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306 | /* -*- 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/.
*/
#include <memory>
#include <config_folders.h>
#include <config_eot.h>
#include <osl/file.hxx>
#include <rtl/bootstrap.hxx>
#include <sal/log.hxx>
#include <vcl/svapp.hxx>
#include <vcl/embeddedfontshelper.hxx>
#include <com/sun/star/io/XInputStream.hpp>
#include <outdev.h>
#include <PhysicalFontCollection.hxx>
#include <salgdi.hxx>
#include <sft.hxx>
#if ENABLE_EOT
extern "C"
{
namespace libeot
{
#include <libeot/libeot.h>
} // namespace libeot
} // extern "C"
#endif
using namespace com::sun::star;
using namespace vcl;
static void clearDir( const OUString& path )
{
osl::Directory dir( path );
if( dir.reset() == osl::Directory::E_None )
{
for(;;)
{
osl::DirectoryItem item;
if( dir.getNextItem( item ) != osl::Directory::E_None )
break;
osl::FileStatus status( osl_FileStatus_Mask_FileURL );
if( item.getFileStatus( status ) == osl::File::E_None )
osl::File::remove( status.getFileURL());
}
}
}
void EmbeddedFontsHelper::clearTemporaryFontFiles()
{
OUString path = "${$BRAND_BASE_DIR/" LIBO_ETC_FOLDER "/" SAL_CONFIGFILE( "bootstrap") "::UserInstallation}";<--- There is an unknown macro here somewhere. Configuration is required. If SAL_CONFIGFILE is a macro then please configure it.
rtl::Bootstrap::expandMacros( path );
path += "/user/temp/embeddedfonts/";
clearDir( path + "fromdocs/" );
clearDir( path + "fromsystem/" );
}
bool EmbeddedFontsHelper::addEmbeddedFont( const uno::Reference< io::XInputStream >& stream, const OUString& fontName,
const char* extra, std::vector< unsigned char > key, bool eot )
{
OUString fileUrl = EmbeddedFontsHelper::fileUrlForTemporaryFont( fontName, extra );
osl::File file( fileUrl );
switch( file.open( osl_File_OpenFlag_Create | osl_File_OpenFlag_Write ))
{
case osl::File::E_None:
break; // ok
case osl::File::E_EXIST:
return true; // Assume it's already been added correctly.
default:
SAL_WARN( "vcl.fonts", "Cannot open file for temporary font" );
return false;
}
size_t keyPos = 0;
std::vector< char > fontData;
fontData.reserve( 1000000 );
for(;;)
{
uno::Sequence< sal_Int8 > buffer;
sal_uInt64 read = stream->readBytes( buffer, 1024 );
for( sal_uInt64 pos = 0;
pos < read && keyPos < key.size();
++pos )
buffer[ pos ] ^= key[ keyPos++ ];
// if eot, don't write the file out yet, since we need to unpack it first.
if( !eot && read > 0 )
{
sal_uInt64 writtenTotal = 0;
while( writtenTotal < read )
{
sal_uInt64 written;
file.write( buffer.getConstArray(), read, written );
writtenTotal += written;
}
}
fontData.insert( fontData.end(), buffer.getConstArray(), buffer.getConstArray() + read );
if( read <= 0 )
break;
}
bool sufficientFontRights(false);
#if ENABLE_EOT
if( eot )
{
unsigned uncompressedFontSize = 0;
unsigned char *nakedPointerToUncompressedFont = nullptr;
libeot::EOTMetadata eotMetadata;
libeot::EOTError uncompressError =
libeot::EOT2ttf_buffer( reinterpret_cast<unsigned char *>(fontData.data()), fontData.size(), &eotMetadata, &nakedPointerToUncompressedFont, &uncompressedFontSize );
std::shared_ptr<unsigned char> uncompressedFont( nakedPointerToUncompressedFont, libeot::EOTfreeBuffer );
if( uncompressError != libeot::EOT_SUCCESS )
{
SAL_WARN( "vcl.fonts", "Failed to uncompress font" );
osl::File::remove( fileUrl );
return false;
}
sal_uInt64 writtenTotal = 0;
while( writtenTotal < uncompressedFontSize )
{
sal_uInt64 written;
if( file.write( uncompressedFont.get() + writtenTotal, uncompressedFontSize - writtenTotal, written ) != osl::File::E_None )
{
SAL_WARN( "vcl.fonts", "Error writing temporary font file" );
osl::File::remove( fileUrl );
return false;
}
writtenTotal += written;
}
sufficientFontRights = libeot::EOTcanLegallyEdit( &eotMetadata );
libeot::EOTfreeMetadata( &eotMetadata );
}
#endif
if( file.close() != osl::File::E_None )
{
SAL_WARN( "vcl.fonts", "Writing temporary font file failed" );
osl::File::remove( fileUrl );
return false;
}
if( !eot )
{
sufficientFontRights = sufficientTTFRights(fontData.data(), fontData.size(), FontRights::EditingAllowed);
}
if( !sufficientFontRights )
{
// It would be actually better to open the document in read-only mode in this case,
// warn the user about this, and provide a button to drop the font(s) in order
// to switch to editing.
SAL_INFO( "vcl.fonts", "Ignoring embedded font that is not usable for editing" );
osl::File::remove( fileUrl );
return false;
}
EmbeddedFontsHelper::activateFont( fontName, fileUrl );
return true;
}
OUString EmbeddedFontsHelper::fileUrlForTemporaryFont( const OUString& fontName, const char* extra )
{
OUString path = "${$BRAND_BASE_DIR/" LIBO_ETC_FOLDER "/" SAL_CONFIGFILE( "bootstrap") "::UserInstallation}";
rtl::Bootstrap::expandMacros( path );
path += "/user/temp/embeddedfonts/fromdocs/";
osl::Directory::createPath( path );
OUString filename = fontName;
static int uniqueCounter = 0;
if( strcmp( extra, "?" ) == 0 )
filename += OUString::number( uniqueCounter++ );
else
filename += OStringToOUString( extra, RTL_TEXTENCODING_ASCII_US );
filename += ".ttf"; // TODO is it always ttf?
return path + filename;
}
void EmbeddedFontsHelper::activateFont( const OUString& fontName, const OUString& fileUrl )
{
OutputDevice *pDevice = Application::GetDefaultDevice();
pDevice->AddTempDevFont(fileUrl, fontName);
}
// Check if it's (legally) allowed to embed the font file into a document
// (ttf has a flag allowing this). PhysicalFontFace::IsEmbeddable() appears
// to have a different meaning (guessing from code, IsSubsettable() might
// possibly mean it's ttf, while IsEmbeddable() might mean it's type1).
// So just try to open the data as ttf and see.
bool EmbeddedFontsHelper::sufficientTTFRights( const void* data, long size, FontRights rights )
{
TrueTypeFont* font;
if( OpenTTFontBuffer( data, size, 0 /*TODO*/, &font ) == SFErrCodes::Ok )
{
TTGlobalFontInfo info;
GetTTGlobalFontInfo( font, &info );
CloseTTFont( font );
// https://www.microsoft.com/typography/otspec/os2.htm#fst
int copyright = info.typeFlags;
switch( rights )
{
case FontRights::ViewingAllowed:
// Embedding not restricted completely.
return ( copyright & 0x02 ) != 0x02;
case FontRights::EditingAllowed:
// Font is installable or editable.
return copyright == 0 || ( copyright & 0x08 );
}
}
return true; // no known restriction
}
OUString EmbeddedFontsHelper::fontFileUrl( const OUString& familyName, FontFamily family, FontItalic italic,
FontWeight weight, FontPitch pitch, FontRights rights )
{
OUString path = "${$BRAND_BASE_DIR/" LIBO_ETC_FOLDER "/" SAL_CONFIGFILE( "bootstrap") "::UserInstallation}";
rtl::Bootstrap::expandMacros( path );
path += "/user/temp/embeddedfonts/fromsystem/";
osl::Directory::createPath( path );
OUString filename = familyName + "_" + OUString::number( family ) + "_" + OUString::number( italic )
+ "_" + OUString::number( weight ) + "_" + OUString::number( pitch )
+ ".ttf"; // TODO is it always ttf?
OUString url = path + filename;
if( osl::File( url ).open( osl_File_OpenFlag_Read ) == osl::File::E_None ) // = exists()
{
// File with contents of the font file already exists, assume it's been created by a previous call.
return url;
}
bool ok = false;
SalGraphics* graphics = Application::GetDefaultDevice()->GetGraphics();
PhysicalFontCollection fonts;
graphics->GetDevFontList( &fonts );
std::unique_ptr< ImplDeviceFontList > fontInfo( fonts.GetDeviceFontList());
PhysicalFontFace* selected = nullptr;
for( int i = 0;
i < fontInfo->Count();
++i )
{
PhysicalFontFace* f = fontInfo->Get( i );
if( f->GetFamilyName() == familyName )
{
// Ignore comparing text encodings, at least for now. They cannot be trivially compared
// (e.g. UCS2 and UTF8 are technically the same characters, just have different encoding,
// and just having a unicode font doesn't say what glyphs it actually contains).
// It is possible that it still may be needed to do at least some checks here
// for some encodings (can one font have more font files for more encodings?).
if(( family == FAMILY_DONTKNOW || f->GetFamilyType() == family )
&& ( italic == ITALIC_DONTKNOW || f->GetItalic() == italic )
&& ( weight == WEIGHT_DONTKNOW || f->GetWeight() == weight )
&& ( pitch == PITCH_DONTKNOW || f->GetPitch() == pitch ))
{ // Exact match, return it immediately.
selected = f;
break;
}
if(( f->GetFamilyType() == FAMILY_DONTKNOW || family == FAMILY_DONTKNOW || f->GetFamilyType() == family )
&& ( f->GetItalic() == ITALIC_DONTKNOW || italic == ITALIC_DONTKNOW || f->GetItalic() == italic )
&& ( f->GetWeight() == WEIGHT_DONTKNOW || weight == WEIGHT_DONTKNOW || f->GetWeight() == weight )
&& ( f->GetPitch() == PITCH_DONTKNOW || pitch == PITCH_DONTKNOW || f->GetPitch() == pitch ))
{ // Some fonts specify 'DONTKNOW' for some things, still a good match, if we don't find a better one.
selected = f;
}
}
}
if( selected != nullptr )
{
long size;
if (const void* data = graphics->GetEmbedFontData(selected, &size))
{
if( sufficientTTFRights( data, size, rights ))
{
osl::File file( url );
if( file.open( osl_File_OpenFlag_Write | osl_File_OpenFlag_Create ) == osl::File::E_None )
{
sal_uInt64 written = 0;
sal_uInt64 totalSize = size;
bool error = false;
while( written < totalSize && !error)
{
sal_uInt64 nowWritten;
switch( file.write( static_cast< const char* >( data ) + written, size - written, nowWritten ))
{
case osl::File::E_None:
written += nowWritten;
break;
case osl::File::E_AGAIN:
case osl::File::E_INTR:
break;
default:
error = true;
break;
}
}
file.close();
if( error )
osl::File::remove( url );
else
ok = true;
}
}
graphics->FreeEmbedFontData( data, size );
}
}
return ok ? url : "";
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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