OgreStringInterface.h

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/*
-----------------------------------------------------------------------------
This source file is part of OGRE
    (Object-oriented Graphics Rendering Engine)
For the latest info, see http://www.ogre3d.org/

Copyright (c) 2000-2012 Torus Knot Software Ltd

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
-----------------------------------------------------------------------------
*/

#ifndef __StringInterface_H__
#define __StringInterface_H__

#include "OgrePrerequisites.h"
#include "OgreString.h"
#include "OgreCommon.h"

namespace Ogre {


    enum ParameterType
    {
        PT_BOOL,
        PT_REAL,
        PT_INT,
        PT_UNSIGNED_INT,
        PT_SHORT,
        PT_UNSIGNED_SHORT,
        PT_LONG,
        PT_UNSIGNED_LONG,
        PT_STRING,
        PT_VECTOR3,
        PT_MATRIX3,
        PT_MATRIX4,
        PT_QUATERNION,
        PT_COLOURVALUE
    };

    class _OgreExport ParameterDef
    {
    public:
        String name;
        String description;
        ParameterType paramType;
        ParameterDef(const String& newName, const String& newDescription, ParameterType newType)
            : name(newName), description(newDescription), paramType(newType) {}
    };
    typedef vector<ParameterDef>::type ParameterList;

    class _OgreExport ParamCommand
    {
    public:
        virtual String doGet(const void* target) const = 0;
        virtual void doSet(void* target, const String& val) = 0;

        virtual ~ParamCommand() { }
    };
    typedef map<String, ParamCommand* >::type ParamCommandMap;

    class _OgreExport ParamDictionary
    {
        friend class StringInterface;
    protected:
        ParameterList mParamDefs;

        ParamCommandMap mParamCommands;

        ParamCommand* getParamCommand(const String& name)
        {
            ParamCommandMap::iterator i = mParamCommands.find(name);
            if (i != mParamCommands.end())
            {
                return i->second;
            }
            else
            {
                return 0;
            }
        }

        const ParamCommand* getParamCommand(const String& name) const
        {
            ParamCommandMap::const_iterator i = mParamCommands.find(name);
            if (i != mParamCommands.end())
            {
                return i->second;
            }
            else
            {
                return 0;
            }
        }
    public:
        ParamDictionary()  {}
        void addParameter(const ParameterDef& paramDef, ParamCommand* paramCmd)
        {
            mParamDefs.push_back(paramDef);
            mParamCommands[paramDef.name] = paramCmd;
        }
        const ParameterList& getParameters(void) const
        {
            return mParamDefs;
        }



    };
    typedef map<String, ParamDictionary>::type ParamDictionaryMap;
    
    class _OgreExport StringInterface 
    {
    private:
        OGRE_STATIC_MUTEX( msDictionaryMutex )

        
        static ParamDictionaryMap msDictionary;

        String mParamDictName;
        ParamDictionary* mParamDict;

    protected:
        bool createParamDictionary(const String& className)
        {
            OGRE_LOCK_MUTEX( msDictionaryMutex )

            ParamDictionaryMap::iterator it = msDictionary.find(className);

            if ( it == msDictionary.end() )
            {
                mParamDict = &msDictionary.insert( std::make_pair( className, ParamDictionary() ) ).first->second;
                mParamDictName = className;
                return true;
            }
            else
            {
                mParamDict = &it->second;
                mParamDictName = className;
                return false;
            }
        }

    public:
        StringInterface() : mParamDict(NULL) { }

        virtual ~StringInterface() {}

        ParamDictionary* getParamDictionary(void)
        {
            return mParamDict;
        }

        const ParamDictionary* getParamDictionary(void) const
        {
            return mParamDict;
        }

        const ParameterList& getParameters(void) const;

        virtual bool setParameter(const String& name, const String& value);
        virtual void setParameterList(const NameValuePairList& paramList);
        virtual String getParameter(const String& name) const
        {
            // Get dictionary
            const ParamDictionary* dict = getParamDictionary();

            if (dict)
            {
                // Look up command object
                const ParamCommand* cmd = dict->getParamCommand(name);

                if (cmd)
                {
                    return cmd->doGet(this);
                }
            }

            // Fallback
            return "";
        }
        virtual void copyParametersTo(StringInterface* dest) const
        {
            // Get dictionary
            const ParamDictionary* dict = getParamDictionary();

            if (dict)
            {
                // Iterate through own parameters
                ParameterList::const_iterator i;
            
                for (i = dict->mParamDefs.begin(); 
                i != dict->mParamDefs.end(); ++i)
                {
                    dest->setParameter(i->name, getParameter(i->name));
                }
            }


        }

        static void cleanupDictionary () ;

    };

}

#endif