Eeschema: implement loading of global symbol table.

Add global symbol library storage and access to SYMBOL_LIB_TABLE object.

Add code to Eeschema to load global symbol table on start up.

eeschema/eeschema.cpp

@@ -32,6 +32,7 @@
 #include <pgm_base.h>
 #include <kiface_i.h>
 #include <class_drawpanel.h>
+#include <confirm.h>
 #include <gestfich.h>
 #include <eda_dde.h>
 #include <schframe.h>
@@ -44,6 +45,7 @@
 #include <hotkeys.h>
 #include <transform.h>
 #include <wildcards_and_files_ext.h>
+#include <symbol_lib_table.h>
 
 #include <kiway.h>
 #include <sim/sim_plot_frame.h>
@@ -239,6 +241,34 @@ bool IFACE::OnKifaceStart( PGM_BASE* aProgram, int aCtlBits )
 
     wxConfigLoadSetups( KifaceSettings(), cfg_params() );
 
+    try
+    {
+        // The global table is not related to a specific project.  All projects
+        // will use the same global table.  So the KIFACE::OnKifaceStart() contract
+        // of avoiding anything project specific is not violated here.
+        if( !SYMBOL_LIB_TABLE::LoadGlobalTable( SYMBOL_LIB_TABLE::GetGlobalLibTable() ) )
+        {
+            DisplayInfoMessage( NULL, _(
+                "You have run Eeschema for the first time using the new symbol library table "
+                "method for finding symbols.\n\n"
+                "Eeschema has either copied the default table or created an empty table in the "
+                "kicad configuration folder.\n\n"
+                "You must first configure the library table to include all symbol libraries you "
+                "want to use.\n\n"
+                "See the \"Symbol Library Table\" section of Eeschema documentation for more "
+                "information." ) );
+        }
+    }
+    catch( const IO_ERROR& ioe )
+    {
+        wxString msg = wxString::Format( _(
+            "An error occurred attempting to load the global symbol library table:\n\n%s" ),
+            GetChars( ioe.What() )
+            );
+        DisplayError( NULL, msg );
+        return false;
+    }
+
     return true;
 }
 

eeschema/symbol_lib_table.cpp

@@ -40,6 +40,9 @@ using namespace LIB_TABLE_T;
 static const wxChar global_tbl_name[] = wxT( "sym-lib-table" );
 
 
+SYMBOL_LIB_TABLE SYMBOL_LIB_TABLE::m_globalLibTable;   // There can be only one.
+
+
 bool SYMBOL_LIB_TABLE_ROW::operator==( const SYMBOL_LIB_TABLE_ROW& aRow ) const
 {
     return LIB_TABLE_ROW::operator == ( aRow ) && type == aRow.type;
@@ -386,7 +389,7 @@ bool SYMBOL_LIB_TABLE::LoadGlobalTable( SYMBOL_LIB_TABLE& aTable )
         // template folder to the user's home configuration path.
         wxString fileName = Kiface().KifaceSearch().FindValidPath( global_tbl_name );
 
-        // The fallback is to create an empty global footprint table for the user to populate.
+        // The fallback is to create an empty global symbol table for the user to populate.
         if( fileName.IsEmpty() || !::wxCopyFile( fileName, fn.GetFullPath(), false ) )
         {
             SYMBOL_LIB_TABLE    emptyTable;

eeschema/symbol_lib_table.h

@@ -289,6 +289,11 @@ public:
      * set already in the environment.
      */
     static const wxString GlobalPathEnvVariableName();
+
+    static SYMBOL_LIB_TABLE& GetGlobalLibTable() { return m_globalLibTable; }
+
+private:
+    static SYMBOL_LIB_TABLE m_globalLibTable;   // There can be only one.
 };