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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 .
*/
#include <unx/geninst.h>
#include <outdev.h>
#include <unx/fontmanager.hxx>
#include <PhysicalFontCollection.hxx>
// platform specific font substitution hooks
namespace {
class FcPreMatchSubstitution
: public ImplPreMatchFontSubstitution
{
public:
bool FindFontSubstitute( FontSelectPattern& ) const override;
typedef ::std::pair<FontSelectPattern, FontSelectPattern> value_type;
private:
typedef ::std::list<value_type> CachedFontMapType;
mutable CachedFontMapType maCachedFontMap;
};
class FcGlyphFallbackSubstitution
: public ImplGlyphFallbackFontSubstitution
{
// TODO: add a cache
public:
bool FindFontSubstitute(FontSelectPattern&, LogicalFontInstance* pLogicalFont, OUString& rMissingCodes) const override;
};
}
void SalGenericInstance::RegisterFontSubstitutors( PhysicalFontCollection* pFontCollection )
{
// register font fallback substitutions
static FcPreMatchSubstitution aSubstPreMatch;
pFontCollection->SetPreMatchHook( &aSubstPreMatch );
// register glyph fallback substitutions
static FcGlyphFallbackSubstitution aSubstFallback;
pFontCollection->SetFallbackHook( &aSubstFallback );
}
static FontSelectPattern GetFcSubstitute(const FontSelectPattern &rFontSelData, OUString& rMissingCodes)
{
FontSelectPattern aSubstituted(rFontSelData);
psp::PrintFontManager& rMgr = psp::PrintFontManager::get();
rMgr.Substitute(aSubstituted, rMissingCodes);
return aSubstituted;
}
namespace
{
bool uselessmatch(const FontSelectPattern &rOrig, const FontSelectPattern &rNew)
{
return
(
rOrig.maTargetName == rNew.maSearchName &&
rOrig.GetWeight() == rNew.GetWeight() &&
rOrig.GetItalic() == rNew.GetItalic() &&
rOrig.GetPitch() == rNew.GetPitch() &&
rOrig.GetWidthType() == rNew.GetWidthType()
);
}
class equal
{
private:
const FontSelectPattern& mrAttributes;
public:
explicit equal(const FontSelectPattern& rAttributes)
: mrAttributes(rAttributes)
{
}
bool operator()(const FcPreMatchSubstitution::value_type& rOther) const
{ return rOther.first == mrAttributes; }
};
}
bool FcPreMatchSubstitution::FindFontSubstitute(FontSelectPattern &rFontSelData) const
{
// We don't actually want to talk to Fontconfig at all for symbol fonts
if( rFontSelData.IsSymbolFont() )
return false;
// StarSymbol is a unicode font, but it still deserves the symbol flag
if ( IsStarSymbol(rFontSelData.maSearchName) )
return false;
//see fdo#41556 and fdo#47636
//fontconfig can return e.g. an italic font for a non-italic input and/or
//different fonts depending on fontsize, bold, etc settings so don't cache
//just on the name, cache map all the input and all the output not just map
//from original selection to output fontname
FontSelectPattern& rPatternAttributes = rFontSelData;
CachedFontMapType &rCachedFontMap = maCachedFontMap;
CachedFontMapType::iterator itr = std::find_if(rCachedFontMap.begin(), rCachedFontMap.end(), equal(rPatternAttributes));
if (itr != rCachedFontMap.end())
{
// Cached substitution
rFontSelData = itr->second;
if (itr != rCachedFontMap.begin())
{
// MRU, move it to the front
rCachedFontMap.splice(rCachedFontMap.begin(), rCachedFontMap, itr);
}
return true;
}
OUString aDummy;
const FontSelectPattern aOut = GetFcSubstitute( rFontSelData, aDummy );
if( aOut.maSearchName.isEmpty() )
return false;
const bool bHaveSubstitute = !uselessmatch( rFontSelData, aOut );
#ifdef DEBUG
std::ostringstream oss;
oss << "FcPreMatchSubstitution \""
<< rFontSelData.maTargetName
<< "\" bipw="
<< rFontSelData.GetWeight()
<< rFontSelData.GetItalic()
<< rFontSelData.GetPitch()
<< rFontSelData.GetWidthType()
<< " -> ";
if( !bHaveSubstitute )
oss << "no substitute available.";
else
oss << "\""
<< aOut.maSearchName
<< "\" bipw="
<< aOut.GetWeight()
<< aOut.GetItalic()
<< aOut.GetPitch()
<< aOut.GetWidthType();
SAL_INFO("vcl.fonts", oss.str());
#endif
if( bHaveSubstitute )
{
rCachedFontMap.push_front(value_type(rFontSelData, aOut));
// Fairly arbitrary limit in this case, but I recall measuring max 8
// fonts as the typical max amount of fonts in medium sized documents, so make it
// a fair chunk larger to accommodate weird documents./
if (rCachedFontMap.size() > 256)
rCachedFontMap.pop_back();
rFontSelData = aOut;
}
return bHaveSubstitute;
}
bool FcGlyphFallbackSubstitution::FindFontSubstitute(FontSelectPattern& rFontSelData,
LogicalFontInstance* /*pLogicalFont*/,
OUString& rMissingCodes ) const
{
// We don't actually want to talk to Fontconfig at all for symbol fonts
if( rFontSelData.IsSymbolFont() )
return false;
// StarSymbol is a unicode font, but it still deserves the symbol flag
if ( IsStarSymbol(rFontSelData.maSearchName) )
return false;
const FontSelectPattern aOut = GetFcSubstitute( rFontSelData, rMissingCodes );
// TODO: cache the unicode + srcfont specific result
// FC doing it would be preferable because it knows the invariables
// e.g. FC knows the FC rule that all Arial gets replaced by LiberationSans
// whereas we would have to check for every size or attribute
if( aOut.maSearchName.isEmpty() )
return false;
const bool bHaveSubstitute = !uselessmatch( rFontSelData, aOut );
#ifdef DEBUG
std::ostringstream oss;
oss << "FcGFSubstitution \""
<< rFontSelData.maTargetName
<< "\" bipw="
<< rFontSelData.GetWeight()
<< rFontSelData.GetItalic()
<< rFontSelData.GetPitch()
<< rFontSelData.GetWidthType()
<< " -> ";
if( !bHaveSubstitute )
oss << "no substitute available.";
else
oss << "\""
<< aOut.maSearchName
<< "\" bipw="
<< aOut.GetWeight()
<< aOut.GetItalic()
<< aOut.GetPitch()
<< aOut.GetWidthType();
SAL_INFO("vcl.fonts", oss.str());
#endif
if( bHaveSubstitute )
rFontSelData = aOut;
return bHaveSubstitute;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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