externalrefmgr.hxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 * 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_SC_INC_EXTERNALREFMGR_HXX
#define INCLUDED_SC_INC_EXTERNALREFMGR_HXX

#include "address.hxx"
#include "document.hxx"
#include <sfx2/objsh.hxx>
#include <sfx2/lnkbase.hxx>
#include <tools/time.hxx>
#include <vcl/timer.hxx>
#include <svl/zforlist.hxx>
#include <svl/lstner.hxx>
#include "types.hxx"
#include "rangelst.hxx"
#include <osl/mutex.hxx>
#include <formula/types.hxx>
#include <tools/solar.h>

#include <memory>
#include <unordered_map>
#include <unordered_set>
#include <vector>
#include <set>
#include <o3tl/sorted_vector.hxx>
#include <formula/ExternalReferenceHelper.hxx>

class ScTokenArray;
namespace weld { class Window; }

class ScFormulaCell;

namespace sc {

class ColumnSpanSet;

}

class ScExternalRefLink final : public ::sfx2::SvBaseLink
{
public:
    ScExternalRefLink(ScDocument& rDoc, sal_uInt16 nFileId);
    virtual ~ScExternalRefLink() override;

    virtual void Closed() override;
    virtual ::sfx2::SvBaseLink::UpdateResult DataChanged(
        const OUString& rMimeType, const css::uno::Any & rValue) override;
    virtual void Edit(weld::Window* pParent, const Link<SvBaseLink&,void>& rEndEditHdl) override;

    void SetDoRefresh(bool b);

private:
    ScExternalRefLink() = delete;
    ScExternalRefLink(const ScExternalRefLink&) = delete;

    sal_uInt16  mnFileId;
    ScDocument& mrDoc;
    bool        mbDoRefresh;
};

class ScExternalRefCache
{
public:
    typedef ::formula::FormulaTokenRef          TokenRef;
    typedef std::shared_ptr<ScTokenArray>   TokenArrayRef;

    struct TableName
    {
        OUString maUpperName;
        OUString maRealName;

        explicit TableName(const OUString& rUpper, const OUString& rReal);
    };

    struct CellFormat
    {
        bool      mbIsSet;
        SvNumFormatType mnType;
        sal_uLong mnIndex;

        explicit CellFormat();
    };

private:
    struct Cell
    {
        TokenRef   mxToken;
        sal_uLong  mnFmtIndex;
    };
    typedef std::unordered_map<SCCOL, Cell>            RowDataType;
    typedef std::unordered_map<SCROW, RowDataType>     RowsDataType;

public:
    class Table
    {
    public:

        Table();
        ~Table();

        void clear();

        SC_DLLPUBLIC void setCell(SCCOL nCol, SCROW nRow, TokenRef const & pToken, sal_uLong nFmtIndex = 0, bool bSetCacheRange = true);
        SC_DLLPUBLIC TokenRef getCell(SCCOL nCol, SCROW nRow, sal_uInt32* pnFmtIndex = nullptr) const;
        bool hasRow( SCROW nRow ) const;
        void setReferenced( bool bReferenced );
        bool isReferenced() const;
        void getAllRows(::std::vector<SCROW>& rRows, SCROW nLow = 0, SCROW nHigh = MAXROW) const;
        SC_DLLPUBLIC ::std::pair< SCROW, SCROW > getRowRange() const;
        void getAllCols(SCROW nRow, ::std::vector<SCCOL>& rCols, SCCOL nLow = 0, SCCOL nHigh = MAXCOL) const;
        SC_DLLPUBLIC ::std::pair< SCCOL, SCCOL > getColRange( SCROW nRow ) const;
        void getAllNumberFormats(::std::vector<sal_uInt32>& rNumFmts) const;
        bool isRangeCached(SCCOL nCol1, SCROW nRow1, SCCOL nCol2, SCROW nRow2) const;

        void setCachedCell(SCCOL nCol, SCROW nRow);
        void setCachedCellRange(SCCOL nCol1, SCROW nRow1, SCCOL nCol2, SCROW nRow2);

        SC_DLLPUBLIC void setWholeTableCached();
    private:
        bool isInCachedRanges(SCCOL nCol, SCROW nRow) const;
        TokenRef getEmptyOrNullToken(SCCOL nCol, SCROW nRow) const;

    private:
        RowsDataType                    maRows;
        ScRangeList                     maCachedRanges;
        bool                            mbReferenced;
    };

    typedef std::shared_ptr<Table> TableTypeRef;
    typedef std::unordered_map< OUString, size_t>
        TableNameIndexMap;

    ScExternalRefCache();
    ~ScExternalRefCache();

    const OUString* getRealTableName(sal_uInt16 nFileId, const OUString& rTabName) const;
    const OUString* getRealRangeName(sal_uInt16 nFileId, const OUString& rRangeName) const;

    ScExternalRefCache::TokenRef getCellData(
        sal_uInt16 nFileId, const OUString& rTabName, SCCOL nCol, SCROW nRow, sal_uInt32* pnFmtIndex);

    ScExternalRefCache::TokenArrayRef getCellRangeData(
        sal_uInt16 nFileId, const OUString& rTabName, const ScRange& rRange);

    ScExternalRefCache::TokenArrayRef getRangeNameTokens(sal_uInt16 nFileId, const OUString& rName);
    void setRangeNameTokens(sal_uInt16 nFileId, const OUString& rName, TokenArrayRef pArray);
    bool isValidRangeName(sal_uInt16 nFileId, const OUString& rName) const;
    void setRangeName(sal_uInt16 nFileId, const OUString& rName);

    void setCellData(sal_uInt16 nFileId, const OUString& rTabName,
                     SCCOL nCol, SCROW nRow, TokenRef const & pToken, sal_uLong nFmtIndex);

    struct SingleRangeData
    {
        OUString maTableName;
        ScMatrixRef mpRangeData;
    };
    void setCellRangeData(sal_uInt16 nFileId, const ScRange& rRange, const ::std::vector<SingleRangeData>& rData,
                          const TokenArrayRef& pArray);

    bool isDocInitialized(sal_uInt16 nFileId);
    void initializeDoc(sal_uInt16 nFileId, const ::std::vector<OUString>& rTabNames, const OUString& rBaseName);
    OUString getTableName(sal_uInt16 nFileId, size_t nCacheId) const;
    void getAllTableNames(sal_uInt16 nFileId, ::std::vector<OUString>& rTabNames) const;
    SCTAB getTabSpan( sal_uInt16 nFileId, const OUString& rStartTabName, const OUString& rEndTabName ) const;
    void getAllNumberFormats(::std::vector<sal_uInt32>& rNumFmts) const;

    bool setCacheDocReferenced( sal_uInt16 nFileId );

    bool setCacheTableReferenced( sal_uInt16 nFileId, const OUString& rTabName, size_t nSheets );
    void setAllCacheTableReferencedStati( bool bReferenced );
    bool areAllCacheTablesReferenced() const { return maReferenced.mbAllReferenced;}

    void getAllCachedDataSpans( const ScDocument& rSrcDoc, sal_uInt16 nFileId, sc::ColumnSpanSet& rSet ) const;

    bool getSrcDocTable( const ScDocument& rSrcDoc, const OUString& rTabName, SCTAB& rTab, sal_uInt16 nFileId ) const;

private:
    struct ReferencedStatus
    {
        struct DocReferenced
        {
            ::std::vector<bool> maTables;
            bool                mbAllTablesReferenced;
            // Initially, documents have no tables but all referenced.
            DocReferenced() : mbAllTablesReferenced(true) {}
        };
        typedef ::std::vector<DocReferenced> DocReferencedVec;

        DocReferencedVec maDocs;
        bool             mbAllReferenced;

                    ReferencedStatus();
        void        reset( size_t nDocs );
        void        checkAllDocs();

    } maReferenced;
    void addCacheTableToReferenced( sal_uInt16 nFileId, size_t nIndex );
    void addCacheDocToReferenced( sal_uInt16 nFileId );
public:

    ScExternalRefCache::TableTypeRef getCacheTable(sal_uInt16 nFileId, size_t nTabIndex) const;
    ScExternalRefCache::TableTypeRef getCacheTable(sal_uInt16 nFileId, const OUString& rTabName, bool bCreateNew,
            size_t* pnIndex, const OUString* pExtUrl);

    void clearCache(sal_uInt16 nFileId);

    void clearCacheTables(sal_uInt16 nFileId);

    // Get the fake doc used to pass to methods that need an ScDocument in order to do row/col validation
    const ScDocument* getFakeDoc() const { return mxFakeDoc.get(); }

private:
    struct RangeHash
    {
        size_t operator()(const ScRange& rRange) const
        {
            const ScAddress& s = rRange.aStart;
            const ScAddress& e = rRange.aEnd;
            size_t hash = 17;
            hash = hash * 37 + s.Tab();
            hash = hash * 37 + s.Col();
            hash = hash * 37 + s.Row();
            hash = hash * 37 + e.Tab();
            hash = hash * 37 + e.Col();
            hash = hash * 37 + e.Row();
            return hash;
        }
    };

    typedef std::unordered_map<OUString, TokenArrayRef> RangeNameMap;
    typedef std::unordered_map<ScRange, TokenArrayRef, RangeHash> RangeArrayMap;
    typedef std::unordered_map<OUString, OUString> NamePairMap;

    struct DocItem
    {
        ::std::vector<TableTypeRef> maTables;
        ::std::vector<TableName>    maTableNames;
        TableNameIndexMap           maTableNameIndex;
        RangeNameMap                maRangeNames;
        RangeArrayMap               maRangeArrays;
        NamePairMap                 maRealRangeNameMap;

        OUString                    maSingleTableNameAlias;

        bool mbInitFromSource;

        DocItem() : mbInitFromSource(false) {}

        TableNameIndexMap::const_iterator findTableNameIndex( const OUString& rTabName ) const;
        bool getTableDataIndex( const OUString& rTabName, size_t& rIndex ) const;
        bool getSingleTableNameAlternative( OUString& rTabName ) const;
    };
    typedef std::unordered_map<sal_uInt16, DocItem>  DocDataType;
    DocItem* getDocItem(sal_uInt16 nFileId) const;

private:
    mutable osl::Mutex maMtxDocs;
    mutable DocDataType maDocs;
    ScDocumentUniquePtr mxFakeDoc; // just to have something to pass to the methods that need to validate columns/rows
};

class SC_DLLPUBLIC ScExternalRefManager final : public formula::ExternalReferenceHelper, public SfxListener
{
public:

    typedef std::set<ScFormulaCell*>                      RefCellSet;
    typedef std::unordered_map<sal_uInt16, RefCellSet>         RefCellMap;

    enum LinkUpdateType { LINK_MODIFIED, LINK_BROKEN };

    class SAL_DLLPRIVATE LinkListener
    {
    public:
        LinkListener();
        virtual ~LinkListener() COVERITY_NOEXCEPT_FALSE = 0;
        virtual void notify(sal_uInt16 nFileId, LinkUpdateType eType) = 0;
    };

    class SC_DLLPUBLIC ApiGuard
    {
    public:
        ApiGuard(const ScDocument& rDoc);
        ~ApiGuard();
    private:
        ScExternalRefManager* mpMgr;
        bool mbOldInteractionEnabled;
    };

private:
    struct SrcShell
    {
        SfxObjectShellRef   maShell;
        tools::Time         maLastAccess;

        SrcShell() : maLastAccess( tools::Time::SYSTEM ) {}
    };

    typedef std::unordered_map<sal_uInt16, SrcShell>           DocShellMap;
    typedef std::unordered_map<sal_uInt16, bool>               LinkedDocMap;

    typedef std::unordered_map<sal_uInt16, SvNumberFormatterMergeMap> NumFmtMap;

    typedef o3tl::sorted_vector<LinkListener*>                     LinkListeners;
    typedef std::unordered_map<sal_uInt16, LinkListeners>          LinkListenerMap;

public:
    struct SAL_DLLPRIVATE SrcFileData
    {
        OUString maFileName;      
        OUString maRealFileName;  
        OUString maRelativeName;
        OUString maFilterName;
        OUString maFilterOptions;

        void maybeCreateRealFileName(const OUString& rOwnDocName);
    };

public:
    explicit ScExternalRefManager(ScDocument& rDoc);
    virtual ~ScExternalRefManager() override;

    virtual OUString getCacheTableName(sal_uInt16 nFileId, size_t nTabIndex) const override;

    ScExternalRefCache::TableTypeRef getCacheTable(sal_uInt16 nFileId, size_t nTabIndex) const;

    ScExternalRefCache::TableTypeRef getCacheTable(sal_uInt16 nFileId, const OUString& rTabName, bool bCreateNew,
            size_t* pnIndex = nullptr, const OUString* pExtUrl = nullptr);

    void getAllCachedTableNames(sal_uInt16 nFileId, ::std::vector<OUString>& rTabNames) const;

    SCTAB getCachedTabSpan(
        sal_uInt16 nFileId, const OUString& rStartTabName, const OUString& rEndTabName) const;

    void getAllCachedNumberFormats(::std::vector<sal_uInt32>& rNumFmts) const;

    sal_uInt16 getExternalFileCount() const;

    void markUsedByLinkListeners();

    void markUsedExternalRefCells();

    bool setCacheTableReferenced( sal_uInt16 nFileId, const OUString& rTabName, size_t nSheets );
    void setAllCacheTableReferencedStati( bool bReferenced );

    bool isInReferenceMarking() const   { return mbInReferenceMarking; }

    void storeRangeNameTokens(sal_uInt16 nFileId, const OUString& rName, const ScTokenArray& rArray);

    ScExternalRefCache::TokenRef getSingleRefToken(
        sal_uInt16 nFileId, const OUString& rTabName, const ScAddress& rCell,
        const ScAddress* pCurPos, SCTAB* pTab, ScExternalRefCache::CellFormat* pFmt = nullptr);

    ScExternalRefCache::TokenArrayRef getDoubleRefTokens(
        sal_uInt16 nFileId, const OUString& rTabName, const ScRange& rRange, const ScAddress* pCurPos);

    ScExternalRefCache::TokenArrayRef getRangeNameTokens(
        sal_uInt16 nFileId, const OUString& rName, const ScAddress* pCurPos = nullptr);

    bool isValidRangeName(sal_uInt16 nFileId, const OUString& rName);

    OUString getOwnDocumentName() const;
    bool isOwnDocument(const OUString& rFile) const;

    void convertToAbsName(OUString& rFile) const;
    sal_uInt16 getExternalFileId(const OUString& rFile);

    const OUString* getExternalFileName(sal_uInt16 nFileId, bool bForceOriginal = false);

    std::vector<OUString> getAllCachedExternalFileNames() const;

    bool hasExternalFile(sal_uInt16 nFileId) const;
    bool hasExternalFile(const OUString& rFile) const;
    const SrcFileData* getExternalFileData(sal_uInt16 nFileId) const;

    const OUString* getRealTableName(sal_uInt16 nFileId, const OUString& rTabName) const;
    const OUString* getRealRangeName(sal_uInt16 nFileId, const OUString& rRangeName) const;
    void clearCache(sal_uInt16 nFileId);
    bool refreshSrcDocument(sal_uInt16 nFileId);
    void breakLink(sal_uInt16 nFileId);
    void switchSrcFile(sal_uInt16 nFileId, const OUString& rNewFile, const OUString& rNewFilter);

    void setRelativeFileName(sal_uInt16 nFileId, const OUString& rRelUrl);

    void setFilterData(sal_uInt16 nFileId, const OUString& rFilterName, const OUString& rOptions);

    void clear();

    bool hasExternalData() const;

    void resetSrcFileData(const OUString& rBaseFileUrl);

    void updateAbsAfterLoad();

    void removeRefCell(ScFormulaCell* pCell);

    void addLinkListener(sal_uInt16 nFileId, LinkListener* pListener);

    void removeLinkListener(sal_uInt16 nFileId, LinkListener* pListener);

    void removeLinkListener(LinkListener* pListener);

    void notifyAllLinkListeners(sal_uInt16 nFileId, LinkUpdateType eType);

    bool isFileLoadable(const OUString& rFile) const;

    virtual void Notify( SfxBroadcaster& rBC, const SfxHint& rHint ) override;

    bool containsUnsavedReferences() const { return !maUnsavedDocShells.empty(); }

    void insertRefCell(sal_uInt16 nFileId, const ScAddress& rCell);
    void insertRefCellFromTemplate( ScFormulaCell* pTemplateCell, ScFormulaCell* pCell );

    bool hasCellExternalReference(const ScAddress& rCell);

    void enableDocTimer( bool bEnable );

    void addFilesToLinkManager();

private:
    ScExternalRefManager(const ScExternalRefManager&) = delete;

    void refreshAllRefCells(sal_uInt16 nFileId);

    void fillCellFormat(sal_uLong nFmtIndex, ScExternalRefCache::CellFormat* pFmt) const;

    bool getSrcDocTable( const ScDocument& rSrcDoc, const OUString& rTabName, SCTAB& rTab, sal_uInt16 nFileId ) const;

    ScExternalRefCache::TokenRef getSingleRefTokenFromSrcDoc(
        sal_uInt16 nFileId, ScDocument& rSrcDoc, const ScAddress& rPos,
        ScExternalRefCache::CellFormat* pFmt);

    ScExternalRefCache::TokenArrayRef getDoubleRefTokensFromSrcDoc(
        const ScDocument& rSrcDoc, const OUString& rTabName, ScRange& rRange,
        ::std::vector<ScExternalRefCache::SingleRangeData>& rCacheData);

    static ScExternalRefCache::TokenArrayRef getRangeNameTokensFromSrcDoc(
        sal_uInt16 nFileId, const ScDocument& rSrcDoc, OUString& rName);

    ScDocument* getInMemorySrcDocument(sal_uInt16 nFileId);
    ScDocument* getSrcDocument(sal_uInt16 nFileId);
    SfxObjectShellRef loadSrcDocument(sal_uInt16 nFileId, OUString& rFilter);

    ScDocument& cacheNewDocShell( sal_uInt16 nFileId, SrcShell& rSrcShell );

    void maybeLinkExternalFile( sal_uInt16 nFileId, bool bDeferFilterDetection = false );

    void maybeCreateRealFileName(sal_uInt16 nFileId);

    void purgeStaleSrcDocument(sal_Int32 nTimeOut);

    sal_uInt32 getMappedNumberFormat(sal_uInt16 nFileId, sal_uInt32 nNumFmt, const ScDocument& rSrcDoc);

    void transformUnsavedRefToSavedRef( SfxObjectShell* pShell );

private:
    ScDocument& mrDoc;

    ScExternalRefCache maRefCache;

    DocShellMap maDocShells;

    DocShellMap maUnsavedDocShells;

    LinkedDocMap maLinkedDocs;

    RefCellMap maRefCells;

    LinkListenerMap maLinkListeners;

    NumFmtMap maNumFormatMap;

    std::vector<SrcFileData> maSrcFiles;

    bool mbInReferenceMarking:1;

    bool mbUserInteractionEnabled:1;

    bool mbDocTimerEnabled:1;

    AutoTimer maSrcDocTimer;
    DECL_LINK(TimeOutHdl, Timer*, void);
};

#endif

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