sch_field.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2015 Jean-Pierre Charras, jp.charras at wanadoo.fr
 * Copyright (C) 2004-2021 KiCad Developers, see AUTHORS.txt for contributors.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, you may find one here:
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 * or you may search the http://www.gnu.org website for the version 2 license,
 * or you may write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
 */

/*
 * Fields are texts attached to a symbol, some of which have a special meaning.
 * Fields 0 and 1 are very important: reference and value.
 * Field 2 is used as default footprint name.
 * Field 3 is used to point to a datasheet (usually a URL).
 * Fields 4+ are user fields. They can be renamed and can appear in reports.
 */

#include <wx/log.h>
#include <wx/menu.h>
#include <common.h> // for ExpandTextVars
#include <eda_item.h>
#include <sch_edit_frame.h>
#include <plotters/plotter.h>
#include <bitmaps.h>
#include <core/kicad_algo.h>
#include <core/mirror.h>
#include <kiway.h>
#include <general.h>
#include <symbol_library.h>
#include <sch_symbol.h>
#include <sch_field.h>
#include <schematic.h>
#include <settings/color_settings.h>
#include <string_utils.h>
#include <trace_helpers.h>
#include <trigo.h>
#include <eeschema_id.h>
#include <tool/tool_manager.h>
#include <tools/ee_actions.h>

SCH_FIELD::SCH_FIELD( const wxPoint& aPos, int aFieldId, SCH_ITEM* aParent,
 const wxString& aName ) :
 SCH_ITEM( aParent, SCH_FIELD_T ),
 EDA_TEXT( wxEmptyString ),
 m_id( 0 ),
 m_name( aName )
{
 SetTextPos( aPos );
 SetId( aFieldId ); // will also set the layer
 SetVisible( false );
}


SCH_FIELD::~SCH_FIELD()
{
}


EDA_ITEM* SCH_FIELD::Clone() const
{
 return new SCH_FIELD( *this );
}


void SCH_FIELD::SetId( int aId )
{
 m_id = aId;

 if( m_parent && m_parent->Type() == SCH_SHEET_T )
 {
 switch( m_id )
 {
 case SHEETNAME: SetLayer( LAYER_SHEETNAME ); break;
 case SHEETFILENAME: SetLayer( LAYER_SHEETFILENAME ); break;
 default: SetLayer( LAYER_SHEETFIELDS ); break;
 }
 }
 else
 {
 switch( m_id )
 {
 case REFERENCE_FIELD: SetLayer( LAYER_REFERENCEPART ); break;
 case VALUE_FIELD: SetLayer( LAYER_VALUEPART ); break;
 default: SetLayer( LAYER_FIELDS ); break;
 }
 }
}


wxString SCH_FIELD::GetShownText( int aDepth ) const
{
 std::function<bool( wxString* )> symbolResolver =
 [&]( wxString* token ) -> bool
 {
 if( token->Contains( ':' ) )
 {
 if( Schematic()->ResolveCrossReference( token, aDepth ) )
 return true;
 }
 else
 {
 SCH_SYMBOL* parentSymbol = static_cast<SCH_SYMBOL*>( m_parent );

 if( parentSymbol->ResolveTextVar( token, aDepth + 1 ) )
 return true;

 SCHEMATIC* schematic = parentSymbol->Schematic();
 SCH_SHEET* sheet = schematic ? schematic->CurrentSheet().Last() : nullptr;

 if( sheet && sheet->ResolveTextVar( token, aDepth + 1 ) )
 return true;
 }

 return false;
 };

 std::function<bool( wxString* )> sheetResolver =
 [&]( wxString* token ) -> bool
 {
 SCH_SHEET* sheet = static_cast<SCH_SHEET*>( m_parent );
 return sheet->ResolveTextVar( token, aDepth + 1 );
 };

 std::function<bool( wxString* )> globalLabelResolver =
 [&]( wxString* token ) -> bool
 {
 SCH_GLOBALLABEL* globalLabel = static_cast<SCH_GLOBALLABEL*>( m_parent );
 return globalLabel->ResolveTextVar( token, aDepth + 1 );
 };

 PROJECT* project = nullptr;
 wxString text = EDA_TEXT::GetShownText();

 if( text == "~" ) // Legacy placeholder for empty string
 {
 text = "";
 }
 else if( HasTextVars() )
 {
 if( Schematic() )
 project = &Schematic()->Prj();

 if( aDepth < 10 )
 {
 if( m_parent && m_parent->Type() == SCH_SYMBOL_T )
 text = ExpandTextVars( text, &symbolResolver, nullptr, project );
 else if( m_parent && m_parent->Type() == SCH_SHEET_T )
 text = ExpandTextVars( text, &sheetResolver, nullptr, project );
 else if( m_parent && m_parent->Type() == SCH_GLOBAL_LABEL_T )
 text = ExpandTextVars( text, &globalLabelResolver, nullptr, project );
 else
 text = ExpandTextVars( text, project );
 }
 }

 // WARNING: the IDs of FIELDS and SHEETS overlap, so one must check *both* the
 // id and the parent's type.

 if( m_parent && m_parent->Type() == SCH_SYMBOL_T )
 {
 SCH_SYMBOL* parentSymbol = static_cast<SCH_SYMBOL*>( m_parent );

 if( m_id == REFERENCE_FIELD )
 {
 // For more than one part per package, we must add the part selection
 // A, B, ... or 1, 2, .. to the reference.
 if( parentSymbol->GetUnitCount() > 1 )
 text << LIB_SYMBOL::SubReference( parentSymbol->GetUnit() );
 }
 }
 else if( m_parent && m_parent->Type() == SCH_SHEET_T )
 {
 if( m_id == SHEETFILENAME )
 text = _( "File:" ) + wxS( " " )+ text;
 }

 return text;
}


int SCH_FIELD::GetPenWidth() const
{
 return GetEffectiveTextPenWidth();
}


void SCH_FIELD::Print( const RENDER_SETTINGS* aSettings, const wxPoint& aOffset )
{
 wxDC* DC = aSettings->GetPrintDC();
 COLOR4D color = aSettings->GetLayerColor( IsForceVisible() ? LAYER_HIDDEN : m_layer );
 int orient;
 wxPoint textpos;
 int penWidth = GetEffectiveTextPenWidth( aSettings->GetDefaultPenWidth() );

 if( ( !IsVisible() && !IsForceVisible() ) || IsVoid() )
 return;

 // Calculate the text orientation according to the symbol orientation.
 orient = GetTextAngle();

 if( m_parent && m_parent->Type() == SCH_SYMBOL_T )
 {
 SCH_SYMBOL* parentSymbol = static_cast<SCH_SYMBOL*>( m_parent );

 if( parentSymbol && parentSymbol->GetTransform().y1 ) // Rotate symbol 90 degrees.
 {
 if( orient == TEXT_ANGLE_HORIZ )
 orient = TEXT_ANGLE_VERT;
 else
 orient = TEXT_ANGLE_HORIZ;
 }
 }

 /*
 * Calculate the text justification, according to the symbol orientation/mirror.
 * This is a bit complicated due to cumulative calculations:
 * - numerous cases (mirrored or not, rotation)
 * - the GRText function will also recalculate H and V justifications according to the text
 * orientation.
 * - When a symbol is mirrored, the text is not mirrored and justifications are complicated
 * to calculate so the more easily way is to use no justifications (centered text) and use
 * GetBoundingBox to know the text coordinate considered as centered
 */
 EDA_RECT boundaryBox = GetBoundingBox();
 textpos = boundaryBox.Centre() + aOffset;

 GRText( DC, textpos, color, GetShownText(), orient, GetTextSize(), GR_TEXT_HJUSTIFY_CENTER,
 GR_TEXT_VJUSTIFY_CENTER, penWidth, IsItalic(), IsBold() );
}


void SCH_FIELD::ImportValues( const LIB_FIELD& aSource )
{
 SetEffects( aSource );
}


void SCH_FIELD::SwapData( SCH_ITEM* aItem )
{
 wxCHECK_RET( ( aItem != nullptr ) && ( aItem->Type() == SCH_FIELD_T ),
 wxT( "Cannot swap field data with invalid item." ) );

 SCH_FIELD* item = (SCH_FIELD*) aItem;

 std::swap( m_layer, item->m_layer );
 SwapText( *item );
 SwapEffects( *item );
}


const EDA_RECT SCH_FIELD::GetBoundingBox() const
{
 // Calculate the text bounding box:
 EDA_RECT rect = GetTextBox();

 // Calculate the bounding box position relative to the parent:
 wxPoint origin = GetParentPosition();
 wxPoint pos = GetTextPos() - origin;
 wxPoint begin = rect.GetOrigin() - origin;
 wxPoint end = rect.GetEnd() - origin;
 RotatePoint( &begin, pos, GetTextAngle() );
 RotatePoint( &end, pos, GetTextAngle() );

 // Now, apply the symbol transform (mirror/rot)
 TRANSFORM transform;

 if( m_parent && m_parent->Type() == SCH_SYMBOL_T )
 {
 SCH_SYMBOL* parentSymbol = static_cast<SCH_SYMBOL*>( m_parent );

 // Due to the Y axis direction, we must mirror the bounding box,
 // relative to the text position:
 MIRROR( begin.y, pos.y );
 MIRROR( end.y, pos.y );

 transform = parentSymbol->GetTransform();
 }
 else
 {
 transform = TRANSFORM( 1, 0, 0, 1 ); // identity transform
 }

 rect.SetOrigin( transform.TransformCoordinate( begin ) );
 rect.SetEnd( transform.TransformCoordinate( end ) );

 rect.Move( origin );
 rect.Normalize();

 return rect;
}


bool SCH_FIELD::IsHorizJustifyFlipped() const
{
 wxPoint render_center = GetBoundingBox().Centre();
 wxPoint pos = GetPosition();

 switch( GetHorizJustify() )
 {
 case GR_TEXT_HJUSTIFY_LEFT:
 return render_center.x < pos.x;
 case GR_TEXT_HJUSTIFY_RIGHT:
 return render_center.x > pos.x;
 default:
 return false;
 }
}


bool SCH_FIELD::IsVoid() const
{
 return GetText().Len() == 0;
}


bool SCH_FIELD::Matches( const wxFindReplaceData& aSearchData, void* aAuxData ) const
{
 wxString text = GetShownText();
 int flags = aSearchData.GetFlags();
 bool searchHiddenFields = flags & FR_SEARCH_ALL_FIELDS;
 bool searchAndReplace = flags & FR_SEARCH_REPLACE;
 bool replaceReferences = flags & FR_REPLACE_REFERENCES;

 wxLogTrace( traceFindItem, wxT( " child item " )
 + GetSelectMenuText( EDA_UNITS::MILLIMETRES ) );

 if( !IsVisible() && !searchHiddenFields )
 return false;

 if( m_parent && m_parent->Type() == SCH_SYMBOL_T && m_id == REFERENCE_FIELD )
 {
 if( searchAndReplace && !replaceReferences )
 return false;

 SCH_SYMBOL* parentSymbol = static_cast<SCH_SYMBOL*>( m_parent );
 wxASSERT( aAuxData );

 // Take sheet path into account which effects the reference field and the unit for
 // symbols with multiple parts.
 if( aAuxData )
 {
 text = parentSymbol->GetRef((SCH_SHEET_PATH*) aAuxData );

 if( SCH_ITEM::Matches( text, aSearchData ) )
 return true;

 if( parentSymbol->GetUnitCount() > 1 )
 text << LIB_SYMBOL::SubReference( parentSymbol->GetUnit() );
 }
 }

 return SCH_ITEM::Matches( text, aSearchData );
}


bool SCH_FIELD::IsReplaceable() const
{
 if( m_parent && m_parent->Type() == SCH_SYMBOL_T )
 {
 SCH_SYMBOL* parentSymbol = static_cast<SCH_SYMBOL*>( m_parent );

 if( m_id == VALUE_FIELD )
 {
 if( parentSymbol->GetLibSymbolRef() && parentSymbol->GetLibSymbolRef()->IsPower() )
 return false;
 }
 }
 else if( m_parent && m_parent->Type() == SCH_SHEET_T )
 {
 // See comments in SCH_FIELD::Replace(), below.
 if( m_id == SHEETFILENAME )
 return false;
 }
 else if( m_parent && m_parent->Type() == SCH_GLOBAL_LABEL_T )
 {
 return false;
 }

 return true;
}


bool SCH_FIELD::Replace( const wxFindReplaceData& aSearchData, void* aAuxData )
{
 wxString text;
 bool resolve = false; // Replace in source text, not shown text
 bool isReplaced = false;

 if( m_parent && m_parent->Type() == SCH_SYMBOL_T )
 {
 SCH_SYMBOL* parentSymbol = static_cast<SCH_SYMBOL*>( m_parent );

 switch( m_id )
 {
 case REFERENCE_FIELD:
 wxCHECK_MSG( aAuxData, false, wxT( "Need sheetpath to replace in refdes." ) );

 if( !( aSearchData.GetFlags() & FR_REPLACE_REFERENCES ) )
 return false;

 text = parentSymbol->GetRef( (SCH_SHEET_PATH*) aAuxData );
 isReplaced = EDA_ITEM::Replace( aSearchData, text );

 if( isReplaced )
 parentSymbol->SetRef( (SCH_SHEET_PATH*) aAuxData, text );

 break;

 case VALUE_FIELD:
 wxCHECK_MSG( aAuxData, false, wxT( "Need sheetpath to replace in value field." ) );

 text = parentSymbol->GetValue((SCH_SHEET_PATH*) aAuxData, resolve );
 isReplaced = EDA_ITEM::Replace( aSearchData, text );

 if( isReplaced )
 parentSymbol->SetValue( (SCH_SHEET_PATH*) aAuxData, text );

 break;

 case FOOTPRINT_FIELD:
 wxCHECK_MSG( aAuxData, false, wxT( "Need sheetpath to replace in footprint field." ) );

 text = parentSymbol->GetFootprint((SCH_SHEET_PATH*) aAuxData, resolve );
 isReplaced = EDA_ITEM::Replace( aSearchData, text );

 if( isReplaced )
 parentSymbol->SetFootprint( (SCH_SHEET_PATH*) aAuxData, text );

 break;

 default:
 isReplaced = EDA_TEXT::Replace( aSearchData );
 }
 }
 else if( m_parent && m_parent->Type() == SCH_SHEET_T )
 {
 isReplaced = EDA_TEXT::Replace( aSearchData );

 if( m_id == SHEETFILENAME && isReplaced )
 {
 // If we allowed this we'd have a bunch of work to do here, including warning
 // about it not being undoable, checking for recursive hierarchies, reloading
 // sheets, etc. See DIALOG_SHEET_PROPERTIES::TransferDataFromWindow().
 }
 }

 return isReplaced;
}


void SCH_FIELD::Rotate( const wxPoint& aCenter )
{
 wxPoint pt = GetPosition();
 RotatePoint( &pt, aCenter, 900 );
 SetPosition( pt );
}


wxString SCH_FIELD::GetSelectMenuText( EDA_UNITS aUnits ) const
{
 return wxString::Format( "%s '%s'", GetName(), ShortenedShownText() );
}


void SCH_FIELD::GetMsgPanelInfo( EDA_DRAW_FRAME* aFrame, std::vector<MSG_PANEL_ITEM>& aList )
{
 wxString msg;

 aList.emplace_back( _( "Symbol Field" ), GetName() );

 // Don't use GetShownText() here; we want to show the user the variable references
 aList.emplace_back( _( "Text" ), UnescapeString( GetText() ) );

 aList.emplace_back( _( "Visible" ), IsVisible() ? _( "Yes" ) : _( "No" ) );

 aList.emplace_back( _( "Style" ), GetTextStyleName() );

 aList.emplace_back( _( "Text Size" ), MessageTextFromValue( aFrame->GetUserUnits(),
 GetTextWidth() ) );

 switch ( GetHorizJustify() )
 {
 case GR_TEXT_HJUSTIFY_LEFT: msg = _( "Left" ); break;
 case GR_TEXT_HJUSTIFY_CENTER: msg = _( "Center" ); break;
 case GR_TEXT_HJUSTIFY_RIGHT: msg = _( "Right" ); break;
 }

 aList.emplace_back( _( "H Justification" ), msg );

 switch ( GetVertJustify() )
 {
 case GR_TEXT_VJUSTIFY_TOP: msg = _( "Top" ); break;
 case GR_TEXT_VJUSTIFY_CENTER: msg = _( "Center" ); break;
 case GR_TEXT_VJUSTIFY_BOTTOM: msg = _( "Bottom" ); break;
 }

 aList.emplace_back( _( "V Justification" ), msg );
}


void SCH_FIELD::DoHypertextMenu( EDA_DRAW_FRAME* aFrame )
{
 constexpr int START_ID = 1;

 static wxString back = "HYPERTEXT_BACK";
 wxMenu menu;
 SCH_TEXT* label = dynamic_cast<SCH_TEXT*>( m_parent );

 if( label && Schematic() )
 {
 auto it = Schematic()->GetPageRefsMap().find( label->GetText() );

 if( it != Schematic()->GetPageRefsMap().end() )
 {
 std::map<wxString, wxString> sheetNames;
 std::vector<wxString> pageListCopy;

 pageListCopy.insert( pageListCopy.end(), it->second.begin(), it->second.end() );
 if( !Schematic()->Settings().m_IntersheetRefsListOwnPage )
 {
 wxString currentPage = Schematic()->CurrentSheet().GetPageNumber();
 alg::delete_matching( pageListCopy, currentPage );

 if( pageListCopy.empty() )
 return;
 }

 std::sort( pageListCopy.begin(), pageListCopy.end(),
 []( const wxString& a, const wxString& b ) -> bool
 {
 return StrNumCmp( a, b, true ) < 0;
 } );

 for( const SCH_SHEET_PATH& sheet : Schematic()->GetSheets() )
 {
 if( sheet.size() == 1 )
 sheetNames[ sheet.GetPageNumber() ] = _( "<root sheet>" );
 else
 sheetNames[ sheet.GetPageNumber() ] = sheet.Last()->GetName();
 }

 for( int i = 0; i < (int) pageListCopy.size(); ++i )
 {
 menu.Append( i + START_ID, wxString::Format( _( "Go to Page %s (%s)" ),
 pageListCopy[i],
 sheetNames[ pageListCopy[i] ] ) );
 }

 menu.AppendSeparator();
 menu.Append( 999, _( "Back to Previous Selected Sheet" ) );

 int sel = aFrame->GetPopupMenuSelectionFromUser( menu ) - START_ID;
 void* param = nullptr;

 if( sel >= 0 && sel < (int) pageListCopy.size() )
 param = (void*) &pageListCopy[ sel ];
 else if( sel == 999 )
 param = (void*) &back;

 if( param )
 aFrame->GetToolManager()->RunAction( EE_ACTIONS::hypertextCommand, true, param );
 }
 }
}


wxString SCH_FIELD::GetName( bool aUseDefaultName ) const
{
 if( !m_name.IsEmpty() )
 return m_name;
 else if( aUseDefaultName )
 {
 if( m_parent && m_parent->Type() == SCH_SYMBOL_T )
 return TEMPLATE_FIELDNAME::GetDefaultFieldName( m_id );
 else if( m_parent && m_parent->Type() == SCH_SHEET_T )
 return SCH_SHEET::GetDefaultFieldName( m_id );
 else if( m_parent && m_parent->Type() == SCH_GLOBAL_LABEL_T )
 return _( "Intersheet References" );
 }

 return wxEmptyString;
}


wxString SCH_FIELD::GetCanonicalName() const
{
 if( m_parent && m_parent->Type() == SCH_SYMBOL_T )
 {
 switch( m_id )
 {
 case REFERENCE_FIELD: return wxT( "Reference" );
 case VALUE_FIELD: return wxT( "Value" );
 case FOOTPRINT_FIELD: return wxT( "Footprint" );
 case DATASHEET_FIELD: return wxT( "Datasheet" );
 }
 }
 else if( m_parent && m_parent->Type() == SCH_SHEET_T )
 {
 switch( m_id )
 {
 case SHEETNAME: return wxT( "Sheetname" );
 case SHEETFILENAME: return wxT( "Sheetfile" );
 }
 }
 else if( m_parent && m_parent->Type() == SCH_GLOBAL_LABEL_T )
 {
 return wxT( "Intersheet References" );
 }

 return m_name;
}


BITMAPS SCH_FIELD::GetMenuImage() const
{
 if( m_parent && m_parent->Type() == SCH_SYMBOL_T )
 {
 switch( m_id )
 {
 case REFERENCE_FIELD: return BITMAPS::edit_comp_ref;
 case VALUE_FIELD: return BITMAPS::edit_comp_value;
 case FOOTPRINT_FIELD: return BITMAPS::edit_comp_footprint;
 default: return BITMAPS::text;
 }
 }

 return BITMAPS::text;
}


bool SCH_FIELD::HitTest( const wxPoint& aPosition, int aAccuracy ) const
{
 // Do not hit test hidden or empty fields.
 if( !IsVisible() || IsVoid() )
 return false;

 EDA_RECT rect = GetBoundingBox();

 rect.Inflate( aAccuracy );

 return rect.Contains( aPosition );
}


bool SCH_FIELD::HitTest( const EDA_RECT& aRect, bool aContained, int aAccuracy ) const
{
 // Do not hit test hidden fields.
 if( !IsVisible() || IsVoid() )
 return false;

 EDA_RECT rect = aRect;

 rect.Inflate( aAccuracy );

 if( aContained )
 return rect.Contains( GetBoundingBox() );

 return rect.Intersects( GetBoundingBox() );
}


void SCH_FIELD::Plot( PLOTTER* aPlotter ) const
{
 RENDER_SETTINGS* settings = aPlotter->RenderSettings();
 COLOR4D color = settings->GetLayerColor( GetLayer() );
 int penWidth = GetEffectiveTextPenWidth( settings->GetDefaultPenWidth() );

 penWidth = std::max( penWidth, settings->GetMinPenWidth() );

 if( !IsVisible() )
 return;

 if( IsVoid() )
 return;

 // Calculate the text orientation, according to the symbol orientation/mirror
 int orient = GetTextAngle();

 if( m_parent && m_parent->Type() == SCH_SYMBOL_T )
 {
 SCH_SYMBOL* parentSymbol = static_cast<SCH_SYMBOL*>( m_parent );

 if( parentSymbol->GetTransform().y1 ) // Rotate symbol 90 deg.
 {
 if( orient == TEXT_ANGLE_HORIZ )
 orient = TEXT_ANGLE_VERT;
 else
 orient = TEXT_ANGLE_HORIZ;
 }
 }

 /*
 * Calculate the text justification, according to the symbol orientation/mirror.
 * This is a bit complicated due to cumulative calculations:
 * - numerous cases (mirrored or not, rotation)
 * - the plotter's Text function will also recalculate H and V justifications according to
 * the text orientation.
 * - When a symbol is mirrored, the text is not mirrored and justifications are complicated
 * to calculate so the easier way is to use no justifications (centered text) and use
 * GetBoundingBox to know the text coordinate considered as centered
 */
 EDA_RECT BoundaryBox = GetBoundingBox();
 EDA_TEXT_HJUSTIFY_T hjustify = GR_TEXT_HJUSTIFY_CENTER;
 EDA_TEXT_VJUSTIFY_T vjustify = GR_TEXT_VJUSTIFY_CENTER;
 wxPoint textpos = BoundaryBox.Centre();

 aPlotter->Text( textpos, color, GetShownText(), orient, GetTextSize(), hjustify, vjustify,
 penWidth, IsItalic(), IsBold() );
}


void SCH_FIELD::SetPosition( const wxPoint& aPosition )
{
 // Actual positions are calculated by the rotation/mirror transform of the parent symbol
 // of the field. The inverse transform is used to calculate the position relative to the
 // parent symbol.
 if( m_parent && m_parent->Type() == SCH_SYMBOL_T )
 {
 SCH_SYMBOL* parentSymbol = static_cast<SCH_SYMBOL*>( m_parent );
 wxPoint relPos = aPosition - parentSymbol->GetPosition();

 relPos = parentSymbol->GetTransform().InverseTransform().TransformCoordinate( relPos );

 SetTextPos( relPos + parentSymbol->GetPosition() );
 return;
 }

 SetTextPos( aPosition );
}


wxPoint SCH_FIELD::GetPosition() const
{
 if( m_parent && m_parent->Type() == SCH_SYMBOL_T )
 {
 SCH_SYMBOL* parentSymbol = static_cast<SCH_SYMBOL*>( m_parent );
 wxPoint relativePos = GetTextPos() - parentSymbol->GetPosition();

 relativePos = parentSymbol->GetTransform().TransformCoordinate( relativePos );

 return relativePos + parentSymbol->GetPosition();
 }

 return GetTextPos();
}


wxPoint SCH_FIELD::GetParentPosition() const
{
 return m_parent ? m_parent->GetPosition() : wxPoint( 0, 0 );
}


bool SCH_FIELD::operator <( const SCH_ITEM& aItem ) const
{
 if( Type() != aItem.Type() )
 return Type() < aItem.Type();

 auto field = static_cast<const SCH_FIELD*>( &aItem );

 if( GetId() != field->GetId() )
 return GetId() < field->GetId();

 if( GetText() != field->GetText() )
 return GetText() < field->GetText();

 if( GetLibPosition().x != field->GetLibPosition().x )
 return GetLibPosition().x < field->GetLibPosition().x;

 if( GetLibPosition().y != field->GetLibPosition().y )
 return GetLibPosition().y < field->GetLibPosition().y;

 return GetName() < field->GetName();
}