Unify IsSave and IsModify

The flags and calls were used identically, leading to potential
confusion/bugs.  Testing for modification should go through
IsContentModified()

common/base_screen.cpp

@@ -40,7 +40,6 @@ BASE_SCREEN::BASE_SCREEN( EDA_ITEM* aParent, KICAD_T aType ) :
     m_Center            = true;
 
     m_flagModified      = false;     // Set when any change is made on board.
-    m_flagSave          = false;     // Used in auto save set when an auto save is required.
 }
 
 

common/eda_base_frame.cpp

@@ -1025,7 +1025,7 @@ void EDA_BASE_FRAME::CheckForAutoSaveFile( const wxFileName& aFileName )
 }
 
 
-bool EDA_BASE_FRAME::IsContentModified()
+bool EDA_BASE_FRAME::IsContentModified() const
 {
     // This function should be overridden in child classes
     return false;

cvpcb/cvpcb_mainframe.h

@@ -139,7 +139,7 @@ public:
      *
      * @return true if the any changes have not been saved
      */
-    bool IsContentModified() override
+    bool IsContentModified() const override
     {
         return m_modified;
     }

eeschema/files-io.cpp

@@ -188,7 +188,6 @@ bool SCH_EDIT_FRAME::SaveEEFile( SCH_SHEET* aSheet, bool aSaveUnderNewName )
             UpdateFileHistory( schematicFileName.GetFullPath() );
         }
 
-        screen->ClrSave();
         screen->ClrModify();
         UpdateTitle();
 
@@ -1029,6 +1028,10 @@ bool SCH_EDIT_FRAME::doAutoSave()
     wxFileName  tmp;
     SCH_SCREENS screens( Schematic().Root() );
 
+    // Don't run autosave if content has not been modified
+    if( !IsContentModified() )
+        return true;
+
     bool autoSaveOk = true;
 
     if( fn.GetPath().IsEmpty() )
@@ -1047,7 +1050,7 @@ bool SCH_EDIT_FRAME::doAutoSave()
     for( size_t i = 0; i < screens.GetCount(); i++ )
     {
         // Only create auto save files for the schematics that have been modified.
-        if( !screens.GetScreen( i )->IsSave() )
+        if( !screens.GetScreen( i )->IsModify() )
             continue;
 
         tmpFileName = fn = screens.GetScreen( i )->GetFileName();

eeschema/sch_edit_frame.cpp

@@ -783,7 +783,6 @@ void SCH_EDIT_FRAME::OnModify()
         return;
 
     GetScreen()->SetModify();
-    GetScreen()->SetSave();
 
     if( ADVANCED_CFG::GetCfg().m_RealTimeConnectivity && CONNECTION_GRAPH::m_allowRealTime )
         RecalculateConnections( NO_CLEANUP );
@@ -1099,13 +1098,7 @@ bool SCH_EDIT_FRAME::isAutoSaveRequired() const
 
     if( Schematic().IsValid() )
     {
-        SCH_SCREENS screenList( Schematic().Root() );
-
-        for( SCH_SCREEN* screen = screenList.GetFirst(); screen; screen = screenList.GetNext() )
-        {
-            if( screen->IsSave() )
-                return true;
-        }
+        return IsContentModified();
     }
 
     return false;
@@ -1555,7 +1548,7 @@ void SCH_EDIT_FRAME::FixupJunctions()
 }
 
 
-bool SCH_EDIT_FRAME::IsContentModified()
+bool SCH_EDIT_FRAME::IsContentModified() const
 {
     return Schematic().GetSheets().IsModified();
 }

eeschema/sch_edit_frame.h

@@ -175,7 +175,7 @@ public:
      *
      * @return true if the any changes have not been saved
      */
-    bool IsContentModified() override;
+    bool IsContentModified() const override;
 
     /**
      * Must be called after a schematic change in order to set the "modify" flag of the

eeschema/symbol_editor/symbol_edit_frame.cpp

@@ -1230,7 +1230,7 @@ bool SYMBOL_EDIT_FRAME::HasLibModifications() const
 }
 
 
-bool SYMBOL_EDIT_FRAME::IsContentModified()
+bool SYMBOL_EDIT_FRAME::IsContentModified() const
 {
     wxCHECK( m_libMgr, false );
 

eeschema/symbol_editor/symbol_edit_frame.h

@@ -66,7 +66,7 @@ public:
      *
      * @return true if the any changes have not been saved
      */
-    bool IsContentModified() override;
+    bool IsContentModified() const override;
 
     /**
      * Check if any pending libraries have been modified.
@@ -100,7 +100,7 @@ public:
      *
      * This is a LIB_PART that I own, it is at best a copy of one in a library.
      */
-    LIB_PART* GetCurPart() { return m_my_part; }
+    LIB_PART* GetCurPart() const { return m_my_part; }
 
     /**
      * Take ownership of aPart and notes that it is the one currently being edited.

include/base_screen.h

@@ -58,10 +58,7 @@ public:
 
     void SetModify()        { m_flagModified = true; }
     void ClrModify()        { m_flagModified = false; }
-    void SetSave()          { m_flagSave = true; }
-    void ClrSave()          { m_flagSave = false; }
     bool IsModify() const   { return m_flagModified; }
-    bool IsSave() const     { return m_flagSave; }
 
     /**
      * Return the class name.
@@ -134,7 +131,6 @@ protected:
 
 private:
     bool        m_flagModified;     ///< Indicates current drawing has been modified.
-    bool        m_flagSave;         ///< Indicates automatic file save.
 
     /**
      * The cross hair position in logical (drawing) units.  The cross hair is not the cursor

include/eda_base_frame.h

@@ -498,7 +498,7 @@ public:
      *
      * @return true if the contents of the frame have not been saved
      */
-    virtual bool IsContentModified();
+    virtual bool IsContentModified() const;
 
     /**
      * Get the undecorated window size that can be used for restoring the window size.

pagelayout_editor/pl_editor_frame.cpp

@@ -328,7 +328,7 @@ bool PL_EDITOR_FRAME::OpenProjectFiles( const std::vector<wxString>& aFileSet, i
 }
 
 
-bool PL_EDITOR_FRAME::IsContentModified()
+bool PL_EDITOR_FRAME::IsContentModified() const
 {
     return GetScreen() && GetScreen()->IsModify();
 }

pagelayout_editor/pl_editor_frame.h

@@ -101,7 +101,7 @@ public:
      *
      * @return true if the any changes have not been saved
      */
-    bool IsContentModified() override;
+    bool IsContentModified() const override;
 
     /*
      * Function OnExit

pcbnew/files.cpp

@@ -1065,7 +1065,6 @@ bool PCB_EDIT_FRAME::SavePcbFile( const wxString& aFileName, bool addToHistory,
         m_infoBar->Dismiss();
 
     GetScreen()->ClrModify();
-    GetScreen()->ClrSave();
     UpdateTitle();
     return true;
 }
@@ -1140,6 +1139,10 @@ bool PCB_EDIT_FRAME::doAutoSave()
 {
     wxFileName tmpFileName;
 
+    // Don't run autosave if content has not been modified
+    if( !IsContentModified() )
+        return true;
+
     wxString title = GetTitle();    // Save frame title, that can be modified by the save process
 
     if( GetBoard()->GetFileName().IsEmpty() )

pcbnew/footprint_edit_frame.cpp

@@ -316,7 +316,7 @@ FOOTPRINT_EDIT_FRAME::~FOOTPRINT_EDIT_FRAME()
 }
 
 
-bool FOOTPRINT_EDIT_FRAME::IsContentModified()
+bool FOOTPRINT_EDIT_FRAME::IsContentModified() const
 {
     return GetScreen() && GetScreen()->IsModify() && GetBoard() && GetBoard()->GetFirstFootprint();
 }

pcbnew/footprint_edit_frame.h

@@ -55,7 +55,7 @@ public:
      *
      * @return true if the any changes have not been saved
      */
-    bool IsContentModified() override;
+    bool IsContentModified() const override;
 
     bool IsCurrentFPFromBoard() const;
 

pcbnew/pcb_base_frame.cpp

@@ -690,7 +690,6 @@ void PCB_BASE_FRAME::CommonSettingsChanged( bool aEnvVarsChanged, bool aTextVars
 void PCB_BASE_FRAME::OnModify()
 {
     GetScreen()->SetModify();
-    GetScreen()->SetSave();
 
     GetBoard()->IncrementTimeStamp();
 

pcbnew/pcb_edit_frame.cpp

@@ -447,7 +447,7 @@ void PCB_EDIT_FRAME::SetPageSettings( const PAGE_INFO& aPageSettings )
 }
 
 
-bool PCB_EDIT_FRAME::IsContentModified()
+bool PCB_EDIT_FRAME::IsContentModified() const
 {
     return GetScreen() && GetScreen()->IsModify();
 }
@@ -456,7 +456,7 @@ bool PCB_EDIT_FRAME::IsContentModified()
 bool PCB_EDIT_FRAME::isAutoSaveRequired() const
 {
     if( GetScreen() )
-        return GetScreen()->IsSave();
+        return GetScreen()->IsModify();
 
     return false;
 }

pcbnew/pcb_edit_frame.h

@@ -91,7 +91,7 @@ public:
      *
      * @return true if the any changes have not been saved
      */
-    bool IsContentModified() override;
+    bool IsContentModified() const override;
 
     /**
      * Reload the Python plugins if they are newer than the already loaded, and load new