Eeschema: fix bug #142970 (broken append sheet function)

Fix a few minor coverity warnings.

eeschema/files-io.cpp

@@ -359,19 +359,60 @@ bool SCH_EDIT_FRAME::AppendOneEEProject()
 
     wxLogDebug( wxT( "Importing schematic " ) + fullFileName );
 
+    // Keep trace of the last item in list.
+    // New items will be loaded after this one.
+    SCH_ITEM* bs = screen->GetDrawItems();
+
+    if( bs )
+        while( bs->Next() )
+            bs = bs->Next();
+
     // load the project
     bool success = LoadOneEEFile( screen, fullFileName, true );
 
     if( success )
     {
-        // load sub-sheets
-        EDA_ITEM* bs = screen->GetDrawItems();
+        // the new loaded items need cleaning to avoid duplicate parameters
+        // which should be unique (ref and time stamp).
+        // Clear ref and set a new time stamp for new items
+        if( bs == NULL )
+            bs = screen->GetDrawItems();
+        else
+            bs = bs->Next();
+
         while( bs )
         {
-            // do not append hierarchical sheets
-            if( bs->Type() ==  SCH_SHEET_T )
+            SCH_ITEM* nextbs = bs->Next();
+
+            // To avoid issues with the current hieratchy,
+            // do not load included sheets files and give new filenames
+            // and new sheet names.
+            // There are many tricky cases (loops, creation of complex hierarchies
+            // with duplicate file names, duplicate sheet names...)
+            // So the included sheets names are renamed if existing,
+            // and filenames are just renamed to avoid loops and
+            // creation of complex hierarchies.
+            // If someone want to change it for a better append function, remember
+            // these cases need work to avoid issues.
+            if( bs->Type() == SCH_SHEET_T )
             {
-                screen->Remove( (SCH_SHEET*) bs );
+                SCH_SHEET * sheet = (SCH_SHEET *) bs;
+                time_t newtimestamp = GetNewTimeStamp();
+                sheet->SetTimeStamp( newtimestamp );
+
+                // Check for existing subsheet name in the current sheet
+                wxString tmp = sheet->GetName();
+                sheet->SetName( wxEmptyString );
+                const SCH_SHEET* subsheet = GetScreen()->GetSheet( tmp );
+
+                if( subsheet )
+                    sheet->SetName( wxString::Format( wxT( "Sheet%8.8lX" ), (long) newtimestamp ) );
+                else
+                    sheet->SetName( tmp );
+
+                sheet->SetFileName( wxString::Format( wxT( "file%8.8lX.sch" ), (long) newtimestamp ) );
+                sheet->SetScreen( new SCH_SCREEN( &Kiway() ) );
+                sheet->GetScreen()->SetFileName( sheet->GetFileName() );
             }
             // clear annotation and init new time stamp for the new components
             else if( bs->Type() == SCH_COMPONENT_T )
@@ -383,7 +424,7 @@ bool SCH_EDIT_FRAME::AppendOneEEProject()
                 bs->ClearFlags();
             }
 
-            bs = bs->Next();
+            bs = nextbs;
         }
     }
 

eeschema/libeditframe.cpp

@@ -1191,9 +1191,6 @@ LIB_ITEM* LIB_EDIT_FRAME::LocateItemUsingCursor( const wxPoint& aPosition,
 
     LIB_ITEM* item = locateItem( aPosition, aFilterList );
 
-    if( item == NULL )
-        return NULL;
-
     wxPoint pos = GetNearestGridPosition( aPosition );
 
     if( item == NULL && aPosition != pos )

eeschema/load_one_schematic_file.cpp

@@ -148,7 +148,7 @@ again." );
     // EELAYER i j
     // and the last line is
     // EELAYER END
-    // Skip all lines until end end of header EELAYER END is found
+    // Skip all lines until the end of header "EELAYER END" is found
     while( reader.ReadLine() )
     {
         line = reader.Line();

eeschema/onleftclick.cpp

@@ -112,16 +112,13 @@ void SCH_EDIT_FRAME::OnLeftClick( wxDC* aDC, const wxPoint& aPosition )
 
         item = LocateAndShowItem( aPosition, SCH_COLLECTOR::SheetsOnly );
 
-        if( item )
+        if( item )  // The user has clicked on a sheet: this is an enter sheet command
         {
             m_CurrentSheet->Push( (SCH_SHEET*) item );
             DisplayCurrentSheet();
         }
-        else
-        {
-            wxCHECK_RET( m_CurrentSheet->Last() != g_RootSheet,
-                         wxT( "Cannot leave root sheet.  Bad Programmer!" ) );
-
+        else if( m_CurrentSheet->Last() != g_RootSheet )
+        {   // The user has clicked ouside a sheet:this is an leave sheet command
             m_CurrentSheet->Pop();
             DisplayCurrentSheet();
         }

eeschema/sch_component.cpp

@@ -276,10 +276,11 @@ void SCH_COMPONENT::ResolveAll(
 {
     for( int i = 0;  i < aComponents.GetCount();  ++i )
     {
-        SCH_COMPONENT* c = dynamic_cast<SCH_COMPONENT*>( aComponents[i] );
-        wxASSERT( c );
+        SCH_COMPONENT* cmp = dynamic_cast<SCH_COMPONENT*>( aComponents[i] );
+        wxASSERT( cmp );
 
-        c->Resolve( aLibs );
+        if( cmp )   // cmp == NULL should not occur.
+            cmp->Resolve( aLibs );
     }
 }
 

include/plot_common.h

@@ -673,6 +673,7 @@ public:
     {
         // Avoid non initialized variables:
         pageStreamHandle = streamLengthHandle = fontResDictHandle = 0;
+        pageTreeHandle = 0;
     }
 
     virtual PlotFormat GetPlotterType() const

pcbnew/dialogs/dialog_netlist.cpp

@@ -43,6 +43,7 @@
 #include <class_board_design_settings.h>
 #include <class_board.h>
 #include <class_module.h>
+#include <ratsnest_data.h>
 #include <wildcards_and_files_ext.h>
 
 #include <dialog_netlist.h>
@@ -331,6 +332,10 @@ void DIALOG_NETLIST::OnTestFootprintsClick( wxCommandEvent& event )
 
 void DIALOG_NETLIST::OnCompileRatsnestClick( wxCommandEvent& event )
 {
+    // Rebuild the board connectivity:
+    if( m_parent->IsGalCanvasActive() )
+        m_parent->GetBoard()->GetRatsnest()->ProcessBoard();
+
     m_parent->Compile_Ratsnest( m_dc, true );
 }
 

pcbnew/netlist.cpp

@@ -136,8 +136,8 @@ void PCB_EDIT_FRAME::ReadPcbNetlist( const wxString& aNetlistFileName,
     // Rebuild the board connectivity:
     if( IsGalCanvasActive() )
         board->GetRatsnest()->ProcessBoard();
-    else
-        Compile_Ratsnest( NULL, true );
+
+    Compile_Ratsnest( NULL, true );
 
     SetMsgPanel( board );
     m_canvas->Refresh();