author | hgs |
Mon, 12 Jul 2010 14:38:26 +0800 | |
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/* |
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* Copyright (c) 2002-2009 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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#ifndef TMCHUNKINTERP_H_ |
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#define TMCHUNKINTERP_H_ |
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#include "TMINTERP.H" |
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/** |
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* Interpreter for finding text chunks adjoining a given document position. |
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* @internalComponent |
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*/ |
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class TTmChunkInterpreter : public TTmInterpreter |
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{ |
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public: |
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enum TContainment |
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{ |
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ENotInChunk = 0, |
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ELeftEdgeOfChunk = 1, |
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ERightEdgeOfChunk = 2, |
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EMiddleOfChunk = 3 |
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}; |
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TTmChunkInterpreter(const CTmTextLayout& aTextLayout); |
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/** |
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* Sets the iteration to the leftmost chunk of the line containing aDocPos. |
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* @return |
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* ETrue if this succeeded, EFalse if the line is not formatted, or |
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* contains no text. |
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*/ |
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TBool ChunkSetToLeftOfLine(const TTmDocPosSpec& aDocPos); |
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/** |
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* Returns the first character position in the current chunk. |
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*/ |
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TInt ChunkStart() const { return iStart; } |
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/** |
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* Returns one past the last character position in the current chunk. |
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*/ |
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TInt ChunkEnd() const { return iEnd; } |
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/** |
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* Returns ETrue if the current chunk is displayed right-to-left. |
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*/ |
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TBool ChunkRightToLeft() const { return iRightToLeft; } |
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/** |
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* Returns whether aDocPos is in the chunk or not, and if so where in the |
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* chunk it is. |
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*/ |
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TContainment ChunkContainsPos(const TTmDocPosSpec& aDocPos) const; |
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/** |
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* Moves to the next chunk right within this line. |
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* @return |
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* ETrue if there is such a chunk, EFalse if the end of the line was |
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* reached, so no chunk could be found. |
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*/ |
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TBool ChunkNext(); |
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private: |
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TInt iStart; |
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TInt iEnd; |
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TBool iRightToLeft; |
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}; |
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#endif |