Responding to copy and paste

CodeEditor.m

- (BOOL) canPerformAction:(SEL)action withSender:(id)sender
{
    switch ( menuState )
    {
        case JAMCodeEditorMenuStateHidden:
        {
            if( self.selectedRange.length == 0 )
            {
                if( action == @selector(select:) ||
                    action == @selector(selectAll:) ||
                    action == @selector(paste:) )
                {
                    return YES;
                }
            }
            else
            {
                if( action == @selector(cut:) ||
                    action == @selector(copy:) ||
                    action == @selector(paste:) )
                {
                    return YES;
                }
            }
            return NO;
        }
        case JAMCodeEditorMenuStateCaret:
        {
            if( action == @selector(select:) ||
                action == @selector(selectAll:) ||
                action == @selector(paste:) )
            {
                return YES;
            }
        }   break;
        case JAMCodeEditorMenuStateSelection:
        {
            if( action == @selector(cut:) ||
                action == @selector(copy:) ||
                action == @selector(paste:) )
            {
                return YES;
            }
        }   break;

        default:
            break;
    }
  
    return NO;
}

- (void) copy:(id)sender
{
    //Get selected text
    NSString *text = self.selectedText;

    if( text )
    {
        [[UIPasteboard generalPasteboard] setString:text];
    }
}