GtkTextIter end;
gtk_text_buffer_get_end_iter(text_buffer,&end );
gchar *text = gtk_text_buffer_get_text(text_buffer,&line,&end,TRUE);
GtkTextIter end;
gtk_text_buffer_get_end_iter(text_buffer,&end );
gchar *text = gtk_text_buffer_get_text(text_buffer,&line,&end,TRUE);