/* -*- 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 <sfx2/docfile.hxx>
#include <sfx2/objsh.hxx>
#include <sfx2/app.hxx>
#include <sfx2/frame.hxx>
#include <sfx2/request.hxx>
#include <sot/storage.hxx>
#include <sot/exchange.hxx>
#include <filter/msfilter/classids.hxx>
#include <tools/globname.hxx>
#include <com/sun/star/beans/NamedValue.hpp>
#include <com/sun/star/document/XFilter.hpp>
#include <com/sun/star/document/XImporter.hpp>
#include <com/sun/star/ucb/ContentCreationException.hpp>
#include <scitems.hxx>
#include <svl/stritem.hxx>
#include <unotools/streamwrap.hxx>
#include <filter.hxx>
#include <document.hxx>
#include <optuno.hxx>
#include <xistream.hxx>
 
#include <docsh.hxx>
#include <scerrors.hxx>
#include <root.hxx>
#include <imp_op.hxx>
#include <excimp8.hxx>
#include <exp_op.hxx>
#include <scdll.hxx>
 
#include <memory>
 
ErrCode ScFormatFilterPluginImpl::ScImportExcel( SfxMedium& rMedium, ScDocument* pDocument, const EXCIMPFORMAT eFormat )
{
    // check the passed Calc document
    OSL_ENSURE( pDocument, "::ScImportExcel - no document" );
    if( !pDocument ) return SCERR_IMPORT_INTERNAL;        // should not happen
 
    /*  Import all BIFF versions regardless on eFormat, needed for import of
        external cells (file type detection returns Excel4.0). */
    if( (eFormat != EIF_AUTO) && (eFormat != EIF_BIFF_LE4) && (eFormat != EIF_BIFF5) && (eFormat != EIF_BIFF8) )
    {
        OSL_FAIL( "::ScImportExcel - wrong file format specification" );
        return SCERR_IMPORT_FORMAT;
    }
 
    // check the input stream from medium
    SvStream* pMedStrm = rMedium.GetInStream();
    OSL_ENSURE( pMedStrm, "::ScImportExcel - medium without input stream" );
    if( !pMedStrm ) return SCERR_IMPORT_OPEN;           // should not happen
 
    SvStream* pBookStrm = nullptr;            // The "Book"/"Workbook" stream containing main data.
    XclBiff eBiff = EXC_BIFF_UNKNOWN;   // The BIFF version of the main stream.
 
    // try to open an OLE storage
    tools::SvRef<SotStorage> xRootStrg;
    tools::SvRef<SotStorageStream> xStrgStrm;
    if( SotStorage::IsStorageFile( pMedStrm ) )
    {
        xRootStrg = new SotStorage( pMedStrm, false );
        if( xRootStrg->GetError() )
            xRootStrg = nullptr;
    }
 
    // try to open "Book" or "Workbook" stream in OLE storage
    if( xRootStrg.is() )
    {
        // try to open the "Book" stream
        tools::SvRef<SotStorageStream> xBookStrm = ScfTools::OpenStorageStreamRead( xRootStrg, EXC_STREAM_BOOK );
        XclBiff eBookBiff = xBookStrm.is() ?  XclImpStream::DetectBiffVersion( *xBookStrm ) : EXC_BIFF_UNKNOWN;
 
        // try to open the "Workbook" stream
        tools::SvRef<SotStorageStream> xWorkbookStrm = ScfTools::OpenStorageStreamRead( xRootStrg, EXC_STREAM_WORKBOOK );
        XclBiff eWorkbookBiff = xWorkbookStrm.is() ?  XclImpStream::DetectBiffVersion( *xWorkbookStrm ) : EXC_BIFF_UNKNOWN;
 
        // decide which stream to use
        if( (eWorkbookBiff != EXC_BIFF_UNKNOWN) && ((eBookBiff == EXC_BIFF_UNKNOWN) || (eWorkbookBiff > eBookBiff)) )
        {
            /*  Only "Workbook" stream exists; or both streams exist,
                and "Workbook" has higher BIFF version than "Book" stream. */
            xStrgStrm = xWorkbookStrm;
            eBiff = eWorkbookBiff;
        }
        else if( eBookBiff != EXC_BIFF_UNKNOWN )
        {
            /*  Only "Book" stream exists; or both streams exist,
                and "Book" has higher BIFF version than "Workbook" stream. */
            xStrgStrm = xBookStrm;
            eBiff = eBookBiff;
        }
 
        pBookStrm = xStrgStrm.get();
    }
 
    // no "Book" or "Workbook" stream found, try plain input stream from medium (even for BIFF5+)
    if( !pBookStrm )
    {
        eBiff = XclImpStream::DetectBiffVersion( *pMedStrm );
        if( eBiff != EXC_BIFF_UNKNOWN )
            pBookStrm = pMedStrm;
    }
 
    // try to import the file
    ErrCode eRet = SCERR_IMPORT_UNKNOWN_BIFF;
    if( pBookStrm )
    {
        pBookStrm->SetBufferSize( 0x8000 );     // still needed?
 
        XclImpRootData aImpData( eBiff, rMedium, xRootStrg, *pDocument, RTL_TEXTENCODING_MS_1252 );
        std::unique_ptr< ImportExcel > xFilter;
        switch( eBiff )
        {
            case EXC_BIFF2:
            case EXC_BIFF3:
            case EXC_BIFF4:
            case EXC_BIFF5:
                xFilter.reset( new ImportExcel( aImpData, *pBookStrm ) );
            break;
            case EXC_BIFF8:
                xFilter.reset( new ImportExcel8( aImpData, *pBookStrm ) );
            break;
            default:    DBG_ERROR_BIFF();
        }
 
        eRet = xFilter.get() ? xFilter->Read() : SCERR_IMPORT_INTERNAL;
    }
 
    return eRet;
}
 
static ErrCode lcl_ExportExcelBiff( SfxMedium& rMedium, ScDocument *pDocument,
        SvStream* pMedStrm, bool bBiff8, rtl_TextEncoding eNach )
{
    // try to open an OLE storage
    tools::SvRef<SotStorage> xRootStrg = new SotStorage( pMedStrm, false );
    if( xRootStrg->GetError() ) return SCERR_IMPORT_OPEN;
 
    // create BIFF dependent strings
    OUString aStrmName, aClipName, aClassName;
    if( bBiff8 )
    {
        aStrmName = EXC_STREAM_WORKBOOK;
        aClipName = "Biff8";
        aClassName = "Microsoft Excel 97-Tabelle";
    }
    else
    {
        aStrmName = EXC_STREAM_BOOK;
        aClipName = "Biff5";
        aClassName = "Microsoft Excel 5.0-Tabelle";
    }
 
    // open the "Book"/"Workbook" stream
    tools::SvRef<SotStorageStream> xStrgStrm = ScfTools::OpenStorageStreamWrite( xRootStrg, aStrmName );
    if( !xStrgStrm.is() || xStrgStrm->GetError() ) return SCERR_IMPORT_OPEN;
 
    xStrgStrm->SetBufferSize( 0x8000 );     // still needed?
 
    ErrCode eRet = SCERR_IMPORT_UNKNOWN_BIFF;
    XclExpRootData aExpData( bBiff8 ? EXC_BIFF8 : EXC_BIFF5, rMedium, xRootStrg, *pDocument, eNach );
    if ( bBiff8 )
    {
        ExportBiff8 aFilter( aExpData, *xStrgStrm );
        eRet = aFilter.Write();
    }
    else
    {
        ExportBiff5 aFilter( aExpData, *xStrgStrm );
        eRet = aFilter.Write();
    }
 
    if( eRet == SCWARN_IMPORT_RANGE_OVERFLOW )
        eRet = SCWARN_EXPORT_MAXROW;
 
    SvGlobalName aGlobName(MSO_EXCEL5_CLASSID);
    SotClipboardFormatId nClip = SotExchange::RegisterFormatName( aClipName );
    xRootStrg->SetClass( aGlobName, nClip, aClassName );
 
    xStrgStrm->Commit();
    xRootStrg->Commit();
 
    return eRet;
}
 
ErrCode ScFormatFilterPluginImpl::ScExportExcel5( SfxMedium& rMedium, ScDocument *pDocument,
    ExportFormatExcel eFormat, rtl_TextEncoding eNach )
{
    if( eFormat != ExpBiff5 && eFormat != ExpBiff8 )
        return SCERR_IMPORT_NI;
 
    // check the passed Calc document
    OSL_ENSURE( pDocument, "::ScExportExcel5 - no document" );
    if( !pDocument ) return SCERR_IMPORT_INTERNAL;        // should not happen
 
    // check the output stream from medium
    SvStream* pMedStrm = rMedium.GetOutStream();
    OSL_ENSURE( pMedStrm, "::ScExportExcel5 - medium without output stream" );
    if( !pMedStrm ) return SCERR_IMPORT_OPEN;           // should not happen
 
    ErrCode eRet = SCERR_IMPORT_UNKNOWN_BIFF;
    if( eFormat == ExpBiff5 || eFormat == ExpBiff8 )
        eRet = lcl_ExportExcelBiff( rMedium, pDocument, pMedStrm, eFormat == ExpBiff8, eNach );
 
    return eRet;
}
 
extern "C" SAL_DLLPUBLIC_EXPORT bool TestImportCalcRTF(SvStream &rStream)
{
    ScDLL::Init();
    ScDocument aDocument;
    ScDocOptions aDocOpt = aDocument.GetDocOptions();
    aDocOpt.SetLookUpColRowNames(false);
    aDocument.SetDocOptions(aDocOpt);
    aDocument.MakeTable(0);
    aDocument.EnableExecuteLink(false);
    aDocument.SetInsertingFromOtherDoc(true);
    ScRange aRange;
    return ScFormatFilter::Get().ScImportRTF(rStream, OUString(), &aDocument, aRange) == ERRCODE_NONE;
}
 
extern "C" SAL_DLLPUBLIC_EXPORT bool TestImportXLS(SvStream& rStream)
{
    ScDLL::Init();
    SfxMedium aMedium;
    css::uno::Reference<css::io::XInputStream> xStm(new utl::OInputStreamWrapper(rStream));
    aMedium.GetItemSet()->Put(SfxUnoAnyItem(SID_INPUTSTREAM, css::uno::makeAny(xStm)));
 
    ScDocShellRef xDocShell = new ScDocShell(SfxModelFlags::EMBEDDED_OBJECT |
                                             SfxModelFlags::DISABLE_EMBEDDED_SCRIPTS |
                                             SfxModelFlags::DISABLE_DOCUMENT_RECOVERY);
 
    xDocShell->DoInitNew();
 
    ScDocument& rDoc = xDocShell->GetDocument();
 
    ScDocOptions aDocOpt = rDoc.GetDocOptions();
    aDocOpt.SetLookUpColRowNames(false);
    rDoc.SetDocOptions(aDocOpt);
    rDoc.MakeTable(0);
    rDoc.EnableExecuteLink(false);
    rDoc.SetInsertingFromOtherDoc(true);
    rDoc.InitDrawLayer(xDocShell.get());
    bool bRet(false);
    try
    {
        bRet = ScFormatFilter::Get().ScImportExcel(aMedium, &rDoc, EIF_AUTO) == ERRCODE_NONE;
    }
    catch (const css::ucb::ContentCreationException&)
    {
    }
    catch (const std::out_of_range&)
    {
    }
    xDocShell->DoClose();
    xDocShell.clear();
    return bRet;
}
 
extern "C" SAL_DLLPUBLIC_EXPORT bool TestImportDIF(SvStream &rStream)
{
    ScDLL::Init();
    ScDocument aDocument;
    ScDocOptions aDocOpt = aDocument.GetDocOptions();
    aDocOpt.SetLookUpColRowNames(false);
    aDocument.SetDocOptions(aDocOpt);
    aDocument.MakeTable(0);
    aDocument.EnableExecuteLink(false);
    aDocument.SetInsertingFromOtherDoc(true);
    return ScFormatFilter::Get().ScImportDif(rStream, &aDocument, ScAddress(0, 0, 0), RTL_TEXTENCODING_IBM_850) == ERRCODE_NONE;
}
 
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */