Method ClearAll

scintilla/src/Editor.cxx:4253–4270

}

void Editor::ClearAll()
{
    {
        UndoGroup ug ( pdoc );
        if ( 0 != pdoc->Length() ) {
            pdoc->DeleteChars ( 0, pdoc->Length() );
        }
        if ( !pdoc->IsReadOnly() ) {
            cs.Clear();
            pdoc->AnnotationClearAll();
            pdoc->MarginClearAll();
        }
    }
    sel.Clear();
    SetTopLine ( 0 );
    SetVerticalScrollPos();
    InvalidateStyleRedraw();
}

void Editor::ClearDocumentStyle()
{