PropFlags.h

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// 
//   Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
//   Free Software Foundation, Inc
// 
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 3 of the License, or
// (at your option) any later version.
// 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// 
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

#ifndef GNASH_AS_PROP_FLAGS_H
#define GNASH_AS_PROP_FLAGS_H

#include <ostream>
#include <cstdint>

namespace gnash {

class PropFlags
{
public:

        enum Flags {

                dontEnum        = 1 << 0, // 1

                dontDelete      = 1 << 1, // 2

                readOnly        = 1 << 2, // 4

                onlySWF6Up      = 1 << 7, // 128

                ignoreSWF6      = 1 << 8, // 256

                onlySWF7Up      = 1 << 10, // 1024

                onlySWF8Up      = 1 << 12, // 4096

                onlySWF9Up      = 1 << 13 // 8192

        };

        PropFlags()
        :
        _flags(0)
        {
        }

        PropFlags(const bool read_only, const bool dont_delete,
            const bool dont_enum)
                :
                _flags(((read_only) ? readOnly : 0) |
                                ((dont_delete) ? dontDelete : 0) |
                                ((dont_enum) ? dontEnum : 0))
        {
        }

        PropFlags(std::uint16_t flags)
                :
        _flags(flags)
        {
        }

        bool operator==(const PropFlags& o) const {
                return (_flags == o._flags);
        }

        bool operator!=(const PropFlags& o) const {
        return !(*this == o);
        }

    template<Flags f>
    bool test() const {
        return (_flags & f);
    }

        bool get_visible(int swfVersion) const {
                if (test<onlySWF6Up>() && swfVersion < 6) return false;
                if (test<ignoreSWF6>() && swfVersion == 6) return false;
                if (test<onlySWF7Up>() && swfVersion < 7) return false;
                if (test<onlySWF8Up>() && swfVersion < 8) return false;
                if (test<onlySWF9Up>() && swfVersion < 9) return false;
                return true;
        }

        void clear_visible(int swfVersion) {
                if (swfVersion == 6) {
                        // version 6, so let's forget onlySWF7Up flag!
                        // we will still set the value though, even if that flag is set
                        _flags &= ~(onlySWF6Up|ignoreSWF6|onlySWF8Up|onlySWF9Up);
                }
                else {
                        _flags &= ~(onlySWF6Up|ignoreSWF6|onlySWF7Up|onlySWF8Up|onlySWF9Up);
                }
        }

    std::uint16_t get_flags() const { return _flags; }

        bool set_flags(std::uint16_t setTrue, std::uint16_t setFalse = 0) {
                _flags &= ~setFalse;
                _flags |= setTrue;
                return true;
        }

private:

    std::uint16_t _flags;

};

inline std::ostream&
operator<<(std::ostream& os, const PropFlags& fl)
{
        os << "(";
        if (fl.test<PropFlags::readOnly>()) os << " readonly";
        if (fl.test<PropFlags::dontDelete>()) os << " nodelete";
        if (fl.test<PropFlags::dontEnum>()) os << " noenum";
        os << " )";
        return os;
}



} // namespace gnash

#endif // GNASH_AS_PROP_FLAGS_H