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/container/XContentEnumerationAccess.hpp>
  22 #include <com/sun/star/frame/XModel.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 <comphelper/processfactory.hxx>
  27 #include <sfx2/objsh.hxx>
  28 #include <document.hxx>
  29
  30 using namespace ::com::sun::star::beans;
  31 using namespace ::com::sun::star::container;
  32 using namespace ::com::sun::star::lang;
  33 using namespace ::com::sun::star::sheet;
  34 using namespace ::com::sun::star::uno;
  35
  36 namespace {
  37
  38 class ScParserFactoryMap
  39 {
  40 public:
  41     explicit            ScParserFactoryMap();
  42
  43     Reference< XFormulaParser > createFormulaParser(
  44                             const Reference< XComponent >& rxComponent,
  45                             const OUString& rNamespace );
  46
  47 private:
  48     typedef std::unordered_map<
  49         OUString, Reference< XSingleComponentFactory > > FactoryMap;
  50
  51     Reference< XComponentContext > mxContext;   /// Global component context.
  52     FactoryMap          maFactories;            /// All parser factories, mapped by formula namespace.
  53 };
  54
  55 ScParserFactoryMap::ScParserFactoryMap() :
  56     mxContext( ::comphelper::getProcessComponentContext() )
  57 {
  58     if( !mxContext.is() )
  59         return;
  60
  61     try
  62     {
  63         // enumerate all implementations of the FormulaParser service
  64         Reference< XContentEnumerationAccess > xFactoryEA( mxContext->getServiceManager(), UNO_QUERY_THROW );
  65         Reference< XEnumeration > xEnum( xFactoryEA->createContentEnumeration( "com.sun.star.sheet.FilterFormulaParser" ), UNO_SET_THROW );
  66         while( xEnum->hasMoreElements() ) try // single try/catch for every element
  67         {
  68             // create an instance of the formula parser implementation
  69             Reference< XSingleComponentFactory > xCompFactory( xEnum->nextElement(), UNO_QUERY_THROW );
  70             Reference< XFilterFormulaParser > xParser( xCompFactory->createInstanceWithContext( mxContext ), UNO_QUERY_THROW );
  71
  72             // store factory in the map
  73             OUString aNamespace = xParser->getSupportedNamespace();
  74             if( !aNamespace.isEmpty() )
  75                 maFactories[ aNamespace ] = xCompFactory;
  76         }
  77         catch( Exception& )
  78         {
  79         }
  80     }
  81     catch( Exception& )
  82     {
  83     }
  84 }
  85
  86 Reference< XFormulaParser > ScParserFactoryMap::createFormulaParser(
  87         const Reference< XComponent >& rxComponent, const OUString& rNamespace )
  88 {
  89     Reference< XFormulaParser > xParser;
  90     FactoryMap::const_iterator aIt = maFactories.find( rNamespace );
  91     if( aIt != maFactories.end() ) try
  92     {
  93         Sequence< Any > aArgs( 1 );
  94         aArgs[ 0 ] <<= rxComponent;
  95         xParser.set( aIt->second->createInstanceWithArgumentsAndContext( aArgs, mxContext ), UNO_QUERY_THROW );
  96     }
  97     catch( Exception& )
  98     {
  99     }
 100     return xParser;
 101 }
 102
 103 } // namespace
 104
 105 ScFormulaParserPool::ScFormulaParserPool( const ScDocument& rDoc ) :
 106     mrDoc( rDoc )
 107 {
 108 }
 109
 110 ScFormulaParserPool::~ScFormulaParserPool()
 111 {
 112 }
 113
 114 bool ScFormulaParserPool::hasFormulaParser( const OUString& rNamespace )
 115 {
 116     return getFormulaParser( rNamespace ).is();
 117 }
 118
 119 Reference< XFormulaParser > ScFormulaParserPool::getFormulaParser( const OUString& rNamespace )
 120 {
 121     // try to find an existing parser entry
 122     ParserMap::iterator aIt = maParsers.find( rNamespace );
 123     if( aIt != maParsers.end() )
 124         return aIt->second;
 125
 126     // always create a new entry in the map (even if the following initialization fails)
 127     Reference< XFormulaParser >& rxParser = maParsers[ rNamespace ];
 128
 129     // try to create a new parser object
 130     if( SfxObjectShell* pDocShell = mrDoc.GetDocumentShell() ) try
 131     {
 132         static ScParserFactoryMap theScParserFactoryMap;
 133
 134         Reference< XComponent > xComponent( pDocShell->GetModel(), UNO_QUERY_THROW );
 135         rxParser = theScParserFactoryMap.createFormulaParser( xComponent, rNamespace );
 136     }
 137     catch( Exception& )
 138     {
 139     }
 140     return rxParser;
 141 }
 142
 143 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */