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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/.
*/
#include "i18npool/languagetag.hxx"
#include "i18npool/mslangid.hxx"
#include <rtl/ustrbuf.hxx>
#include <rtl/bootstrap.hxx>
#include <osl/file.hxx>
//#define erDEBUG
#if defined(ENABLE_LIBLANGTAG)
#include <liblangtag/langtag.h>
#else
/* Replacement code for LGPL phobic and Android systems.
* For iOS we could probably use NSLocale instead, that should have more or
* less required functionality. If it is good enough, it could be used for Mac
* OS X, too.
*/
#include "simple-langtag.cxx"
#endif
using rtl::OUString;
using rtl::OString;
using rtl::OUStringBuffer;
using namespace com::sun::star;
// The actual pointer type of mpImplLangtag that is declared void* to not
// pollute the entire code base with liblangtag.
#define LANGTAGCAST(p) (reinterpret_cast<lt_tag_t*>(p))
#define MPLANGTAG LANGTAGCAST(mpImplLangtag)
/** Convention to signal presence of BCP 47 language tag in a Locale's Variant
field. The Locale's Language field then will contain this ISO 639-2
reserved for local use code. */
#define ISO639_LANGUAGE_TAG "qlt"
/** A reference holder for liblangtag data de/initialization, one static
instance. Currently implemented such that the first "ref" inits and dtor
(our library deinitialized) tears down.
*/
class LiblantagDataRef
{
public:
LiblantagDataRef();
~LiblantagDataRef();
inline void incRef()
{
if (mnRef != SAL_MAX_UINT32 && !mnRef++)
setup();
}
inline void decRef()
{
if (mnRef != SAL_MAX_UINT32 && mnRef && !--mnRef)
teardown();
}
void presetDataPath( const rtl::OUString& rPath );
private:
rtl::OString maDataPath; // path to liblangtag data, "|" if system
sal_uInt32 mnRef;
void setupDataPath();
void setup();
void teardown();
};
static LiblantagDataRef theDataRef;
LiblantagDataRef::LiblantagDataRef()
:
mnRef(0)
{
}
LiblantagDataRef::~LiblantagDataRef()
{
// When destructed we're tearing down unconditionally.
if (mnRef)
mnRef = 1;
decRef();
}
void LiblantagDataRef::setup()
{
if (maDataPath.isEmpty())
setupDataPath();
lt_db_initialize();
// Hold ref eternally.
mnRef = SAL_MAX_UINT32;
}
void LiblantagDataRef::teardown()
{
lt_db_finalize();
}
void LiblantagDataRef::presetDataPath( const rtl::OUString& rPath )
{
if (maDataPath.isEmpty())
{
maDataPath = OUStringToOString( rPath, RTL_TEXTENCODING_UTF8);
lt_db_set_datadir( maDataPath.getStr());
}
}
void LiblantagDataRef::setupDataPath()
{
// maDataPath is assumed to be empty here.
OUString aURL;
if (!rtl::Bootstrap::get("BRAND_BASE_DIR", aURL) && !rtl::Bootstrap::get("LIBLANGTAG_SHARE", aURL))
OSL_FAIL( "LiblantagDataRef: can't get BRAND_BASE_DIR");
else
{
// Check if data is in our own installation, else assume system
// installation.
aURL += "/share/liblangtag";
OUString aData( aURL);
aData += "/language-subtag-registry.xml";
osl::DirectoryItem aDirItem;
if (osl::DirectoryItem::get( aData, aDirItem) == osl::DirectoryItem::E_None)
{
OUString aPath;
if (osl::FileBase::getSystemPathFromFileURL( aURL, aPath) == osl::FileBase::E_None)
maDataPath = OUStringToOString( aPath, RTL_TEXTENCODING_UTF8);
}
}
if (maDataPath.isEmpty())
maDataPath = "|"; // assume system
else
lt_db_set_datadir( maDataPath.getStr());
}
LanguageTag::LanguageTag( const rtl::OUString & rBcp47LanguageTag, bool bCanonicalize )
:
maBcp47( rBcp47LanguageTag),
mpImplLangtag( NULL),
mnLangID( LANGUAGE_DONTKNOW),
meIsValid( DECISION_DONTKNOW),
meIsIsoLocale( DECISION_DONTKNOW),
meIsIsoODF( DECISION_DONTKNOW),
mbInitializedBcp47( true),
mbInitializedLocale( false),
mbInitializedLangID( false),
mbCachedLanguage( false),
mbCachedScript( false),
mbCachedCountry( false)
{
theDataRef.incRef();
if (bCanonicalize)
canonicalize();
}
LanguageTag::LanguageTag( const com::sun::star::lang::Locale & rLocale )
:
maLocale( rLocale),
mpImplLangtag( NULL),
mnLangID( LANGUAGE_DONTKNOW),
meIsValid( DECISION_DONTKNOW),
meIsIsoLocale( DECISION_DONTKNOW),
meIsIsoODF( DECISION_DONTKNOW),
mbInitializedBcp47( false),
mbInitializedLocale( true),
mbInitializedLangID( false),
mbCachedLanguage( false),
mbCachedScript( false),
mbCachedCountry( false)
{
theDataRef.incRef();
}
LanguageTag::LanguageTag( LanguageType nLanguage )
:
mpImplLangtag( NULL),
mnLangID( nLanguage),
meIsValid( DECISION_DONTKNOW),
meIsIsoLocale( DECISION_DONTKNOW),
meIsIsoODF( DECISION_DONTKNOW),
mbInitializedBcp47( false),
mbInitializedLocale( false),
mbInitializedLangID( true),
mbCachedLanguage( false),
mbCachedScript( false),
mbCachedCountry( false)
{
theDataRef.incRef();
}
LanguageTag::LanguageTag( const rtl::OUString& rLanguage, const rtl::OUString& rCountry )
:
maLocale( rLanguage, rCountry, ""),
mpImplLangtag( NULL),
mnLangID( LANGUAGE_DONTKNOW),
meIsValid( DECISION_DONTKNOW),
meIsIsoLocale( DECISION_DONTKNOW),
meIsIsoODF( DECISION_DONTKNOW),
mbInitializedBcp47( false),
mbInitializedLocale( true),
mbInitializedLangID( false),
mbCachedLanguage( false),
mbCachedScript( false),
mbCachedCountry( false)
{
theDataRef.incRef();
}
LanguageTag::LanguageTag( const LanguageTag & rLanguageTag )
:
maLocale( rLanguageTag.maLocale),
maBcp47( rLanguageTag.maBcp47),
maCachedLanguage( rLanguageTag.maCachedLanguage),
maCachedScript( rLanguageTag.maCachedScript),
maCachedCountry( rLanguageTag.maCachedCountry),
mpImplLangtag( rLanguageTag.mpImplLangtag ?
lt_tag_copy( LANGTAGCAST( rLanguageTag.mpImplLangtag)) : NULL),
mnLangID( rLanguageTag.mnLangID),
meIsValid( rLanguageTag.meIsValid),
meIsIsoLocale( rLanguageTag.meIsIsoLocale),
meIsIsoODF( rLanguageTag.meIsIsoODF),
mbInitializedBcp47( rLanguageTag.mbInitializedBcp47),
mbInitializedLocale( rLanguageTag.mbInitializedLocale),
mbInitializedLangID( rLanguageTag.mbInitializedLangID),
mbCachedLanguage( rLanguageTag.mbCachedLanguage),
mbCachedScript( rLanguageTag.mbCachedScript),
mbCachedCountry( rLanguageTag.mbCachedCountry)
{
theDataRef.incRef();
}
LanguageTag& LanguageTag::operator=( const LanguageTag & rLanguageTag )
{
maLocale = rLanguageTag.maLocale;
maBcp47 = rLanguageTag.maBcp47;
maCachedLanguage = rLanguageTag.maCachedLanguage;
maCachedScript = rLanguageTag.maCachedScript;
maCachedCountry = rLanguageTag.maCachedCountry;
mpImplLangtag = rLanguageTag.mpImplLangtag;
mpImplLangtag = rLanguageTag.mpImplLangtag ?
lt_tag_copy( LANGTAGCAST( rLanguageTag.mpImplLangtag)) : NULL;
mnLangID = rLanguageTag.mnLangID;
meIsValid = rLanguageTag.meIsValid;
meIsIsoLocale = rLanguageTag.meIsIsoLocale;
meIsIsoODF = rLanguageTag.meIsIsoODF;
mbInitializedBcp47 = rLanguageTag.mbInitializedBcp47;
mbInitializedLocale = rLanguageTag.mbInitializedLocale;
mbInitializedLangID = rLanguageTag.mbInitializedLangID;
mbCachedLanguage = rLanguageTag.mbCachedLanguage;
mbCachedScript = rLanguageTag.mbCachedScript;
mbCachedCountry = rLanguageTag.mbCachedCountry;
return *this;
}
LanguageTag::~LanguageTag()
{
lt_tag_unref( MPLANGTAG);
theDataRef.decRef();
}
bool LanguageTag::canonicalize() const
{
#ifdef erDEBUG
// dump once
struct dumper
{
void** mpp;
dumper( void** pp ) : mpp( *pp ? NULL : pp) {}
~dumper() { if (mpp && *mpp) lt_tag_dump( LANGTAGCAST( *mpp)); }
};
dumper aDumper( &mpImplLangtag);
#endif
getBcp47(); // side effect: have maBcp47 in any case
// Checking empty for system locale before having allocated mpImplLangtag
// may result in multiple calls of this method because that serves as flag
// whether this was canonicalized, but that's better than allocating
// lt_tag_t for all those system locales.
if (maBcp47.isEmpty())
{
meIsValid = DECISION_YES;
return true;
}
if (!mpImplLangtag)
mpImplLangtag = lt_tag_new();
// ensure error is free'd
struct myerror
{
lt_error_t* p;
myerror() : p(NULL) {}
~myerror() { if (p) lt_error_unref( p); }
} aError;
if (lt_tag_parse( MPLANGTAG, OUStringToOString( maBcp47, RTL_TEXTENCODING_UTF8).getStr(), &aError.p))
{
char* pTag = lt_tag_canonicalize( MPLANGTAG, &aError.p);
SAL_WARN_IF( !pTag, "i18npool.langtag", "LanguageTag::canonicalize: could not canonicalize " << maBcp47);
if (pTag)
{
OUString aOld( maBcp47);
maBcp47 = OUString::createFromAscii( pTag);
// Make the lt_tag_t follow the new string if different, which
// removes default script and such.
if (maBcp47 != aOld)
{
if (!lt_tag_parse( MPLANGTAG, pTag, &aError.p))
{
SAL_WARN( "i18npool.langtag", "LanguageTag::canonicalize: could not reparse " << maBcp47);
free( pTag);
meIsValid = DECISION_NO;
return false;
}
}
free( pTag);
meIsValid = DECISION_YES;
return true;
}
}
else
{
SAL_INFO( "i18npool.langtag", "LanguageTag::canonicalize: could not parse " << maBcp47);
}
meIsValid = DECISION_NO;
return false;
}
void LanguageTag::convertLocaleToBcp47()
{
if (maLocale.Language.isEmpty())
{
// Special case system locale.
maBcp47 = OUString();
meIsIsoLocale = DECISION_YES;
}
else if (maLocale.Language == ISO639_LANGUAGE_TAG)
{
maBcp47 = maLocale.Variant;
meIsIsoLocale = DECISION_NO;
}
else
{
/* XXX NOTE: most legacy code never evaluated the Variant field, so for
* now just concatenate language and country. In case we stumbled over
* variant aware code we'd have to take care of that. */
if (maLocale.Country.isEmpty())
maBcp47 = maLocale.Language;
else
{
OUStringBuffer aBuf( maLocale.Language.getLength() + 1 + maLocale.Country.getLength());
aBuf.append( maLocale.Language).append( '-').append( maLocale.Country);
maBcp47 = aBuf.makeStringAndClear();
}
}
mbInitializedBcp47 = true;
}
void LanguageTag::convertLocaleToLang()
{
/* FIXME: this is temporary until code base is converted to not use
* MsLangId::convert...() anymore. After that, proper new method has to be
* implemented to allow ISO639_LANGUAGE_TAG and sript tag and such. */
mnLangID = MsLangId::convertLocaleToLanguage( maLocale);
mbInitializedLangID = true;
}
void LanguageTag::convertBcp47ToLocale()
{
if (maBcp47.isEmpty())
{
// Special case system locale.
maLocale = lang::Locale();
meIsIsoLocale = DECISION_YES;
}
else
{
bool bIso = isIsoLocale();
if (bIso)
{
maLocale.Language = getLanguageFromLangtag();
maLocale.Country = getRegionFromLangtag();
maLocale.Variant = OUString();
}
else
{
maLocale.Language = ISO639_LANGUAGE_TAG;
maLocale.Country = getCountry();
maLocale.Variant = maBcp47;
}
}
mbInitializedLocale = true;
}
void LanguageTag::convertBcp47ToLang()
{
/* FIXME: this is temporary. If we support locales that consist not only of
* language and country, e.g. added script, this probably needs to be
* adapted. */
if (!mbInitializedLocale)
convertBcp47ToLocale();
convertLocaleToLang();
mbInitializedLangID = true;
}
void LanguageTag::convertLangToLocale()
{
/* FIXME: this is temporary until code base is converted to not use
* MsLangId::convert...() anymore. After that, proper new method has to be
* implemented to allow ISO639_LANGUAGE_TAG and script tag and such. */
// Do not resolve system here!
maLocale = MsLangId::convertLanguageToLocale( mnLangID, false);
mbInitializedLocale = true;
}
void LanguageTag::convertLangToBcp47()
{
/* FIXME: this is temporary. If we support locales that consist not only of
* language and country, e.g. added script, this probably needs to be
* adapted. */
if (!mbInitializedLocale)
convertLangToLocale();
convertLocaleToBcp47();
mbInitializedBcp47 = true;
}
rtl::OUString LanguageTag::getBcp47() const
{
if (!mbInitializedBcp47)
{
if (mbInitializedLocale)
const_cast<LanguageTag*>(this)->convertLocaleToBcp47();
else
const_cast<LanguageTag*>(this)->convertLangToBcp47();
}
return maBcp47;
}
rtl::OUString LanguageTag::getLanguageFromLangtag() const
{
rtl::OUString aLanguage;
if (!mpImplLangtag)
canonicalize();
if (maBcp47.isEmpty())
return aLanguage;
const lt_lang_t* pLangT = lt_tag_get_language( MPLANGTAG);
SAL_WARN_IF( !pLangT, "i18npool.langtag", "LanguageTag::getLanguageFromLangtag: pLangT==NULL");
if (!pLangT)
return aLanguage;
const char* pLang = lt_lang_get_tag( pLangT);
SAL_WARN_IF( !pLang, "i18npool.langtag", "LanguageTag::getLanguageFromLangtag: pLang==NULL");
if (pLang)
aLanguage = OUString::createFromAscii( pLang);
return aLanguage;
}
rtl::OUString LanguageTag::getScriptFromLangtag() const
{
rtl::OUString aScript;
if (!mpImplLangtag)
canonicalize();
if (maBcp47.isEmpty())
return aScript;
const lt_script_t* pScriptT = lt_tag_get_script( MPLANGTAG);
// pScriptT==NULL is valid for default scripts
if (!pScriptT)
return aScript;
const char* pScript = lt_script_get_tag( pScriptT);
SAL_WARN_IF( !pScript, "i18npool.langtag", "LanguageTag::getScriptFromLangtag: pScript==NULL");
if (pScript)
aScript = OUString::createFromAscii( pScript);
return aScript;
}
rtl::OUString LanguageTag::getRegionFromLangtag() const
{
rtl::OUString aRegion;
if (!mpImplLangtag)
canonicalize();
if (maBcp47.isEmpty())
return aRegion;
const lt_region_t* pRegionT = lt_tag_get_region( MPLANGTAG);
SAL_WARN_IF( !pRegionT, "i18npool.langtag", "LanguageTag::getRegionFromLangtag: pRegionT==NULL");
if (!pRegionT)
return aRegion;
const char* pRegion = lt_region_get_tag( pRegionT);
SAL_WARN_IF( !pRegion, "i18npool.langtag", "LanguageTag::getRegionFromLangtag: pRegion==NULL");
if (pRegion)
aRegion = OUString::createFromAscii( pRegion);
return aRegion;
}
com::sun::star::lang::Locale LanguageTag::getLocale() const
{
if (!mbInitializedLocale)
{
if (mbInitializedBcp47)
const_cast<LanguageTag*>(this)->convertBcp47ToLocale();
else
const_cast<LanguageTag*>(this)->convertLangToLocale();
}
return maLocale;
}
LanguageType LanguageTag::getLanguageType() const
{
if (!mbInitializedLangID)
{
if (mbInitializedBcp47)
const_cast<LanguageTag*>(this)->convertBcp47ToLang();
else
const_cast<LanguageTag*>(this)->convertLocaleToLang();
}
return mnLangID;
}
namespace
{
bool isLowerAscii( sal_Unicode c )
{
return 'a' <= c && c <= 'z';
}
bool isUpperAscii( sal_Unicode c )
{
return 'A' <= c && c <= 'Z';
}
}
// static
bool LanguageTag::isIsoLanguage( const rtl::OUString& rLanguage )
{
/* TODO: ignore case? For now let's see where rubbish is used. */
bool b2chars;
if (((b2chars = (rLanguage.getLength() == 2)) || rLanguage.getLength() == 3) &&
isLowerAscii( rLanguage[0]) && isLowerAscii( rLanguage[1]) &&
(b2chars || isLowerAscii( rLanguage[2])))
return true;
SAL_WARN_IF( ((rLanguage.getLength() == 2 || rLanguage.getLength() == 3) &&
(isUpperAscii( rLanguage[0]) || isUpperAscii( rLanguage[1]))) ||
(rLanguage.getLength() == 3 && isUpperAscii( rLanguage[2])), "i18npool.langtag",
"LanguageTag::isIsoLanguage: rejecting upper case");
return false;
}
// static
bool LanguageTag::isIsoCountry( const rtl::OUString& rRegion )
{
/* TODO: ignore case? For now let's see where rubbish is used. */
if (rRegion.isEmpty() ||
(rRegion.getLength() == 2 && isUpperAscii( rRegion[0]) && isUpperAscii( rRegion[1])))
return true;
SAL_WARN_IF( rRegion.getLength() == 2 && (isLowerAscii( rRegion[0]) || isLowerAscii( rRegion[1])),
"i18npool.langtag", "LanguageTag::isIsoCountry: rejecting lower case");
return false;
}
// static
bool LanguageTag::isIsoScript( const rtl::OUString& rScript )
{
/* TODO: ignore case? For now let's see where rubbish is used. */
if (rScript.isEmpty() ||
(rScript.getLength() == 4 &&
isUpperAscii( rScript[0]) && isLowerAscii( rScript[1]) &&
isLowerAscii( rScript[2]) && isLowerAscii( rScript[3])))
return true;
SAL_WARN_IF( rScript.getLength() == 4 &&
(isLowerAscii( rScript[0]) || isUpperAscii( rScript[1]) ||
isUpperAscii( rScript[2]) || isUpperAscii( rScript[3])),
"i18npool.langtag", "LanguageTag::isIsoScript: rejecting case mismatch");
return false;
}
rtl::OUString LanguageTag::getLanguage() const
{
if (!mbCachedLanguage)
{
maCachedLanguage = getLanguageFromLangtag();
mbCachedLanguage = true;
}
return maCachedLanguage;
}
rtl::OUString LanguageTag::getScript() const
{
if (!mbCachedScript)
{
maCachedScript = getScriptFromLangtag();
mbCachedScript = true;
}
return maCachedScript;
}
rtl::OUString LanguageTag::getLanguageAndScript() const
{
OUString aLanguageScript( getLanguage());
OUString aScript( getScript());
if (!aScript.isEmpty())
{
OUStringBuffer aBuf( aLanguageScript.getLength() + 1 + aScript.getLength());
aBuf.append( aLanguageScript).append( '-').append( aScript);
aLanguageScript = aBuf.makeStringAndClear();
}
return aLanguageScript;
}
rtl::OUString LanguageTag::getCountry() const
{
if (!mbCachedCountry)
{
maCachedCountry = getRegionFromLangtag();
if (!isIsoCountry( maCachedCountry))
maCachedCountry = OUString();
mbCachedCountry = true;
}
return maCachedCountry;
}
rtl::OUString LanguageTag::getRegion() const
{
return getRegionFromLangtag();
}
bool LanguageTag::isIsoLocale() const
{
if (meIsIsoLocale == DECISION_DONTKNOW)
{
if (!mpImplLangtag)
canonicalize();
// It must be at most ll-CC or lll-CC
// Do not use getCountry() here, use getRegion() instead.
meIsIsoLocale = ((maBcp47.isEmpty() ||
(maBcp47.getLength() <= 6 && isIsoLanguage( getLanguage()) && isIsoCountry( getRegion()))) ?
DECISION_YES : DECISION_NO);
}
return meIsIsoLocale == DECISION_YES;
}
bool LanguageTag::isIsoODF() const
{
if (meIsIsoODF == DECISION_DONTKNOW)
{
if (!mpImplLangtag)
canonicalize();
if (!isIsoScript( getScript()))
return ((meIsIsoODF = DECISION_NO) == DECISION_YES);
// The usual case is lll-CC so simply check that first.
if (isIsoLocale())
return ((meIsIsoODF = DECISION_YES) == DECISION_YES);
// If this is not ISO locale for which script must not exist it can
// still be ISO locale plus ISO script lll-Ssss-CC
meIsIsoODF = ((maBcp47.getLength() <= 11 &&
isIsoLanguage( getLanguage()) && isIsoCountry( getRegion()) && isIsoScript( getScript())) ?
DECISION_YES : DECISION_NO);
}
return meIsIsoODF == DECISION_YES;
}
bool LanguageTag::isValidBcp47() const
{
if (meIsValid == DECISION_DONTKNOW)
{
if (!mpImplLangtag)
canonicalize();
SAL_WARN_IF( meIsValid == DECISION_DONTKNOW, "i18npool.langtag",
"LanguageTag::isValidBcp47: canonicalize() doesn't set meIsValid");
}
return meIsValid == DECISION_YES;
}
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