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/* -*-c++-*- */
/* osgEarth - Dynamic map generation toolkit for OpenSceneGraph
 * Copyright 2008-2013 Pelican Mapping
 * http://osgearth.org
 *
 * osgEarth is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>
 */
#ifndef OSGEARTHSYMBOLOGY_STYLE_H
#define OSGEARTHSYMBOLOGY_STYLE_H 1

#include <osgEarthSymbology/Common>
#include <osgEarthSymbology/Color>
#include <osgEarthSymbology/Query>
#include <osgEarthSymbology/IconSymbol>
#include <osgEarthSymbology/PointSymbol>
#include <osgEarthSymbology/LineSymbol>
#include <osgEarthSymbology/PolygonSymbol>
#include <osgEarthSymbology/MarkerSymbol>
#include <osgEarthSymbology/ModelSymbol>
#include <osgEarthSymbology/ExtrusionSymbol>
#include <osgEarthSymbology/AltitudeSymbol>
#include <osgEarthSymbology/TextSymbol>
#include <osgEarthSymbology/Skins>
#include <osgEarthSymbology/RenderSymbol>
#include <osgEarthSymbology/ResourceLibrary>

#include <osgEarth/Config>
#include <osg/Object>
#include <vector>

namespace osgEarth { namespace Symbology 
{
    /**
     * Style is an unordered collection of Symbols that describes how to render
     * geometry and other objects.
     */
    class OSGEARTHSYMBOLOGY_EXPORT Style
    {
    public:
        /** Constructs a new, empty style. */
        Style( const std::string& name = "" );

        /** Constructs a style by deserializing it from a Config. */
        Style(const Config& conf);

        /** Copy constructor. By default, duplicates all the symbols; but if you 
            specify SHALLOW_COPY, the new one will point to the same symbols. */
        Style(const Style& rhs, const osg::CopyOp& op =osg::CopyOp::DEEP_COPY_ALL ); 

        /** assignment operator */
        Style& operator = (const Style& rhs);

        /** virtual dtor */
        virtual ~Style() { }

        /** Gets the name of this style */
        const std::string& getName() const { return _name; }

        /** Sets the name of this style */
        void setName( const std::string& value ) { _name = value; }

        /** Starts with this style, merges in all the symbols from the other style, and
            returns a new style */
        Style combineWith( const Style& rhs ) const;

        /** Test whether the style is empty */
        bool empty() const { return _symbols.empty(); }

        /** Adds a symbol to the collection. */
        void addSymbol(Symbol* symbol);
        void add(Symbol* symbol) { addSymbol(symbol); }

        /** Remove a symbol from the collection */
        bool removeSymbol (Symbol* symbol);

        /** Remove a symbol by type */
        template<typename T>
        bool remove()
        {
            Symbol* s = get<T>();
            return s ? removeSymbol(s) : false;
        }

        /** Gets a typed symbol from the style (the first one found). */
        template<typename T>
        T* getSymbol()
        {
            for (SymbolList::const_iterator it = _symbols.begin(); it != _symbols.end(); ++it)
            {
                Symbol* symbol = (*it).get();
                T* s = dynamic_cast<T*>(symbol);
                if (s)
                    return s;
            }
            return 0L;
        }
        template<typename T> T* get() { return getSymbol<T>(); } // alias

        /** Whether the style contains a symbol of the template type */
        template<typename T> bool has() { return get<T>() != 0L; }
        template<typename T> const bool has() const { return get<T>() != 0L; }

        /** Gets a typed symbol from the style (the first one found) */
        template<typename T>
        const T* getSymbol() const
        {
            for (SymbolList::const_iterator it = _symbols.begin(); it != _symbols.end(); ++it)
            {
                Symbol* symbol = (*it).get();
                const T* s = dynamic_cast<const T*>(symbol);
                if (s)
                    return s;
            }
            return 0L;
        }
        template<typename T> const T* get() const { return getSymbol<T>(); } // alias

        /** Gets a typed symbol from the style (first one found), or creates/adds/returns one of 
            that type if it doesn't already exist. */
        template<typename T>
        T* getOrCreateSymbol()
        {
            T* sym = getSymbol<T>();
            if ( !sym )
            {
                sym = new T();
                addSymbol( sym );
            }
            return sym;
        }

        template<typename T> T* getOrCreate() { return getOrCreateSymbol<T>(); } // alias


        /** Serializes this object into a Config. */
        virtual Config getConfig( bool keepOrigType =true ) const;

        void mergeConfig( const Config& conf );

        void fromSLD(const Config&);
        
    protected:
        std::string                 _name;
        SymbolList                  _symbols;
        std::string                 _origType;
        std::string                 _origData;
        optional<URI>               _uri;
    };

    typedef std::vector<Style>           StyleList;
    typedef std::map<std::string, Style> StyleMap;

} } // namespace osgEarth::Symbology


#endif // OSGEARTHSYMBOLOGY_STYLE_H