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| -rw-r--r-- | include/sax/fastattribs.hxx | 237 |
1 files changed, 237 insertions, 0 deletions
diff --git a/include/sax/fastattribs.hxx b/include/sax/fastattribs.hxx new file mode 100644 index 000000000..57619b922 --- /dev/null +++ b/include/sax/fastattribs.hxx @@ -0,0 +1,237 @@ +/* -*- 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 . + */ + +#ifndef INCLUDED_SAX_FASTATTRIBS_HXX +#define INCLUDED_SAX_FASTATTRIBS_HXX + +#include <com/sun/star/xml/sax/XFastAttributeList.hpp> +#include <com/sun/star/xml/sax/XFastTokenHandler.hpp> +#include <com/sun/star/util/XCloneable.hpp> + +#include <cppuhelper/implbase.hxx> +#include <sax/saxdllapi.h> + +#include <string_view> +#include <vector> + +namespace com::sun::star::xml::sax { class XFastTokenHandler; } +namespace com::sun::star::xml { struct Attribute; } +namespace com::sun::star::xml { struct FastAttribute; } + +namespace sax_fastparser +{ + +struct UnknownAttribute +{ + OUString maNamespaceURL; + OString maName; + OString maValue; + + UnknownAttribute( OUString sNamespaceURL, OString aName, OString value ); + UnknownAttribute( OString sName, OString value ); + + void FillAttribute( css::xml::Attribute* pAttrib ) const; +}; + +/// A native C++ interface to tokenisation +class SAX_DLLPUBLIC FastTokenHandlerBase : + public cppu::WeakImplHelper< css::xml::sax::XFastTokenHandler > +{ + public: + virtual ~FastTokenHandlerBase(); + virtual sal_Int32 getTokenDirect( const char *pToken, sal_Int32 nLength ) const = 0; + + /** + * Client method to attempt the use of this interface if possible. + * @xTokenHandler - the token lookup interface + * @pStr - string buffer to lookup + * @nLength - optional length of chars in that buffer + * + * @return Tokenized form of pStr + */ + static sal_Int32 getTokenFromChars( + const FastTokenHandlerBase *pTokenHandler, + const char *pStr, size_t nLength ); +}; + + +class SAX_DLLPUBLIC FastAttributeList final : public cppu::WeakImplHelper< css::xml::sax::XFastAttributeList, css::util::XCloneable > +{ +public: + FastAttributeList( FastTokenHandlerBase *pTokenHandler ); + FastAttributeList( const css::uno::Reference< css::xml::sax::XFastAttributeList > & xAttrList ); + virtual ~FastAttributeList() override; + + void clear(); + void reserve( sal_Int32 nNumTokens ) + { + maAttributeValues.reserve(nNumTokens+1); + maAttributeTokens.reserve(nNumTokens); + } + void add( const FastAttributeList& ); + void add( const css::uno::Reference<css::xml::sax::XFastAttributeList>& ); + void add( sal_Int32 nToken, const char* pValue ); + void add( sal_Int32 nToken, const char* pValue, size_t nValueLength ); + void add( sal_Int32 nToken, const OString& rValue ); + void add( sal_Int32 nToken, std::u16string_view sValue ); // Converts to UTF-8 + void addNS( sal_Int32 nNamespaceToken, sal_Int32 nToken, const OString& rValue ); + void addNS( sal_Int32 nNamespaceToken, sal_Int32 nToken, std::u16string_view sValue ); + // note: rQName is *namespace-prefixed* + void addUnknown( const OUString& rNamespaceURL, const OString& rQName, const OString& value ); + void addUnknown( const OString& rName, const OString& value ); + const std::vector< sal_Int32 >& getFastAttributeTokens() const { return maAttributeTokens; } + const char* getFastAttributeValue(size_t nIndex) const { return mpChunk + maAttributeValues[nIndex]; } + sal_Int32 AttributeValueLength(size_t i) const { return maAttributeValues[i + 1] - maAttributeValues[i] - 1; } + size_t size() const { return maAttributeValues.size(); } + + // performance sensitive shortcuts to avoid allocation ... + bool getAsInteger( sal_Int32 nToken, sal_Int32 &rInt) const; + bool getAsDouble( sal_Int32 nToken, double &rDouble) const; + bool getAsChar( sal_Int32 nToken, const char*& rPos ) const; + sal_Int32 getAsIntegerByIndex( sal_Int32 nTokenIndex ) const; + const char* getAsCharByIndex( sal_Int32 nTokenIndex ) const; + OUString getValueByIndex( sal_Int32 nTokenIndex ) const; + + // XFastAttributeList + virtual sal_Bool SAL_CALL hasAttribute( ::sal_Int32 Token ) override; + virtual ::sal_Int32 SAL_CALL getValueToken( ::sal_Int32 Token ) override; + virtual ::sal_Int32 SAL_CALL getOptionalValueToken( ::sal_Int32 Token, ::sal_Int32 Default ) override; + virtual OUString SAL_CALL getValue( ::sal_Int32 Token ) override; + virtual OUString SAL_CALL getOptionalValue( ::sal_Int32 Token ) override; + virtual css::uno::Sequence< css::xml::Attribute > SAL_CALL getUnknownAttributes( ) override; + virtual css::uno::Sequence< css::xml::FastAttribute > SAL_CALL getFastAttributes() override; + + // XCloneable + virtual ::css::uno::Reference< ::css::util::XCloneable > SAL_CALL createClone() override; + + sal_Int32 getAttributeIndex( ::sal_Int32 Token ) + { + for (size_t i=0; i<maAttributeTokens.size(); ++i) + if (maAttributeTokens[i] == Token) + return i; + return -1; + } + + /// Use for fast iteration and conversion of attributes + class FastAttributeIter { + const FastAttributeList &mrList; + size_t mnIdx; + + public: + FastAttributeIter(const FastAttributeList &rList, size_t nIdx) + : mrList(rList), mnIdx(nIdx) + { + } + + FastAttributeIter& operator++ () + { + mnIdx++; + return *this; + } + bool operator!=( const FastAttributeIter& rhs ) const + { + return mnIdx != rhs.mnIdx; + } + + const FastAttributeIter& operator*() const + { + return *this; + } + + sal_Int32 getToken() const + { + assert(mnIdx < mrList.maAttributeTokens.size()); + return mrList.maAttributeTokens[mnIdx]; + } + bool isEmpty() const + { + assert(mnIdx < mrList.maAttributeTokens.size()); + return mrList.AttributeValueLength(mnIdx) < 1; + } + sal_Int32 toInt32() const + { + assert(mnIdx < mrList.maAttributeTokens.size()); + return rtl_str_toInt32(mrList.getFastAttributeValue(mnIdx), 10); + } + double toDouble() const + { + assert(mnIdx < mrList.maAttributeTokens.size()); + return rtl_str_toDouble(mrList.getFastAttributeValue(mnIdx)); + } + bool toBoolean() const + { + assert(mnIdx < mrList.maAttributeTokens.size()); + return rtl_str_toBoolean(mrList.getFastAttributeValue(mnIdx)); + } + OUString toString() const + { + assert(mnIdx < mrList.maAttributeTokens.size()); + return OUString(mrList.getFastAttributeValue(mnIdx), + mrList.AttributeValueLength(mnIdx), + RTL_TEXTENCODING_UTF8); + } + const char* toCString() const + { + assert(mnIdx < mrList.maAttributeTokens.size()); + return mrList.getFastAttributeValue(mnIdx); + } + sal_Int32 getLength() const + { + assert(mnIdx < mrList.maAttributeTokens.size()); + return mrList.AttributeValueLength(mnIdx); + } + std::string_view toView() const + { + assert(mnIdx < mrList.maAttributeTokens.size()); + return std::string_view(mrList.getFastAttributeValue(mnIdx), mrList.AttributeValueLength(mnIdx)); + } + bool isString(const char *str) const + { + assert(mnIdx < mrList.maAttributeTokens.size()); + return !strcmp(str, mrList.getFastAttributeValue(mnIdx)); + } + }; + FastAttributeIter begin() const { return FastAttributeIter(*this, 0); } + FastAttributeIter end() const { return FastAttributeIter(*this, maAttributeTokens.size()); } + FastAttributeIter find( sal_Int32 nToken ) const; + +private: + char *mpChunk; ///< buffer to store all attribute values - null terminated strings + sal_Int32 mnChunkLength; ///< size of allocated memory for mpChunk + // maAttributeValues stores pointers, relative to mpChunk, for each attribute value string + // length of the string is maAttributeValues[n+1] - maAttributeValues[n] - 1 + // maAttributeValues[0] == 0 + std::vector< sal_Int32 > maAttributeValues; + std::vector< sal_Int32 > maAttributeTokens; + std::vector< UnknownAttribute > maUnknownAttributes; + FastTokenHandlerBase * mpTokenHandler; +}; + +inline FastAttributeList& castToFastAttributeList( + const css::uno::Reference< css::xml::sax::XFastAttributeList >& xAttrList ) +{ + assert( dynamic_cast <FastAttributeList *> ( xAttrList.get() ) != nullptr ); + return *static_cast <FastAttributeList *> ( xAttrList.get() ); +} + +} + +#endif + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |