Protect the Kiway dereference

Also find a few more places where we are reaching into a new frame to
perform actions that need to have dialogs closed.

Running actions should also wait for the next cycle rather than being
immediately executed when we are calling into a new frame.  This allow
for the cleanup actions onClose() to happen prior to the next action
starting

Fixes https://gitlab.com/kicad/code/kicad/issues/11891

common/dialog_shim.cpp

@@ -123,7 +123,8 @@ DIALOG_SHIM::DIALOG_SHIM( wxWindow* aParent, wxWindowID id, const wxString& titl
     if( kiwayHolder )
         SetKiway( this, &kiwayHolder->Kiway() );
 
-    Kiway().SetBlockingDialog( this );
+    if( HasKiway() )
+        Kiway().SetBlockingDialog( this );
 
     Bind( wxEVT_CLOSE_WINDOW, &DIALOG_SHIM::OnCloseWindow, this );
     Bind( wxEVT_BUTTON, &DIALOG_SHIM::OnButton, this );
@@ -146,7 +147,8 @@ DIALOG_SHIM::~DIALOG_SHIM()
     if( IsQuasiModal() )
         EndQuasiModal( wxID_CANCEL );
 
-    Kiway().SetBlockingDialog( nullptr );
+    if( HasKiway() )
+        Kiway().SetBlockingDialog( nullptr );
 
     if( m_qmodal_parent_disabler )
         delete m_qmodal_parent_disabler;    // usually NULL by now

eeschema/sim/sim_plot_frame.cpp

@@ -1533,6 +1533,11 @@ void SIM_PLOT_FRAME::onProbe( wxCommandEvent& event )
     if( m_schematicFrame == nullptr )
         return;
 
+    wxWindow* blocking_dialog = m_schematicFrame->Kiway().GetBlockingDialog();
+
+    if( blocking_dialog )
+        blocking_dialog->Close( true );
+
     m_schematicFrame->GetToolManager()->RunAction( EE_ACTIONS::simProbe );
     m_schematicFrame->Raise();
 }
@@ -1545,6 +1550,11 @@ void SIM_PLOT_FRAME::onTune( wxCommandEvent& event )
     if( m_schematicFrame == nullptr )
         return;
 
+    wxWindow* blocking_dialog = m_schematicFrame->Kiway().GetBlockingDialog();
+
+    if( blocking_dialog )
+        blocking_dialog->Close( true );
+
     m_schematicFrame->GetToolManager()->RunAction( EE_ACTIONS::simTune );
     m_schematicFrame->Raise();
 }

eeschema/tools/symbol_editor_control.cpp

@@ -626,7 +626,7 @@ int SYMBOL_EDITOR_CONTROL::AddSymbolToSchematic( const TOOL_EVENT& aEvent )
             symbol->AutoplaceFields( /* aScreen */ nullptr, /* aManual */ false );
 
         schframe->Raise();
-        schframe->GetToolManager()->RunAction( EE_ACTIONS::placeSymbol, true, symbol );
+        schframe->GetToolManager()->RunAction( EE_ACTIONS::placeSymbol, false, symbol );
     }
 
     return 0;

include/kiway_holder.h

@@ -56,6 +56,15 @@ public:
         return *m_kiway;
     }
 
+    /**
+     * Safety check before asking for the Kiway reference
+     * @return true if kiway is non-null
+     */
+    bool HasKiway() const
+    {
+        return m_kiway != nullptr;
+    }
+
     /**
      * Return a reference to the #PROJECT associated with this #KIWAY.
      */

kicad/import_project.cpp

@@ -183,6 +183,11 @@ void KICAD_MANAGER_FRAME::ImportNonKiCadProject( const wxString& aWindowTitle,
     {
         KIWAY_PLAYER* schframe = Kiway().Player( FRAME_SCH, true );
 
+        wxWindow* blocking_dialog = schframe->Kiway().GetBlockingDialog();
+
+        if( blocking_dialog )
+            blocking_dialog->Close( true );
+
         packet = StrPrintf( "%d\n%s", aSchFileType, TO_UTF8( schCopy.GetFullPath() ) );
         schframe->Kiway().ExpressMail( FRAME_SCH, MAIL_IMPORT_FILE, packet, this );
 
@@ -203,6 +208,11 @@ void KICAD_MANAGER_FRAME::ImportNonKiCadProject( const wxString& aWindowTitle,
     {
         KIWAY_PLAYER* pcbframe = Kiway().Player( FRAME_PCB_EDITOR, true );
 
+        wxWindow* blocking_dialog = pcbframe->Kiway().GetBlockingDialog();
+
+        if( blocking_dialog )
+            blocking_dialog->Close( true );
+
         if( !pcbframe->IsVisible() )
             pcbframe->Show( true );
 

pcbnew/footprint_viewer_frame.cpp

@@ -798,6 +798,11 @@ void FOOTPRINT_VIEWER_FRAME::AddFootprintToPCB( wxCommandEvent& aEvent )
             return;
         }
 
+        wxWindow* blocking_dialog = pcbframe->Kiway().GetBlockingDialog();
+
+        if( blocking_dialog )
+            blocking_dialog->Close( true );
+
         toolMgr->RunAction( PCB_ACTIONS::selectionClear, true );
         BOARD_COMMIT commit( pcbframe );
 
@@ -836,7 +841,7 @@ void FOOTPRINT_VIEWER_FRAME::AddFootprintToPCB( wxCommandEvent& aEvent )
         commit.Push( wxT( "Insert footprint" ) );
 
         pcbframe->Raise();
-        toolMgr->RunAction( PCB_ACTIONS::placeFootprint, true, newFootprint );
+        toolMgr->RunAction( PCB_ACTIONS::placeFootprint, false, newFootprint );
 
         newFootprint->ClearFlags();
     }