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/***********************************************************************
    filename:   CEGUIXMLSerializer.h
    created:    Thue May 16 2006
    author:     Olivier Delannoy 
*************************************************************************/
/***************************************************************************
 *   Copyright (C) 2004 - 2006 Paul D Turner & The CEGUI Development Team
 *
 *   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 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 _CEGUIXMLSerializer_h_
#define _CEGUIXMLSerializer_h_
#include "CEGUIBase.h"
#include "CEGUIString.h"
#include <vector>

#if defined(_MSC_VER)
#	pragma warning(push)
#	pragma warning(disable : 4251)
#endif

// Start of CEGUI namespace section
namespace CEGUI
{
    /*!
    \brief 
         Class used to create XML Document. 

    This class hides the complexity of formatting valid XML files. The
    class provides automatic substitution of entities, XML indenting
    in respect of the spaces. It does not contains any codes specific
    to CEGUI taking appart the CEGUI::String class. The following
    example show the code needed to exports parts of an XML document
    similar to what can be found in a layout.
    
    @code 
    #include <iostream>
    #include <CEGUI/XMLSerializer.h> 
    
    int main() 
    {
       // Create an encoder that outputs its result on standard output 
       XMLSerializer xml(std::cout, 4);
       xml.openTag("Window")
          .attribute("Type", "TaharezLook/StaticText")
          .attribute("Name", "Test")
          .openTag("Property")
          .attribute("Name", "Text")
          .text("This is the static text to be displayed")
          .closeTag()
          .openTag("Window")
          .attribute("Name", "Button")
          .attribute("Type", "Vanilla/Button")
          .openTag("Property")
          .attribute("Name", "Text")
          .attribute("Value", "Push me")
          .closeTag()
          .closeTag()
          .closeTag();
          
       if (xml)
       {
           std::cout << "XML Exported successfully" << std::endl;
       }
       return 0;
    }
    @endcode
    */
    class CEGUIEXPORT XMLSerializer
    {
    public:
        /*!
        \brief XMLSerializer constructor 
         
        \param out The stream to use to export the result 
         
         
        \param indentSpace The indentation level (0 to disable indentation)
        */
        XMLSerializer(OutStream& out, size_t indentSpace = 4);
        
        /*! 
        \brief XMLSerializer destructor
        */ 
        virtual ~XMLSerializer(void);  

        /*!
        \brief Start a new tag in the xml document.  
        
        \param name The name of the tag 
        
        \return 
            A reference to the current object for chaining operation 
        */
        XMLSerializer& openTag(const String& name);
        /*!
        \brief Close the current tag. 
        
        \return 
            A reference to the current object for chaining operation 
        */
        XMLSerializer& closeTag(void);
        /*!
        \brief After an opening tag you can populate attribute list with this function 
        
        \param name The name of the attribute 
        
        \param value The value of the attribute
        
        \return 
            A reference to the current object for chaining operation 
        */
        XMLSerializer& attribute(const String& name, const String& value);
        /*! 
        \brief Create a text node 
        
        \param text the content of the node 
        
        \return 
            A reference to the current object for chaining operation 
        */
        XMLSerializer& text(const String& text);
        
        /*! 
        \brief 
        report the nimber of tags created in the document 

        \return 
            return the number of tag created in the document 
        */
        unsigned int getTagCount() const;
        /*!
        \brief Check wether the XML Serializer status is valid 
        
        \return 
            True if all previous operations where successfull 
        */
        operator bool () const
        {
            return false == d_error;
        }
        /*!
        \brief Check wether the XML Serializer status is invalid 
        
        \return 
            True if one operations failed
        */ 
        bool operator!() const
        {
            return false != d_error;
        }
        
    protected:
    private:
        bool d_error; //!< Store the status of the serializer 
        unsigned int d_tagCount; //!<Return the number of tag in the document 
        size_t d_depth; //!< Store the current depth for indentation purpose 
        size_t d_indentSpace; //!< Store the number of space use for indenting 
        bool d_needClose; //!< Store whether the next operation need to close the tag or not 
        bool d_lastIsText; //!< Store whether the last operation was a text node or not 
        OutStream& d_stream; //!< A reference to the stream object use
        std::vector<String> d_tagStack; //!< Store the tag stack for correct closing of the tags. 
  
        /*!
        \brief put padding in the stream before line data 
        */
        void indentLine();
        /*!
        \brief convert special char to there corresponding entity in text data. 
        */
        static String convertEntityInText(const String& text);
        /*!
        \brief convert special char into entities including line ending for use in attributes.
        */
        static String convertEntityInAttribute(const String& attributeValue);
        

        // Disabled operation 
        XMLSerializer(const XMLSerializer& obj);
        // Disabled operation 
        XMLSerializer& operator=(const XMLSerializer& obj);  
    };
}

#if defined(_MSC_VER)
#   pragma warning(pop)
#endif

#endif
CEGUIXMLSerializer.h
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