TinyXML：TiXmlNode

friend class TiXmlDocument;
friend class TiXmlElement;

virtual ~TiXmlNode();
const char *Value() const { return value.c_str (); }
const std::string& ValueStr() const { return value; }
const TIXML_STRING& ValueTStr() const { return value; }
// 返回TiXmlNode的值

void SetValue(const char * _value) { value = _value;}
void SetValue( const std::string& _value )    { value = _value; }
// 设置TiXmlNode的值

void Clear();
// 删除此节点的所有子节点

TiXmlNode* Parent()                            { return parent; }
const TiXmlNode* Parent() const                { return parent; }
// 获取此节点的父节点

const TiXmlNode* FirstChild()    const        { return firstChild; }    
TiXmlNode* FirstChild()                        { return firstChild; }
const TiXmlNode* FirstChild( const char * value ) const;
TiXmlNode* FirstChild( const char * _value );
const TiXmlNode* FirstChild( const std::string& _value ) const    {    return FirstChild (_value.c_str ());    }    ///< STL std::string form.
TiXmlNode* FirstChild( const std::string& _value )                {    return FirstChild (_value.c_str ());    }    ///< STL std::string form.
// 获取此节点的第一个子节点

const TiXmlNode* LastChild() const    { return lastChild; }    
TiXmlNode* LastChild()    { return lastChild; }
const TiXmlNode* LastChild( const char * value ) const;    
TiXmlNode* LastChild( const char * _value );
const TiXmlNode* LastChild( const std::string& _value ) const    {    return LastChild (_value.c_str ());    }    ///< STL std::string form.
TiXmlNode* LastChild( const std::string& _value )                {    return LastChild (_value.c_str ());    }    ///< STL std::string form.
// 获取此节点的最后一个子节点

const TiXmlNode* IterateChildren( const TiXmlNode* previous ) const;
TiXmlNode* IterateChildren( const TiXmlNode* previous );
const TiXmlNode* IterateChildren( const char * value, const TiXmlNode* previous ) const;
TiXmlNode* IterateChildren( const char * _value, const TiXmlNode* previous );
const TiXmlNode* IterateChildren( const std::string& _value, const TiXmlNode* previous ) const    {    return IterateChildren (_value.c_str (), previous);    }    ///< STL std::string form.
TiXmlNode* IterateChildren( const std::string& _value, const TiXmlNode* previous ) {    return IterateChildren (_value.c_str (), previous);    }    ///< STL std::string form.
// 提供遍历此节点的子节点的另一种方式，while( child = parent->IterateChildren( child ) )

TiXmlNode* InsertEndChild( const TiXmlNode& addThis );
TiXmlNode* LinkEndChild( TiXmlNode* addThis );
// 插入一个新的子节点，通过引用/指针

TiXmlNode* InsertBeforeChild( TiXmlNode* beforeThis, const TiXmlNode& addThis );
TiXmlNode* InsertAfterChild(  TiXmlNode* afterThis, const TiXmlNode& addThis );
// 向某个子节点前(/后)添加一个子节点

TiXmlNode* ReplaceChild( TiXmlNode* replaceThis, const TiXmlNode& withThis );
// 替换掉某个子节点

bool RemoveChild( TiXmlNode* removeThis );
// 删除此节点的某个子节点

const TiXmlNode* PreviousSibling() const            { return prev; }
TiXmlNode* PreviousSibling()                        { return prev; }
const TiXmlNode* PreviousSibling( const char * ) const;
TiXmlNode* PreviousSibling( const char *_prev );
const TiXmlNode* PreviousSibling( const std::string& _value ) const    {    return PreviousSibling (_value.c_str ());    }    ///< STL std::string form.
TiXmlNode* PreviousSibling( const std::string& _value )             {    return PreviousSibling (_value.c_str ());    }    ///< STL std::string form.
const TiXmlNode* NextSibling( const std::string& _value) const        {    return NextSibling (_value.c_str ());    }    ///< STL std::string form.
TiXmlNode* NextSibling( const std::string& _value)                     {    return NextSibling (_value.c_str ());    }    ///< STL std::string form.
// 前一个兄弟节点

const TiXmlNode* NextSibling() const                { return next; }
TiXmlNode* NextSibling()                            { return next; }
const TiXmlNode* NextSibling( const char * ) const;
TiXmlNode* NextSibling( const char* _next );
// 后一个兄弟节点

const TiXmlElement* NextSiblingElement() const;
TiXmlElement* NextSiblingElement();
const TiXmlElement* NextSiblingElement( const char * ) const;
TiXmlElement* NextSiblingElement( const char *_next );
const TiXmlElement* NextSiblingElement( const std::string& _value) const    {    return NextSiblingElement (_value.c_str ());    }    ///< STL std::string form.
TiXmlElement* NextSiblingElement( const std::string& _value)                {    return NextSiblingElement (_value.c_str ());    }    ///< STL std::string form.
const TiXmlElement* FirstChildElement()    const;
TiXmlElement* FirstChildElement();
const TiXmlElement* FirstChildElement( const char * _value ) const;
TiXmlElement* FirstChildElement( const char * _value );
const TiXmlElement* FirstChildElement( const std::string& _value ) const    {    return FirstChildElement (_value.c_str ());    }    ///< STL std::string form.
TiXmlElement* FirstChildElement( const std::string& _value )                {    return FirstChildElement (_value.c_str ());    }    ///< STL std::string form.
// Convenience function to get through elements.

int Type() const    { return type; }
// 返回节点类型，下面要讲到的NodeType

const TiXmlDocument* GetDocument() const;
TiXmlDocument* GetDocument();
// 获取此节点所在DOM的指针

bool NoChildren() const                        { return !firstChild; }
// 测试此节点是否有子节点

virtual const TiXmlDocument*    ToDocument()    const { return 0; } 
virtual const TiXmlElement*     ToElement()     const { return 0; } 
virtual const TiXmlComment*     ToComment()     const { return 0; }
virtual const TiXmlUnknown*     ToUnknown()     const { return 0; } 
virtual const TiXmlText*        ToText()        const { return 0; }
virtual const TiXmlDeclaration* ToDeclaration() const { return 0; } 

virtual TiXmlDocument*          ToDocument()    { return 0; } 
virtual TiXmlElement*           ToElement()        { return 0; } 
virtual TiXmlComment*           ToComment()     { return 0; }
virtual TiXmlUnknown*           ToUnknown()        { return 0; }
virtual TiXmlText*                ToText()        { return 0; }
virtual TiXmlDeclaration*       ToDeclaration() { return 0; } 
// 将Node转换为其他NodeType

virtual TiXmlNode* Clone() const = 0;
// 创建此节点的副本

virtual bool Accept( TiXmlVisitor* visitor ) const = 0;
// 是否接受对TinyXML DOM中的节点进行层次访问

TiXmlNode( NodeType _type );
TiXmlNode*        parent;
NodeType        type;

TiXmlNode*        firstChild;
TiXmlNode*        lastChild;

TIXML_STRING    value;

TiXmlNode*        prev;
TiXmlNode*        next;

enum NodeType
{
　　TINYXML_DOCUMENT,
　　TINYXML_ELEMENT,
　　TINYXML_COMMENT,
　　TINYXML_UNKNOWN,
　　TINYXML_TEXT,
　　TINYXML_DECLARATION,
　　TINYXML_TYPECOUNT
};