router_tool.cpp

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/*
 * KiRouter - a push-and-(sometimes-)shove PCB router
 *
 * Copyright (C) 2013-2017 CERN
 * Copyright (C) 2017-2021 KiCad Developers, see AUTHORS.txt for contributors.
 *
 * @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 3 of the License, or (at your
 * option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program. If not, see <http://www.gnu.org/licenses/>.
 */

#include <wx/hyperlink.h>
#include <advanced_config.h>

#include <functional>
using namespace std::placeholders;
#include <board.h>
#include <board_design_settings.h>
#include <board_item.h>
#include <footprint.h>
#include <fp_shape.h>
#include <pad.h>
#include <zone.h>
#include <pcb_edit_frame.h>
#include <pcbnew_id.h>
#include <dialogs/dialog_pns_settings.h>
#include <dialogs/dialog_pns_diff_pair_dimensions.h>
#include <dialogs/dialog_track_via_size.h>
#include <widgets/infobar.h>
#include <widgets/appearance_controls.h>
#include <connectivity/connectivity_data.h>
#include <connectivity/connectivity_algo.h>
#include <confirm.h>
#include <bitmaps.h>
#include <tool/action_menu.h>
#include <tool/tool_manager.h>
#include <tool/tool_menu.h>
#include <tools/pcb_actions.h>
#include <tools/pcb_selection_tool.h>
#include <tools/pcb_grid_helper.h>

#include "router_tool.h"
#include "pns_segment.h"
#include "pns_router.h"
#include "pns_itemset.h"
#include "pns_logger.h"

#include "pns_kicad_iface.h"

#include <plugins/kicad/pcb_plugin.h>

using namespace KIGFX;

enum VIA_ACTION_FLAGS
{
 // Via type
 VIA_MASK = 0x03,
 VIA = 0x00, 
 BLIND_VIA = 0x01, 
 MICROVIA = 0x02, 

 // Select layer
 SELECT_LAYER = VIA_MASK + 1, 
};


// Actions, being statically-defined, require specialized I18N handling. We continue to
// use the _() macro so that string harvesting by the I18N framework doesn't have to be
// specialized, but we don't translate on initialization and instead do it in the getters.

#undef _
#define _(s) s

static const TOOL_ACTION ACT_EndTrack( "pcbnew.InteractiveRouter.EndTrack",
 AS_CONTEXT,
 WXK_END, "",
 _( "Finish Track" ), _( "Stops laying the current track." ),
 BITMAPS::checked_ok );

static const TOOL_ACTION ACT_AutoEndRoute( "pcbnew.InteractiveRouter.AutoEndRoute",
 AS_CONTEXT,
 'F', "",
 _( "Auto-finish Track" ), _( "Automatically finishes laying the current track." ) );

static const TOOL_ACTION ACT_PlaceThroughVia( "pcbnew.InteractiveRouter.PlaceVia",
 AS_CONTEXT,
 'V', LEGACY_HK_NAME( "Add Through Via" ),
 _( "Place Through Via" ),
 _( "Adds a through-hole via at the end of currently routed track." ),
 BITMAPS::via, AF_NONE, (void*) VIA_ACTION_FLAGS::VIA );

static const TOOL_ACTION ACT_PlaceBlindVia( "pcbnew.InteractiveRouter.PlaceBlindVia",
 AS_CONTEXT,
 MD_ALT + MD_SHIFT + 'V', LEGACY_HK_NAME( "Add Blind/Buried Via" ),
 _( "Place Blind/Buried Via" ),
 _( "Adds a blind or buried via at the end of currently routed track."),
 BITMAPS::via_buried, AF_NONE, (void*) VIA_ACTION_FLAGS::BLIND_VIA );

static const TOOL_ACTION ACT_PlaceMicroVia( "pcbnew.InteractiveRouter.PlaceMicroVia",
 AS_CONTEXT,
 MD_CTRL + 'V', LEGACY_HK_NAME( "Add MicroVia" ),
 _( "Place Microvia" ), _( "Adds a microvia at the end of currently routed track." ),
 BITMAPS::via_microvia, AF_NONE, (void*) VIA_ACTION_FLAGS::MICROVIA );

static const TOOL_ACTION ACT_SelLayerAndPlaceThroughVia(
 "pcbnew.InteractiveRouter.SelLayerAndPlaceVia",
 AS_CONTEXT,
 '<', LEGACY_HK_NAME( "Select Layer and Add Through Via" ),
 _( "Select Layer and Place Through Via..." ),
 _( "Select a layer, then add a through-hole via at the end of currently routed track." ),
 BITMAPS::select_w_layer, AF_NONE,
 (void*) ( VIA_ACTION_FLAGS::VIA | VIA_ACTION_FLAGS::SELECT_LAYER ) );

static const TOOL_ACTION ACT_SelLayerAndPlaceBlindVia(
 "pcbnew.InteractiveRouter.SelLayerAndPlaceBlindVia",
 AS_CONTEXT,
 MD_ALT + '<', LEGACY_HK_NAME( "Select Layer and Add Blind/Buried Via" ),
 _( "Select Layer and Place Blind/Buried Via..." ),
 _( "Select a layer, then add a blind or buried via at the end of currently routed track." ),
 BITMAPS::select_w_layer, AF_NONE,
 (void*) ( VIA_ACTION_FLAGS::BLIND_VIA | VIA_ACTION_FLAGS::SELECT_LAYER ) );

static const TOOL_ACTION ACT_SelLayerAndPlaceMicroVia(
 "pcbnew.InteractiveRouter.SelLayerAndPlaceMicroVia",
 AS_CONTEXT,
 0, "",
 _( "Select Layer and Place Micro Via..." ),
 _( "Select a layer, then add a micro via at the end of currently routed track." ),
 BITMAPS::select_w_layer, AF_NONE,
 (void*) ( VIA_ACTION_FLAGS::MICROVIA | VIA_ACTION_FLAGS::SELECT_LAYER ) );

static const TOOL_ACTION ACT_CustomTrackWidth( "pcbnew.InteractiveRouter.CustomTrackViaSize",
 AS_CONTEXT,
 'Q', LEGACY_HK_NAME( "Custom Track/Via Size" ),
 _( "Custom Track/Via Size..." ),
 _( "Shows a dialog for changing the track width and via size." ),
 BITMAPS::width_track );

static const TOOL_ACTION ACT_SwitchPosture( "pcbnew.InteractiveRouter.SwitchPosture",
 AS_CONTEXT,
 '/', LEGACY_HK_NAME( "Switch Track Posture" ),
 _( "Switch Track Posture" ),
 _( "Switches posture of the currently routed track." ),
 BITMAPS::change_entry_orient );

static const TOOL_ACTION ACT_SwitchCornerMode( "pcbnew.InteractiveRouter.SwitchRounding",
 AS_CONTEXT,
 MD_CTRL + '/', "",
 _( "Track Corner Mode" ),
 _( "Switches between sharp/rounded and 45°/90° corners when routing tracks." ),
 BITMAPS::switch_corner_rounding_shape );

#undef _
#define _(s) wxGetTranslation((s))


ROUTER_TOOL::ROUTER_TOOL() :
 TOOL_BASE( "pcbnew.InteractiveRouter" ),
 m_lastTargetLayer( UNDEFINED_LAYER )
{
}


class TRACK_WIDTH_MENU : public ACTION_MENU
{
public:
 TRACK_WIDTH_MENU( PCB_EDIT_FRAME& aFrame ) :
 ACTION_MENU( true ),
 m_frame( aFrame )
 {
 SetIcon( BITMAPS::width_track_via );
 SetTitle( _( "Select Track/Via Width" ) );
 }

protected:
 ACTION_MENU* create() const override
 {
 return new TRACK_WIDTH_MENU( m_frame );
 }

 void update() override
 {
 EDA_UNITS units = m_frame.GetUserUnits();
 BOARD_DESIGN_SETTINGS& bds = m_frame.GetBoard()->GetDesignSettings();
 bool useIndex = !bds.m_UseConnectedTrackWidth &&
 !bds.UseCustomTrackViaSize();
 wxString msg;

 Clear();

 Append( ID_POPUP_PCB_SELECT_AUTO_WIDTH, _( "Use Starting Track Width" ),
 _( "Route using the width of the starting track." ), wxITEM_CHECK );
 Check( ID_POPUP_PCB_SELECT_AUTO_WIDTH,
 bds.m_UseConnectedTrackWidth && !bds.UseCustomTrackViaSize() );

 Append( ID_POPUP_PCB_SELECT_USE_NETCLASS_VALUES, _( "Use Net Class Values" ),
 _( "Use track and via sizes from the net class" ), wxITEM_CHECK );
 Check( ID_POPUP_PCB_SELECT_USE_NETCLASS_VALUES,
 useIndex && bds.GetTrackWidthIndex() == 0 && bds.GetViaSizeIndex() == 0 );

 Append( ID_POPUP_PCB_SELECT_CUSTOM_WIDTH, _( "Use Custom Values..." ),
 _( "Specify custom track and via sizes" ), wxITEM_CHECK );
 Check( ID_POPUP_PCB_SELECT_CUSTOM_WIDTH, bds.UseCustomTrackViaSize() );

 AppendSeparator();

 // Append the list of tracks & via sizes
 for( unsigned i = 0; i < bds.m_TrackWidthList.size(); i++ )
 {
 int width = bds.m_TrackWidthList[i];

 if( i == 0 )
 msg = _( "Track netclass width" );
 else
 msg.Printf( _( "Track %s" ), MessageTextFromValue( units, width ) );

 int menuIdx = ID_POPUP_PCB_SELECT_WIDTH1 + i;
 Append( menuIdx, msg, wxEmptyString, wxITEM_CHECK );
 Check( menuIdx, useIndex && bds.GetTrackWidthIndex() == i );
 }

 AppendSeparator();

 for( unsigned i = 0; i < bds.m_ViasDimensionsList.size(); i++ )
 {
 VIA_DIMENSION via = bds.m_ViasDimensionsList[i];

 if( i == 0 )
 msg = _( "Via netclass values" );
 else
 {
 if( via.m_Drill > 0 )
 msg.Printf( _("Via %s, drill %s" ),
 MessageTextFromValue( units, via.m_Diameter ),
 MessageTextFromValue( units, via.m_Drill ) );
 else
 msg.Printf( _( "Via %s" ), MessageTextFromValue( units, via.m_Diameter ) );
 }

 int menuIdx = ID_POPUP_PCB_SELECT_VIASIZE1 + i;
 Append( menuIdx, msg, wxEmptyString, wxITEM_CHECK );
 Check( menuIdx, useIndex && bds.GetViaSizeIndex() == i );
 }
 }

 OPT_TOOL_EVENT eventHandler( const wxMenuEvent& aEvent ) override
 {
 BOARD_DESIGN_SETTINGS &bds = m_frame.GetBoard()->GetDesignSettings();
 int id = aEvent.GetId();

 // On Windows, this handler can be called with an event ID not existing in any
 // menuitem, so only set flags when we have an ID match.

 if( id == ID_POPUP_PCB_SELECT_CUSTOM_WIDTH )
 {
 bds.UseCustomTrackViaSize( true );
 bds.m_TempOverrideTrackWidth = true;
 m_frame.GetToolManager()->RunAction( ACT_CustomTrackWidth, true );
 }
 else if( id == ID_POPUP_PCB_SELECT_AUTO_WIDTH )
 {
 bds.UseCustomTrackViaSize( false );
 bds.m_UseConnectedTrackWidth = true;
 bds.m_TempOverrideTrackWidth = false;
 }
 else if( id == ID_POPUP_PCB_SELECT_USE_NETCLASS_VALUES )
 {
 bds.UseCustomTrackViaSize( false );
 bds.m_UseConnectedTrackWidth = false;
 bds.SetViaSizeIndex( 0 );
 bds.SetTrackWidthIndex( 0 );
 }
 else if( id >= ID_POPUP_PCB_SELECT_VIASIZE1 && id <= ID_POPUP_PCB_SELECT_VIASIZE16 )
 {
 bds.UseCustomTrackViaSize( false );
 bds.SetViaSizeIndex( id - ID_POPUP_PCB_SELECT_VIASIZE1 );
 }
 else if( id >= ID_POPUP_PCB_SELECT_WIDTH1 && id <= ID_POPUP_PCB_SELECT_WIDTH16 )
 {
 bds.UseCustomTrackViaSize( false );
 bds.m_TempOverrideTrackWidth = true;
 bds.SetTrackWidthIndex( id - ID_POPUP_PCB_SELECT_WIDTH1 );
 }

 return OPT_TOOL_EVENT( PCB_ACTIONS::trackViaSizeChanged.MakeEvent() );
 }

private:
 PCB_EDIT_FRAME& m_frame;
};


class DIFF_PAIR_MENU : public ACTION_MENU
{
public:
 DIFF_PAIR_MENU( PCB_EDIT_FRAME& aFrame ) :
 ACTION_MENU( true ),
 m_frame( aFrame )
 {
 SetIcon( BITMAPS::width_track_via );
 SetTitle( _( "Select Differential Pair Dimensions" ) );
 }

protected:
 ACTION_MENU* create() const override
 {
 return new DIFF_PAIR_MENU( m_frame );
 }

 void update() override
 {
 EDA_UNITS units = m_frame.GetUserUnits();
 const BOARD_DESIGN_SETTINGS& bds = m_frame.GetBoard()->GetDesignSettings();

 Clear();

 Append( ID_POPUP_PCB_SELECT_USE_NETCLASS_DIFFPAIR, _( "Use Net Class Values" ),
 _( "Use differential pair dimensions from the net class" ), wxITEM_CHECK );
 Check( ID_POPUP_PCB_SELECT_USE_NETCLASS_DIFFPAIR,
 !bds.UseCustomDiffPairDimensions() && bds.GetDiffPairIndex() == 0 );

 Append( ID_POPUP_PCB_SELECT_CUSTOM_DIFFPAIR, _( "Use Custom Values..." ),
 _( "Specify custom differential pair dimensions" ), wxITEM_CHECK );
 Check( ID_POPUP_PCB_SELECT_CUSTOM_DIFFPAIR, bds.UseCustomDiffPairDimensions() );

 AppendSeparator();

 // Append the list of differential pair dimensions

 // Drop index 0 which is the current netclass dimensions (which are handled above)
 for( unsigned i = 1; i < bds.m_DiffPairDimensionsList.size(); ++i )
 {
 DIFF_PAIR_DIMENSION diffPair = bds.m_DiffPairDimensionsList[i];
 wxString msg;

 if( diffPair.m_Gap <= 0 )
 {
 if( diffPair.m_ViaGap <= 0 )
 {
 msg.Printf( _( "Width %s" ),
 MessageTextFromValue( units, diffPair.m_Width ) );
 }
 else
 {
 msg.Printf( _( "Width %s, via gap %s" ),
 MessageTextFromValue( units, diffPair.m_Width ),
 MessageTextFromValue( units, diffPair.m_ViaGap ) );
 }
 }
 else
 {
 if( diffPair.m_ViaGap <= 0 )
 {
  msg.Printf( _( "Width %s, gap %s" ),
 MessageTextFromValue( units, diffPair.m_Width ),
 MessageTextFromValue( units, diffPair.m_Gap ) );
 }
 else
 {
 msg.Printf( _( "Width %s, gap %s, via gap %s" ),
 MessageTextFromValue( units, diffPair.m_Width ),
 MessageTextFromValue( units, diffPair.m_Gap ),
 MessageTextFromValue( units, diffPair.m_ViaGap ) );
 }
 }

 int menuIdx = ID_POPUP_PCB_SELECT_DIFFPAIR1 + i - 1;
 Append( menuIdx, msg, wxEmptyString, wxITEM_CHECK );
 Check( menuIdx, !bds.UseCustomDiffPairDimensions() && bds.GetDiffPairIndex() == i );
 }
 }

 OPT_TOOL_EVENT eventHandler( const wxMenuEvent& aEvent ) override
 {
 BOARD_DESIGN_SETTINGS &bds = m_frame.GetBoard()->GetDesignSettings();
 int id = aEvent.GetId();

 // On Windows, this handler can be called with an event ID not existing in any
 // menuitem, so only set flags when we have an ID match.

 if( id == ID_POPUP_PCB_SELECT_CUSTOM_DIFFPAIR )
 {
 bds.UseCustomDiffPairDimensions( true );
 TOOL_MANAGER* toolManager = m_frame.GetToolManager();
 toolManager->RunAction( PCB_ACTIONS::routerDiffPairDialog, true );
 }
 else if( id == ID_POPUP_PCB_SELECT_USE_NETCLASS_DIFFPAIR )
 {
 bds.UseCustomDiffPairDimensions( false );
 bds.SetDiffPairIndex( 0 );
 }
 else if( id >= ID_POPUP_PCB_SELECT_DIFFPAIR1 && id <= ID_POPUP_PCB_SELECT_DIFFPAIR16 )
 {
 bds.UseCustomDiffPairDimensions( false );
 // remember that the menu doesn't contain index 0 (which is the netclass values)
 bds.SetDiffPairIndex( id - ID_POPUP_PCB_SELECT_DIFFPAIR1 + 1 );
 }

 return OPT_TOOL_EVENT( PCB_ACTIONS::trackViaSizeChanged.MakeEvent() );
 }

private:
 PCB_EDIT_FRAME& m_frame;
};


ROUTER_TOOL::~ROUTER_TOOL()
{
}


bool ROUTER_TOOL::Init()
{
 m_lastTargetLayer = UNDEFINED_LAYER;

 PCB_EDIT_FRAME* frame = getEditFrame<PCB_EDIT_FRAME>();

 wxASSERT( frame );

 auto& menu = m_menu.GetMenu();
 menu.SetTitle( _( "Interactive Router" ) );

 m_trackViaMenu = std::make_shared<TRACK_WIDTH_MENU>( *frame );
 m_trackViaMenu->SetTool( this );
 m_menu.AddSubMenu( m_trackViaMenu );

 m_diffPairMenu = std::make_shared<DIFF_PAIR_MENU>( *frame );
 m_diffPairMenu->SetTool( this );
 m_menu.AddSubMenu( m_diffPairMenu );

 auto notRoutingCond =
 [this]( const SELECTION& )
 {
 return !m_router->RoutingInProgress();
 };

 menu.AddItem( ACTIONS::cancelInteractive, SELECTION_CONDITIONS::ShowAlways );

 menu.AddSeparator();

 menu.AddItem( PCB_ACTIONS::routeSingleTrack, notRoutingCond );
 menu.AddItem( PCB_ACTIONS::routeDiffPair, notRoutingCond );
 menu.AddItem( ACT_EndTrack, SELECTION_CONDITIONS::ShowAlways );
 menu.AddItem( PCB_ACTIONS::routerUndoLastSegment, SELECTION_CONDITIONS::ShowAlways );
 menu.AddItem( PCB_ACTIONS::breakTrack, notRoutingCond );

 menu.AddItem( PCB_ACTIONS::drag45Degree, notRoutingCond );
 menu.AddItem( PCB_ACTIONS::dragFreeAngle, notRoutingCond );

// Add( ACT_AutoEndRoute ); // fixme: not implemented yet. Sorry.
 menu.AddItem( ACT_PlaceThroughVia, SELECTION_CONDITIONS::ShowAlways );
 menu.AddItem( ACT_PlaceBlindVia, SELECTION_CONDITIONS::ShowAlways );
 menu.AddItem( ACT_PlaceMicroVia, SELECTION_CONDITIONS::ShowAlways );
 menu.AddItem( ACT_SelLayerAndPlaceThroughVia, SELECTION_CONDITIONS::ShowAlways );
 menu.AddItem( ACT_SelLayerAndPlaceBlindVia, SELECTION_CONDITIONS::ShowAlways );
 menu.AddItem( ACT_SelLayerAndPlaceMicroVia, SELECTION_CONDITIONS::ShowAlways );
 menu.AddItem( ACT_SwitchPosture, SELECTION_CONDITIONS::ShowAlways );
 menu.AddItem( ACT_SwitchCornerMode, SELECTION_CONDITIONS::ShowAlways );

 menu.AddSeparator();

 auto diffPairCond =
 [this]( const SELECTION& )
 {
 return m_router->Mode() == PNS::PNS_MODE_ROUTE_DIFF_PAIR;
 };

 menu.AddMenu( m_trackViaMenu.get(), SELECTION_CONDITIONS::ShowAlways );
 menu.AddMenu( m_diffPairMenu.get(), diffPairCond );

 menu.AddItem( PCB_ACTIONS::routerSettingsDialog, SELECTION_CONDITIONS::ShowAlways );

 menu.AddSeparator();

 frame->AddStandardSubMenus( m_menu );

 return true;
}


void ROUTER_TOOL::Reset( RESET_REASON aReason )
{
 m_lastTargetLayer = UNDEFINED_LAYER;

 if( aReason == RUN )
 TOOL_BASE::Reset( aReason );
}

// Saves the complete event log and the dump of the PCB, allowing us to
// recreate hard-to-find P&S quirks and bugs.

void ROUTER_TOOL::saveRouterDebugLog()
{
 auto logger = m_router->Logger();

 if( ! logger )
 return;

 wxString cwd = wxGetCwd();

 wxFileName fname_log( cwd );
 fname_log.SetName( "pns.log" );

 wxFileName fname_dump( cwd );
 fname_dump.SetName( "pns.dump" );

 wxString msg = wxString::Format( _( "Event file: %s\nBoard dump: %s" ), fname_log.GetFullPath(), fname_log.GetFullPath() );

 int rv = OKOrCancelDialog( nullptr, _("Save router log"), _("Would you like to save the router\nevent log for debugging purposes?"), msg, _("OK"), _("Cancel") );

 if( !rv )
 return;

 FILE *f = fopen( fname_log.GetFullPath().c_str(), "wb" );

 // save base router configuration (mode, etc.)
 fprintf(f, "config %d %d %d %d\n",
 m_router->Settings().Mode(),
 m_router->Settings().RemoveLoops() ? 1 : 0,
 m_router->Settings().GetFixAllSegments() ? 1 : 0,
 static_cast<int>( m_router->Settings().GetCornerMode() )
 );

 const auto& events = logger->GetEvents();

 for( auto evt : events)
 {
 fprintf( f, "event %d %d %d %s\n", evt.p.x, evt.p.y, evt.type,
 static_cast<const char*>( evt.uuid.AsString().c_str() ) );
 }

 fclose( f );

 // Export as *.kicad_pcb format, using a strategy which is specifically chosen
 // as an example on how it could also be used to send it to the system clipboard.

 PCB_PLUGIN pcb_io;

 pcb_io.Save( fname_dump.GetFullPath(), m_iface->GetBoard(), nullptr );
}


void ROUTER_TOOL::handleCommonEvents( TOOL_EVENT& aEvent )
{
 if( aEvent.Category() == TC_VIEW || aEvent.Category() == TC_MOUSE )
 {
 BOX2D viewAreaD = getView()->GetGAL()->GetVisibleWorldExtents();
 m_router->SetVisibleViewArea( BOX2I( viewAreaD.GetOrigin(), viewAreaD.GetSize() ) );
 }

 if( !aEvent.IsKeyPressed() )
 return;

 switch( aEvent.KeyCode() )
 {
 case '0':
 if( !ADVANCED_CFG::GetCfg().m_ShowRouterDebugGraphics )
 return;

 saveRouterDebugLog();
 aEvent.SetPassEvent( false );
 break;
 default:
 break;
 }
}


int ROUTER_TOOL::getStartLayer( const PNS::ITEM* aItem )
{
 int tl = getView()->GetTopLayer();

 if( m_startItem )
 {
 const LAYER_RANGE& ls = m_startItem->Layers();

 if( ls.Overlaps( tl ) )
 return tl;
 else
 return ls.Start();
 }

 return tl;
}


void ROUTER_TOOL::switchLayerOnViaPlacement()
{
 int al = frame()->GetActiveLayer();
 int cl = m_router->GetCurrentLayer();

 if( cl != al )
 {
 m_router->SwitchLayer( al );
 }

 OPT<int> newLayer = m_router->Sizes().PairedLayer( cl );

 if( !newLayer )
 newLayer = m_router->Sizes().GetLayerTop();

 m_router->SwitchLayer( *newLayer );
 m_lastTargetLayer = *newLayer;
}


static VIATYPE getViaTypeFromFlags( int aFlags )
{
 switch( aFlags & VIA_ACTION_FLAGS::VIA_MASK )
 {
 case VIA_ACTION_FLAGS::VIA:
 return VIATYPE::THROUGH;
 case VIA_ACTION_FLAGS::BLIND_VIA:
 return VIATYPE::BLIND_BURIED;
 case VIA_ACTION_FLAGS::MICROVIA:
 return VIATYPE::MICROVIA;
 default:
 wxASSERT_MSG( false, wxT( "Unhandled via type" ) );
 return VIATYPE::THROUGH;
 }
}


static PCB_LAYER_ID getTargetLayerFromEvent( const TOOL_EVENT& aEvent )
{
 if( aEvent.IsAction( &PCB_ACTIONS::layerTop ) )
 return F_Cu;
 else if( aEvent.IsAction( &PCB_ACTIONS::layerInner1 ) )
 return In1_Cu;
 else if( aEvent.IsAction( &PCB_ACTIONS::layerInner2 ) )
 return In2_Cu;
 else if( aEvent.IsAction( &PCB_ACTIONS::layerInner3 ) )
 return In3_Cu;
 else if( aEvent.IsAction( &PCB_ACTIONS::layerInner4 ) )
 return In4_Cu;
 else if( aEvent.IsAction( &PCB_ACTIONS::layerInner5 ) )
 return In5_Cu;
 else if( aEvent.IsAction( &PCB_ACTIONS::layerInner6 ) )
 return In6_Cu;
 else if( aEvent.IsAction( &PCB_ACTIONS::layerInner7 ) )
 return In7_Cu;
 else if( aEvent.IsAction( &PCB_ACTIONS::layerInner8 ) )
 return In8_Cu;
 else if( aEvent.IsAction( &PCB_ACTIONS::layerInner9 ) )
 return In9_Cu;
 else if( aEvent.IsAction( &PCB_ACTIONS::layerInner10 ) )
 return In10_Cu;
 else if( aEvent.IsAction( &PCB_ACTIONS::layerInner11 ) )
 return In11_Cu;
 else if( aEvent.IsAction( &PCB_ACTIONS::layerInner12 ) )
 return In12_Cu;
 else if( aEvent.IsAction( &PCB_ACTIONS::layerInner13 ) )
 return In13_Cu;
 else if( aEvent.IsAction( &PCB_ACTIONS::layerInner14 ) )
 return In14_Cu;
 else if( aEvent.IsAction( &PCB_ACTIONS::layerInner15 ) )
 return In15_Cu;
 else if( aEvent.IsAction( &PCB_ACTIONS::layerInner16 ) )
 return In16_Cu;
 else if( aEvent.IsAction( &PCB_ACTIONS::layerInner17 ) )
 return In17_Cu;
 else if( aEvent.IsAction( &PCB_ACTIONS::layerInner18 ) )
 return In18_Cu;
 else if( aEvent.IsAction( &PCB_ACTIONS::layerInner19 ) )
 return In19_Cu;
 else if( aEvent.IsAction( &PCB_ACTIONS::layerInner20 ) )
 return In20_Cu;
 else if( aEvent.IsAction( &PCB_ACTIONS::layerInner21 ) )
 return In21_Cu;
 else if( aEvent.IsAction( &PCB_ACTIONS::layerInner22 ) )
 return In22_Cu;
 else if( aEvent.IsAction( &PCB_ACTIONS::layerInner23 ) )
 return In23_Cu;
 else if( aEvent.IsAction( &PCB_ACTIONS::layerInner24 ) )
 return In24_Cu;
 else if( aEvent.IsAction( &PCB_ACTIONS::layerInner25 ) )
 return In25_Cu;
 else if( aEvent.IsAction( &PCB_ACTIONS::layerInner26 ) )
 return In26_Cu;
 else if( aEvent.IsAction( &PCB_ACTIONS::layerInner27 ) )
 return In27_Cu;
 else if( aEvent.IsAction( &PCB_ACTIONS::layerInner28 ) )
 return In28_Cu;
 else if( aEvent.IsAction( &PCB_ACTIONS::layerInner29 ) )
 return In29_Cu;
 else if( aEvent.IsAction( &PCB_ACTIONS::layerInner30 ) )
 return In30_Cu;
 else if( aEvent.IsAction( &PCB_ACTIONS::layerBottom ) )
 return B_Cu;
 else
 return UNDEFINED_LAYER;
}


int ROUTER_TOOL::onLayerCommand( const TOOL_EVENT& aEvent )
{
 return handleLayerSwitch( aEvent, false );
}


int ROUTER_TOOL::onViaCommand( const TOOL_EVENT& aEvent )
{
 return handleLayerSwitch( aEvent, true );
}


int ROUTER_TOOL::handleLayerSwitch( const TOOL_EVENT& aEvent, bool aForceVia )
{
 wxCHECK( m_router, 0 );

 if( !IsToolActive() )
 return 0;

 // First see if this is one of the switch layer commands
 LSEQ layers = LSET( board()->GetEnabledLayers() & LSET::AllCuMask() ).Seq();
 PCB_LAYER_ID currentLayer = (PCB_LAYER_ID) m_router->GetCurrentLayer();
 PCB_LAYER_ID targetLayer = UNDEFINED_LAYER;

 if( aEvent.IsAction( &PCB_ACTIONS::layerNext ) )
 {
 if( m_lastTargetLayer == UNDEFINED_LAYER )
 m_lastTargetLayer = currentLayer;

 size_t idx = 0;

 for( size_t i = 0; i < layers.size(); i++ )
 {
 if( layers[i] == m_lastTargetLayer )
 {
 idx = i;
 break;
 }
 }

 idx = ( idx + 1 ) % layers.size();
 targetLayer = layers[idx];
 }
 else if( aEvent.IsAction( &PCB_ACTIONS::layerPrev ) )
 {
 if( m_lastTargetLayer == UNDEFINED_LAYER )
 m_lastTargetLayer = currentLayer;

 size_t idx = 0;

 for( size_t i = 0; i < layers.size(); i++ )
 {
 if( layers[i] == m_lastTargetLayer )
 {
 idx = i;
 break;
 }
 }

 idx = ( idx > 0 ) ? ( idx - 1 ) : ( layers.size() - 1 );
 targetLayer = layers[idx];
 }
 else
 {
 targetLayer = getTargetLayerFromEvent( aEvent );
 }

 if( targetLayer != UNDEFINED_LAYER )
 {
 m_lastTargetLayer = targetLayer;

 if( targetLayer == currentLayer )
 return 0;

 if( !aForceVia && m_router && m_router->SwitchLayer( targetLayer ) )
 {
 updateEndItem( aEvent );
 m_router->Move( m_endSnapPoint, m_endItem ); // refresh
 return 0;
 }
 }

 BOARD_DESIGN_SETTINGS& bds = board()->GetDesignSettings();
 const int layerCount = bds.GetCopperLayerCount();

 PCB_LAYER_ID pairTop = frame()->GetScreen()->m_Route_Layer_TOP;
 PCB_LAYER_ID pairBottom = frame()->GetScreen()->m_Route_Layer_BOTTOM;

 PNS::SIZES_SETTINGS sizes = m_router->Sizes();

 VIATYPE viaType = VIATYPE::THROUGH;
 bool selectLayer = false;

 // Otherwise it is one of the router-specific via commands
 if( targetLayer == UNDEFINED_LAYER )
 {
 const int actViaFlags = aEvent.Parameter<intptr_t>();
 selectLayer = actViaFlags & VIA_ACTION_FLAGS::SELECT_LAYER;

 viaType = getViaTypeFromFlags( actViaFlags );

 // ask the user for a target layer
 if( selectLayer )
 {
 wxPoint endPoint = (wxPoint) view()->ToScreen( m_endSnapPoint );
 endPoint = frame()->GetCanvas()->ClientToScreen( endPoint );

 // Build the list of not allowed layer for the target layer
 LSET not_allowed_ly = LSET::AllNonCuMask();

 if( viaType != VIATYPE::THROUGH )
 {
 not_allowed_ly.set( currentLayer );
 }

 if( viaType == VIATYPE::MICROVIA )
 {
 // Allows only the previous or the next layer from the current layer
 int previous_layer = currentLayer == B_Cu ? layerCount - 2
 : currentLayer - 1;

 int next_layer = currentLayer >= layerCount-2 ? B_Cu
 : currentLayer + 1;

 not_allowed_ly = LSET::AllLayersMask();

 if( previous_layer >= F_Cu && previous_layer != currentLayer )
 not_allowed_ly.reset( previous_layer );

 if( next_layer != currentLayer )
 not_allowed_ly.reset( next_layer );
 }

 targetLayer = frame()->SelectOneLayer( static_cast<PCB_LAYER_ID>( currentLayer ),
 not_allowed_ly, endPoint );

 // Reset the cursor to the end of the track
 controls()->SetCursorPosition( m_endSnapPoint );

 if( targetLayer == UNDEFINED_LAYER ) // cancelled by user
 return 0;

 // One cannot place a blind/buried via on only one layer:
 if( viaType != VIATYPE::THROUGH )
 {
 if( currentLayer == targetLayer )
 return 0;
 }
 }
 }

 // fixme: P&S supports more than one fixed layer pair. Update the dialog?
 sizes.ClearLayerPairs();

 if( !m_router->IsPlacingVia() )
 {
 // Cannot place microvias or blind vias if not allowed (obvious)
 if( ( viaType == VIATYPE::BLIND_BURIED ) && ( !bds.m_BlindBuriedViaAllowed ) )
 {
 WX_INFOBAR* infobar = frame()->GetInfoBar();
 wxHyperlinkCtrl* button = new wxHyperlinkCtrl( infobar, wxID_ANY,
 _( "Show board setup" ),
 wxEmptyString );

 button->Bind( wxEVT_COMMAND_HYPERLINK, std::function<void( wxHyperlinkEvent& aEvent )>(
 [&]( wxHyperlinkEvent& aEvent )
 {
 getEditFrame<PCB_EDIT_FRAME>()->ShowBoardSetupDialog( _( "Constraints" ) );
 } ) );

 infobar->RemoveAllButtons();
 infobar->AddButton( button );

 infobar->ShowMessageFor( _( "Blind/buried vias must first be enabled in "
 "Board Setup > Design Rules > Constraints." ),
 10000, wxICON_ERROR, WX_INFOBAR::MESSAGE_TYPE::DRC_VIOLATION );
 return false;
 }

 if( ( viaType == VIATYPE::MICROVIA ) && ( !bds.m_MicroViasAllowed ) )
 {
 WX_INFOBAR* infobar = frame()->GetInfoBar();
 wxHyperlinkCtrl* button = new wxHyperlinkCtrl( infobar, wxID_ANY,
 _( "Show board setup" ), wxEmptyString );

 button->Bind( wxEVT_COMMAND_HYPERLINK, std::function<void( wxHyperlinkEvent& aEvent )>(
 [&]( wxHyperlinkEvent& aEvent )
 {
 getEditFrame<PCB_EDIT_FRAME>()->ShowBoardSetupDialog( _( "Constraints" ) );
 } ) );

 infobar->RemoveAllButtons();
 infobar->AddButton( button );

 infobar->ShowMessageFor( _( "Microvias must first be enabled in "
 "Board Setup > Design Rules > Constraints." ),
 10000, wxICON_ERROR, WX_INFOBAR::MESSAGE_TYPE::DRC_VIOLATION );
 return false;
 }
 }

 // Convert blind/buried via to a through hole one, if it goes through all layers
 if( viaType == VIATYPE::BLIND_BURIED
 && ( ( targetLayer == B_Cu && currentLayer == F_Cu )
 || ( targetLayer == F_Cu && currentLayer == B_Cu ) ) )
 {
 viaType = VIATYPE::THROUGH;
 }

 if( targetLayer == UNDEFINED_LAYER )
 {
 // Implicic layer selection

 switch( viaType )
 {
 case VIATYPE::THROUGH:
 // use the default layer pair
 currentLayer = pairTop;
 targetLayer = pairBottom;
 break;

 case VIATYPE::MICROVIA:
 // Try to use the layer pair preset, if the layers are adjacent,
 // because a microvia is usually restricted to 2 adjacent copper layers
 if( pairTop > pairBottom ) std::swap( pairTop, pairBottom );

 if( currentLayer == pairTop && pairBottom == pairTop+1 )
 {
 targetLayer = pairBottom;
 }
 else if( currentLayer == pairBottom && pairBottom == pairTop+1 )
 {
 targetLayer = pairTop;
 }
 else if( currentLayer == F_Cu || currentLayer == In1_Cu )
 {
 // front-side microvia
 currentLayer = F_Cu;

 if( layerCount > 2 ) // Ensure the inner layer In1_Cu exists
 targetLayer = In1_Cu;
 else
 targetLayer = B_Cu;
 }
 else if( currentLayer == B_Cu || currentLayer == layerCount - 2 )
 {
 // back-side microvia
 currentLayer = B_Cu,
 targetLayer = (PCB_LAYER_ID) ( layerCount - 2 );
 }
 else
 {
 // This is not optimal: from an internal layer one can want to switch
 // to the previous or the next internal layer
 // but at this point we do not know what the user want.
 targetLayer = PCB_LAYER_ID( currentLayer + 1 );
 }
 break;

 case VIATYPE::BLIND_BURIED:
 if( currentLayer == pairTop || currentLayer == pairBottom )
 {
 // the current layer is on the defined layer pair,
 // swap to the other side
 currentLayer = pairTop;
 targetLayer = pairBottom;
 }
 else
 {
 // the current layer is not part of the current layer pair,
 // so fallback and swap to the top layer of the pair by default
 targetLayer = pairTop;
 }

 // Do not create a broken via (i.e. a via on only one copper layer)
 if( currentLayer == targetLayer )
 {
 WX_INFOBAR* infobar = frame()->GetInfoBar();
 infobar->ShowMessageFor( _( "Blind/buried via need 2 different layers." ),
 2000, wxICON_ERROR,
 WX_INFOBAR::MESSAGE_TYPE::DRC_VIOLATION );
 return 0;
 }

 break;

 default:
 wxFAIL_MSG( wxT( "unexpected via type" ) );
 return 0;
 break;
 }
 }

 sizes.SetViaDiameter( bds.m_ViasMinSize );
 sizes.SetViaDrill( bds.m_MinThroughDrill );

 if( bds.UseNetClassVia() || viaType == VIATYPE::MICROVIA )
 {
 PCB_VIA dummyVia( board() );
 dummyVia.SetViaType( viaType );
 dummyVia.SetLayerPair( currentLayer, targetLayer );

 if( !m_router->GetCurrentNets().empty() )
 dummyVia.SetNetCode( m_router->GetCurrentNets()[0] );

 DRC_CONSTRAINT constraint;

 constraint = bds.m_DRCEngine->EvalRules( VIA_DIAMETER_CONSTRAINT, &dummyVia, nullptr,
 currentLayer );

 if( !constraint.IsNull() )
 sizes.SetViaDiameter( constraint.m_Value.Opt() );

 constraint = bds.m_DRCEngine->EvalRules( HOLE_SIZE_CONSTRAINT, &dummyVia, nullptr,
 currentLayer );

 if( !constraint.IsNull() )
 sizes.SetViaDrill( constraint.m_Value.Opt() );
 }
 else
 {
 sizes.SetViaDiameter( bds.GetCurrentViaSize() );
 sizes.SetViaDrill( bds.GetCurrentViaDrill() );
 }

 sizes.SetViaType( viaType );
 sizes.AddLayerPair( currentLayer, targetLayer );

 m_router->UpdateSizes( sizes );

 if( !m_router->IsPlacingVia() )
 m_router->ToggleViaPlacement();

 m_lastTargetLayer = targetLayer;

 if( m_router->RoutingInProgress() )
 {
 updateEndItem( aEvent );
 m_router->Move( m_endSnapPoint, m_endItem );
 }
 else
 {
 updateStartItem( aEvent );
 }

 return 0;
}


bool ROUTER_TOOL::prepareInteractive()
{
 PCB_EDIT_FRAME* editFrame = getEditFrame<PCB_EDIT_FRAME>();
 int routingLayer = getStartLayer( m_startItem );

 if( !IsCopperLayer( routingLayer ) )
 {
 editFrame->ShowInfoBarError( _( "Tracks on Copper layers only." ) );
 return false;
 }

 editFrame->SetActiveLayer( ToLAYER_ID( routingLayer ) );

 if( !getView()->IsLayerVisible( routingLayer ) )
 {
 editFrame->GetAppearancePanel()->SetLayerVisible( routingLayer, true );
 editFrame->GetCanvas()->Refresh();
 }

 if( m_startItem && m_startItem->Net() > 0 )
 highlightNet( true, m_startItem->Net() );

 controls()->SetAutoPan( true );

 PNS::SIZES_SETTINGS sizes( m_router->Sizes() );

 m_iface->SetStartLayer( routingLayer );

 frame()->GetBoard()->GetDesignSettings().m_TempOverrideTrackWidth = false;
 m_iface->ImportSizes( sizes, m_startItem, -1 );
 sizes.AddLayerPair( frame()->GetScreen()->m_Route_Layer_TOP,
 frame()->GetScreen()->m_Route_Layer_BOTTOM );

 m_router->UpdateSizes( sizes );

 if( !m_router->StartRouting( m_startSnapPoint, m_startItem, routingLayer ) )
 {
 // It would make more sense to leave the net highlighted as the higher-contrast mode
 // makes the router clearances more visible. However, since we just started routing
 // the conversion of the screen from low contrast to high contrast is a bit jarring and
 // makes the infobar coming up less noticeable.
 highlightNet( false );

 frame()->ShowInfoBarError( m_router->FailureReason(), true,
 [&]()
 {
 m_router->ClearViewDecorations();
 } );

 controls()->SetAutoPan( false );
 return false;
 }

 m_endItem = nullptr;
 m_endSnapPoint = m_startSnapPoint;

 UpdateMessagePanel();
 frame()->UndoRedoBlock( true );

 return true;
}


bool ROUTER_TOOL::finishInteractive()
{
 m_router->StopRouting();

 m_startItem = nullptr;
 m_endItem = nullptr;

 UpdateMessagePanel();
 frame()->GetCanvas()->SetCurrentCursor( KICURSOR::ARROW );
 controls()->SetAutoPan( false );
 controls()->ForceCursorPosition( false );
 frame()->UndoRedoBlock( false );
 highlightNet( false );

 return true;
}


void ROUTER_TOOL::performRouting()
{
 m_router->ClearViewDecorations();

 if( !prepareInteractive() )
 return;

 auto setCursor =
 [&]()
 {
 frame()->GetCanvas()->SetCurrentCursor( KICURSOR::PENCIL );
 };

 // Set initial cursor
 setCursor();

 while( TOOL_EVENT* evt = Wait() )
 {
 setCursor();

 // Don't crash if we missed an operation that canceled routing.
 if( !m_router->RoutingInProgress() )
 {
  if( evt->IsCancelInteractive() )
 m_cancelled = true;

 break;
 }

 handleCommonEvents( *evt );

 if( evt->IsMotion() )
 {
 updateEndItem( *evt );
 m_router->Move( m_endSnapPoint, m_endItem );
 }
 else if( evt->IsAction( &PCB_ACTIONS::routerUndoLastSegment ) )
 {
 m_router->UndoLastSegment();
 updateEndItem( *evt );
 m_router->Move( m_endSnapPoint, m_endItem );
 }
 else if( evt->IsClick( BUT_LEFT ) || evt->IsAction( &PCB_ACTIONS::routeSingleTrack ) )
 {
 updateEndItem( *evt );
 bool needLayerSwitch = m_router->IsPlacingVia();
 bool forceFinish = evt->Modifier( MD_SHIFT );

 if( m_router->FixRoute( m_endSnapPoint, m_endItem, forceFinish ) )
 {
 break;
 }

 if( needLayerSwitch )
 switchLayerOnViaPlacement();

 // Synchronize the indicated layer
 PCB_LAYER_ID routingLayer = ToLAYER_ID( m_router->GetCurrentLayer() );
 PCB_EDIT_FRAME* editFrame = getEditFrame<PCB_EDIT_FRAME>();

 editFrame->SetActiveLayer( routingLayer );

 if( !getView()->IsLayerVisible( routingLayer ) )
 {
 editFrame->GetAppearancePanel()->SetLayerVisible( routingLayer, true );
 editFrame->GetCanvas()->Refresh();
 }

 updateEndItem( *evt );
 m_router->Move( m_endSnapPoint, m_endItem );
 m_startItem = nullptr;
 }
 else if( evt->IsAction( &ACT_SwitchCornerMode ) )
 {
 m_router->ToggleCornerMode();
 UpdateMessagePanel();
 updateEndItem( *evt );
 m_router->Move( m_endSnapPoint, m_endItem ); // refresh
 }
 else if( evt->IsAction( &ACT_SwitchPosture ) )
 {
 m_router->FlipPosture();
 updateEndItem( *evt );
 m_router->Move( m_endSnapPoint, m_endItem ); // refresh
 }
 else if( evt->IsAction( &PCB_ACTIONS::properties ) )
 {
 frame()->GetCanvas()->SetCurrentCursor( KICURSOR::ARROW );
 controls()->SetAutoPan( false );
 {
 m_toolMgr->RunAction( ACT_CustomTrackWidth, true );
 }
 controls()->SetAutoPan( true );
 setCursor();
 UpdateMessagePanel();
 }
 else if( evt->IsAction( &ACT_EndTrack ) || evt->IsDblClick( BUT_LEFT ) )
 {
 // Stop current routing:
 m_router->FixRoute( m_endSnapPoint, m_endItem, true );
 break;
 }
 else if( evt->IsCancelInteractive() || evt->IsActivate()
 || evt->IsUndoRedo()
 || evt->IsAction( &PCB_ACTIONS::routerInlineDrag ) )
 {
 if( evt->IsCancelInteractive() && !m_router->RoutingInProgress() )
 m_cancelled = true;

 if( evt->IsActivate() && !evt->IsMoveTool() )
 m_cancelled = true;

 break;
 }
 else if( evt->IsClick( BUT_RIGHT ) )
 {
 m_menu.ShowContextMenu( selection() );
 }
 else
 {
 evt->SetPassEvent();
 }
 }

 m_router->CommitRouting();

 finishInteractive();
}


int ROUTER_TOOL::DpDimensionsDialog( const TOOL_EVENT& aEvent )
{
 PNS::SIZES_SETTINGS sizes = m_router->Sizes();
 DIALOG_PNS_DIFF_PAIR_DIMENSIONS settingsDlg( frame(), sizes );

 if( settingsDlg.ShowModal() == wxID_OK )
 {
 m_router->UpdateSizes( sizes );
 m_savedSizes = sizes;

 BOARD_DESIGN_SETTINGS& bds = frame()->GetBoard()->GetDesignSettings();
 bds.SetCustomDiffPairWidth( sizes.DiffPairWidth() );
 bds.SetCustomDiffPairGap( sizes.DiffPairGap() );
 bds.SetCustomDiffPairViaGap( sizes.DiffPairViaGap() );
 }

 return 0;
}


int ROUTER_TOOL::SettingsDialog( const TOOL_EVENT& aEvent )
{
 DIALOG_PNS_SETTINGS settingsDlg( frame(), m_router->Settings() );

 settingsDlg.ShowModal();

 UpdateMessagePanel();

 return 0;
}


int ROUTER_TOOL::ChangeRouterMode( const TOOL_EVENT& aEvent )
{
 PNS::PNS_MODE mode = aEvent.Parameter<PNS::PNS_MODE>();
 PNS::ROUTING_SETTINGS& settings = m_router->Settings();

 settings.SetMode( mode );

 return 0;
}


int ROUTER_TOOL::CycleRouterMode( const TOOL_EVENT& aEvent )
{
 PNS::ROUTING_SETTINGS& settings = m_router->Settings();
 PNS::PNS_MODE mode = settings.Mode();

 switch( mode )
 {
 case PNS::RM_MarkObstacles: mode = PNS::RM_Shove; break;
 case PNS::RM_Shove: mode = PNS::RM_Walkaround; break;
 case PNS::RM_Walkaround: mode = PNS::RM_MarkObstacles; break;
 }

 settings.SetMode( mode );

 return 0;
}


PNS::PNS_MODE ROUTER_TOOL::GetRouterMode()
{
 return m_router->Settings().Mode();
}


bool ROUTER_TOOL::RoutingInProgress()
{
 return m_router->RoutingInProgress();
}


void ROUTER_TOOL::breakTrack()
{
 if( m_startItem && m_startItem->OfKind( PNS::ITEM::SEGMENT_T ) )
 m_router->BreakSegment( m_startItem, m_startSnapPoint );
}


int ROUTER_TOOL::MainLoop( const TOOL_EVENT& aEvent )
{
 PNS::ROUTER_MODE mode = aEvent.Parameter<PNS::ROUTER_MODE>();
 PCB_EDIT_FRAME* frame = getEditFrame<PCB_EDIT_FRAME>();
 VIEW_CONTROLS* controls = getViewControls();

 if( m_router->RoutingInProgress() )
 {
 if( m_router->Mode() == mode )
 return 0;
 else
 m_router->StopRouting();
 }

 // Deselect all items
 m_toolMgr->RunAction( PCB_ACTIONS::selectionClear, true );

 std::string tool = aEvent.GetCommandStr().get();
 frame->PushTool( tool );

 auto setCursor =
 [&]()
 {
 frame->GetCanvas()->SetCurrentCursor( KICURSOR::PENCIL );
 };

 Activate();
 // Must be done after Activate() so that it gets set into the correct context
 controls->ShowCursor( true );
 controls->ForceCursorPosition( false );
 // Set initial cursor
 setCursor();

 m_router->SetMode( mode );
 m_cancelled = false;

 // Prime the pump
 if( aEvent.HasPosition() )
 m_toolMgr->PrimeTool( controls->GetCursorPosition( false ) );

 // Main loop: keep receiving events
 while( TOOL_EVENT* evt = Wait() )
 {
 if( !evt->IsDrag() )
 setCursor();

 if( evt->IsCancelInteractive() )
 {
 frame->PopTool( tool );
 break;
 }
 else if( evt->IsActivate() )
 {
 if( evt->IsMoveTool() )
 {
 // leave ourselves on the stack so we come back after the move
 break;
 }
 else
 {
 frame->PopTool( tool );
 break;
 }
 }
 else if( evt->Action() == TA_UNDO_REDO_PRE )
 {
 m_router->ClearWorld();
 }
 else if( evt->Action() == TA_UNDO_REDO_POST || evt->Action() == TA_MODEL_CHANGE )
 {
 m_router->SyncWorld();
 }
 else if( evt->IsMotion() )
  {
 updateStartItem( *evt );
 }
 else if( evt->IsAction( &PCB_ACTIONS::dragFreeAngle ) )
 {
 updateStartItem( *evt, true );
 performDragging( PNS::DM_ANY | PNS::DM_FREE_ANGLE );
 }
 else if( evt->IsAction( &PCB_ACTIONS::drag45Degree ) )
 {
 updateStartItem( *evt, true );
 performDragging( PNS::DM_ANY );
 }
 else if( evt->IsAction( &PCB_ACTIONS::breakTrack ) )
 {
 updateStartItem( *evt, true );
 breakTrack( );
 evt->SetPassEvent( false );
 }
 else if( evt->IsClick( BUT_LEFT )
 || evt->IsAction( &PCB_ACTIONS::routeSingleTrack )
 || evt->IsAction( &PCB_ACTIONS::routeDiffPair ) )
 {
 updateStartItem( *evt );

 if( evt->HasPosition() )
 {
 if( evt->Modifier( MD_SHIFT ) )
 performDragging( PNS::DM_ANY );
 else
 performRouting();
 }
 }
 else if( evt->IsAction( &ACT_PlaceThroughVia ) )
 {
 m_toolMgr->RunAction( PCB_ACTIONS::layerToggle, true );
 }
 else if( evt->IsAction( &PCB_ACTIONS::layerChanged ) )
 {
 m_router->SwitchLayer( frame->GetActiveLayer() );
 updateStartItem( *evt );
 }
 else if( evt->IsKeyPressed() )
 {
 // wxWidgets fails to correctly translate shifted keycodes on the wxEVT_CHAR_HOOK
 // event so we need to process the wxEVT_CHAR event that will follow as long as we
 // pass the event.
 evt->SetPassEvent();
 }
 else if( evt->IsClick( BUT_RIGHT ) )
 {
 m_menu.ShowContextMenu( selection() );
 }
 else
 {
 evt->SetPassEvent();
 }

 if( m_cancelled )
 {
 frame->PopTool( tool );
 break;
 }
 }

 // Store routing settings till the next invocation
 m_savedSizes = m_router->Sizes();
 m_router->ClearViewDecorations();

 return 0;
}


void ROUTER_TOOL::performDragging( int aMode )
{
 m_router->ClearViewDecorations();

 VIEW_CONTROLS* ctls = getViewControls();

 if( m_startItem && m_startItem->IsLocked() )
 {
 KIDIALOG dlg( frame(), _( "The selected item is locked." ), _( "Confirmation" ),
 wxOK | wxCANCEL | wxICON_WARNING );
 dlg.SetOKLabel( _( "Drag Anyway" ) );
 dlg.DoNotShowCheckbox( __FILE__, __LINE__ );

 if( dlg.ShowModal() == wxID_CANCEL )
 return;
 }

 // We don't support dragging arcs inside the PNS right now
 if( m_startItem && m_startItem->Kind() == PNS::ITEM::ARC_T )
 {
 if( m_router->RoutingInProgress() )
 m_router->StopRouting();

 m_startItem = nullptr;

 m_gridHelper->SetAuxAxes( false );
 frame()->UndoRedoBlock( false );
 ctls->SetAutoPan( false );
 ctls->ForceCursorPosition( false );
 highlightNet( false );

 m_cancelled = true;

 m_toolMgr->RunAction( PCB_ACTIONS::drag45Degree, false );

 return;
 }

 bool dragStarted = m_router->StartDragging( m_startSnapPoint, m_startItem, aMode );

 if( !dragStarted )
 return;

 if( m_startItem && m_startItem->Net() > 0 )
 highlightNet( true, m_startItem->Net() );

 ctls->SetAutoPan( true );
 m_gridHelper->SetAuxAxes( true, m_startSnapPoint );
 frame()->UndoRedoBlock( true );

 while( TOOL_EVENT* evt = Wait() )
 {
 ctls->ForceCursorPosition( false );

 if( evt->IsMotion() )
 {
 updateEndItem( *evt );
 m_router->Move( m_endSnapPoint, m_endItem );
 }
 else if( evt->IsClick( BUT_LEFT ) )
 {
 if( m_router->FixRoute( m_endSnapPoint, m_endItem ) )
 break;
 }
 else if( evt->IsClick( BUT_RIGHT ) )
 {
 m_menu.ShowContextMenu( selection() );
 }
 else if( evt->IsCancelInteractive() || evt->IsActivate() || evt->IsUndoRedo() )
 {
 if( evt->IsCancelInteractive() && !m_startItem )
 m_cancelled = true;

 if( evt->IsActivate() && !evt->IsMoveTool() )
 m_cancelled = true;

 break;
 }
 else
 {
 evt->SetPassEvent();
 }

 handleCommonEvents( *evt );
 }

 if( m_router->RoutingInProgress() )
 m_router->StopRouting();

 m_startItem = nullptr;

 m_gridHelper->SetAuxAxes( false );
 frame()->UndoRedoBlock( false );
 ctls->SetAutoPan( false );
 ctls->ForceCursorPosition( false );
 highlightNet( false );
}


void ROUTER_TOOL::NeighboringSegmentFilter( const VECTOR2I& aPt, GENERAL_COLLECTOR& aCollector )
{
 /*
 * If the collection contains a trivial line corner (two connected segments)
 * or a non-fanout-via (a via with no more than two connected segments), then
 * trim the collection down to a single item (which one won't matter since
 * they're all connected).
 */

 // First make sure we've got something that *might* match.
 int vias = aCollector.CountType( PCB_VIA_T );
 int traces = aCollector.CountType( PCB_TRACE_T );
 int arcs = aCollector.CountType( PCB_ARC_T );

 if( arcs > 0 || vias > 1 || traces > 2 || vias + traces < 1 )
 return;

 // Fetch first PCB_TRACK (via or trace) as our reference
  PCB_TRACK* reference = nullptr;

 for( int i = 0; !reference && i < aCollector.GetCount(); i++ )
 reference = dynamic_cast<PCB_TRACK*>( aCollector[i] );

 int refNet = reference->GetNetCode();

 wxPoint refPoint( aPt.x, aPt.y );
 EDA_ITEM_FLAGS flags = reference->IsPointOnEnds( refPoint, -1 );

 if( flags & STARTPOINT )
 refPoint = reference->GetStart();
 else if( flags & ENDPOINT )
 refPoint = reference->GetEnd();

 // Check all items to ensure that any TRACKs are co-terminus with the reference and on
 // the same net.
 for( int i = 0; i < aCollector.GetCount(); i++ )
 {
 PCB_TRACK* neighbor = dynamic_cast<PCB_TRACK*>( aCollector[i] );

 if( neighbor && neighbor != reference )
 {
 if( neighbor->GetNetCode() != refNet )
 return;

 if( neighbor->GetStart() != refPoint && neighbor->GetEnd() != refPoint )
 return;
 }
 }

 // Selection meets criteria; trim it to the reference item.
 aCollector.Empty();
 aCollector.Append( reference );
}


bool ROUTER_TOOL::CanInlineDrag( int aDragMode )
{
 m_toolMgr->RunAction( PCB_ACTIONS::selectionCursor, true, NeighboringSegmentFilter );
 const PCB_SELECTION& selection = m_toolMgr->GetTool<PCB_SELECTION_TOOL>()->GetSelection();

 if( selection.Size() == 1 )
 {
 const BOARD_ITEM* item = static_cast<const BOARD_ITEM*>( selection.Front() );

 // Note: EDIT_TOOL::Drag temporarily handles items of type PCB_ARC_T on its own using
 // DragArcTrack(), so PCB_ARC_T should never occur here.
 if( item->IsType( GENERAL_COLLECTOR::DraggableItems ) )
 {
 static const KICAD_T footprints[] = { PCB_FOOTPRINT_T, EOT };

 // Footprints cannot be dragged freely.
 if( item->IsType( footprints ) )
 return !( aDragMode & PNS::DM_FREE_ANGLE );
 else
 return true;
 }
 }

 return false;
}


int ROUTER_TOOL::InlineDrag( const TOOL_EVENT& aEvent )
{
 const PCB_SELECTION& selection = m_toolMgr->GetTool<PCB_SELECTION_TOOL>()->GetSelection();

 if( selection.Empty() )
 m_toolMgr->RunAction( PCB_ACTIONS::selectionCursor, true, NeighboringSegmentFilter );

 if( selection.Size() != 1 )
 return 0;

 BOARD_ITEM* item = static_cast<BOARD_ITEM*>( selection.Front() );

 if( item->Type() != PCB_TRACE_T
 && item->Type() != PCB_VIA_T
 && item->Type() != PCB_FOOTPRINT_T )
 {
 return 0;
 }

 // If we overrode locks, we want to clear the flag from the source item before SyncWorld is
 // called so that virtual vias are not generated for the (now unlocked) track segment. Note in
 // this case the lock can't be reliably re-applied, because there is no guarantee that the end
 // state of the drag results in the same number of segments so it's not clear which segment to
 // apply the lock state to.
 bool wasLocked = false;

 if( item->IsLocked() )
 {
 wasLocked = true;
 item->SetLocked( false );
 }

 Activate();

 m_toolMgr->RunAction( PCB_ACTIONS::selectionClear, true );
 m_router->SyncWorld();
 m_startItem = nullptr;

 PNS::ITEM* startItem = nullptr;
 PNS::ITEM_SET itemsToDrag;
 const FOOTPRINT* footprint = nullptr;

 std::shared_ptr<CONNECTIVITY_DATA> connectivityData = board()->GetConnectivity();
 std::vector<BOARD_ITEM*> dynamicItems;
 std::unique_ptr<CONNECTIVITY_DATA> dynamicData = nullptr;
 VECTOR2I lastOffset;

 if( item->Type() == PCB_FOOTPRINT_T )
 {
 footprint = static_cast<const FOOTPRINT*>(item);

 for( PAD* pad : footprint->Pads() )
 {
 PNS::ITEM* solid = m_router->GetWorld()->FindItemByParent( pad );

 if( solid )
 itemsToDrag.Add( solid );

 if( pad->GetLocalRatsnestVisible() || displayOptions().m_ShowModuleRatsnest )
 {
  if( connectivityData->GetRatsnestForPad( pad ).size() > 0 )
 dynamicItems.push_back( pad );
 }
 }

 dynamicData = std::make_unique<CONNECTIVITY_DATA>( dynamicItems, true );
 connectivityData->BlockRatsnestItems( dynamicItems );
 }
 else
 {
 startItem = m_router->GetWorld()->FindItemByParent( item );

 if( startItem )
 itemsToDrag.Add( startItem );
 }

 GAL* gal = m_toolMgr->GetView()->GetGAL();
 VECTOR2I p0 = controls()->GetCursorPosition( false );
 VECTOR2I p = p0;

 m_gridHelper->SetUseGrid( gal->GetGridSnapping() && !aEvent.DisableGridSnapping() );
 m_gridHelper->SetSnap( !aEvent.Modifier( MD_SHIFT ) );

 if( startItem )
 {
 p = snapToItem( startItem, p0 );
 m_startItem = startItem;

 if( m_startItem && m_startItem->Net() > 0 )
 highlightNet( true, m_startItem->Net() );
 }
 else if( footprint )
 {
 // The mouse is going to be moved on grid before dragging begins.
 VECTOR2I tweakedMousePos;
 PCB_BASE_EDIT_FRAME* editFrame = getEditFrame<PCB_BASE_EDIT_FRAME>();

 // Check if user wants to warp the mouse to origin of moved object

 if( editFrame->GetMoveWarpsCursor() )
 tweakedMousePos = footprint->GetPosition(); // Use footprint anchor to warp mouse
 else
 tweakedMousePos = controls()->GetCursorPosition(); // Just use current mouse pos

 // We tweak the mouse position using the value from above, and then use that as the
 // start position to prevent the footprint from jumping when we start dragging.
 // First we move the visual cross hair cursor...
 controls()->ForceCursorPosition( true, tweakedMousePos );
 controls()->SetCursorPosition( tweakedMousePos ); // ...then the mouse pointer

 // Now that the mouse is in the right position, get a copy of the position to use later
 p = controls()->GetCursorPosition();
 }

 int dragMode = aEvent.Parameter<int64_t> ();

 bool dragStarted = m_router->StartDragging( p, itemsToDrag, dragMode );

 if( !dragStarted )
 {
 if( wasLocked )
 item->SetLocked( true );

 return 0;
 }

 m_gridHelper->SetAuxAxes( true, p );
 controls()->ShowCursor( true );
 controls()->SetAutoPan( true );
 frame()->UndoRedoBlock( true );

 view()->ClearPreview();
 view()->InitPreview();

 auto setCursor =
 [&]()
 {
 frame()->GetCanvas()->SetCurrentCursor( KICURSOR::ARROW );
 };

 // Set initial cursor
 setCursor();

 // Set the initial visible area
 BOX2D viewAreaD = getView()->GetGAL()->GetVisibleWorldExtents();
 m_router->SetVisibleViewArea( BOX2I( viewAreaD.GetOrigin(), viewAreaD.GetSize() ) );

 // Send an initial movement to prime the collision detection
 m_router->Move( p, nullptr );

 bool hasMouseMoved = false;

 while( TOOL_EVENT* evt = Wait() )
 {
 setCursor();

 if( evt->IsCancelInteractive() )
 {
 if( wasLocked )
 item->SetLocked( true );

 break;
 }
 else if( evt->IsMotion() || evt->IsDrag( BUT_LEFT ) )
 {
 hasMouseMoved = true;
 updateEndItem( *evt );
 m_router->Move( m_endSnapPoint, m_endItem );

 if( footprint )
 {
 VECTOR2I offset = m_endSnapPoint - p;
 BOARD_ITEM* previewItem;
 wxPoint fp_offset = wxPoint( offset.Rotate( footprint->GetOrientationRadians() ) );

 view()->ClearPreview();

 for( BOARD_ITEM* drawing : footprint->GraphicalItems() )
 {
 previewItem = static_cast<BOARD_ITEM*>( drawing->Clone() );

 if( drawing->Type() == PCB_FP_SHAPE_T )
 {
 FP_SHAPE* shape = static_cast<FP_SHAPE*>( previewItem );
 shape->FP_SHAPE::Move( fp_offset );
 }
 else
 {
 previewItem->Move( offset );
 }

 view()->AddToPreview( previewItem );
 view()->Hide( drawing, true );
 }

 for( PAD* pad : footprint->Pads() )
 {
 if( ( pad->GetLayerSet() & LSET::AllCuMask() ).none()
 && pad->GetDrillSize().x == 0 )
 {
 previewItem = static_cast<BOARD_ITEM*>( pad->Clone() );
 previewItem->Move( offset );

 view()->AddToPreview( previewItem );
 }
 else
 {
 // Pads with copper or holes are handled by the router
 }

 view()->Hide( pad, true );
 }

 previewItem = static_cast<BOARD_ITEM*>( footprint->Reference().Clone() );
 previewItem->Move( offset );
 view()->AddToPreview( previewItem );
 view()->Hide( &footprint->Reference() );

 previewItem = static_cast<BOARD_ITEM*>( footprint->Value().Clone() );
 previewItem->Move( offset );
 view()->AddToPreview( previewItem );
 view()->Hide( &footprint->Value() );

 for( ZONE* zone : footprint->Zones() )
 {
 previewItem = static_cast<BOARD_ITEM*>( zone->Clone() );
 previewItem->Move( offset );
 view()->AddToPreview( previewItem );
 view()->Hide( zone, true );
 }

 // Update ratsnest
 dynamicData->Move( offset - lastOffset );
 lastOffset = offset;
 connectivityData->ComputeDynamicRatsnest( dynamicItems, dynamicData.get(), offset );
 }
 }
 else if( hasMouseMoved && ( evt->IsMouseUp( BUT_LEFT ) || evt->IsClick( BUT_LEFT ) ) )
 {
 updateEndItem( *evt );
 m_router->FixRoute( m_endSnapPoint, m_endItem );
 break;
 }
 else if( evt->Category() == TC_COMMAND )
 {
 // disallow editing commands
 if( evt->IsAction( &ACTIONS::cut )
 || evt->IsAction( &ACTIONS::copy )
 || evt->IsAction( &ACTIONS::paste )
 || evt->IsAction( &ACTIONS::pasteSpecial ) )
 {
 wxBell();
 }
 else
 {
 evt->SetPassEvent();
 }
 }
 else
 {
 evt->SetPassEvent();
 }

 handleCommonEvents( *evt );
 }

 if( footprint )
 {
 for( BOARD_ITEM* drawing : footprint->GraphicalItems() )
 view()->Hide( drawing, false );

 view()->Hide( &footprint->Reference(), false );
 view()->Hide( &footprint->Value(), false );

 for( ZONE* zone : footprint->Zones() )
 view()->Hide( zone, false );

 for( PAD* pad : footprint->Pads() )
 view()->Hide( pad, false );

 view()->ClearPreview();
 view()->ShowPreview( false );

 connectivityData->ClearDynamicRatsnest();
 }

 if( m_router->RoutingInProgress() )
 m_router->StopRouting();

 m_gridHelper->SetAuxAxes( false );
 controls()->SetAutoPan( false );
 controls()->ForceCursorPosition( false );
 frame()->UndoRedoBlock( false );
 highlightNet( false );

 return 0;
}


int ROUTER_TOOL::InlineBreakTrack( const TOOL_EVENT& aEvent )
{
 const SELECTION& selection = m_toolMgr->GetTool<PCB_SELECTION_TOOL>()->GetSelection();

 if( selection.Size() != 1 )
 return 0;

 const BOARD_CONNECTED_ITEM* item =
 static_cast<const BOARD_CONNECTED_ITEM*>( selection.Front() );

 if( item->Type() != PCB_TRACE_T )
 return 0;

 Activate();

 m_toolMgr->RunAction( PCB_ACTIONS::selectionClear, true );
 m_router->SyncWorld();
 m_startItem = m_router->GetWorld()->FindItemByParent( item );

 TOOL_MANAGER* toolManager = frame()->GetToolManager();
 GAL* gal = toolManager->GetView()->GetGAL();

 m_gridHelper->SetUseGrid( gal->GetGridSnapping() && !aEvent.DisableGridSnapping() );
 m_gridHelper->SetSnap( !aEvent.Modifier( MD_SHIFT ) );

 if( toolManager->IsContextMenuActive() )
 {
 // If we're here from a context menu then we need to get the position of the
 // cursor when the context menu was invoked. This is used to figure out the
 // break point on the track.
 m_startSnapPoint = snapToItem( m_startItem, toolManager->GetMenuCursorPos() );
 }
 else
 {
 // If we're here from a hotkey, then get the current mouse position so we know
 // where to break the track.
 m_startSnapPoint = snapToItem( m_startItem, controls()->GetCursorPosition() );
 }

 if( m_startItem && m_startItem->IsLocked() )
 {
 KIDIALOG dlg( frame(), _( "The selected item is locked." ), _( "Confirmation" ),
 wxOK | wxCANCEL | wxICON_WARNING );
 dlg.SetOKLabel( _( "Break Track" ) );
 dlg.DoNotShowCheckbox( __FILE__, __LINE__ );

 if( dlg.ShowModal() == wxID_CANCEL )
 return 0;
 }

 frame()->UndoRedoBlock( true );
 breakTrack();

 if( m_router->RoutingInProgress() )
 m_router->StopRouting();

 frame()->UndoRedoBlock( false );

 return 0;
}


int ROUTER_TOOL::CustomTrackWidthDialog( const TOOL_EVENT& aEvent )
{
 BOARD_DESIGN_SETTINGS& bds = board()->GetDesignSettings();
 DIALOG_TRACK_VIA_SIZE sizeDlg( frame(), bds );

 if( sizeDlg.ShowModal() == wxID_OK )
 {
 bds.m_TempOverrideTrackWidth = true;
 bds.UseCustomTrackViaSize( true );

 TOOL_EVENT dummy;
 onTrackViaSizeChanged( dummy );
 }

 return 0;
}


int ROUTER_TOOL::onTrackViaSizeChanged( const TOOL_EVENT& aEvent )
{
 PNS::SIZES_SETTINGS sizes( m_router->Sizes() );

 if( !m_router->GetCurrentNets().empty() )
 m_iface->ImportSizes( sizes, m_startItem, m_router->GetCurrentNets()[0] );

 m_router->UpdateSizes( sizes );

 // Changing the track width can affect the placement, so call the
 // move routine without changing the destination
 // Update end item first to avoid moving to an invalid/missing item
 updateEndItem( aEvent );
 m_router->Move( m_endSnapPoint, m_endItem );

 UpdateMessagePanel();

 return 0;
}


void ROUTER_TOOL::UpdateMessagePanel()
{
 if( !m_router->RoutingInProgress() )
 {
 frame()->SetMsgPanel( board() );
 return;
 }

 std::vector<MSG_PANEL_ITEM> items;
 PNS::SIZES_SETTINGS sizes( m_router->Sizes() );
 PNS::RULE_RESOLVER* resolver = m_iface->GetRuleResolver();
 bool isDiffPair = m_router->Mode() == PNS::ROUTER_MODE::PNS_MODE_ROUTE_DIFF_PAIR;

 if( m_startItem && m_startItem->Net() > 0 )
 {
 wxString description = isDiffPair ? _( "Routing Diff Pair: %s" ) : _( "Routing Track: %s" );

 NETINFO_ITEM* netInfo = board()->FindNet( m_startItem->Net() );
 wxASSERT( netInfo );

 items.emplace_back( wxString::Format( description, netInfo->GetNetname() ),
 wxString::Format( _( "Net Class: %s" ), netInfo->GetNetClassName() ) );
 }
 else
 {
 items.emplace_back( _( "Routing Track" ), _( "(no net)" ) );
 }

 wxString cornerMode;

 if( m_router->Settings().GetFreeAngleMode() )
 {
 cornerMode = _( "Free-angle" );
 }
 else
 {
 switch( m_router->Settings().GetCornerMode() )
 {
 case DIRECTION_45::CORNER_MODE::MITERED_45: cornerMode = _( "45-degree" ); break;
 case DIRECTION_45::CORNER_MODE::ROUNDED_45: cornerMode = _( "45-degree rounded" ); break;
 case DIRECTION_45::CORNER_MODE::MITERED_90: cornerMode = _( "90-degree" ); break;
 case DIRECTION_45::CORNER_MODE::ROUNDED_90: cornerMode = _( "90-degree rounded" ); break;
 default: break;
 }
 }

 items.emplace_back( _( "Corner Style" ), cornerMode );

 EDA_UNITS units = frame()->GetUserUnits();

 int width = isDiffPair ? sizes.DiffPairWidth() : sizes.TrackWidth();
 items.emplace_back( wxString::Format( _( "Track Width: %s" ),
 MessageTextFromValue( units, width ) ),
 wxString::Format( _( "(from %s)" ), sizes.GetWidthSource() ) );

 if( m_startItem )
 {
 PNS::SEGMENT dummy;
 dummy.SetNet( m_startItem->Net() );

 PNS::CONSTRAINT constraint;

 if( resolver->QueryConstraint( PNS::CONSTRAINT_TYPE::CT_CLEARANCE, &dummy, nullptr,
 m_router->GetCurrentLayer(), &constraint ) )
 {
 items.emplace_back( wxString::Format( _( "Min Clearance: %s" ),
 MessageTextFromValue( units, constraint.m_Value.Min() ) ),
 wxString::Format( _( "(from %s)" ), constraint.m_RuleName ) );
 }
 }

 if( isDiffPair )
 {
 items.emplace_back( _( "Diff Pair Gap" ),
 MessageTextFromValue( units, sizes.DiffPairGap() ) );
 }

 frame()->SetMsgPanel( items );
}


void ROUTER_TOOL::setTransitions()
{
 Go( &ROUTER_TOOL::SelectCopperLayerPair, PCB_ACTIONS::selectLayerPair.MakeEvent() );

 Go( &ROUTER_TOOL::MainLoop, PCB_ACTIONS::routeSingleTrack.MakeEvent() );
 Go( &ROUTER_TOOL::MainLoop, PCB_ACTIONS::routeDiffPair.MakeEvent() );
 Go( &ROUTER_TOOL::DpDimensionsDialog, PCB_ACTIONS::routerDiffPairDialog.MakeEvent() );
 Go( &ROUTER_TOOL::SettingsDialog, PCB_ACTIONS::routerSettingsDialog.MakeEvent() );
 Go( &ROUTER_TOOL::ChangeRouterMode, PCB_ACTIONS::routerHighlightMode.MakeEvent() );
 Go( &ROUTER_TOOL::ChangeRouterMode, PCB_ACTIONS::routerShoveMode.MakeEvent() );
 Go( &ROUTER_TOOL::ChangeRouterMode, PCB_ACTIONS::routerWalkaroundMode.MakeEvent() );
 Go( &ROUTER_TOOL::CycleRouterMode, PCB_ACTIONS::cycleRouterMode.MakeEvent() );
 Go( &ROUTER_TOOL::InlineDrag, PCB_ACTIONS::routerInlineDrag.MakeEvent() );
 Go( &ROUTER_TOOL::InlineBreakTrack, PCB_ACTIONS::breakTrack.MakeEvent() );

 Go( &ROUTER_TOOL::onViaCommand, ACT_PlaceThroughVia.MakeEvent() );
 Go( &ROUTER_TOOL::onViaCommand, ACT_PlaceBlindVia.MakeEvent() );
 Go( &ROUTER_TOOL::onViaCommand, ACT_PlaceMicroVia.MakeEvent() );
 Go( &ROUTER_TOOL::onViaCommand, ACT_SelLayerAndPlaceThroughVia.MakeEvent() );
 Go( &ROUTER_TOOL::onViaCommand, ACT_SelLayerAndPlaceBlindVia.MakeEvent() );
 Go( &ROUTER_TOOL::onViaCommand, ACT_SelLayerAndPlaceMicroVia.MakeEvent() );

 Go( &ROUTER_TOOL::onLayerCommand, PCB_ACTIONS::layerTop.MakeEvent() );
 Go( &ROUTER_TOOL::onLayerCommand, PCB_ACTIONS::layerInner1.MakeEvent() );
 Go( &ROUTER_TOOL::onLayerCommand, PCB_ACTIONS::layerInner2.MakeEvent() );
 Go( &ROUTER_TOOL::onLayerCommand, PCB_ACTIONS::layerInner3.MakeEvent() );
 Go( &ROUTER_TOOL::onLayerCommand, PCB_ACTIONS::layerInner4.MakeEvent() );
 Go( &ROUTER_TOOL::onLayerCommand, PCB_ACTIONS::layerInner5.MakeEvent() );
 Go( &ROUTER_TOOL::onLayerCommand, PCB_ACTIONS::layerInner6.MakeEvent() );
 Go( &ROUTER_TOOL::onLayerCommand, PCB_ACTIONS::layerInner7.MakeEvent() );
 Go( &ROUTER_TOOL::onLayerCommand, PCB_ACTIONS::layerInner8.MakeEvent() );
 Go( &ROUTER_TOOL::onLayerCommand, PCB_ACTIONS::layerInner9.MakeEvent() );
 Go( &ROUTER_TOOL::onLayerCommand, PCB_ACTIONS::layerInner10.MakeEvent() );
 Go( &ROUTER_TOOL::onLayerCommand, PCB_ACTIONS::layerInner11.MakeEvent() );
 Go( &ROUTER_TOOL::onLayerCommand, PCB_ACTIONS::layerInner12.MakeEvent() );
 Go( &ROUTER_TOOL::onLayerCommand, PCB_ACTIONS::layerInner13.MakeEvent() );
 Go( &ROUTER_TOOL::onLayerCommand, PCB_ACTIONS::layerInner14.MakeEvent() );
 Go( &ROUTER_TOOL::onLayerCommand, PCB_ACTIONS::layerInner15.MakeEvent() );
 Go( &ROUTER_TOOL::onLayerCommand, PCB_ACTIONS::layerInner16.MakeEvent() );
 Go( &ROUTER_TOOL::onLayerCommand, PCB_ACTIONS::layerInner17.MakeEvent() );
 Go( &ROUTER_TOOL::onLayerCommand, PCB_ACTIONS::layerInner18.MakeEvent() );
 Go( &ROUTER_TOOL::onLayerCommand, PCB_ACTIONS::layerInner19.MakeEvent() );
 Go( &ROUTER_TOOL::onLayerCommand, PCB_ACTIONS::layerInner20.MakeEvent() );
 Go( &ROUTER_TOOL::onLayerCommand, PCB_ACTIONS::layerInner21.MakeEvent() );
 Go( &ROUTER_TOOL::onLayerCommand, PCB_ACTIONS::layerInner22.MakeEvent() );
 Go( &ROUTER_TOOL::onLayerCommand, PCB_ACTIONS::layerInner23.MakeEvent() );
 Go( &ROUTER_TOOL::onLayerCommand, PCB_ACTIONS::layerInner24.MakeEvent() );
 Go( &ROUTER_TOOL::onLayerCommand, PCB_ACTIONS::layerInner25.MakeEvent() );
 Go( &ROUTER_TOOL::onLayerCommand, PCB_ACTIONS::layerInner26.MakeEvent() );
 Go( &ROUTER_TOOL::onLayerCommand, PCB_ACTIONS::layerInner27.MakeEvent() );
 Go( &ROUTER_TOOL::onLayerCommand, PCB_ACTIONS::layerInner28.MakeEvent() );
 Go( &ROUTER_TOOL::onLayerCommand, PCB_ACTIONS::layerInner29.MakeEvent() );
 Go( &ROUTER_TOOL::onLayerCommand, PCB_ACTIONS::layerInner30.MakeEvent() );
 Go( &ROUTER_TOOL::onLayerCommand, PCB_ACTIONS::layerBottom.MakeEvent() );
 Go( &ROUTER_TOOL::onLayerCommand, PCB_ACTIONS::layerNext.MakeEvent() );
 Go( &ROUTER_TOOL::onLayerCommand, PCB_ACTIONS::layerPrev.MakeEvent() );

 Go( &ROUTER_TOOL::CustomTrackWidthDialog, ACT_CustomTrackWidth.MakeEvent() );
 Go( &ROUTER_TOOL::onTrackViaSizeChanged, PCB_ACTIONS::trackViaSizeChanged.MakeEvent() );
}