genesis-3d_engine/Engine/foundation/io/xmlreader.h

/****************************************************************************
Copyright (c) 2006, Radon Labs GmbH
Copyright (c) 2011-2013,WebJet Business Division,CYOU
 
http://www.genesis-3d.com.cn

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****************************************************************************/
#pragma once
//------------------------------------------------------------------------------
/**
    @class IO::XmlReader
  
    Reads XML formatted data with random access from a stream using 
    TinyXML as backend. The XML document is represented as a tree of
    nodes, which can be navigated and queried.
    
*/
#include "io/streamreader.h"

#include "math/float4.h"
#include "math/float2.h"
#include "math/matrix44.h"
#include "util/assetpath.h"

#include "tinyxml/tinyxml.h"
#include "util/scriptbind.h"

//------------------------------------------------------------------------------
namespace IO
{
class XmlReader : public StreamReader
{
    __DeclareClass(XmlReader);
	__ScriptBind
public:
    /// constructor
    XmlReader();
    /// destructor
    virtual ~XmlReader();

    /// begin reading from the stream
    virtual bool Open();
    /// end reading from the stream
    virtual void Close();

    /// return true if node exists 
    bool HasNode(const Util::String& path) const;
    /// get short name of current node
    Util::String GetCurrentNodeName() const;
    /// get path to current node
    Util::String GetCurrentNodePath() const;
    /// returns the line number of the current node
    int GetCurrentNodeLineNumber() const;
    
    /// set current node as path
    void SetToNode(const Util::String& path);
    /// set current node to first child node, return false if no child exists
    bool SetToFirstChild(const Util::String& name = "");
    /// set current node to next sibling node, return false if no more sibling exists
    bool SetToNextChild(const Util::String& name = "");
    /// set current node to parent, return false if no parent exists
    bool SetToParent();

    /// return true if matching attribute exists on current node
    bool HasAttr(const char* attr) const;
    /// return names of all attrs on current node
    Util::Array<Util::String> GetAttrs() const;

    /// return true if current node has embedded content
    bool HasContent() const;
    /// return embedded content of current node
    Util::String GetContent() const;

    /// get string attribute value from current node
    Util::String GetString(const char* attr) const;
	/// get char* attribute value from current node and step fword
	const char* GetString_forward(const char* name );
    /// get bool attribute value from current node
    bool GetBool(const char* attr) const;
    /// get int attribute value from current node
    int GetInt(const char* attr) const;
    /// get float attribute value from current node
    float GetFloat(const char* attr) const;

    /// get float2 attribute value from current node
	Math::float2 GetFloat2(const char* attr) const;
    /// get float4 attribute value from current node
    Math::float4 GetFloat4(const char* attr) const;
	/// get float4 attribute value from current node
	Math::float3 GetFloat3(const char* attr) const;
    /// get matrix44 attribute value from current node
    Math::matrix44 GetMatrix44(const char* attr) const;
	/// get assetpath attribute value from current node
	Util::AssetPath GetAssetPath(const char* attr) const;

    /// generic getter for extension types
    template<typename T> T Get(const char* attr) const;

    /// get optional string attribute value from current node
    Util::String GetOptString(const char* attr, const Util::String& defaultValue) const;
    /// get optional bool attribute value from current node
    bool GetOptBool(const char* attr, bool defaultValue) const;
    /// get optional int attribute value from current node
    int GetOptInt(const char* attr, int defaultValue) const;
    /// get optional float attribute value from current node
    float GetOptFloat(const char* attr, float defaultValue) const;

    /// get float2 attribute value from current node
    Math::float2 GetOptFloat2(const char* attr, const Math::float2& defaultValue) const;
    /// get optional float4 attribute value from current node
    Math::float4 GetOptFloat4(const char* attr, const Math::float4& defaultValue) const;
    /// get optional matrix44 attribute value from current node
    Math::matrix44 GetOptMatrix44(const char* attr, const Math::matrix44& defaultValue) const;


	TiXmlElement* GetCurrentNode(void) const;

	void SetCurrentNode( TiXmlElement* node );

   

private:
    /// find a node by path, handles relativ paths as well
    TiXmlNode* FindNode(const Util::String& path) const;

    /// static helper object for TinyXml-Initialization at application startup
    class TinyXmlInitHelper
    {
    public:
        /// constructor
        TinyXmlInitHelper()
        {
            TiXmlBase::SetCondenseWhiteSpace(true);
        }
    };

    static TinyXmlInitHelper initTinyXml;
    TiXmlDocument* xmlDocument;
    TiXmlElement* curNode;
	
	protected:

};

//------------------------------------------------------------------------
inline
TiXmlElement* XmlReader::GetCurrentNode(void) const
{
	return curNode;
}
//------------------------------------------------------------------------
inline 
void 
XmlReader::SetCurrentNode(TiXmlElement* node)
{
	curNode = node;
}



} // namespace IO
//------------------------------------------------------------------------------