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#ifndef SkXMLParser_DEFINED
#define SkXMLParser_DEFINED

#include "SkMath.h"
#include "SkString.h"

class SkStream;

class SkDOM;
struct SkDOMNode;

class SkXMLParserError {
public:
	enum ErrorCode {
		kNoError,
		kEmptyFile,
		kUnknownElement,
		kUnknownAttributeName,
		kErrorInAttributeValue,
		kDuplicateIDs,
		kUnknownError
	};

	SkXMLParserError();
	virtual ~SkXMLParserError();
	ErrorCode getErrorCode() const { return fCode; }
	virtual void getErrorString(SkString* str) const;
	int getLineNumber() const { return fLineNumber; }
	int getNativeCode() const { return fNativeCode; }
	bool hasError() const { return fCode != kNoError || fNativeCode != -1; }
	bool hasNoun() const { return fNoun.size() > 0; }
	void reset();
	void setCode(ErrorCode code) { fCode = code; }
	void setNoun(const SkString& str) { fNoun.set(str); }
	void setNoun(const char* ch)  { fNoun.set(ch); }
	void setNoun(const char* ch, size_t len) { fNoun.set(ch, len); }
protected:
	ErrorCode fCode;
private:
	int fLineNumber;
	int fNativeCode;
	SkString fNoun;
	friend class SkXMLParser;
};

class SkXMLParser {
public:
			SkXMLParser(SkXMLParserError* parserError = nil);
	virtual	~SkXMLParser();

	/**	Returns true for success
	*/
	bool parse(const char doc[], size_t len);
	bool parse(SkStream& docStream);
	bool parse(const SkDOM&, const SkDOMNode*);

	static void GetNativeErrorString(int nativeErrorCode, SkString* str);

protected:
	// override in subclasses; return true to stop parsing
	virtual bool onStartElement(const char elem[]);
	virtual bool onAddAttribute(const char name[], const char value[]);
	virtual bool onEndElement(const char elem[]);
	virtual bool onText(const char text[], int len);

public:
	// public for ported implementation, not meant for clients to call
	virtual bool startElement(const char elem[]);
	virtual bool addAttribute(const char name[], const char value[]);
	virtual bool endElement(const char elem[]);
	virtual bool text(const char text[], int len); 
	void* fParser;
protected:
	SkXMLParserError* fError;
private:
	void reportError(void* parser);
};

#endif