yahoosearchmodel.h

使用yahoo图片搜索功能在手机上的以应用

#ifndef CYahooSearchModel_H_
#define CYahooSearchModel_H_

#include <e32std.h>
#include <e32base.h>
#include <e32cmn.h>
#include <e32des8.h>
#include <xml/parser.h>
#include <xml/contenthandler.h>
#include <stringpool.h>

const int MAX_TITLE_LENGTH = 255;
const int MAX_SUMMARY_LENGTH = 255;
const int MAX_URL_LENGTH = 1024;
const int MAX_DATETIME_LENGTH = 100;
const int MAX_TAG_LENGTH = 32;
const int MAX_FORMAT_LENGTH = 10;
const int MAX_NUMBER_LENGTH = 10;

class TYahooImageInfo
{
public:
	TBuf<MAX_TITLE_LENGTH> 	  title;
	TBuf<MAX_SUMMARY_LENGTH>  summary;
	TBuf<MAX_URL_LENGTH>	  url;
	TBuf<MAX_FORMAT_LENGTH>	  fileFormat;
	int						  fileSize;
	int						  width;
	int						  height;
	TBuf<MAX_URL_LENGTH>	  thumbnailUrl;
	int						  thumbnailWidth;
	int						  thumbnailHeight;
	bool					  invalid;
};

class CYahooSearchModel : public CBase, public Xml::MContentHandler
{
public:

		CYahooSearchModel();
		
		void ConstructL();
		
		~CYahooSearchModel();
		
		void AppendL(const TDesC8& text);
		
		void ParseL();
		
		int	 GetImageCount() {return iImages->Count();}
		
		void GetImageInfo(int index, TYahooImageInfo& image) {image = (*iImages)[index];}
	
		// MContentHandler methods	
		
		void OnStartDocumentL(const Xml::RDocumentParameters& aDocParam, TInt aErrorCode);
		void OnEndDocumentL(TInt aErrorCode);
		void OnStartElementL(const Xml::RTagInfo& aElement, const Xml::RAttributeArray& aAttributes, 
										 TInt aErrorCode);
		void OnEndElementL(const Xml::RTagInfo& aElement, TInt aErrorCode);
		void OnContentL(const TDesC8& aBytes, TInt aErrorCode);
		void OnStartPrefixMappingL(const RString& aPrefix, const RString& aUri, 
												TInt aErrorCode);
		void OnEndPrefixMappingL(const RString& aPrefix, TInt aErrorCode);
		void OnIgnorableWhiteSpaceL(const TDesC8& aBytes, TInt aErrorCode);
		void OnSkippedEntityL(const RString& aName, TInt aErrorCode);
		void OnProcessingInstructionL(const TDesC8& aTarget, const TDesC8& aData, 
												TInt aErrorCode);
		void OnError(TInt aErrorCode);
		TAny* GetExtendedInterface(const TInt32 aUid);

private:

	RBuf8  iFeedText;
	CArrayFixFlat<TYahooImageInfo> *iImages;
	bool iInEntry;
	TYahooImageInfo iPendingImage;
	
	Xml::CParser *iParser;
	
	typedef TBuf8<MAX_TAG_LENGTH> TTagBuf;
	CArrayFixFlat<TTagBuf> *iTagStack;
	TBuf<MAX_NUMBER_LENGTH> iNumberText;
	TDes *iCurrContent;
	
	void PushTagL(TTagBuf tag);
	TTagBuf PeekTag();
	TTagBuf PopTag();
	void AppendDesCL(const TDesC8& src, TDes& dest);
};

#endif /*CYahooSearchModel_H_*/