document.h

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// © Copyright 2010 - 2016 BlackTopp Studios Inc.
/* This file is part of The Mezzanine Engine.

    The Mezzanine Engine 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.

    The Mezzanine Engine 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 The Mezzanine Engine.  If not, see <http://www.gnu.org/licenses/>.
*/
/* The original authors have included a copy of the license specified above in the
   'Docs' folder. See 'gpl.txt'
*/
/* We welcome the use of the Mezzanine engine to anyone, including companies who wish to
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   However there are some practical restrictions, so if your project involves
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*/
/*
 *
 * Software, Files, Libraries and all other items referenced in this clause refers only
 * to the contents of this file and associated documentation.
 *
 * Pugixml parser - version 1.0
 * --------------------------------------------------------
 * Copyright © 2006-2012, by Arseny Kapoulkine (arseny.kapoulkine@gmail.com)
 * Report bugs and download new versions at http://pugixml.org/
 *
 * This library is distributed under the MIT License. See notice at the end
 * of this file.
 *
 * This work is based on the pugxml parser, which is:
 * Copyright © 2003, by Kristen Wegner (kristen@tima.net)
 */
#ifndef _xmldocument_h
#define _xmldocument_h

/// @file
/// @brief The definition of the XML::Document Class

#include "datatypes.h"

#include "XML/xmlenumerations.h"
#include "XML/parseresult.h"
#include "XML/node.h"
#include "XML/writer.h"


#ifndef SWIG
#include "Resource/datastream.h"
#endif



namespace Mezzanine
{
    namespace XML
    {
        /// @brief The root node of any xml hierarchy is a @ref Document
        /// @details This has all the same features as a Node and include a few features for saving, loading, streaming
        /// and to a limited degree managing the document declaration.
        class MEZZ_LIB Document: public Node
        {
            private:
                /// @internal
                /// @brief Almost all of the XML Text is stored in this.
                Char8* _buffer;

                /// @internal
                /// @brief Used when initializining for storing parts of pages
                char _memory[192];


                /// @brief Private copy constructor to make this non-copyable.
                Document(const Document&);

                /// @brief Private assignment operator enforces non-assignability.
                const Document& operator=(const Document&);

                /// @internal
                /// @brief Performs all required memory allocation for construction.
                void create();

                /// @internal
                /// @brief De-allocates Every allocated durign normal use and the Document::create funciton.
                void destroy();

                /// @internal
                /// @brief The implementation for the different functions that load rom buffers.
                /// @param contents The Buffer
                /// @param size The size of the buffer in bytes
                /// @param options A bitmask of parsing options as declared in @ref xmlenumerations.h
                /// @param DocumentEncoding Value used to determine if we need to guess encoding or use this or a variant of this.
                /// @param is_mutable can we changethe buffer or do we need to write changes elsewhere
                /// @param own Does the XML system own this now?
                ParseResult LoadBufferImpl(void* contents, size_t size, unsigned int options, Encoding DocumentEncoding, bool is_mutable, bool own);

            public:
                /// @brief Creates an empty document with just a root Node
                Document();

                /// @brief Tears down a document, and incidentally invalidates all Node and Attribute handles to this document.
                virtual ~Document();

                /// @brief Removes all nodes, leaving the empty document.
                void Reset();

                /// @brief Removes all nodes, then copies the entire contents of the specified document
                /// @param proto The Document to copy.
                void Reset(const Document& proto);

                #ifndef SWIG_SAFE

                /// @brief Load XML from a stream.
                /// @param stream An std::istream which has xml text in it.
                /// @param options A bitset of parse options that should be set using the Parse variables. This Defaults to ParseDefault.
                /// @param DocumentEncoding What kind of text is in the stream, this defaults to Encoding::EncodingAuto
                /// @return A ParseResult that stores the the outcome of attempting to load the document.
                /// @note Not available in the 'Safe' scripting languages because of the file access it could provide.
                ParseResult Load(std::basic_istream<char, std::char_traits<char> >& stream, unsigned int options = ParseDefault, Encoding DocumentEncoding = EncodingAuto);

                /// @brief Load XML from a wide stream.
                /// @param stream An std::basic_istream which has xml wide character text in it.
                /// @param options A bitset of parse options that should be set using the Parse variables. This Defaults to ParseDefault.
                /// @return A ParseResult that stores the the outcome of attempting to load the document.
                /// @note Not available in the 'Safe' scripting languages because of the file access it could provide.
                ParseResult Load(std::basic_istream<wchar_t, std::char_traits<wchar_t> >& stream, unsigned int options = ParseDefault);
                #endif

                /// @brief Load XML from a C-style string.
                /// @param contents A pointer to the Null terminated array of Characters.
                /// @param options A bitset of parse options that should be set using the Parse variables. This Defaults to ParseDefault.
                /// @return A ParseResult that stores the the outcome of attempting to load the document.
                /// @note The only Load method available in the 'Safe' scripting languages.
                ParseResult Load(const Char8* contents, unsigned int options = ParseDefault);

                #ifndef SWIG_SAFE
                // Load document from file
                /// @brief Load document from file
                /// @param Path An c-style char array that contains the path and filename of the xml document to load.
                /// @param options A bitset of parse options that should be set using the Parse variables. This Defaults to ParseDefault.
                /// @param DocumentEncoding What kind of text is in the stream, this defaults to Encoding::EncodingAuto
                /// @return A ParseResult that stores the the outcome of attempting to load the document.
                /// @note Not available in the 'Safe' scripting languages because of the file access it could provide.
                ParseResult LoadFile(const char* Path, unsigned int options = ParseDefault, Encoding DocumentEncoding = EncodingAuto);

                /// @brief Load document from file
                /// @param Path An c-style wide char array that contains the path and filename of the xml document to load.
                /// @param options A bitset of parse options that should be set using the Parse variables. This Defaults to ParseDefault.
                /// @param DocumentEncoding What kind of text is in the stream, this defaults to Encoding::EncodingAuto
                /// @return A ParseResult that stores the the outcome of attempting to load the document.
                /// @note Not available in the 'Safe' scripting languages because of the file access it could provide.
                ParseResult LoadFile(const wchar_t* Path, unsigned int options = ParseDefault, Encoding DocumentEncoding = EncodingAuto);
                #endif

                /// @brief Load document from buffer. Copies/converts the buffer, so it may be deleted or changed after the function returns.
                /// @param contents A pointer to buffer containing the xml document to be parsed, that will remain unchanged.
                /// @param size The size of the buffer.
                /// @param options A bitset of parse options that should be set using the Parse variables. This Defaults to ParseDefault.
                /// @param DocumentEncoding What kind of text is in the stream, this defaults to Encoding::EncodingAuto
                /// @return A ParseResult that stores the the outcome of attempting to load the document.
                /// @note All buffer loading Methods of the XML::Document are made available to all scripting languages libraries.
                ParseResult LoadBuffer(const void* contents, size_t size, unsigned int options = ParseDefault, Encoding DocumentEncoding = EncodingAuto);

                // Load document from buffer, using the buffer for in-place parsing (the buffer is modified and used for storage of document data).
                // You should ensure that buffer data will persist throughout the document's lifetime, and free the buffer memory manually once document is destroyed.
                /// @brief Load document from buffer, using the buffer for in-place parsing (the buffer is modified and used for storage of document data).
                /// @details You should ensure that buffer data will persist throughout the documents lifetime, and free the buffer memory manually once document is destroyed.
                /// @param contents A pointer to buffer containing the xml document to be parsed, that must remain for the lifecycle of the XML::Document.
                /// @param size The size of the buffer.
                /// @param options A bitset of parse options that should be set using the Parse variables. This Defaults to ParseDefault.
                /// @param DocumentEncoding What kind of text is in the stream, this defaults to Encoding::EncodingAuto
                /// @return A ParseResult that stores the the outcome of attempting to load the document.
                /// @note All buffer loading Methods of the XML::Document are made available to all scripting languages libraries.
                ParseResult LoadBufferInplace(void* contents, size_t size, unsigned int options = ParseDefault, Encoding DocumentEncoding = EncodingAuto);

                // Load document from buffer, using the buffer for in-place parsing (the buffer is modified and used for storage of document data).
                // You should allocate the buffer with pugixml allocation function; document will free the buffer when it is no longer needed (you can't use it anymore).
                /// @brief Load document from buffer, using the buffer for in-place parsing (the buffer is modified and used for storage of document data).
                /// @details You should allocate the buffer with pugixml allocation function; XML::Document will free the buffer when it is no longer needed (you can not use it anymore).
                /// @param contents A pointer to buffer containing the xml document to be parsed.
                /// @param size The size of the buffer.
                /// @param options A bitset of parse options that should be set using the Parse variables. This Defaults to ParseDefault.
                /// @param DocumentEncoding What kind of text is in the stream, this defaults to Encoding::EncodingAuto.
                /// @return A ParseResult that stores the the outcome of attempting to load the document.
                /// @note All buffer loading Methods of the XML::Document are made available to all scripting languages libraries.
                ParseResult LoadBufferInplaceOwn(void* contents, size_t size, unsigned int options = ParseDefault, Encoding DocumentEncoding = EncodingAuto);

                #ifndef SWIG_SAFE

                /// @brief Save XML document to WriterInstance.
                /// @param WriterInstance The Writer that will be used to output the xml text.
                /// @param indent The Character(s) used to represent a tab in the output, this defaults to one tab character.
                /// @param flags The output format flags, this is a bitfield that defaults to XML::FormatDefault.
                /// @param DocumentEncoding What kind of text is in the stream, this defaults to Encoding::EncodingAuto.
                /// @note Not available in the 'Safe' scripting languages because of the file access it could provide.
                void Save(Writer& WriterInstance, const Char8* indent = "\t", unsigned int flags = FormatDefault, Encoding DocumentEncoding = EncodingAuto) const;

                /// @brief Save XML document to a stream of characters.
                /// @param stream The output stream of wide characters to send the XML document to.
                /// @param indent The Character(s) used to represent a tab in the output, this defaults to one tab character.
                /// @param flags The output format flags, this is a bitfield that defaults to XML::FormatDefault.
                /// @param DocumentEncoding The Type of encoding to use when saving the document.
                /// @note Not available in the 'Safe' scripting languages because of the file access it could provide.
                void Save(std::basic_ostream<char, std::char_traits<char> >& stream, const Char8* indent = "\t", unsigned int flags = FormatDefault, Encoding DocumentEncoding = EncodingAuto) const;

                /// @brief Save XML document to a stream of wide characters.
                /// @param stream The output stream of wide characters to send the XML document to.
                /// @param indent The Character(s) used to represent a tab in the output, this defaults to one tab character.
                /// @param flags The output format flags, this is a bitfield that defaults to XML::FormatDefault.
                /// @note Not available in the 'Safe' scripting languages because of the file access it could provide.
                void Save(std::basic_ostream<wchar_t, std::char_traits<wchar_t> >& stream, const Char8* indent = "\t", unsigned int flags = FormatDefault) const;

                /// @brief Save XML to file.
                /// @param Path A c-style array of chars that contain the filename (and any path) of the file to be output.
                /// @param indent The Character(s) used to represent a tab in the output, this defaults to one tab character.
                /// @param flags The output format flags, this is a bitfield that defaults to XML::FormatDefault.
                /// @param DocumentEncoding What kind of text is in the stream, this defaults to Encoding::EncodingAuto.
                /// @return False if the target file could not be opened for writing
                /// @note Not available in the 'Safe' scripting languages because of the file access it could provide.
                bool SaveFile(const char* Path, const Char8* indent = "\t", unsigned int flags = FormatDefault, Encoding DocumentEncoding = EncodingAuto) const;

                /// @brief Save XML to file.
                /// @param Path A c-style array of wide chars that contain the filename (and any path) of the file to be output.
                /// @param indent The Character(s) used to represent a tab in the output, this defaults to one tab character.
                /// @param flags The output format flags, this is a bitfield that defaults to XML::FormatDefault.
                /// @param DocumentEncoding What kind of text is in the stream, this defaults to Encoding::EncodingAuto.
                /// @return False if the target file could not be opened for writing
                /// @note Not available in the 'Safe' scripting languages because of the file access it could provide.
                bool SaveFile(const wchar_t* Path, const Char8* indent = "\t", unsigned int flags = FormatDefault, Encoding DocumentEncoding = EncodingAuto) const;
                #endif

                // Get document element
                /// @brief Get document element
                /// @return An XML::Node that is the root element of the xml Document
                Node DocumentElement() const;
        };

    }
} // /namespace Mezzanine



#endif // Include guard


/*
 *
 * Software, Files, Libraries and all other items referenced in this clause refers only
 * to the contents of this file and associated documentation.
 *
 * Copyright © 2006-2012 Arseny Kapoulkine
 *
 * 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.
 */

---

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