Eeschema: add delete symbol method to schematic I/O plugin.

eeschema/sch_io_mgr.h

@@ -351,6 +351,28 @@ public:
     virtual void DeleteAlias( const wxString& aLibraryPath, const wxString& aAliasName,
                               const PROPERTIES* aProperties = NULL );
 
+    /**
+     * Function DeleteSymbol
+     * deletes the entire #LIB_PART associated with @a aAliasName from the library
+     * @a aLibraryPath.
+     *
+     * @param aLibraryPath is a locator for the "library", usually a directory, file,
+     *                     or URL containing several symbols.
+     *
+     * @param aAliasName is the name of a #LIB_ALIAS associated with it's root #LIB_PART
+     *                   object to delete from the specified library.
+     *
+     * @param aProperties is an associative array that can be used to tell the library
+     *                    delete function anything special, because it can take any number
+     *                    of additional named tuning arguments that the plugin is known to
+     *                    support.  The caller continues to own this object (plugin may not
+     *                    delete it), and plugins should expect it to be optionally NULL.
+     *
+     * @throw IO_ERROR if there is a problem finding the alias or the library or deleting it.
+     */
+    virtual void DeleteSymbol( const wxString& aLibraryPath, const wxString& aAliasName,
+                               const PROPERTIES* aProperties = NULL );
+
     /**
      * Function SymbolLibCreate
      * creates a new empty footprint library at @a aLibraryPath empty.  It is an

eeschema/sch_legacy_plugin.cpp

@@ -1948,6 +1948,8 @@ public:
 
     void DeleteAlias( const wxString& aAliasName );
 
+    void DeleteSymbol( const wxString& aAliasName );
+
     wxDateTime GetLibModificationTime();
 
     bool IsFile( const wxString& aFullPathAndFileName ) const;
@@ -3237,6 +3239,25 @@ void SCH_LEGACY_PLUGIN_CACHE::DeleteAlias( const wxString& aAliasName )
 }
 
 
+void SCH_LEGACY_PLUGIN_CACHE::DeleteSymbol( const wxString& aAliasName )
+{
+    LIB_ALIAS_MAP::iterator it = m_aliases.find( aAliasName );
+
+    if( it == m_aliases.end() )
+        THROW_IO_ERROR( wxString::Format( _( "library %s does not contain an alias %s" ),
+                                          m_libFileName.GetFullName(), aAliasName ) );
+
+    LIB_ALIAS*  alias = it->second;
+    LIB_PART*   part = alias->GetPart();
+
+    wxArrayString aliasNames = part->GetAliasNames();
+
+    // Deleting all of the aliases deletes the symbol from the library.
+    for( size_t i = 0;  i < aliasNames.Count(); i++ )
+        DeleteAlias( aliasNames[i] );
+}
+
+
 void SCH_LEGACY_PLUGIN::cacheLib( const wxString& aLibraryFileName )
 {
     if( !m_cache || !m_cache->IsFile( aLibraryFileName ) || m_cache->IsFileChanged() )
@@ -3323,3 +3344,14 @@ void SCH_LEGACY_PLUGIN::DeleteAlias( const wxString& aLibraryPath, const wxStrin
 
     m_cache->DeleteAlias( aAliasName );
 }
+
+
+void SCH_LEGACY_PLUGIN::DeleteSymbol( const wxString& aLibraryPath, const wxString& aAliasName,
+                                      const PROPERTIES* aProperties )
+{
+    m_props = aProperties;
+
+    cacheLib( aLibraryPath );
+
+    m_cache->DeleteSymbol( aAliasName );
+}

eeschema/sch_legacy_plugin.h

@@ -93,6 +93,9 @@ public:
     void DeleteAlias( const wxString& aLibraryPath, const wxString& aAliasName,
                       const PROPERTIES* aProperties = NULL ) override;
 
+    void DeleteSymbol( const wxString& aLibraryPath, const wxString& aAliasName,
+                       const PROPERTIES* aProperties = NULL ) override;
+
     // Temporary for testing using PART_LIB instead of SCH_PLUGIN.
     void TransferCache( PART_LIB& aTarget ) override;
 

eeschema/sch_plugin.cpp

@@ -99,6 +99,14 @@ void SCH_PLUGIN::DeleteAlias( const wxString& aLibraryPath, const wxString& aAli
 }
 
 
+void SCH_PLUGIN::DeleteSymbol( const wxString& aLibraryPath, const wxString& aAliasName,
+                               const PROPERTIES* aProperties )
+{
+    // not pure virtual so that plugins only have to implement subset of the SCH_PLUGIN interface.
+    not_implemented( this, __FUNCTION__ );
+}
+
+
 void SCH_PLUGIN::SymbolLibCreate( const wxString& aLibraryPath, const PROPERTIES* aProperties )
 {
     // not pure virtual so that plugins only have to implement subset of the SCH_PLUGIN interface.