Allow text variables to reference parent sheet's fields.

Fixes https://gitlab.com/kicad/code/kicad/issues/2466

eeschema/dialogs/dialog_edit_label.cpp

@@ -373,6 +373,11 @@ void DIALOG_LABEL_EDITOR::onScintillaCharAdded( wxStyledTextEvent &aEvent )
 
         m_CurrentText->GetContextualTextVars( &autocompleteTokens );
 
+        SCHEMATIC* schematic = m_CurrentText->Schematic();
+
+        if( schematic && schematic->CurrentSheet().Last() )
+            schematic->CurrentSheet().Last()->GetContextualTextVars( &autocompleteTokens );
+
         for( std::pair<wxString, wxString> entry : Prj().GetTextVars() )
             autocompleteTokens.push_back( entry.first );
     }

eeschema/dialogs/dialog_edit_one_field.cpp

@@ -363,8 +363,16 @@ void DIALOG_SCH_EDIT_ONE_FIELD::onScintillaCharAdded( wxStyledTextEvent &aEvent
         SCH_SHEET*     sheet = dynamic_cast<SCH_SHEET*>( m_field->GetParent() );
 
         if( comp )
+        {
             comp->GetContextualTextVars( &autocompleteTokens );
-        else if( sheet )
+
+            SCHEMATIC* schematic = comp->Schematic();
+
+            if( schematic && schematic->CurrentSheet().Last() )
+                schematic->CurrentSheet().Last()->GetContextualTextVars( &autocompleteTokens );
+        }
+
+        if( sheet )
             sheet->GetContextualTextVars( &autocompleteTokens );
 
         for( std::pair<wxString, wxString> entry : Prj().GetTextVars() )

eeschema/sch_field.cpp

@@ -105,7 +105,17 @@ wxString SCH_FIELD::GetShownText( int aDepth ) const
             [&]( wxString* token ) -> bool
             {
                 SCH_COMPONENT* component = static_cast<SCH_COMPONENT*>( m_Parent );
-                return component->ResolveTextVar( token, aDepth + 1 );
+
+                if( component->ResolveTextVar( token, aDepth + 1 ) )
+                    return true;
+
+                SCHEMATIC* schematic = component->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 =

eeschema/sch_sheet.cpp

@@ -191,7 +191,10 @@ bool SCH_SHEET::IsRootSheet() const
 void SCH_SHEET::GetContextualTextVars( wxArrayString* aVars ) const
 {
     for( int i = 0; i < SHEET_MANDATORY_FIELDS; ++i )
-        aVars->push_back( m_fields[i].GetCanonicalName() );
+        aVars->push_back( m_fields[i].GetCanonicalName().Upper() );
+
+    for( size_t i = SHEET_MANDATORY_FIELDS; i < m_fields.size(); ++i )
+        aVars->push_back( m_fields[i].GetName() );
 
     aVars->push_back( wxT( "#" ) );
     aVars->push_back( wxT( "##" ) );

eeschema/sch_text.cpp

@@ -537,6 +537,14 @@ wxString SCH_TEXT::GetShownText( int aDepth ) const
                             }
                         }
                     }
+                    else
+                    {
+                        SCHEMATIC* schematic = Schematic();
+                        SCH_SHEET* sheet = schematic ? schematic->CurrentSheet().Last() : nullptr;
+
+                        if( sheet && sheet->ResolveTextVar( token, aDepth + 1 ) )
+                            return true;
+                    }
                 }
 
                 return false;