Eeschema: fix a Unicode/UTF8 management when pasting items from Clipboard.

Copy to clipboard save items (using S expr description) using wide strings
(not UTF8 encoding).
But Paste from clipboard was not converting the wide string to UTF8 string
when getting the stored data to send it as std::string to the S expr reader.

Fixes #6449
https://gitlab.com/kicad/code/kicad/issues/6449

common/tool/tool_manager.cpp

@@ -971,11 +971,13 @@ void TOOL_MANAGER::ScheduleContextMenu( TOOL_BASE* aTool, ACTION_MENU* aMenu,
 }
 
 
-bool TOOL_MANAGER::SaveClipboard( const std::string& aText )
+bool TOOL_MANAGER::SaveClipboard( const std::string& aTextUTF8 )
 {
     if( wxTheClipboard->Open() )
     {
-        wxTheClipboard->SetData( new wxTextDataObject( wxString( aText.c_str(), wxConvUTF8 ) ) );
+        // Store the UTF8 string as unicode string in clipboard:
+        wxTheClipboard->SetData( new wxTextDataObject( wxString( aTextUTF8.c_str(),
+                                                       wxConvUTF8 ) ) );
         wxTheClipboard->Close();
 
         return true;
@@ -985,7 +987,7 @@ bool TOOL_MANAGER::SaveClipboard( const std::string& aText )
 }
 
 
-std::string TOOL_MANAGER::GetClipboard() const
+std::string TOOL_MANAGER::GetClipboardUTF8() const
 {
     std::string result;
 
@@ -997,7 +999,9 @@ std::string TOOL_MANAGER::GetClipboard() const
             wxTextDataObject data;
             wxTheClipboard->GetData( data );
 
-            result = data.GetText().mb_str();
+            // The clipboard is expected containing a unicode string, so return it
+            // as UTF8 string
+            result = data.GetText().utf8_str();
         }
 
         wxTheClipboard->Close();

eeschema/tools/lib_edit_tool.cpp

@@ -668,8 +668,8 @@ int LIB_EDIT_TOOL::Paste( const TOOL_EVENT& aEvent )
     if( !part || part->IsAlias() )
         return 0;
 
-    std::string         text = m_toolMgr->GetClipboard();
-    STRING_LINE_READER  reader( text, "Clipboard" );
+    std::string         text_utf8 = m_toolMgr->GetClipboardUTF8();
+    STRING_LINE_READER  reader( text_utf8, "Clipboard" );
     LIB_PART*           newPart;
 
     try
@@ -681,7 +681,7 @@ int LIB_EDIT_TOOL::Paste( const TOOL_EVENT& aEvent )
         // If it's not a part then paste as text
         newPart = new LIB_PART( "dummy_part" );
         LIB_TEXT* newText = new LIB_TEXT( newPart );
-        newText->SetText( text );
+        newText->SetText( wxString::FromUTF8( text_utf8 ) );
         newPart->AddDrawItem( newText );
     }
 

eeschema/tools/sch_editor_control.cpp

@@ -1353,7 +1353,7 @@ int SCH_EDITOR_CONTROL::Paste( const TOOL_EVENT& aEvent )
     }
 
     EE_SELECTION_TOOL* selTool = m_toolMgr->GetTool<EE_SELECTION_TOOL>();
-    std::string        text = m_toolMgr->GetClipboard();
+    std::string        text = m_toolMgr->GetClipboardUTF8();
 
     if( text.empty() )
         return 0;

include/tool/tool_manager.h

@@ -381,16 +381,19 @@ public:
 
     /**
      * Stores an information to the system clipboard.
-     * @param aText is the information to be stored.
+     * @param aText is the information to be stored, expected UTF8 encoding.
+     * the text will be stored as Unicode string (not stored as UTF8 string)
      * @return False if error occurred.
      */
-    bool SaveClipboard( const std::string& aText );
+    bool SaveClipboard( const std::string& aTextUTF8 );
 
     /**
      * Returns the information currently stored in the system clipboard. If data stored in the
      * clipboard is in non-text format, empty string is returned.
+     * Note also the clipboard is expected containing unicode chars, not only ASCII7 chars.
+     * The returned string is UTF8 encoded
      */
-    std::string GetClipboard() const;
+    std::string GetClipboardUTF8() const;
 
     /**
      * Returns the view controls settings for the current tool or the general settings if there is

pagelayout_editor/tools/pl_edit_tool.cpp

@@ -477,7 +477,7 @@ int PL_EDIT_TOOL::Paste( const TOOL_EVENT& aEvent )
 {
     PL_SELECTION&  selection = m_selectionTool->GetSelection();
     WS_DATA_MODEL& model = WS_DATA_MODEL::GetTheInstance();
-    std::string    sexpr = m_toolMgr->GetClipboard();
+    std::string    sexpr = m_toolMgr->GetClipboardUTF8();
 
     m_selectionTool->ClearSelection();