sc/source/core/tool/formulaparserpool.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include "formulaparserpool.hxx"
  21 #include <com/sun/star/beans/XPropertySet.hpp>
  22 #include <com/sun/star/container/XContentEnumerationAccess.hpp>
  23 #include <com/sun/star/lang/XComponent.hpp>
  24 #include <com/sun/star/lang/XSingleComponentFactory.hpp>
  25 #include <com/sun/star/sheet/XFilterFormulaParser.hpp>
  26 #include <rtl/instance.hxx>
  27 #include <comphelper/processfactory.hxx>
  28 #include <sfx2/objsh.hxx>
  29 #include "document.hxx"
  30
  31 using namespace ::com::sun::star::beans;
  32 using namespace ::com::sun::star::container;
  33 using namespace ::com::sun::star::lang;
  34 using namespace ::com::sun::star::sheet;
  35 using namespace ::com::sun::star::uno;
  36
  37 namespace {
  38
  39 class ScParserFactoryMap
  40 {
  41 public:
  42     explicit            ScParserFactoryMap();
  43
  44     Reference< XFormulaParser > createFormulaParser(
  45                             const Reference< XComponent >& rxComponent,
  46                             const OUString& rNamespace );
  47
  48 private:
  49     typedef std::unordered_map<
  50         OUString, Reference< XSingleComponentFactory >,
  51         OUStringHash, std::equal_to< OUString > > FactoryMap;
  52
  53     Reference< XComponentContext > mxContext;   /// Global component context.
  54     FactoryMap          maFactories;            /// All parser factories, mapped by formula namespace.
  55 };
  56
  57 ScParserFactoryMap::ScParserFactoryMap() :
  58     mxContext( ::comphelper::getProcessComponentContext() )
  59 {
  60     if( mxContext.is() ) try
  61     {
  62         // enumerate all implementations of the FormulaParser service
  63         Reference< XContentEnumerationAccess > xFactoryEA( mxContext->getServiceManager(), UNO_QUERY_THROW );
  64         Reference< XEnumeration > xEnum( xFactoryEA->createContentEnumeration( OUString( "com.sun.star.sheet.FilterFormulaParser" ) ), UNO_SET_THROW );
  65         while( xEnum->hasMoreElements() ) try // single try/catch for every element
  66         {
  67             // create an instance of the formula parser implementation
  68             Reference< XSingleComponentFactory > xCompFactory( xEnum->nextElement(), UNO_QUERY_THROW );
  69             Reference< XFilterFormulaParser > xParser( xCompFactory->createInstanceWithContext( mxContext ), UNO_QUERY_THROW );
  70
  71             // store factory in the map
  72             OUString aNamespace = xParser->getSupportedNamespace();
  73             if( !aNamespace.isEmpty() )
  74                 maFactories[ aNamespace ] = xCompFactory;
  75         }
  76         catch( Exception& )
  77         {
  78         }
  79     }
  80     catch( Exception& )
  81     {
  82     }
  83 }
  84
  85 Reference< XFormulaParser > ScParserFactoryMap::createFormulaParser(
  86         const Reference< XComponent >& rxComponent, const OUString& rNamespace )
  87 {
  88     Reference< XFormulaParser > xParser;
  89     FactoryMap::const_iterator aIt = maFactories.find( rNamespace );
  90     if( aIt != maFactories.end() ) try
  91     {
  92         Sequence< Any > aArgs( 1 );
  93         aArgs[ 0 ] <<= rxComponent;
  94         xParser.set( aIt->second->createInstanceWithArgumentsAndContext( aArgs, mxContext ), UNO_QUERY_THROW );
  95     }
  96     catch( Exception& )
  97     {
  98     }
  99     return xParser;
 100 }
 101
 102 struct ScParserFactorySingleton : public ::rtl::Static< ScParserFactoryMap, ScParserFactorySingleton > {};
 103
 104 } // namespace
 105
 106 ScFormulaParserPool::ScFormulaParserPool( const ScDocument& rDoc ) :
 107     mrDoc( rDoc )
 108 {
 109 }
 110
 111 ScFormulaParserPool::~ScFormulaParserPool()
 112 {
 113 }
 114
 115 bool ScFormulaParserPool::hasFormulaParser( const OUString& rNamespace )
 116 {
 117     return getFormulaParser( rNamespace ).is();
 118 }
 119
 120 Reference< XFormulaParser > ScFormulaParserPool::getFormulaParser( const OUString& rNamespace )
 121 {
 122     // try to find an existing parser entry
 123     ParserMap::iterator aIt = maParsers.find( rNamespace );
 124     if( aIt != maParsers.end() )
 125         return aIt->second;
 126
 127     // always create a new entry in the map (even if the following initialization fails)
 128     Reference< XFormulaParser >& rxParser = maParsers[ rNamespace ];
 129
 130     // try to create a new parser object
 131     if( SfxObjectShell* pDocShell = mrDoc.GetDocumentShell() ) try
 132     {
 133         Reference< XComponent > xComponent( pDocShell->GetModel(), UNO_QUERY_THROW );
 134         ScParserFactoryMap& rFactoryMap = ScParserFactorySingleton::get();
 135         rxParser = rFactoryMap.createFormulaParser( xComponent, rNamespace );
 136     }
 137     catch( Exception& )
 138     {
 139     }
 140     return rxParser;
 141 }
 142
 143 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */