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/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
#ifndef _SV_GRAPHITETEXTSRC_HXX
#define _SV_GRAPHITETEXTSRC_HXX
// Description: Implements the Graphite interfaces IGrTextSource and
// IGrGraphics which provide Graphite with access to the
// app's text storage system and the platform's font and
// graphics systems.
// We need this to enable namespace support in libgrengine headers.
#define GR_NAMESPACE
// Standard Library
#include <stdexcept>
// Platform
#ifndef _SVWIN_H
#include <tools/svwin.h>
#endif
#ifndef _SV_SVSYS_HXX
#include <svsys.h>
#endif
#ifndef _SV_SALGDI_HXX
#include <vcl/salgdi.hxx>
#endif
#ifndef _SV_SALLAYOUT_HXX
#include <vcl/sallayout.hxx>
#endif
// Module
#include "vcl/dllapi.h"
// Libraries
#include <preextstl.h>
#include <graphite/GrClient.h>
#include <graphite/Font.h>
#include <graphite/ITextSource.h>
#include <postextstl.h>
// Module type definitions and forward declarations.
//
namespace grutils
{
class GrFeatureParser;
}
// Implements the Adaptor pattern to adapt the LayoutArgs and the ServerFont interfaces to the
// gr::IGrTextSource interface.
// @author tse
//
class TextSourceAdaptor : public gr::ITextSource
{
public:
TextSourceAdaptor(ImplLayoutArgs &layout_args, const int nContextLen) throw();
~TextSourceAdaptor();
virtual gr::UtfType utfEncodingForm();
virtual size_t getLength();
virtual size_t fetch(gr::toffset ichMin, size_t cch, gr::utf32 * prgchBuffer);
virtual size_t fetch(gr::toffset ichMin, size_t cch, gr::utf16 * prgchwBuffer);
virtual size_t fetch(gr::toffset ichMin, size_t cch, gr::utf8 * prgchsBuffer);
virtual bool getRightToLeft(gr::toffset ich);
virtual unsigned int getDirectionDepth(gr::toffset ich);
virtual float getVerticalOffset(gr::toffset ich);
virtual gr::isocode getLanguage(gr::toffset ich);
virtual ext_std::pair<gr::toffset, gr::toffset> propertyRange(gr::toffset ich);
virtual size_t getFontFeatures(gr::toffset ich, gr::FeatureSetting * prgfset);
virtual bool sameSegment(gr::toffset ich1, gr::toffset ich2);
operator ImplLayoutArgs & () throw();
void setFeatures(const grutils::GrFeatureParser * pFeatures);
const ImplLayoutArgs & getLayoutArgs() const { return maLayoutArgs; }
size_t getContextLength() const { return mnEnd; };
inline void switchLayoutArgs(ImplLayoutArgs & newArgs);
private:
// Prevent the generation of a default assignment operator.
TextSourceAdaptor & operator=(const TextSourceAdaptor &);
void getCharProperties(const int, int &, int &, size_t &);
ImplLayoutArgs maLayoutArgs;
size_t mnEnd;
const grutils::GrFeatureParser * mpFeatures;
};
inline TextSourceAdaptor::TextSourceAdaptor(ImplLayoutArgs &la, const int nContextLen) throw()
: maLayoutArgs(la),
mnEnd(std::min(la.mnLength, nContextLen)),
mpFeatures(NULL)
{
}
inline TextSourceAdaptor::operator ImplLayoutArgs & () throw() {
return maLayoutArgs;
}
inline void TextSourceAdaptor::switchLayoutArgs(ImplLayoutArgs & aNewArgs)
{
mnEnd += aNewArgs.mnMinCharPos - maLayoutArgs.mnMinCharPos;
maLayoutArgs = aNewArgs;
}
#endif
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