generalize the BOARD loading process PCB_EDIT_FRAME::LoadOnePcbFile() to use any supported PLUGIN

common/wildcards_and_files_ext.cpp

@@ -55,6 +55,7 @@ const wxString SchematicFileWildcard( _( "KiCad schematic files (*.sch)|*.sch" )
 const wxString NetlistFileWildcard( _( "KiCad netlist files (*.net)|*.net" ) );
 const wxString GerberFileWildcard( _( "Gerber files (*.pho)|*.pho" ) );
 const wxString LegacyPcbFileWildcard( _( "KiCad printed circuit board files (*.brd)|*.brd" ) );
+const wxString EaglePcbFileWildcard( _( "Eagle printed circuit board files (*.brd)|*.brd" ) );
 const wxString PcbFileWildcard( _( "KiCad s-expr printed circuit board files (*.kicad_pcb)|*.kicad_pcb" ) );
 const wxString FootprintLibFileWildcard( _( "KiCad footprint library file (*.mod)|*.mod" ) );
 const wxString PdfFileWildcard( _( "Portable document format files (*.pdf)|*.pdf" ) );

include/wildcards_and_files_ext.h

@@ -63,6 +63,7 @@ extern const wxString NetlistFileWildcard;
 extern const wxString GerberFileWildcard;
 extern const wxString LegacyPcbFileWildcard;
 extern const wxString PcbFileWildcard;
+extern const wxString EaglePcbFileWildcard;
 extern const wxString PdfFileWildcard;
 extern const wxString MacrosFileWildcard;
 extern const wxString AllFilesWildcard;

pcbnew/files.cpp

@@ -121,8 +121,8 @@ void PCB_EDIT_FRAME::Files_io( wxCommandEvent& event )
             fn.SetExt( PcbFileExtension );
             GetScreen()->SetFileName( fn.GetFullPath() );
             UpdateTitle();
-        break;
         }
+        break;
 
     case ID_APPEND_FILE:
         LoadOnePcbFile( wxEmptyString, true );
@@ -154,8 +154,6 @@ void PCB_EDIT_FRAME::Files_io( wxCommandEvent& event )
 bool PCB_EDIT_FRAME::LoadOnePcbFile( const wxString& aFileName, bool aAppend,
                                      bool aForceFileDialog )
 {
-    wxString msg;
-
     if( GetScreen()->IsModify() && !aAppend )
     {
         if( !IsOK( this, _( "The current board has been modified.  Do you wish to discard \
@@ -172,10 +170,30 @@ the changes?" ) ) )
 
     wxFileName  fileName = aFileName;
 
+    IO_MGR::PCB_FILE_T  pluginType = IO_MGR::LEGACY;
+
+    static const struct {
+        const wxString&     filter;
+        IO_MGR::PCB_FILE_T  pluginType;
+    } loaders[] = {
+        { LegacyPcbFileWildcard,    IO_MGR::LEGACY },
+        { PcbFileWildcard,          IO_MGR::KICAD },
+        { EaglePcbFileWildcard,     IO_MGR::EAGLE },
+    };
+
     if( !fileName.IsOk() || !fileName.FileExists() || aForceFileDialog )
     {
         wxString name;
         wxString path = wxGetCwd();
+        wxString fileFilters;
+
+        for( unsigned i = 0; i<DIM( loaders );  ++i )
+        {
+            if( i > 0 )
+                fileFilters += wxChar( '|' );
+
+            fileFilters += loaders[i].filter;
+        }
 
         if( aForceFileDialog && fileName.FileExists() )
         {
@@ -183,7 +201,7 @@ the changes?" ) ) )
             name = fileName.GetFullName();
         }
 
-        wxFileDialog dlg( this, _( "Open Board File" ), path, name, LegacyPcbFileWildcard,
+        wxFileDialog dlg( this, _( "Open Board File" ), path, name, fileFilters,
                           wxFD_OPEN | wxFD_FILE_MUST_EXIST );
 
         if( dlg.ShowModal() == wxID_CANCEL )
@@ -191,10 +209,15 @@ the changes?" ) ) )
 
         fileName = dlg.GetPath();
 
-        if( !fileName.HasExt() )
+        int chosenFilter = dlg.GetFilterIndex();
-            fileName.SetExt( PcbFileExtension );
+        pluginType = loaders[chosenFilter].pluginType;
     }
 
+    PLUGIN::RELEASER pi( IO_MGR::PluginFind( pluginType ) );
+
+    if( !fileName.HasExt() )
+        fileName.SetExt( pi->GetFileExtension() );
+
     if( !aAppend )
         Clear_Pcb( false );     // pass false since we prompted above for a modified board
 
@@ -224,13 +247,12 @@ the changes?" ) ) )
     try
     {
         // load or append either:
-        loadedBoard = IO_MGR::Load( IO_MGR::LEGACY, GetScreen()->GetFileName(),
+        loadedBoard = pi->Load( GetScreen()->GetFileName(), aAppend ? GetBoard() : NULL, NULL );
-                                    aAppend ? GetBoard() : NULL,
-                                    NULL );
 
         if( !aAppend )
         {
-            if( loadedBoard->GetFileFormatVersionAtLoad() < LEGACY_BOARD_FILE_VERSION )
+            if( pluginType == IO_MGR::LEGACY &&
+                loadedBoard->GetFileFormatVersionAtLoad() < LEGACY_BOARD_FILE_VERSION )
             {
                 DisplayInfoMessage( this, _( "This file was created by an older \
 version of Pcbnew. It will be stored in the new file format when you save \