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Diffstat (limited to '')
| -rw-r--r-- | unotools/source/config/configpaths.cxx | 285 |
1 files changed, 285 insertions, 0 deletions
diff --git a/unotools/source/config/configpaths.cxx b/unotools/source/config/configpaths.cxx new file mode 100644 index 000000000..8efdf19b5 --- /dev/null +++ b/unotools/source/config/configpaths.cxx @@ -0,0 +1,285 @@ +/* -*- 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 <unotools/configpaths.hxx> +#include <rtl/ustring.hxx> +#include <rtl/ustrbuf.hxx> +#include <osl/diagnose.h> +#include <o3tl/string_view.hxx> + +namespace utl +{ + +static +void lcl_resolveCharEntities(OUString & aLocalString) +{ + sal_Int32 nEscapePos=aLocalString.indexOf('&'); + if (nEscapePos < 0) return; + + OUStringBuffer aResult; + sal_Int32 nStart = 0; + + do + { + sal_Unicode ch = 0; + if (aLocalString.match("&",nEscapePos)) + ch = '&'; + + else if (aLocalString.match("'",nEscapePos)) + ch = '\''; + + else if (aLocalString.match(""",nEscapePos)) + ch = '"'; + + OSL_ENSURE(ch,"Configuration path contains '&' that is not part of a valid character escape"); + if (ch) + { + aResult.append(aLocalString.subView(nStart,nEscapePos-nStart) + OUStringChar(ch)); + + sal_Int32 nEscapeEnd=aLocalString.indexOf(';',nEscapePos); + nStart = nEscapeEnd+1; + nEscapePos=aLocalString.indexOf('&',nStart); + } + else + { + nEscapePos=aLocalString.indexOf('&',nEscapePos+1); + } + } + while ( nEscapePos > 0); + + aResult.append(aLocalString.subView(nStart)); + + aLocalString = aResult.makeStringAndClear(); +} + +bool splitLastFromConfigurationPath(OUString const& _sInPath, + OUString& _rsOutPath, + OUString& _rsLocalName) +{ + sal_Int32 nStart,nEnd; + + sal_Int32 nPos = _sInPath.getLength()-1; + + // strip trailing slash + if (nPos > 0 && _sInPath[ nPos ] == '/') + { + OSL_FAIL("Invalid config path: trailing '/' is not allowed"); + --nPos; + } + + // check for predicate ['xxx'] or ["yyy"] + if (nPos > 0 && _sInPath[ nPos ] == ']') + { + sal_Unicode chQuote = _sInPath[--nPos]; + + if (chQuote == '\'' || chQuote == '\"') + { + nEnd = nPos; + nPos = _sInPath.lastIndexOf(chQuote,nEnd); + nStart = nPos + 1; + --nPos; // nPos = rInPath.lastIndexOf('[',nPos); + } + else // allow [xxx] + { + nEnd = nPos + 1; + nPos = _sInPath.lastIndexOf('[',nEnd); + nStart = nPos + 1; + } + + OSL_ENSURE(nPos >= 0 && _sInPath[nPos] == '[', "Invalid config path: unmatched quotes or brackets"); + if (nPos >= 0 && _sInPath[nPos] == '[') + { + nPos = _sInPath.lastIndexOf('/',nPos); + } + else // defined behavior for invalid paths + { + nStart = 0; + nEnd = _sInPath.getLength(); + nPos = -1; + } + + } + else + { + nEnd = nPos+1; + nPos = _sInPath.lastIndexOf('/',nEnd); + nStart = nPos + 1; + } + OSL_ASSERT( -1 <= nPos && + nPos < nStart && + nStart < nEnd && + nEnd <= _sInPath.getLength() ); + + OSL_ASSERT(nPos == -1 || _sInPath[nPos] == '/'); + OSL_ENSURE(nPos != 0 , "Invalid config child path: immediate child of root"); + + _rsLocalName = _sInPath.copy(nStart, nEnd-nStart); + _rsOutPath = (nPos > 0) ? _sInPath.copy(0,nPos) : OUString(); + lcl_resolveCharEntities(_rsLocalName); + + return nPos >= 0; +} + +OUString extractFirstFromConfigurationPath(OUString const& _sInPath, OUString* _sOutPath) +{ + sal_Int32 nSep = _sInPath.indexOf('/'); + sal_Int32 nBracket = _sInPath.indexOf('['); + + sal_Int32 nStart = nBracket + 1; + sal_Int32 nEnd = nSep; + + if (0 <= nBracket) // found a bracket-quoted relative path + { + if (nSep < 0 || nBracket < nSep) // and the separator comes after it + { + sal_Unicode chQuote = _sInPath[nStart]; + if (chQuote == '\'' || chQuote == '\"') + { + ++nStart; + nEnd = _sInPath.indexOf(chQuote, nStart+1); + nBracket = nEnd+1; + } + else + { + nEnd = _sInPath.indexOf(']',nStart); + nBracket = nEnd; + } + OSL_ENSURE(nEnd > nStart && _sInPath[nBracket] == ']', "Invalid config path: improper mismatch of quote or bracket"); + OSL_ENSURE((nBracket+1 == _sInPath.getLength() && nSep == -1) || (_sInPath[nBracket+1] == '/' && nSep == nBracket+1), "Invalid config path: brackets not followed by slash"); + } + else // ... but our initial element name is in simple form + nStart = 0; + } + + OUString sResult = (nEnd >= 0) ? _sInPath.copy(nStart, nEnd-nStart) : _sInPath; + lcl_resolveCharEntities(sResult); + + if (_sOutPath != nullptr) + { + *_sOutPath = (nSep >= 0) ? _sInPath.copy(nSep + 1) : OUString(); + } + + return sResult; +} + +// find the position after the prefix in the nested path +static sal_Int32 lcl_findPrefixEnd(std::u16string_view _sNestedPath, std::u16string_view _sPrefixPath) +{ + // TODO: currently handles only exact prefix matches + size_t nPrefixLength = _sPrefixPath.size(); + + OSL_ENSURE(nPrefixLength == 0 || _sPrefixPath[nPrefixLength-1] != '/', + "Cannot handle slash-terminated prefix paths"); + + bool bIsPrefix; + if (_sNestedPath.size() > nPrefixLength) + { + bIsPrefix = _sNestedPath[nPrefixLength] == '/' && + o3tl::starts_with(_sNestedPath, _sPrefixPath); + ++nPrefixLength; + } + else if (_sNestedPath.size() == nPrefixLength) + { + bIsPrefix = _sNestedPath == _sPrefixPath; + } + else + { + bIsPrefix = false; + } + + return bIsPrefix ? nPrefixLength : 0; +} + +bool isPrefixOfConfigurationPath(std::u16string_view _sNestedPath, + std::u16string_view _sPrefixPath) +{ + return _sPrefixPath.empty() || lcl_findPrefixEnd(_sNestedPath,_sPrefixPath) != 0; +} + +OUString dropPrefixFromConfigurationPath(OUString const& _sNestedPath, + std::u16string_view _sPrefixPath) +{ + if ( sal_Int32 nPrefixEnd = lcl_findPrefixEnd(_sNestedPath,_sPrefixPath) ) + { + return _sNestedPath.copy(nPrefixEnd); + } + else + { + OSL_ENSURE(_sPrefixPath.empty(), "Path does not start with expected prefix"); + + return _sNestedPath; + } +} + +static +OUString lcl_wrapName(std::u16string_view _sContent, const OUString& _sType) +{ + const sal_Unicode * const pBeginContent = _sContent.data(); + const sal_Unicode * const pEndContent = pBeginContent + _sContent.size(); + + OSL_PRECOND(!_sType.isEmpty(), "Unexpected config type name: empty"); + OSL_PRECOND(pBeginContent <= pEndContent, "Invalid config name: empty"); + + if (pBeginContent == pEndContent) + return _sType; + + OUStringBuffer aNormalized(_sType.getLength() + _sContent.size() + 4); // reserve approximate size initially + + // prefix: type, opening bracket and quote + aNormalized.append( _sType + "['" ); + + // content: copy over each char and handle escaping + for(const sal_Unicode* pCur = pBeginContent; pCur != pEndContent; ++pCur) + { + // append (escape if needed) + switch(*pCur) + { + case u'&' : aNormalized.append( "&" ); break; + case u'\'': aNormalized.append( "'" ); break; + case u'\"': aNormalized.append( """ ); break; + + default: aNormalized.append( *pCur ); + } + } + + // suffix: closing quote and bracket + aNormalized.append( "']" ); + + return aNormalized.makeStringAndClear(); +} + +OUString wrapConfigurationElementName(std::u16string_view _sElementName) +{ + return lcl_wrapName(_sElementName, "*" ); +} + +OUString wrapConfigurationElementName(std::u16string_view _sElementName, + OUString const& _sTypeName) +{ + // todo: check that _sTypeName is valid + return lcl_wrapName(_sElementName, _sTypeName); +} + +} // namespace utl + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |