libosgearth-dev 2.7.0+dfsg-2+b3 / usr / include / osgEarth / XmlUtils

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/* -*-c++-*- */
/* osgEarth - Dynamic map generation toolkit for OpenSceneGraph
 * Copyright 2015 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 OSGEARTH_XML_UTILS_H
#define OSGEARTH_XML_UTILS_H

#include <osgEarth/Common>
#include <osgEarth/Config>
#include <osgEarth/StringUtils>
#include <osgEarth/URI>
#include <osg/Referenced>
#include <osg/ref_ptr>
#include <string>
#include <vector>
#include <map>
#include <stack>

// XML support utilites.

namespace osgEarth
{
    class OSGEARTH_EXPORT XmlNode : public osg::Referenced
    {
    public:
        XmlNode();
        
        virtual ~XmlNode() { }

        virtual bool isElement() const =0;

        virtual bool isText() const =0;
    };

    typedef std::vector<osg::ref_ptr<XmlNode> > XmlNodeList;

    typedef std::map<std::string,std::string> XmlAttributes;

    class OSGEARTH_EXPORT XmlElement : public XmlNode
    {
    public:
        XmlElement( const std::string& name );
        
        XmlElement( const std::string& name, const XmlAttributes& attrs );

        XmlElement( const Config& conf );
        
        virtual ~XmlElement() { }

        const std::string& getName() const;

        void setName( const std::string& name );

        XmlAttributes& getAttrs();
        
        const XmlAttributes& getAttrs() const;

        const std::string& getAttr( const std::string& key ) const;

        XmlNodeList& getChildren();
        
        const XmlNodeList& getChildren() const;
        
        XmlElement* getSubElement( const std::string& name ) const;
        
        XmlNodeList getSubElements( const std::string& name ) const;

        /**
         * Finds the first element matching the name. This will match the
         * current element (this), or the first matching element in this
         * nodes subhierarchy.
         */
        const XmlElement* findElement(const std::string& name) const;
        
        std::string getText() const;
        
        std::string getSubElementText( const std::string& tag ) const;

        void addSubElement(const std::string& tag, const std::string& text);

        void addSubElement(const std::string& tag, const Properties& attrs, const std::string& text);

        virtual Config getConfig() const;

    public: // XmlNode
        virtual bool isElement() const { return true; }

        virtual bool isText() const { return false; }

    private:
        std::string name;
        XmlAttributes attrs;
        XmlNodeList children;        
    };

    typedef std::vector<osg::ref_ptr<XmlElement> > XmlElementList;
    
    typedef std::stack<osg::ref_ptr<XmlElement> > XmlElementStack;
    
    typedef std::stack<XmlElement*> XmlElementNoRefStack;

    class OSGEARTH_EXPORT XmlText : public XmlNode
    {
    public:
        XmlText( const std::string& value );
        
        virtual ~XmlText() { }

        const std::string& getValue() const;

    public: // XmlNode
        virtual bool isElement() const { return false; }

        virtual bool isText() const { return true; }
        
    private:
        std::string value;
    };  
    
    class OSGEARTH_EXPORT XmlDocument : public XmlElement
    {
    public:
        XmlDocument();

        XmlDocument( const Config& conf );
        
        virtual ~XmlDocument();

        static XmlDocument* load( const std::string& location, const osgDB::Options* dbOptions =0L );

        static XmlDocument* load( const URI& uri, const osgDB::Options* dbOptions =0L );
        
        static XmlDocument* load( std::istream& in, const URIContext& context =URIContext() );

        void store( std::ostream& out ) const;

        const std::string& getName() const;

        virtual Config getConfig() const;

    protected:
        URI                      _sourceURI;
        std::string              _name;
        osg::ref_ptr<XmlElement> _root;
    };
}

#endif // OSGEARTH_XML_UTILS_H

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