOR& aCollector, PCB_SELECTION_TOOL* sTool )
 {
 for( int i = aCollector.GetCount() - 1; i >= 0; --i )
 {
 BOARD_ITEM* item = aCollector[i];
 
 // We can't copy both a footprint and its text in the same operation, so if
 // both are selected, remove the text
 if( ( item->Type() == PCB_FIELD_T || item->Type() == PCB_TEXT_T )
 && aCollector.HasItem( item->GetParentFootprint() ) )
 {
 aCollector.Remove( item );
 }
 else if( item->Type() == PCB_MARKER_T )
 {
 // Don't allow copying marker objects
 aCollector.Remove( item );
 }
 }
 },
 
 // Prompt user regarding locked items.
 aEvent.IsAction( &ACTIONS::cut ) && !m_isFootprintEditor );
 
 if( !selection.Empty() )
 {
 std::vector<BOARD_ITEM*> items;
 
 for( EDA_ITEM* item : selection )
 {
 if( BOARD_ITEM* boardItem = dynamic_cast<BOARD_ITEM*>( item ) )
 items.push_back( boardItem );
 }
 
 VECTOR2I refPoint;
 
 if( aEvent.IsAction( &PCB_ACTIONS::copyWithReference ) )
 {
 if( !pickReferencePoint( _( "Select reference point for the copy..." ),
 _( "Selection copied" ),
 _( "Copy canceled" ),
 refPoint ) )
 {
 frame()->PopTool( selectReferencePoint );
 return 0;
 }
 }
 else
 {
 refPoint = grid.BestDragOrigin( getViewControls()->GetCursorPosition(), items );
 }
 
 selection.SetReferencePoint( refPoint );
 
 io.SetBoard( board() );
 io.SaveSelection( selection, m_isFootprintEditor );
 frame()->SetStatusText( _( "Selection copied" ) );
 }
 
 frame()->PopTool( selectReferencePoint );
 
 if( selection.IsHover() )
 m_selectionTool->ClearSelection();
 
 return 0;
}
 
 
int EDIT_TOOL::cutToClipboard( const TOOL_EVENT& aEvent )
{
 if( !copyToClipboard( aEvent ) )
 {
 // N.B. Setting the CUT flag prevents lock filtering as we only want to delete the items
 // that were copied to the clipboard, no more, no fewer. Filtering for locked item, if
 // any will be done in the copyToClipboard() routine
 TOOL_EVENT evt = aEvent;
 evt.SetParameter( PCB_ACTIONS::REMOVE_FLAGS::CUT );
 Remove( evt );
 }
 
 return 0;
}
 
 
void EDIT_TOOL::rebuildConnectivity()
{
 board()->BuildConnectivity();
 m_toolMgr->PostEvent( EVENTS::ConnectivityChangedEvent );
 canvas()->RedrawRatsnest();
}
 
 
void EDIT_TOOL::setTransitions()
{
 Go( &EDIT_TOOL::GetAndPlace, PCB_ACTIONS::getAndPlace.MakeEvent() );
 Go( &EDIT_TOOL::Move, PCB_ACTIONS::move.MakeEvent() );
 Go( &EDIT_TOOL::Move, PCB_ACTIONS::moveIndividually.MakeEvent() );
 Go( &EDIT_TOOL::Drag, PCB_ACTIONS::drag45Degree.MakeEvent() );
 Go( &EDIT_TOOL::Drag, PCB_ACTIONS::dragFreeAngle.MakeEvent() );
 Go( &EDIT_TOOL::Rotate, PCB_ACTIONS::rotateCw.MakeEvent() );
 Go( &EDIT_TOOL::Rotate, PCB_ACTIONS::rotateCcw.MakeEvent() );
 Go( &EDIT_TOOL::Flip, PCB_ACTIONS::flip.MakeEvent() );
 Go( &EDIT_TOOL::Remove, ACTIONS::doDelete.MakeEvent() );
 Go( &EDIT_TOOL::Remove, PCB_ACTIONS::deleteFull.MakeEvent() );
 Go( &EDIT_TOOL::Properties, PCB_ACTIONS::properties.MakeEvent() );
 Go( &EDIT_TOOL::MoveExact, PCB_ACTIONS::moveExact.MakeEvent() );
 Go( &EDIT_TOOL::Move, PCB_ACTIONS::moveWithReference.MakeEvent() );
 Go( &EDIT_TOOL::Duplicate, ACTIONS::duplicate.MakeEvent() );
 Go( &EDIT_TOOL::Duplicate, PCB_ACTIONS::duplicateIncrement.MakeEvent() );
 Go( &EDIT_TOOL::CreateArray, PCB_ACTIONS::createArray.MakeEvent() );
 Go( &EDIT_TOOL::Mirror, PCB_ACTIONS::mirrorH.MakeEvent() );
 Go( &EDIT_TOOL::Mirror, PCB_ACTIONS::mirrorV.MakeEvent() );
 Go( &EDIT_TOOL::Swap, PCB_ACTIONS::swap.MakeEvent() );
 Go( &EDIT_TOOL::PackAndMoveFootprints, PCB_ACTIONS::packAndMoveFootprints.MakeEvent() );
 Go( &EDIT_TOOL::ChangeTrackWidth, PCB_ACTIONS::changeTrackWidth.MakeEvent() );
 Go( &EDIT_TOOL::FilletTracks, PCB_ACTIONS::filletTracks.MakeEvent() );
 Go( &EDIT_TOOL::ModifyLines, PCB_ACTIONS::filletLines.MakeEvent() );
 Go( &EDIT_TOOL::ModifyLines, PCB_ACTIONS::chamferLines.MakeEvent() );
 Go( &EDIT_TOOL::SimplifyPolygons, PCB_ACTIONS::simplifyPolygons.MakeEvent() );
 Go( &EDIT_TOOL::HealShapes, PCB_ACTIONS::healShapes.MakeEvent() );
 Go( &EDIT_TOOL::ModifyLines, PCB_ACTIONS::extendLines.MakeEvent() );
 Go( &EDIT_TOOL::BooleanPolygons, PCB_ACTIONS::mergePolygons.MakeEvent() );
 Go( &EDIT_TOOL::BooleanPolygons, PCB_ACTIONS::subtractPolygons.MakeEvent() );
 Go( &EDIT_TOOL::BooleanPolygons, PCB_ACTIONS::intersectPolygons.MakeEvent() );
 Go( &EDIT_TOOL::JustifyText, ACTIONS::leftJustify.MakeEvent() );
 Go( &EDIT_TOOL::JustifyText, ACTIONS::centerJustify.MakeEvent() );
 Go( &EDIT_TOOL::JustifyText, ACTIONS::rightJustify.MakeEvent() );
 
 Go( &EDIT_TOOL::copyToClipboard, ACTIONS::copy.MakeEvent() );
 Go( &EDIT_TOOL::copyToClipboard, PCB_ACTIONS::copyWithReference.MakeEvent() );
 Go( &EDIT_TOOL::cutToClipboard, ACTIONS::cut.MakeEvent() );
}