Node.h

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//
// Copyright (c) 2009, Markus Rickert
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice,
//   this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright notice,
//   this list of conditions and the following disclaimer in the documentation
//   and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//
 
#ifndef RL_XML_NODE_H
#define RL_XML_NODE_H
 
#include <cstring>
#include <string>
#include <boost/shared_array.hpp>
#include <libxml/parser.h>
#include <libxml/uri.h>
#include <libxml/xinclude.h>
 
#include "Attribute.h"
#include "Exception.h"
#include "Namespace.h"
 
namespace rl
{
    namespace xml
    {
        class Node
        {
        public:
            explicit Node(::xmlNodePtr node) :
                node(node)
            {
            }
            
            explicit Node(const ::std::string& name) :
                node(
                    ::xmlNewNode(
                        nullptr,
                        reinterpret_cast<const ::xmlChar*>(name.c_str())
                    )
                )
            {
            }
            
            ~Node()
            {
                if (nullptr != this->node && nullptr == this->node->doc)
                {
                    ::xmlFree(this->node);
                }
            }
            
            static Node Text(const ::std::string& content)
            {
                return Node(::xmlNewText(reinterpret_cast<const ::xmlChar*>(content.c_str())));
            }
            
            Node addChild(const Node& node)
            {
                return Node(::xmlAddChild(this->node, node.get()));
            }
            
            Node addNextSibling(const Node& node)
            {
                return Node(::xmlAddNextSibling(this->node, node.get()));
            }
            
            Node addPrevSibling(const Node& node)
            {
                return Node(::xmlAddPrevSibling(this->node, node.get()));
            }
            
            Node addSibling(const Node& node)
            {
                return Node(::xmlAddSibling(this->node, node.get()));
            }
            
            ::xmlNodePtr get() const
            {
                return this->node;
            }
            
            unsigned long getChildElementCount() const
            {
                return ::xmlChildElementCount(this->node);
            }
            
            ::std::string getContent() const
            {
                ::boost::shared_array< ::xmlChar> content(
                    ::xmlNodeGetContent(this->node),
                     ::xmlFree
                );
                
                return nullptr != content.get() ? reinterpret_cast<char*>(content.get()) : ::std::string();
            }
            
            Node getFirstChild() const
            {
                return Node(this->node->children);
            }
            
            Attribute getFirstProperty() const
            {
                return Attribute(this->node->properties);
            }
            
            unsigned short int getLine() const
            {
                return this->node->line;
            }
            
            ::std::string getLocalPath(const ::std::string& uri) const
            {
                ::boost::shared_array< ::xmlChar> absolute(
                    ::xmlBuildURI(
                        reinterpret_cast<const ::xmlChar*>(uri.c_str()),
                        ::xmlNodeGetBase(this->node->doc, this->node)
                    ),
                    ::xmlFree
                );
                
                ::boost::shared_array<char> unescaped(
                    ::xmlURIUnescapeString(
                        reinterpret_cast<char*>(absolute.get()),
                        0,
                        nullptr
                    ),
                    ::xmlFree
                );
                
                char* path;
                
                if (0 == ::strncmp(unescaped.get(), "file://localhost/", 17))
                {
#ifdef WIN32
                    path = &unescaped.get()[17];
#else // WIN32
                    path = &unescaped.get()[16];
#endif // WIN32
                }
                else if (0 == ::strncmp(unescaped.get(), "file:///", 8))
                {
#ifdef WIN32
                    path = &unescaped.get()[8];
#else // WIN32
                    path = &unescaped.get()[7];
#endif // WIN32
                }
                else if (0 == ::strncmp(unescaped.get(), "file:/", 6))
                {
#ifdef WIN32
                    path = &unescaped.get()[6];
#else // WIN32
                    path = &unescaped.get()[5];
#endif // WIN32
                }
                else
                {
                    path = unescaped.get();
                }
                
                return nullptr != path ? path : ::std::string();
            }
            
            ::std::string getName() const
            {
                return nullptr != this->node->name ? reinterpret_cast<const char*>(this->node->name) : ::std::string();
            }
            
            Namespace getNamespace() const
            {
                return Namespace(this->node->ns);
            }
            
            Node getNext() const
            {
                return Node(this->node->next);
            }
            
            Node getParent() const
            {
                return Node(this->node->parent);
            }
            
            Node getPrevious() const
            {
                return Node(this->node->prev);
            }
            
            ::std::string getProperty(const ::std::string& name) const
            {
                ::boost::shared_array< ::xmlChar> prop(
                    ::xmlGetProp(
                        this->node,
                        reinterpret_cast<const ::xmlChar*>(name.c_str())
                    ),
                    ::xmlFree
                );
                
                return nullptr != prop.get() ? reinterpret_cast<char*>(prop.get()) : ::std::string();
            }
            
            ::std::string getProperty(const ::std::string& name, const ::std::string& nameSpace) const
            {
                ::boost::shared_array< ::xmlChar> prop(
                    ::xmlGetNsProp(
                        this->node,
                        reinterpret_cast<const ::xmlChar*>(name.c_str()),
                        reinterpret_cast<const ::xmlChar*>(nameSpace.c_str())
                    ),
                    ::xmlFree
                );
                
                return nullptr != prop.get() ? reinterpret_cast<char*>(prop.get()) : ::std::string();
            }
            
            ::std::string getRelativeUri(const ::std::string& uri) const
            {
                ::boost::shared_array< ::xmlChar> relative(
                    ::xmlBuildRelativeURI(
                        reinterpret_cast<const ::xmlChar*>(uri.c_str()),
                        ::xmlNodeGetBase(this->node->doc, this->node)
                    ),
                    ::xmlFree
                );
                
                return nullptr != relative.get() ? reinterpret_cast<char*>(relative.get()) : ::std::string();
            }
            
            ::std::string getUri(const ::std::string& uri) const
            {
                ::boost::shared_array< ::xmlChar> absolute(
                    ::xmlBuildURI(
                        reinterpret_cast<const ::xmlChar*>(uri.c_str()),
                        ::xmlNodeGetBase(this->node->doc, this->node)
                    ),
                    ::xmlFree
                );
                
                return nullptr != absolute.get() ? reinterpret_cast<char*>(absolute.get()) : ::std::string();
            }
            
            bool hasChildren() const
            {
                return nullptr != this->node->children;
            }
            
            bool hasNamespace() const
            {
                return nullptr != this->node->ns;
            }
            
            bool hasParent() const
            {
                return nullptr != this->node->parent;
            }
            
            bool hasProperties() const
            {
                return nullptr != this->node->properties;
            }
            
            Attribute hasProperty(const ::std::string& name) const
            {
                return Attribute(
                    ::xmlHasProp(
                        this->node,
                        reinterpret_cast<const ::xmlChar*>(name.c_str())
                    )
                );
            }
            
            Attribute hasProperty(const ::std::string& name, const ::std::string& nameSpace) const
            {
                return Attribute(
                    ::xmlHasNsProp(
                        this->node,
                        reinterpret_cast<const ::xmlChar*>(name.c_str()),
                        reinterpret_cast<const ::xmlChar*>(nameSpace.c_str())
                    )
                );
            }
            
            bool isBlank() const
            {
                return 1 == ::xmlIsBlankNode(this->node) ? true : false;
            }
            
            bool isText() const
            {
                return 1 == ::xmlNodeIsText(this->node) ? true : false;
            }
            
            ::xmlNode& operator*() const
            {
                return *this->node;
            }
            
            bool removeAttribute(const Attribute& attribute)
            {
                return 0 == ::xmlRemoveProp(attribute.get()) ? true : false;
            }
            
            Node replace(const Node& node)
            {
                return Node(::xmlReplaceNode(this->node, node.get()));
            }
            
            void setContent(const ::std::string& content)
            {
                ::xmlNodeSetContent(
                    this->node,
                    reinterpret_cast<const ::xmlChar*>(content.c_str())
                );
            }
            
            void setName(const ::std::string& name)
            {
                ::xmlNodeSetName(this->node, reinterpret_cast<const ::xmlChar*>(name.c_str()));
            }
            
            Attribute setProperty(const ::std::string& name, const ::std::string& value)
            {
                return Attribute(
                    ::xmlSetProp(
                        this->node,
                        reinterpret_cast<const ::xmlChar*>(name.c_str()),
                        reinterpret_cast<const ::xmlChar*>(value.c_str())
                    )
                );
            }
            
            Attribute setProperty(const Namespace& nameSpace, const ::std::string& name, const ::std::string& value)
            {
                return Attribute(
                    ::xmlSetNsProp(
                        this->node,
                        nameSpace.get(),
                        reinterpret_cast<const ::xmlChar*>(name.c_str()),
                        reinterpret_cast<const ::xmlChar*>(value.c_str())
                    )
                );
            }
            
            int substitute(const int& flags = 0)
            {
                int substitutions = ::xmlXIncludeProcessTreeFlags(this->node, flags);
                
                if (-1 == substitutions)
                {
                    throw Exception(::xmlGetLastError()->message);
                }
                
                return substitutions;
            }
            
            void unlink()
            {
                ::xmlUnlinkNode(this->node);
            }
            
        protected:
            
        private:
            ::xmlNodePtr node;
        };
    }
}
 
#endif // RL_XML_NODE_H