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/*=========================================================================
Program: Visualization Toolkit
Module: vtkTextCodec.h
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
/*-------------------------------------------------------------------------
Copyright 2008 Sandia Corporation.
Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
the U.S. Government retains certain rights in this software.
-------------------------------------------------------------------------*/
// .NAME vtkTextCodec - Virtual class to act as an interface for all text codecs
//
// .SECTION Description
// A virtual class interface for codecs that readers/writers can rely on
//
// .SECTION Thanks
// Thanks to Tim Shed from Sandia National Laboratories for his work
// on the concepts and to Marcus Hanwell and Jeff Baumes of Kitware for
// keeping me out of the weeds
//
// .SECTION See Also
// vtkTextCodecFactory
//
#ifndef vtkTextCodec_h
#define vtkTextCodec_h
#include "vtkIOCoreModule.h" // For export macro
#include "vtkObject.h"
#include "vtkUnicodeString.h" // for the value type and for function return.
class VTKIOCORE_EXPORT vtkTextCodec : public vtkObject
{
public:
vtkTypeMacro(vtkTextCodec, vtkObject);
// Description:
// The name this codec goes by - should match the string the factory will take
// to create it
virtual const char* Name();
void PrintSelf(ostream& os, vtkIndent indent);
virtual bool CanHandle(const char* NameString);
// Description:
// is the given sample valid for this codec? The stream will not be advanced.
virtual bool IsValid(istream& InputStream);
// Description:
// a base class that any output iterators need to derive from to use the first
// signature of to_unicode. Templates will not allow the vtable to
// re-reference to the correct class so even though we only need the interface
// we have to use derivation.
class OutputIterator
{
public:
virtual OutputIterator& operator++(int) = 0;
virtual OutputIterator& operator*() = 0;
virtual OutputIterator& operator=(const vtkUnicodeString::value_type value) = 0;
OutputIterator() {} virtual ~OutputIterator() {}
private:
OutputIterator(const OutputIterator&); // Not implemented
const OutputIterator& operator=(const OutputIterator&); // Not Implemented
};
// Description:
// Iterate through the sequence represented by the stream assigning the result
// to the output iterator. The stream will be advanced to its end so
// subsequent use would need to reset it.
virtual void ToUnicode(istream& InputStream,
vtkTextCodec::OutputIterator& output) = 0;
// Description:
// convinience method to take data from the stream and put it into a
// vtkUnicodeString.
vtkUnicodeString ToUnicode(istream & inputStream);
// Description:
// Return the next code point from the sequence represented by the stream
// advancing the stream through however many places needed to assemble that
// code point.
virtual vtkUnicodeString::value_type NextUnicode(istream& inputStream) = 0;
protected:
vtkTextCodec();
~vtkTextCodec();
private:
vtkTextCodec(const vtkTextCodec &); // Not implemented.
void operator=(const vtkTextCodec &); // Not implemented.
};
#endif
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