gecko-dev/layout/generic/nsTextTransformer.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and limitations
* under the License.
*
* The Original Code is Mozilla Communicator client code.
*
* The Initial Developer of the Original Code is Netscape Communications
* Corporation. Portions created by Netscape are Copyright (C) 1998
* Netscape Communications Corporation. All Rights Reserved.
*/
#ifndef nsTextTransformer_h___
#define nsTextTransformer_h___
#include "nsTextFragment.h"
#include "nsISupports.h"
class nsIFrame;
class nsTextRun;
/**
* This object manages the transformation of text:
*
* <UL>
* <LI>whitespace compression
* <LI>capitalization
* <LI>lowercasing
* <LI>uppercasing
* </UL>
*
* Note that no transformations are applied that would impact word
* breaking (like mapping &nbsp; into space, for example). In
* addition, this logic will not strip leading or trailing whitespace
* (across the entire run of text; leading whitespace can be skipped
* for a frames text because of whitespace compression).
*/
class nsTextTransformer {
public:
nsTextTransformer(PRUnichar* aBuffer, PRInt32 aBufLen);
~nsTextTransformer();
/**
* Initialize the text transform. This is when the transformation
* occurs. Subsequent calls to GetTransformedTextFor will just
* return the result of the single transformation.
*/
nsresult Init(/*nsTextRun& aTextRun, XXX*/
nsIFrame* aFrame,
PRInt32 aStartingOffset);
PRInt32 GetContentLength() const {
return mContentLength;
}
PRUnichar* GetNextWord(PRBool aInWord,
PRInt32& aWordLenResult,
PRInt32& aContentLenResult,
PRBool& aIsWhitespaceResult);
PRBool HasMultibyte() const {
return mHasMultibyte;
}
PRUnichar* GetTextAt(PRInt32 aOffset);
protected:
PRBool GrowBuffer();
PRUnichar* mAutoBuffer;
PRUnichar* mBuffer;
PRInt32 mBufferLength;
PRBool mHasMultibyte;
PRInt32 mContentLength;
PRInt32 mStartingOffset;
PRInt32 mOffset;
const nsTextFragment* mFrags;
PRInt32 mNumFrags;
const nsTextFragment* mCurrentFrag;
PRInt32 mCurrentFragOffset;
PRUint8 mTextTransform;
PRUint8 mWhiteSpace;
};
#endif /* nsTextTransformer_h___ */