svgtopt/SVG/SVGEngine/src/SVGAttributeVerifier.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Thu, 07 Jan 2010 16:19:02 +0200
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Revision: 200951 Kit: 201001
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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:  SVG Implementation header file
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 *
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*/
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#include "SVGAttributeVerifier.h"
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#include <limits.h>
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#include <hal.h>
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#include <hal_data.h>
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// --------------------------------------------------------------------------
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// TBool CSvgAttributeVerifier::ParseForDecimalValue( const TDesC& aNum2Str, TReal32& aValue )
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// ---------------------------------------------------------------------------
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TBool CSvgAttributeVerifier::ParseForDecimalValue( const TDesC& aNum2Str, TReal32& aValue, const TDesC& aAttrValue, TBool isSvgElement )
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	{
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	TLex parser( aNum2Str );
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	parser.SkipSpace();
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	TInt result = parser.Val( aValue, '.' );
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	TChar chr;
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    TBool numUnits = EFalse ;
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    TPtrC16 remChars = parser.Remainder();
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    TInt dimInTwips ;
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    TInt dimInPixels;
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    const TReal32 TwipsInCentimeters = 566.929133858268 ;
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    const TReal32 TwipsInInches = 1440 ;
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    const TReal32 TwipsInPt = 20 ;
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    const TReal32 TwipsInPc = 240 ;
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    _LIT(Kcm,"cm");
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    _LIT(Kmm,"mm");
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    _LIT(Kin,"in");
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    _LIT(KPx,"px");
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    _LIT(KPt,"pt");
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    _LIT(KPc,"pc");
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    _LIT(KPer,"%");
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    _LIT(KWidth, "width");
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    _LIT(KHeight, "height");
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    if(isSvgElement)
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    {
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	    if(aAttrValue == KWidth)
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	    {
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	  		if(remChars == Kcm)
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	    	{
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		    	numUnits = ETrue;
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		    	HAL::Get( HALData::EDisplayXTwips, dimInTwips );
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				HAL::Get( HALData::EDisplayXPixels, dimInPixels );
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				aValue *=  (dimInPixels*TwipsInCentimeters)/dimInTwips ;
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	    	}
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		    else if(remChars == Kmm)
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		    {
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		    	numUnits = ETrue;
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		    	HAL::Get( HALData::EDisplayXTwips, dimInTwips );
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				HAL::Get( HALData::EDisplayXPixels, dimInPixels );
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				aValue *=  (dimInPixels*TwipsInCentimeters/10)/dimInTwips ;
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		    }
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		    else if(remChars == Kin)
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		    {
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		    	numUnits = ETrue;
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				HAL::Get( HALData::EDisplayXTwips, dimInTwips );
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				HAL::Get( HALData::EDisplayXPixels, dimInPixels );
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				aValue *=  (dimInPixels*TwipsInInches)/dimInTwips ;
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		    }
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		    else if(remChars == KPt)
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		    {
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		    	numUnits = ETrue;
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				HAL::Get( HALData::EDisplayXTwips, dimInTwips );
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				HAL::Get( HALData::EDisplayXPixels, dimInPixels );
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				aValue *=  (dimInPixels*TwipsInPt)/dimInTwips ;
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		    }
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		    else if(remChars == KPc)
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		    {
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		    	numUnits = ETrue;
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				HAL::Get( HALData::EDisplayXTwips, dimInTwips );
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				HAL::Get( HALData::EDisplayXPixels, dimInPixels );
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				aValue *=  (dimInPixels*TwipsInPc)/dimInTwips ;
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		    }
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		    else if(remChars == KPx || remChars == KPer)
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		    {
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		    	numUnits = ETrue;
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		    }
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		}
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	    else if(aAttrValue == KHeight)
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	    {
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	    	if(remChars == Kcm)
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	    	{
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		    	numUnits = ETrue;
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		    	HAL::Get( HALData::EDisplayYTwips, dimInTwips );
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   110
				HAL::Get( HALData::EDisplayYPixels, dimInPixels );
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parents:
diff changeset
   111
				
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				aValue *=  (dimInPixels*TwipsInCentimeters)/dimInTwips ;
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   113
	    	}
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   114
		    else if(remChars == Kmm)
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parents:
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   115
		    {
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   116
		    	numUnits = ETrue;
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   117
		    	
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   118
		    	HAL::Get( HALData::EDisplayYTwips, dimInTwips );
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   119
				HAL::Get( HALData::EDisplayYPixels, dimInPixels );
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parents:
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   120
				
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				aValue *=  (dimInPixels*TwipsInCentimeters/10)/dimInTwips ;
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		    }
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		    else if(remChars == Kin)
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   124
		    {
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		    	numUnits = ETrue;
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   126
		    	
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				HAL::Get( HALData::EDisplayYTwips, dimInTwips );
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   128
				HAL::Get( HALData::EDisplayYPixels, dimInPixels );
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   129
				aValue *=  (dimInPixels*TwipsInInches)/dimInTwips ;
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   130
		    }
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   131
		    else if(remChars == KPt)
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   132
		    {
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   133
		    	numUnits = ETrue;
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   134
		    	
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   135
				HAL::Get( HALData::EDisplayYTwips, dimInTwips );
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   136
				HAL::Get( HALData::EDisplayYPixels, dimInPixels );
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   137
				aValue *=  (dimInPixels*TwipsInPt)/dimInTwips ;
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   138
		    }
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parents:
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   139
		    else if(remChars == KPc)
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   140
		    {
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   141
		    	numUnits = ETrue;
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   142
		    	
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   143
				HAL::Get( HALData::EDisplayYTwips, dimInTwips );
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   144
				HAL::Get( HALData::EDisplayYPixels, dimInPixels );
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   145
				aValue *=  (dimInPixels*TwipsInPc)/dimInTwips ;
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   146
		    }
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		    else if(remChars == KPx || remChars == KPer)
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   148
		    {
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		    	numUnits = ETrue;
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		    }
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   151
		}
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   152
    }
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   153
    
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   154
    
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   155
    if(!numUnits)
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   156
	while(!(parser.Eos()))
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   157
	{
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   158
		chr=parser.Get();
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   159
		if(!chr.IsDigit())
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   160
		{
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   161
			aValue=0;
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   162
			return result==KErrNotFound;	
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   163
		}
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   164
		parser.Inc();
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   165
	}
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   166
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   167
	if (result != KErrNone)
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parents:
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   168
		{
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   169
		aValue= 0;
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   170
		}
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parents:
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   171
	parser.SkipSpace();
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   172
	return result == KErrNone;
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   173
	}
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parents:
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   174
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parents:
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   175
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parents:
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   176
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   177
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   178
// --------------------------------------------------------------------------
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   179
// TBool CSvgAttributeVerifier::ValidAttrValue( const TDesC& aValue,
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   180
// ---------------------------------------------------------------------------
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   181
TBool CSvgAttributeVerifier::ValidAttrValue( const TDesC& aValue,
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   182
											 TReal32& aConvVal,
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parents:
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   183
											 TUint8 aDatatype,
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parents:
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   184
											 const TDesC& aAttrValue,
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parents:
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   185
											 TBool isSvgElement)
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parents:
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   186
	{
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   187
	TReal32 lMinValue = (TReal32)(aDatatype==KSVG_LENGTH_TYPE ? 0 : -KMax16BitValue);
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parents:
diff changeset
   188
	// invalid number string
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parents:
diff changeset
   189
	if ( !ParseForDecimalValue( aValue, aConvVal, aAttrValue, isSvgElement) )
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parents:
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   190
		{
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parents:
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   191
		aConvVal=0;
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parents:
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   192
		return EFalse;
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parents:
diff changeset
   193
		}
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parents:
diff changeset
   194
	// less than minimum value
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parents:
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   195
	else if ( aConvVal > KMax16BitValue )
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parents:
diff changeset
   196
		{
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parents:
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   197
		aConvVal = KMax16BitValue;
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parents:
diff changeset
   198
		return EFalse;
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parents:
diff changeset
   199
		}
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parents:
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   200
	// greater than maximum value
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parents:
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   201
	else if ( aConvVal < lMinValue )
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parents:
diff changeset
   202
		{
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parents:
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   203
		aConvVal = lMinValue;
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parents:
diff changeset
   204
		return EFalse;
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parents:
diff changeset
   205
		}
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parents:
diff changeset
   206
	// number string is valid and within range
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parents:
diff changeset
   207
	return ETrue;
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parents:
diff changeset
   208
	}
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parents:
diff changeset
   209