messagingapp/msgutils/unidatamodel/unimmsdataplugin/inc/ConformanceChecker.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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/*
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* Copyright (c) 2003 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description: 
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*
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*/
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#ifndef CONFORMANCECHECKER_H
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#define CONFORMANCECHECKER_H
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//  INCLUDES
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#include <e32base.h>
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#include <e32std.h>
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#include <gmxmldocument.h>
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#include <gmxmlelement.h>
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// CONSTANTS
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_LIT(KMetaTag,"meta");
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_LIT(KPercent,"%");
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_LIT(KPx,"px");
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_LIT(KMs,"ms");
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_LIT(KImage,"Image");
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_LIT(KText,"Text");
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const TInt KUSAsciiMinCode = 0;
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const TInt KUSAsciiMaxCode = 127;
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//Type for the version of the Conformance Document
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enum TMmsSmilVersion
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	{
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	EMmsSmil_v2_0=2,
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	EMmsSmil_v3_0
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	};
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enum TFlags
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	{
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	EAllowVideoTag=1,				//Allowing  video tag as media
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	EAllowAllAttributes=2,			//Not checking the attribute name of the elements
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	EAllowNonMilliseconds=4,		//Allows other  timing specifications then 'ms' (e.g. 's')
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	EAllowNonUsAscii=8,				//Allows other  than us-ascii values for src attribute
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									//for media elements
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	EAllowMixedRegionDimensions=16,	//Allows mixed region dimensions (pixel and percent)
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	EAllowSeqTag=32,				//Allows one <seq> tag right after the <body> tag
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	EAllowAnyRegionNames=64			//Allows any name for the regions
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	};
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// CLASS DECLARATION
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/**
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*  Class for checking the the content of a DOM tree against the Conformance Document.
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*  (Checking legacy content.)
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*
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*  @lib smileng.lib
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*  @since 2.0
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*/
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class CConformanceChecker : public CBase
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	{
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    public:  // Constructors and destructor
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        /**
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        * Two-phased constructor.
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		* @param aStrict - value of the checking mode flag
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        */
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        static CConformanceChecker* NewL();
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        /**
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        * Destructor.
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        */
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        ~CConformanceChecker();
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    public: // New functions
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        /**
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	    * Checks if the DOM tree's content is legacy content or not.
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        * @param aXmldoc - the root of the DOM tree
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		* @aVersion - the version of the Conformance Document
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		* @aFlags - the flags to gide the checking (combination of TFlags values)
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        * @return - true if the content is legacy
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				  - false  if the content is not legacy
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        */
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        TBool Check(CMDXMLDocument* aXmldoc, TMmsSmilVersion aVersion, TInt aFlags);
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    private:
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		/** Checks the structure of the head element: allowed to contain only layout and meta element
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		* @param aHead - the root of head subtree
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		* @param aStrict - flag for checking mode (true strict checking, false loose checking)
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		* @return  - true - if head has legacy structure
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		*		   - false - otherwise
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		*/
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		TBool CheckHeadStructure(CMDXMLNode* aHead);
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		/** Checks the structure of the body element:
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								- allowed to contain only par elements
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		*						(one including seq element right after the body is allowed)
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		* @param aBody - the root of body subtree
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		* @return  - true - if body has legacy structure
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		*		   - false - otherwise
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		*/
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		TBool CheckBodyStructure(CMDXMLNode* aBody);
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		/** Checks the content of the layout element
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		*						- root-layout and max. 2 region elements are allowed
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		* @param aLayout - the root of layout subtree
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		* @return  - true - if layout has legacy content
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		*		   - false - otherwise
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		*/
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		TBool CheckLayoutContent(CMDXMLNode* aLayout);
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		/** Checks the content of the body element
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		* @param aBody - the root of body subtree
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		* @return - true - if body has legacy content
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		*		  - false - otherwise
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		*/
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		TBool CheckBodyContent(CMDXMLNode* aBody);
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		/** Checks the content of the par element
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		* @param aPar - the root of par subtree
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		* @return  - true - if par has legacy content
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		*		   - false - otherwise
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		*/
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		TBool CheckParContent(CMDXMLNode* aPar);
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		/** Checks if  a descriptor is ending with 'ms'
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		* @param aValue - value to check
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		* @return  - true if the ending is ms
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		*		   - false otherwise
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		*/
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		TBool IsInMilliseconds(TDesC& aValue) const;
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		/** Checks if the given value is ending with percent or pixel
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		* and if this is conforming to the already set pixel and percent values.
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		* @param aValue - value to check,
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		*				- should be the value of 'width', 'height', 'top', 'left'
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		*				   attributes for a region
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		* @param aPercent - true if the value should end with percent
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		* @param aPixel - true if the value should be in pixel
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		* @return  true - if the value is not mixed (regarding aPercent,aPixel)
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		*		   false - if mixed
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		*/
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		TBool CheckMixedRegionAttribute(TDesC& aValue,TBool& aPercent,TBool& aPixel) const;
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		/** Checks if the given value is exactly "Image" or "Text" and if it
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		* is duplicated (checking the transmitted boolean parameters).
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		* @param aValue - value to check,
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		* @param aFoundImage - true if the "Image" value will be duplicate
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		* @param aFoundText - true if the "Text" value will be duplicate
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		* @return  true - if the value is "Image" or "Text" and it's not duplicated
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		*		   false - otherwise
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		*/
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		TBool CheckRegionNames(TDesC& aValue,TBool& aFoundImage,TBool& aFoundText) const;
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    private:    // Data
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		TInt iFlags; //contains the flags to guide the checking
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    };
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#endif      // CONFORMANCECHECKER_H
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// End of File