textrendering/texthandling/stext/TXTSCAN.CPP
author Pat Downey <patd@symbian.org>
Wed, 01 Sep 2010 12:39:40 +0100
branchRCL_3
changeset 55 336bee5c2d35
parent 54 748ec5531811
permissions -rw-r--r--
Revert incorrect RCL_3 drop: Revision: 201021 Kit: 201035
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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/*
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* Copyright (c) 2003-2009 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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#include "TXTETEXT.H"
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#include "TXTSTD.H"
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EXPORT_C TInt CPlainText::CharPosOfParagraph(TInt& aLength,TInt aParaOffset)const
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/** Finds the length and the start position of a paragraph identified by its 
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paragraph number the first paragraph is numbered zero.
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Notes:
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if aParaOffset is invalid, (equal to or greater than the total number of 
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paragraphs), the function's return value is EScanEndOfData
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@param aLength On return contains the length of the specified paragraph. 
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@param aParaOffset The paragraph number. The first paragraph is numbered zero. 
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@return The document position of the first character in the paragraph. */
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	{
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	__TEST_INVARIANT;
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	TInt startPos=aLength=0;
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	TUint scanMask=(EScanToUnitStart);
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	aLength=ScanParas(startPos,scanMask);
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	for (TInt offset=1;offset<=aParaOffset;offset++)
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		{
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		if (startPos<=EScanEndOfData)
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			return EScanEndOfData;
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		aLength=ScanParas(startPos,scanMask);
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		}
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	if (startPos==EScanEndOfData)
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		startPos=iByteStore->Size()/sizeof(TText);
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	return startPos-aLength;
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	}
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EXPORT_C TInt CPlainText::ParagraphNumberForPos(TInt& aPos)const
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/** Gets the number of the paragraph which contains a document position. 
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Paragraph numbering begins at zero.
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@param aPos A document position. Must be valid or a panic occurs. On return, 
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contains the document position of the first character in the paragraph in 
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which it is located. 
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@return The number of the paragraph containing the specified document position.
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The first paragraph is numbered zero. */
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	{
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	__TEST_INVARIANT;
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	__ASSERT_ALWAYS(aPos>=0 && aPos<=DocumentLength(),Panic(ECharPosBeyondDocument));
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	TUint scanMask=(EScanBackwards|EScanStayIfBoundary|EScanToUnitStart);
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	ScanParas(aPos,scanMask);
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	// aPos now holds the 1st char of the paragraph.
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	TInt paraOffset=0,currentPos=0;
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	scanMask=EScanToUnitStart;
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	while (currentPos<aPos)
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		{// Move forwards, counting paragraphs until we get to the current position.
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		paraOffset++;
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		ScanParas(currentPos,scanMask);
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		}
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	return paraOffset;
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	}
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EXPORT_C void CPlainText::GetWordInfo(TInt aCurrentPos,TInt& aStartPos,TInt& aLength,
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									  TBool aPictureIsDelimiter,TBool aPunctuationIsDelimiter)const
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/** Gets the start position and length of the word that contains the document 
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position specified.
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@param aCurrentPos A document position. Must be valid or a panic occurs. 
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@param aStartPos On return, the document position of the first character in 
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the word containing the position aCurrentPos.
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@param aLength On return, the length of the word containing document position 
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aCurrentPos.
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@param aPictureIsDelimiter ETrue if picture characters should be treated as 
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word delimiters, false if not. For example, when navigating text, this might 
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be EFalse, but when spell checking, it might be ETrue. 
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@param aPunctuationIsDelimiter ETrue if punctuation characters should be treated 
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as word delimiters, EFalse if not. */
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	{
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	__TEST_INVARIANT;
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	__ASSERT_ALWAYS(aCurrentPos>=0 && aCurrentPos<=DocumentLength(),Panic(ECharPosBeyondDocument));
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	aStartPos=aLength=aCurrentPos;
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	// First find the start of the word.
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	TUint scanMask=(EScanBackwards|
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					EScanStayIfBoundary|
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					EScanToUnitStart);
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	if (aPictureIsDelimiter)
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		scanMask|=EScanPictureIsDelimiter;
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	if (aPunctuationIsDelimiter)
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		scanMask|=EScanPunctuationIsDelimiter;
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	ScanWords(aStartPos,scanMask);
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	// Next find the end of the word.
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	scanMask=(EScanStayIfBoundary|EScanToUnitEnd);
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	if (aPictureIsDelimiter)
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		scanMask|=EScanPictureIsDelimiter;
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	if (aPunctuationIsDelimiter)
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		scanMask|=EScanPunctuationIsDelimiter;
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	ScanWords(aLength,scanMask);
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	aLength-=aStartPos;
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	__ASSERT_DEBUG(aLength+aStartPos<=(DocumentLength()+1),Panic(ECharPosBeyondDocument));
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   116
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	__TEST_INVARIANT;
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	}
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   119
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EXPORT_C TInt CPlainText::ToParagraphStart(TInt& aPos) const
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/** Gets the document position of the start of the paragraph containing the 
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specified document position.
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   123
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@param aPos A document position. Must be valid or a panic occurs. On return, 
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contains the document position of the first character in the paragraph in 
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which it is located.
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@return The number of characters skipped in scanning to the start of the 
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paragraph. */
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	{
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	__TEST_INVARIANT;
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	__ASSERT_ALWAYS(aPos>=0 && aPos<=DocumentLength(),Panic(ECharPosBeyondDocument));
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   132
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	int skipped = 0;
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	while (aPos > 0)
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		{
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		TPtrC8 p = iByteStore->BackPtr(aPos * sizeof(TText));
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		const TText* start = (TText*)p.Ptr();
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		const TText* end = start + p.Length() / sizeof(TText);
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		while (end > start)
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			{
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			end--;
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			if (*end == EParagraphDelimiter)
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				return skipped;
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			aPos--;
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			skipped++;
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			}
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		}
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	return skipped;
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	}
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EXPORT_C TInt CPlainText::WordCount()const
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/** Gets a count of the number of words in the text object.
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@return The number of words in the text object. */
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	{return CountUnits(EUnitIsWord);}
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EXPORT_C TInt CPlainText::ParagraphCount()const
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/** Gets a count of the number of paragraphs in the text object.
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Note: the paragraph delimiter which terminates every text object means this 
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function always returns a count of at least one.
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@return The number of paragraphs contained in the text object. */
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	{//return CountUnits(EUnitIsParagraph);}
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	TInt pos=0,unitCount=0;
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	TUint scanMask=(EScanToUnitStart);
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	while (pos!=EScanEndOfData)
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		{
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		unitCount++;
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		ScanParas(pos,scanMask);
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		}
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	return unitCount;
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	}
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TInt CPlainText::CountUnits(TUnitOfText aContext)const
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// Returns the number of units in the document, where
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// units are defined by the parameter aContext.
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//
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	{
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	SScanData scanData;
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	TInt pos=0,unitCount=0;
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	TUint scanMask=(EScanToUnitStart|EScanJoinDelimiters|EScanStayIfBoundary);
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	InitScanControl(pos,scanMask,aContext,scanData);
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	ScanUnit(pos,aContext,scanData);
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	// The above code skips over leading white space
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	scanData.scanMask &=~ EScanStayIfBoundary;
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	while(pos!=EScanEndOfData)
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		{
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		unitCount++;
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		ScanUnit(pos,aContext,scanData);
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		}//	Count complete, so return pos to the beginning of the data
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	pos=0;
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	return unitCount;
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	}
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   195
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   196
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   197
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   198
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EXPORT_C TInt CPlainText::ScanWords(TInt& aPos,TUint& aScanMask)const
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/** Scans from a document position to the beginning or end of a word. The 
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destination is determined by a scan mask. The scan can either be forwards 
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(the default) or backwards, and the destination may be the first or last 
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character in the word containing the position, or the first character in 
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the next word.
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   205
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Note: If an attempt is made to scan beyond the end of text delimiter, on return, 
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aPos is set to EScanEndOfData  and the function's return value indicates 
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the number of characters skipped in passing the end of text delimiter.
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   209
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@param aPos The document position from which to scan. Must be valid, or a 
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panic occurs. On return, contains the new document position. 
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@param aScanMask The scan mask. See the enumeration whose values begin with 
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CPlainText::EScanBackwards. 
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@return The number of characters skipped to reach the new document position. */
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	{
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	__ASSERT_ALWAYS(aPos>=0 && aPos<=DocumentLength(),Panic(ECharPosBeyondDocument));
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	SScanData scanData;
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	InitScanControl(aPos,aScanMask,EUnitIsWord,scanData);
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	return ScanUnit(aPos,EUnitIsWord,scanData);
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	}
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   221
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EXPORT_C TInt CPlainText::ScanParas(TInt& aPos,TUint& aScanMask)const
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/** Scans from a document position to the beginning or end of a paragraph. The 
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destination is determined by a scan mask. The scan can either be forwards 
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(the default) or backwards, and the destination may be the first or last 
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character in the paragraph containing the position, or the first character in 
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the next paragraph. 
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Note: if an attempt is made to scan beyond the end of text delimiter, on return, 
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aPos is set to EScanEndOfData ) and the function's return value indicates 
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the number of characters skipped in passing the end of text delimiter.
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@param aPos The document position to scan from. Must be valid or a panic occurs. 
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On return, contains the new document position. 
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@param aScanMask The scan mask. See the enumeration whose values begin with 
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CPlainText::EScanBackwards. 
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@return The number of characters skipped to reach the new document position. */
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	{
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	__ASSERT_ALWAYS(aPos>=0 && aPos<=DocumentLength(),Panic(ECharPosBeyondDocument));
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	SScanData scanData;
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	InitScanControl(aPos,aScanMask,EUnitIsParagraph,scanData);
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	return ScanUnit(aPos,EUnitIsParagraph,scanData);
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	}
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   245
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void CPlainText::InitScanControl(TInt& aPos,TUint& aScanMask,TUnitOfText aContext,SScanData& aScanData)const
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// Initialises the control segment of the bitmask
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// used to determine when scan has completed.
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// Calls the initialisation of aScanData.
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//
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	{
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	aScanData.pos=aPos;
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	aScanData.scanMask=0;
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	aScanData.scanMask|=aScanMask;
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	if (aScanData.scanMask & EScanStayIfBoundary)
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		{//Scan one unit the other way first.
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			aScanData.scanMask ^= EScanBackwards;  // Alter scan direction.
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			InitScanData(aScanData.pos,aScanData);				
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			TestForDelimiter(aContext,aScanData);
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			aScanData.scanMask ^= EScanBackwards;  // Restore original scan direction.
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		}
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	InitScanData(aScanData.pos,aScanData);
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	if(!aPos && (aScanData.scanMask&(EScanStayIfBoundary|EScanBackwards))==EScanStayIfBoundary)
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		{//At the start of the buffer and scanning forwards and ScanStayIfBoundary set.
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		aScanData.scanMask &=~aScanData.EInsideUnit;
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		}
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	else 
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		{
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		TestForDelimiter(aContext,aScanData);
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		if (aScanData.scanMask & aScanData.EIsDelimiter)
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			aScanData.scanMask &=~ aScanData.EInsideUnit;
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		else
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 			aScanData.scanMask |= aScanData.EInsideUnit;
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		}
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	if (aScanData.scanMask & EScanBackwards)
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		{//Set stop flags relative to scan direction
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		if (aScanData.scanMask &  EScanToUnitStart)
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			aScanData.scanMask |= aScanData.EStopEnd;
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		if (aScanData.scanMask &  EScanToUnitEnd)
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			aScanData.scanMask |= aScanData.EStopBegin;
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		}
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	else
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		{//Set stop flags relative to scan direction
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		if (aScanData.scanMask &  EScanToUnitStart)
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			aScanData.scanMask |= aScanData.EStopBegin;
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		if (aScanData.scanMask &  EScanToUnitEnd)
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			aScanData.scanMask |= aScanData.EStopEnd;
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		}
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	}
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   290
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   291
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void CPlainText::InitScanData(TInt aPos,SScanData& aScanData)const
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// Initialises the necessary elements of the scan structure, for ScanXxx 
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// methods.  These are used to track scan progress.
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//
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	{
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	aScanData.pos=aPos;
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   298
	aScanData.oldPos=aPos;
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   299
	aScanData.currentSegLen=0;
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	if (aScanData.scanMask & EScanBackwards)
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		{//Scanning backwards.
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		aScanData.delta=-1;
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		aScanData.totalBufLen=aPos;
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   304
		}
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   305
	else
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   306
		{//Scanning forwards.
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   307
		aScanData.delta=+1;
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   308
		aScanData.totalBufLen=((iByteStore->Size()/sizeof(TText))-aScanData.pos);
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   309
		}
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	}	
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   311
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   312
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TInt CPlainText::ScanUnit(TInt& aPos,TUnitOfText aContext,SScanData& aScanData)const
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// Scan from position aPos, by one unit.
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   315
// Update aPos to the current position, and return the number
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   316
// of characters skipped or EScanEndOfData if at the end of the buffer.
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//
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   318
	{
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   319
	while (TestForDelimiter(aContext,aScanData))
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   320
		{//More data has been read
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   321
		if (aScanData.scanMask & aScanData.EInsideUnit)
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   322
			{
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   323
			if (aScanData.scanMask & aScanData.EIsDelimiter)
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   324
				{
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   325
				aScanData.scanMask &=~aScanData.EInsideUnit;
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   326
				if (aScanData.scanMask & aScanData.EStopEnd)
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					break;
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   328
				}
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   329
			 }
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   330
		else
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   331
			{
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   332
			if (aScanData.scanMask & aScanData.EIsDelimiter)
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   333
				{
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   334
				if (!(aScanData.scanMask & EScanJoinDelimiters))
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   335
					break;
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   336
				}
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   337
	   		else
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   338
				{
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   339
				aScanData.scanMask |= aScanData.EInsideUnit;
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   340
				if (aScanData.scanMask & aScanData.EStopBegin)
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   341
					break;
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   342
				}
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   343
			}
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   344
		}
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   345
	TInt charsSkipped=(aScanData.scanMask & EScanBackwards)? aPos-aScanData.oldPos : 
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   346
										aScanData.oldPos-aPos;
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   347
	aPos=(aScanData.oldPos<(TInt)(iByteStore->Size()/sizeof(TText)))? aScanData.oldPos : EScanEndOfData;
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   348
	return charsSkipped;
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   349
	}
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   350
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   351
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   352
TBool CPlainText::TestForDelimiter(TUnitOfText aContext,SScanData& aScanData) const
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   353
/** Return ETrue if a character was read successfully.
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   354
Set EIsDelimiter flag if the character read
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   355
is a delimiter of the appropriate type.*/	
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   356
    {
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   357
	aScanData.scanMask |= aScanData.EIsDelimiter;
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   358
	aScanData.oldPos = aScanData.pos;
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   359
	TChar c;
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   360
	if (!GetChar(aScanData,c))
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   361
		return FALSE;
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   362
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   363
	TBool found = FALSE;
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   364
	if (aContext == EUnitIsParagraph)
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   365
		found = c == EParagraphDelimiter;
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   366
	else if (aContext == EUnitIsWord)
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   367
		{
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   368
		if (c == EParagraphDelimiter ||
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   369
			c == ELineBreak ||
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   370
			c == EPageBreak ||
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   371
			c == ESpace ||
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   372
			c == ETabCharacter)
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   373
			found = TRUE;
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   374
		if (!found && (aScanData.scanMask & EScanPictureIsDelimiter))
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   375
			{
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   376
			if (c == EPictureCharacter)
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   377
				found = TRUE;
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   378
			}
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   379
		if (!found)
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   380
			{
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   381
			TChar::TCategory cat = c.GetCategory();
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   382
			if (cat == TChar::EZsCategory) // it's a space
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   383
				found = TRUE;
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   384
			if (!found &&
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   385
				(aScanData.scanMask & EScanPunctuationIsDelimiter) &&
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   386
				(cat & TChar::EPunctuationGroup))
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   387
				{
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   388
				if (c != EHyphenMinus &&
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   389
					c != EApostrophe &&
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   390
					c != EPotentialHyphen &&
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   391
					c != EHyphen && 
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   392
					c != ERightSingleQuote)
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   393
					found = TRUE;
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   394
				}
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   395
			}
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   396
		}
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   397
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   398
	if (found)
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   399
		aScanData.scanMask |= aScanData.EIsDelimiter;
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   400
	else
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   401
		aScanData.scanMask &= ~aScanData.EIsDelimiter;
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   402
	return TRUE;
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   403
	}
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   404
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   405
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   406
TBool CPlainText::GetChar(SScanData& aScanData,TChar& aChar)const
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   407
// If there is one, write the next character to aChar, and return ETrue,
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   408
// otherwise return EFalse.
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   409
//
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   410
	{
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   411
	TPtrC view(_S("a"));  // Dummy value cos no default constructor.
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   412
	if (!aScanData.currentSegLen)	
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   413
		{//First time in, or new segment.
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   414
		if (!aScanData.totalBufLen)
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   415
			{//No data left to read.
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   416
			return EFalse;	
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   417
			}
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   418
		if (aScanData.delta < 0)
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   419
			{//Scanning backwards
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   420
			TPtrC8 tempView=iByteStore->BackPtr(aScanData.pos*sizeof(TText));
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   421
			view.Set((TText*)tempView.Ptr(),tempView.Length()/sizeof(TText));
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   422
			}
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   423
		else
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   424
			{//Scanning forwards
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   425
			TPtrC8 tempView=iByteStore->Ptr(aScanData.pos*sizeof(TText));
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   426
			view.Set((TText*)tempView.Ptr(),tempView.Length()/sizeof(TText));
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   427
			}//Ptr now returns a TDes.
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   428
		aScanData.currentSegLen=(TInt)Min(aScanData.totalBufLen,(TInt)view.Length());
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   429
		aScanData.totalBufLen-=aScanData.currentSegLen;
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   430
		aScanData.buf=(TText*)view.Ptr();
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   431
		if (aScanData.delta < 0)
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   432
			aScanData.buf+=aScanData.currentSegLen-1;
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   433
		}
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   434
	aChar=*(aScanData.buf);  // aChar takes the character just read.
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   435
	aScanData.buf+=aScanData.delta;  // pText increments correctly for both ASCII and Unicode
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   436
	aScanData.pos+=aScanData.delta;
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   437
	aScanData.currentSegLen-=1;  // len holds the number of chars left, for ASCII and Unicode
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   438
	return ETrue;
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   439
	}
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   440
1fb32624e06b Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   441