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kicad/eeschema/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();
}
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