/// <summary>
/// Obtains a mode from a list of atomic (already sorted) modes.
/// Used by fall back generation.
/// </summary>
public IKeyboardMode ObtainMode( IKeyboardMode[] atomicModes, int count )
{
Debug.Assert( count > 1, "Atomic modes are handled directly." );
Debug.Assert( !Array.Exists( atomicModes, delegate( IKeyboardMode mA ) { return mA.Context != this || mA.AtomicModes.Count != 1; } ),
"Modes are from this Context and they are atomic and not empty." );
StringBuilder b = new StringBuilder( atomicModes[0].ToString() );
for ( int i = 1; i < count; ++i )
{
Debug.Assert( StringComparer.Ordinal.Compare( atomicModes[i - 1].ToString(), atomicModes[i].ToString() ) < 0,
"Modes are already sorted and NO DUPLICATE exists." );
b.Append( '+' ).Append( atomicModes[i].ToString() );
}
string modes = b.ToString();
KeyboardMode m;
if ( !_modes.TryGetValue( modes, out m ) )
{
if ( atomicModes.Length != count )
{
IKeyboardMode[] subArray = new IKeyboardMode[count];
Array.Copy( atomicModes, subArray, count );
atomicModes = subArray;
}
else atomicModes = (IKeyboardMode[])atomicModes.Clone();
m = new KeyboardMode( this, modes, new CKReadOnlyListOnIList<IKeyboardMode>( atomicModes ) );
_modes.Add( modes, m );
}
return m;
}
