Method FoldExpand

scintilla/src/Editor.cxx:7160–7184

}

void Editor::FoldExpand ( int line, int action, int level )
{
    bool expanding = action == SC_FOLDACTION_EXPAND;
    if ( action == SC_FOLDACTION_TOGGLE ) {
        expanding = !cs.GetExpanded ( line );
    }
    SetFoldExpanded ( line, expanding );
    if ( expanding && ( cs.HiddenLines() == 0 ) )
        // Nothing to do
    {
        return;
    }
    int lineMaxSubord = pdoc->GetLastChild ( line, level & SC_FOLDLEVELNUMBERMASK );
    line++;
    cs.SetVisible ( line, lineMaxSubord, expanding );
    while ( line <= lineMaxSubord ) {
        int levelLine = pdoc->GetLevel ( line );
        if ( levelLine & SC_FOLDLEVELHEADERFLAG ) {
            SetFoldExpanded ( line, expanding );
        }
        line++;
    }
    SetScrollBars();
    Redraw();
}

int Editor::ContractedFoldNext ( int lineStart )
{