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Diffstat (limited to 'svtools/source/misc/langtab.cxx')
| -rw-r--r-- | svtools/source/misc/langtab.cxx | 307 |
1 files changed, 307 insertions, 0 deletions
diff --git a/svtools/source/misc/langtab.cxx b/svtools/source/misc/langtab.cxx new file mode 100644 index 000000000..00e676d14 --- /dev/null +++ b/svtools/source/misc/langtab.cxx @@ -0,0 +1,307 @@ +/* -*- 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 <sal/config.h> + +#include <string_view> + +#include <com/sun/star/container/XNameAccess.hpp> +#include <com/sun/star/i18n/DirectionProperty.hpp> +#include <com/sun/star/uno/Sequence.hxx> +#include <com/sun/star/uno/Any.h> + +#include <i18nlangtag/lang.h> +#include <i18nlangtag/mslangid.hxx> +#include <i18nlangtag/languagetag.hxx> +#include <i18nlangtag/languagetagicu.hxx> + +#include <sal/log.hxx> +#include <vcl/svapp.hxx> +#include <vcl/settings.hxx> +#include <svtools/svtresid.hxx> +#include <svtools/langtab.hxx> +#include <unotools/syslocale.hxx> +#include <unotools/charclass.hxx> +#include <tools/resary.hxx> +#include <officecfg/VCL.hxx> +#include <langtab.hrc> + +using namespace ::com::sun::star; + +namespace { + +class SvtLanguageTableImpl +{ +private: + std::vector<std::pair<OUString, LanguageType>> m_aStrings; +public: + + SvtLanguageTableImpl(); + + bool HasType( const LanguageType eType ) const; + OUString GetString( const LanguageType eType ) const; + LanguageType GetType( std::u16string_view rStr ) const; + sal_uInt32 GetEntryCount() const; + LanguageType GetTypeAtIndex( sal_uInt32 nIndex ) const; + sal_uInt32 AddItem(const OUString& rLanguage, const LanguageType eType) + { + m_aStrings.emplace_back(rLanguage, eType); + return m_aStrings.size(); + } + LanguageType GetValue(sal_uInt32 nIndex) const + { + return (nIndex < m_aStrings.size()) ? m_aStrings[nIndex].second : LANGUAGE_DONTKNOW; + } + sal_uInt32 FindIndex(LanguageType nValue) const + { + const size_t nItems = m_aStrings.size(); + for (size_t i = 0; i < nItems; ++i) + { + if (m_aStrings[i].second == nValue) + return i; + } + return RESARRAY_INDEX_NOTFOUND; + } +}; + +struct theLanguageTable : public rtl::Static< SvtLanguageTableImpl, theLanguageTable > {}; +} + +OUString ApplyLreOrRleEmbedding( const OUString &rText ) +{ + const sal_Int32 nLen = rText.getLength(); + if (nLen == 0) + return OUString(); + + constexpr sal_Unicode cLRE_Embedding = 0x202A; // the start char of an LRE embedding + constexpr sal_Unicode cRLE_Embedding = 0x202B; // the start char of an RLE embedding + constexpr sal_Unicode cPopDirectionalFormat = 0x202C; // the unicode PDF (POP_DIRECTIONAL_FORMAT) char that terminates an LRE/RLE embedding + + // check if there are already embedding characters at the strings start + // if so change nothing + const sal_Unicode cChar = rText[0]; + if (cChar == cLRE_Embedding || cChar == cRLE_Embedding) + return rText; + + // since we only call the function getCharacterDirection + // it does not matter which locale the CharClass is for. + // Thus we can readily make use of SvtSysLocale::GetCharClass() + // which should come at no cost... + SvtSysLocale aSysLocale; + const CharClass &rCharClass = aSysLocale.GetCharClass(); + + // we should look for the first non-neutral LTR or RTL character + // and use that to determine the embedding of the whole text... + // Thus we can avoid to check every character of the text. + bool bFound = false; + bool bIsRtlText = false; + for (sal_Int32 i = 0; i < nLen && !bFound; ++i) + { + i18n::DirectionProperty nDirection = rCharClass.getCharacterDirection( rText, i ); + switch (nDirection) + { + case i18n::DirectionProperty_LEFT_TO_RIGHT : + case i18n::DirectionProperty_LEFT_TO_RIGHT_EMBEDDING : + case i18n::DirectionProperty_LEFT_TO_RIGHT_OVERRIDE : + case i18n::DirectionProperty_EUROPEAN_NUMBER : + case i18n::DirectionProperty_ARABIC_NUMBER : // yes! arabic numbers are written from left to right + { + bIsRtlText = false; + bFound = true; + break; + } + + case i18n::DirectionProperty_RIGHT_TO_LEFT : + case i18n::DirectionProperty_RIGHT_TO_LEFT_ARABIC : + case i18n::DirectionProperty_RIGHT_TO_LEFT_EMBEDDING : + case i18n::DirectionProperty_RIGHT_TO_LEFT_OVERRIDE : + { + bIsRtlText = true; + bFound = true; + break; + } + + default: + { + // nothing to be done, character is considered to be neutral we need to look further ... + } + } + } + + sal_Unicode cStart = cLRE_Embedding; // default is to use LRE embedding characters + if (bIsRtlText) + cStart = cRLE_Embedding; // then use RLE embedding + + // add embedding start and end chars to the text if the direction could be determined + OUString aRes( rText ); + if (bFound) + { + aRes = OUStringChar(cStart) + aRes + + OUStringChar(cPopDirectionalFormat); + } + + return aRes; +} + +static OUString lcl_getDescription( const LanguageTag& rTag ) +{ + OUString aStr( LanguageTagIcu::getDisplayName( rTag, Application::GetSettings().GetUILanguageTag())); + if (aStr.isEmpty() || aStr == rTag.getBcp47()) + { + // Place in curly brackets, so all on-the-fly tags without display name + // are grouped together at the top of a listbox (but behind the + // "[None]" entry), and not sprinkled all over, which alphabetically + // might make sense in an English UI only anyway. Also a visual + // indicator that it is a programmatical name, IMHO. + return OUString::Concat("{") + aStr + "}"; + } + else + { + // The ICU display name might be identical to a predefined name or even + // to another tag's ICU name; clarify that this is a generated name and + // append the language tag in curly brackets to distinguish. + return aStr + " {" + rTag.getBcp47() + "}"; + } +} + +SvtLanguageTableImpl::SvtLanguageTableImpl() +{ + for (size_t i = 0; i < SAL_N_ELEMENTS(STR_ARR_SVT_LANGUAGE_TABLE); ++i) + { + m_aStrings.emplace_back(SvtResId(STR_ARR_SVT_LANGUAGE_TABLE[i].first), STR_ARR_SVT_LANGUAGE_TABLE[i].second); + } + + auto xNA = officecfg::VCL::ExtraLanguages::get(); + const uno::Sequence <OUString> rElementNames = xNA->getElementNames(); + for (const OUString& rBcp47 : rElementNames) + { + OUString aName; + sal_Int32 nType = 0; + uno::Reference <container::XNameAccess> xNB; + xNA->getByName(rBcp47) >>= xNB; + bool bSuccess = (xNB->getByName("Name") >>= aName) && + (xNB->getByName("ScriptType") >>= nType); + if (bSuccess) + { + LanguageTag aLang(rBcp47); + LanguageType nLangType = aLang.getLanguageType(); + if (nType <= sal_Int32(LanguageTag::ScriptType::RTL) && nType > sal_Int32(LanguageTag::ScriptType::UNKNOWN)) + aLang.setScriptType(LanguageTag::ScriptType(nType)); + sal_uInt32 nPos = FindIndex(nLangType); + if (nPos == RESARRAY_INDEX_NOTFOUND) + AddItem((aName.isEmpty() ? lcl_getDescription(aLang) : aName), nLangType); + } + } +} + +bool SvtLanguageTableImpl::HasType( const LanguageType eType ) const +{ + LanguageType eLang = MsLangId::getReplacementForObsoleteLanguage( eType ); + sal_uInt32 nPos = FindIndex(eLang); + + return RESARRAY_INDEX_NOTFOUND != nPos && nPos < GetEntryCount(); +} + +bool SvtLanguageTable::HasLanguageType( const LanguageType eType ) +{ + return theLanguageTable::get().HasType( eType ); +} + +OUString SvtLanguageTableImpl::GetString( const LanguageType eType ) const +{ + const LanguageType nLang = MsLangId::getReplacementForObsoleteLanguage( eType); + const sal_uInt32 nPos = (eType == LANGUAGE_PROCESS_OR_USER_DEFAULT ? + FindIndex(LANGUAGE_SYSTEM) : FindIndex( nLang)); + + if ( RESARRAY_INDEX_NOTFOUND != nPos && nPos < GetEntryCount() ) + return m_aStrings[nPos].first; + + // Obtain from ICU, or a geeky but usable-in-a-pinch lang-tag. + OUString sLangTag( lcl_getDescription( LanguageTag(nLang))); + SAL_WARN("svtools.misc", "Language: 0x" + << std::hex << nLang + << " with unknown name, so returning lang-tag of: " + << sLangTag); + + // And add it to the table if it is an on-the-fly-id, which it usually is, + // so it is available in all subsequent language boxes. + if (LanguageTag::isOnTheFlyID( nLang)) + const_cast<SvtLanguageTableImpl*>(this)->AddItem( sLangTag, nLang); + + return sLangTag; +} + +OUString SvtLanguageTable::GetLanguageString( const LanguageType eType ) +{ + return theLanguageTable::get().GetString( eType ); +} + +LanguageType SvtLanguageTableImpl::GetType( std::u16string_view rStr ) const +{ + LanguageType eType = LANGUAGE_DONTKNOW; + sal_uInt32 nCount = GetEntryCount(); + + for ( sal_uInt32 i = 0; i < nCount; ++i ) + { + if (m_aStrings[i].first == rStr) + { + eType = GetValue(i); + break; + } + } + return eType; +} + +LanguageType SvtLanguageTable::GetLanguageType( std::u16string_view rStr ) +{ + return theLanguageTable::get().GetType( rStr ); +} + +sal_uInt32 SvtLanguageTableImpl::GetEntryCount() const +{ + return m_aStrings.size(); +} + +sal_uInt32 SvtLanguageTable::GetLanguageEntryCount() +{ + return theLanguageTable::get().GetEntryCount(); +} + + +LanguageType SvtLanguageTableImpl::GetTypeAtIndex( sal_uInt32 nIndex ) const +{ + LanguageType nType = LANGUAGE_DONTKNOW; + if (nIndex < GetEntryCount()) + nType = GetValue(nIndex); + return nType; +} + +LanguageType SvtLanguageTable::GetLanguageTypeAtIndex( sal_uInt32 nIndex ) +{ + return theLanguageTable::get().GetTypeAtIndex( nIndex); +} + + +sal_uInt32 SvtLanguageTable::AddLanguageTag( const LanguageTag& rLanguageTag ) +{ + return theLanguageTable::get().AddItem( lcl_getDescription(rLanguageTag), + rLanguageTag.getLanguageType()); +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |