xref: /aoo41x/main/sc/inc/externalrefmgr.hxx (revision cdf0e10c)

/*************************************************************************
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * Copyright 2000, 2010 Oracle and/or its affiliates.
 *
 * OpenOffice.org - a multi-platform office productivity suite
 *
 * This file is part of OpenOffice.org.
 *
 * OpenOffice.org is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License version 3
 * only, as published by the Free Software Foundation.
 *
 * OpenOffice.org is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License version 3 for more details
 * (a copy is included in the LICENSE file that accompanied this code).
 *
 * You should have received a copy of the GNU Lesser General Public License
 * version 3 along with OpenOffice.org.  If not, see
 * <http://www.openoffice.org/license.html>
 * for a copy of the LGPLv3 License.
 *
 ************************************************************************/

#ifndef SC_EXTERNALREFMGR_HXX
#define SC_EXTERNALREFMGR_HXX

#include "global.hxx"
#include "address.hxx"
#include "sfx2/objsh.hxx"
#include "sfx2/lnkbase.hxx"
#include "tools/time.hxx"
#include "vcl/timer.hxx"
#include "svl/zforlist.hxx"
#include "scmatrix.hxx"
#include "rangelst.hxx"

#include <hash_map>
#include <hash_set>
#include <boost/shared_ptr.hpp>
#include <vector>
#include <list>
#include <set>
#include <formula/ExternalReferenceHelper.hxx>

class ScDocument;
namespace formula
{
    class FormulaToken;
}
class ScToken;
class ScMatrix;
class ScTokenArray;
class String;
class SfxObjectShellRef;
class Window;
class ScFormulaCell;

class ScExternalRefCache;

class ScExternalRefLink : public ::sfx2::SvBaseLink
{
public:
    ScExternalRefLink(ScDocument* pDoc, sal_uInt16 nFileId, const String& rFilter);
    virtual ~ScExternalRefLink();

    virtual void Closed();
    virtual void DataChanged(const String& rMimeType, const ::com::sun::star::uno::Any & rValue);
    virtual void Edit(Window* pParent, const Link& rEndEditHdl);

    void SetDoReferesh(bool b);

private:
    ScExternalRefLink(); // disabled
    ScExternalRefLink(const ScExternalRefLink&); // disabled

    DECL_LINK( ExternalRefEndEditHdl, ::sfx2::SvBaseLink* );

    sal_uInt16  mnFileId;
    String      maFilterName;
    ScDocument* mpDoc;
    bool        mbDoRefresh;
};

// ============================================================================

/**
 * Cache table for external reference data.
 */
class ScExternalRefCache
{
public:
    typedef ::boost::shared_ptr< formula::FormulaToken>     TokenRef;
    typedef ::boost::shared_ptr<ScTokenArray>               TokenArrayRef;

    struct TableName
    {
        String maUpperName;
        String maRealName;

        explicit TableName(const String& rUppper, const String& rReal);
    };

    struct CellFormat
    {
        bool        mbIsSet;
        short       mnType;
        sal_uInt32  mnIndex;

        explicit CellFormat();
    };

private:
    /** individual cell within cached external ref table. */
    struct Cell
    {
        TokenRef    mxToken;
        sal_uInt32  mnFmtIndex;
    };
    typedef ::std::hash_map<SCCOL, Cell>            RowDataType;
    typedef ::std::hash_map<SCROW, RowDataType>     RowsDataType;

public:
    // SUNWS needs a forward declared friend, otherwise types and members
    // of the outer class are not accessible.
    class Table;
    friend class ScExternalRefCache::Table;

    /**
     * Represents a single cached table in an external document.  It only
     * stores non-empty cells; empty cells should never be stored in the data
     * cache. Instead, cached ranges should be used to determine whether or
     * not a cell is empty or needs fetching from the source document.  If a
     * cell's value is not stored but its address is within the cached ranges,
     * that cell is already queried in the source document and we know it's
     * empty.
     */
    class Table
    {
    public:

        enum ReferencedFlag
        {
            UNREFERENCED,
            REFERENCED_MARKED,      // marked as referenced during store to file
            REFERENCED_PERMANENT    // permanently marked, e.g. from within interpreter
        };

        Table();
        ~Table();

        /**
         * Add cell value to the cache.
         *
         * @param bSetCacheRange if true, mark this cell 'cached'.  This is
         *                       false _only when_ adding a range of cell
         *                       values, for performance reasons.
         */
        SC_DLLPUBLIC void setCell(SCCOL nCol, SCROW nRow, TokenRef pToken, sal_uInt32 nFmtIndex = 0, bool bSetCacheRange = true);
        SC_DLLPUBLIC TokenRef getCell(SCCOL nCol, SCROW nRow, sal_uInt32* pnFmtIndex = NULL) const;
        bool hasRow( SCROW nRow ) const;
        /** Set/clear referenced status flag only if current status is not
            REFERENCED_PERMANENT. */
        void setReferenced( bool bReferenced );
        /// Unconditionally set the reference status flag.
        void setReferencedFlag( ReferencedFlag eFlag );
        ReferencedFlag getReferencedFlag() const;
        bool isReferenced() const;
        /// Obtain a sorted vector of rows.
        void getAllRows(::std::vector<SCROW>& rRows, SCROW nLow = 0, SCROW nHigh = MAXROW) const;
        /// Returns the half-open range of used rows in this table. Returns [0,0) if table is empty.
        SC_DLLPUBLIC ::std::pair< SCROW, SCROW > getRowRange() const;
        /// Obtain a sorted vector of columns.
        void getAllCols(SCROW nRow, ::std::vector<SCCOL>& rCols, SCCOL nLow = 0, SCCOL nHigh = MAXCOL) const;
        /// Returns the half-open range of used columns in the specified row. Returns [0,0) if row is empty.
        SC_DLLPUBLIC ::std::pair< SCCOL, SCCOL > getColRange( SCROW nRow ) const;
        void getAllNumberFormats(::std::vector<sal_uInt32>& rNumFmts) const;
        const ScRangeList& getCachedRanges() 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);

        /**
         * Call this to mark the entire table "cached".  This will prevent all
         * future attempts to access the source document even when non-cached
         * cells are queried.  In such case, non-cached cells are treated as
         * empty cells.  Useful when loading a document with own external data
         * cache.
         */
        SC_DLLPUBLIC void setWholeTableCached();
    private:
        bool isInCachedRanges(SCCOL nCol, SCROW nRow) const;
        TokenRef getEmptyOrNullToken(SCCOL nCol, SCROW nRow) const;

    private:
        /** Data cache */
        RowsDataType                    maRows;
        /** Collection of individual cached ranges.  The table ranges are
         *  not used & always zero. */
        ScRangeList                     maCachedRanges;
        ReferencedFlag                  meReferenced;
    };

    typedef ::boost::shared_ptr<Table>      TableTypeRef;
    typedef ::std::hash_map<String, size_t, ScStringHashCode>   TableNameIndexMap;

    ScExternalRefCache();
    ~ScExternalRefCache();

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

    /**
     * Get a cached cell data at specified cell location.
     *
     * @param nFileId file ID of an external document
     * @param rTabName sheet name
     * @param nCol
     * @param nRow
     *
     * @return pointer to the token instance in the cache.
     */
    ScExternalRefCache::TokenRef getCellData(
        sal_uInt16 nFileId, const String& rTabName, SCCOL nCol, SCROW nRow, sal_uInt32* pnFmtIndex);

    /**
     * Get a cached cell range data.
     *
     * @return a new token array instance.  Note that <i>the caller must
     *         manage the life cycle of the returned instance</i>, which is
     *         guaranteed if the TokenArrayRef is properly used..
     */
    ScExternalRefCache::TokenArrayRef getCellRangeData(
        sal_uInt16 nFileId, const String& rTabName, const ScRange& rRange);

    ScExternalRefCache::TokenArrayRef getRangeNameTokens(sal_uInt16 nFileId, const String& rName);
    void setRangeNameTokens(sal_uInt16 nFileId, const String& rName, TokenArrayRef pArray);

    void setCellData(sal_uInt16 nFileId, const String& rTabName, SCCOL nCol, SCROW nRow, TokenRef pToken, sal_uInt32 nFmtIndex);

    struct SingleRangeData
    {
        /** This name must be in upper-case. */
        String      maTableName;
        ScMatrixRef mpRangeData;
    };
    void setCellRangeData(sal_uInt16 nFileId, const ScRange& rRange, const ::std::vector<SingleRangeData>& rData,
                          TokenArrayRef pArray);

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

    /**
     * Set all tables of a document as referenced, used only during
     * store-to-file.
     * @returns <TRUE/> if ALL tables of ALL documents are marked.
     */
    bool setCacheDocReferenced( sal_uInt16 nFileId );

    /**
     * Set a table as referenced, used only during store-to-file.
     * @returns <TRUE/> if ALL tables of ALL documents are marked.
     */
    bool setCacheTableReferenced( sal_uInt16 nFileId, const String& rTabName, size_t nSheets, bool bPermanent );
    void setAllCacheTableReferencedStati( bool bReferenced );
    bool areAllCacheTablesReferenced() const;

    /**
     * Set a table as permanently referenced, to be called if not in
     * mark-during-store-to-file cycle.
     */
    void setCacheTableReferencedPermanently( sal_uInt16 nFileId, const String& rTabName, size_t nSheets );

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();
        explicit    ReferencedStatus( size_t nDocs );
        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 String& rTabName, bool bCreateNew, size_t* pnIndex);

    void clearCache(sal_uInt16 nFileId);

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

    typedef ::std::hash_map<String, TokenArrayRef, ScStringHashCode>    RangeNameMap;
    typedef ::std::hash_map<ScRange, TokenArrayRef, RangeHash>          RangeArrayMap;
    typedef ::std::hash_map<String, String, ScStringHashCode>           NamePairMap;

    // SUNWS needs a forward declared friend, otherwise types and members
    // of the outer class are not accessible.
    struct DocItem;
    friend struct ScExternalRefCache::DocItem;

    /** Represents data cached for a single external document. */
    struct DocItem
    {
        /** The raw cache tables. */
        ::std::vector<TableTypeRef> maTables;
        /** Table name list in correct order, in both upper- and real-case. */
        ::std::vector<TableName>    maTableNames;
        /** Table name to index map.  The names must be stored upper-case. */
        TableNameIndexMap           maTableNameIndex;
        /** Range name cache. */
        RangeNameMap                maRangeNames;
        /** Token array cache for cell ranges. */
        RangeArrayMap               maRangeArrays;
        /** Upper- to real-case mapping for range names. */
        NamePairMap                 maRealRangeNameMap;

        bool mbInitFromSource;

        DocItem() : mbInitFromSource(false) {}
    };
    typedef ::std::hash_map<sal_uInt16, DocItem>  DocDataType;
    DocItem* getDocItem(sal_uInt16 nFileId) const;

private:
    mutable DocDataType maDocs;
};

// ============================================================================

class SC_DLLPUBLIC ScExternalRefManager : public formula::ExternalReferenceHelper
{
public:

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

    enum LinkUpdateType { LINK_MODIFIED, LINK_BROKEN };

    /**
     * Base class for objects that need to listen to link updates.  When a
     * link to a certain external file is updated, the notify() method gets
     * called.
     */
    class LinkListener
    {
    public:
        LinkListener();
        virtual ~LinkListener() = 0;
        virtual void notify(sal_uInt16 nFileId, LinkUpdateType eType) = 0;

        struct Hash
        {
            size_t operator() (const LinkListener* p) const
            {
                return reinterpret_cast<size_t>(p);
            }
        };
    };

    /**
     * Use this guard when performing something from the API that might query
     * values from external references.  Interpreting formula strings is one
     * such example.
     */
    class ApiGuard
    {
    public:
        ApiGuard(ScDocument* pDoc);
        ~ApiGuard();
    private:
        ScExternalRefManager* mpMgr;
        bool mbOldInteractionEnabled;
    };

private:
    /** Shell instance for a source document. */
    struct SrcShell
    {
        SfxObjectShellRef   maShell;
        Time                maLastAccess;
    };

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

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


    typedef ::std::hash_set<LinkListener*, LinkListener::Hash>  LinkListeners;
    typedef ::std::hash_map<sal_uInt16, LinkListeners>          LinkListenerMap;

public:
    /** Source document meta-data container. */
    struct SrcFileData
    {
        String maFileName;      /// original file name as loaded from the file.
        String maRealFileName;  /// file name created from the relative name.
        String maRelativeName;
        String maFilterName;
        String maFilterOptions;

        void maybeCreateRealFileName(const String& rOwnDocName);
    };

public:
    explicit ScExternalRefManager(ScDocument* pDoc);
    virtual ~ScExternalRefManager();

    virtual String getCacheTableName(sal_uInt16 nFileId, size_t nTabIndex) const;

    /**
     * Get a cache table instance for specified table and table index.  Unlike
     * the other method that takes a table name, this method does not create a
     * new table when a table is not available for specified index.
     *
     * @param nFileId file ID
     * @param nTabIndex cache table index
     *
     * @return shared_ptr to the cache table instance
     */
    ScExternalRefCache::TableTypeRef getCacheTable(sal_uInt16 nFileId, size_t nTabIndex) const;

    /**
     * Get a cache table instance for specified file and table name.  If the
     * table instance is not already present, it'll instantiate a new one and
     * append it to the end of the table array.  <I>It's important to be
     * aware of this fact especially for multi-table ranges for which
     * table orders are critical.</I>
     *
     * Excel filter calls this method to populate the cache table from the
     * XCT/CRN records.
     *
     * @param nFileId file ID
     * @param rTabName table name
     * @param bCreateNew if true, create a new table instance if it's not
     *                   already present.  If false, it returns NULL if the
     *                   specified table's cache doesn't exist.
     * @param pnIndex if non-NULL pointer is passed, it stores the internal
     *                index of a cache table instance.
     *
     * @return shared_ptr to the cache table instance
     */
    ScExternalRefCache::TableTypeRef getCacheTable(sal_uInt16 nFileId, const String& rTabName, bool bCreateNew, size_t* pnIndex = 0);

    /** Returns a vector containing all (real) table names and cache tables of
        the specified file.

        The index in the returned vector corresponds to the table index used to
        access the cache table, e.g. in getCacheTable().
     */
    void getAllCachedTableNames(sal_uInt16 nFileId, ::std::vector<String>& rTabNames) const;

    /**
     * Get the span (distance+sign(distance)) of two sheets of a specified
     * file.
     *
     * @param nFileId file ID
     * @param rStartTabName name of first sheet (sheet1)
     * @param rEndTabName name of second sheet (sheet2)
     *
     * @return span
     *         1 if sheet2 == sheet1
     *      >  1 if sheet2 > sheet1
     *      < -1 if sheet2 < sheet1
     *        -1 if nFileId or rStartTabName not found
     *         0 if rEndTabName not found
     */
    SCsTAB getCachedTabSpan( sal_uInt16 nFileId, const String& rStartTabName, const String& rEndTabName ) const;

    /**
     * Get all unique number format indices that are used in the cache tables.
     * The retrieved indices are sorted in ascending order.
     *
     * @param rNumFmts (reference) all unique number format indices.
     */
    void getAllCachedNumberFormats(::std::vector<sal_uInt32>& rNumFmts) const;

    sal_uInt16 getExternalFileCount() const;

    /**
     * Mark all tables as referenced that are used by any LinkListener, used
     * only during store-to-file.
     * @returns <TRUE/> if ALL tables of ALL external documents are marked.
     */
    bool markUsedByLinkListeners();

    bool markUsedExternalRefCells();

    /**
     * Set a table as referenced, used only during store-to-file.
     * @returns <TRUE/> if ALL tables of ALL external documents are marked.
     */
    bool setCacheTableReferenced( sal_uInt16 nFileId, const String& rTabName, size_t nSheets );
    void setAllCacheTableReferencedStati( bool bReferenced );

    /**
     * Set a table as permanently referenced, to be called if not in
     * mark-during-store-to-file cycle.
     */
    void setCacheTableReferencedPermanently( sal_uInt16 nFileId, const String& rTabName, size_t nSheets );

    /**
     * @returns <TRUE/> if setAllCacheTableReferencedStati(false) was called,
     * <FALSE/> if setAllCacheTableReferencedStati(true) was called.
     */
    bool isInReferenceMarking() const   { return mbInReferenceMarking; }

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

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

    /**
     * Get an array of tokens that consist of the specified external cell
     * range.
     *
     * @param nFileId file ID for an external document
     * @param rTabName referenced sheet name
     * @param rRange referenced cell range
     * @param pCurPos current cursor position to keep track of cells that
     *                reference an external data.
     *
     * @return shared_ptr to a token array instance.  <i>The caller must not
     *         delete the instance returned by this method.</i>
     */
    ScExternalRefCache::TokenArrayRef getDoubleRefTokens(
        sal_uInt16 nFileId, const String& rTabName, const ScRange& rRange, const ScAddress* pCurPos);

    /**
     * Get an array of tokens corresponding with a specified name in a
     * specified file.
     *
     * @param pCurPos currnet cell address where this name token is used.
     *                This is purely to keep track of all cells containing
     *                external names for refreshing purposes.  If this is
     *                NULL, then the cell will not be added to the list.
     *
     * @return shared_ptr to array of tokens composing the name
     */
    ScExternalRefCache::TokenArrayRef getRangeNameTokens(
        sal_uInt16 nFileId, const String& rName, const ScAddress* pCurPos = NULL);

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

    /**
     * Takes a flat file name, and convert it to an absolute URL path.  An
     * absolute URL path begines with 'file:///.
     *
     * @param rFile file name to convert
     */
    void convertToAbsName(String& rFile) const;
    sal_uInt16 getExternalFileId(const String& rFile);

    /**
     * It returns a pointer to the name of the URI associated with a given
     * external file ID.  In case the original document has moved, it returns
     * an URI adjusted for the relocation.
     *
     * @param nFileId file ID for an external document
     * @param bForceOriginal If true, it always returns the original document
     *                       URI even if the referring document has relocated.
     *                       If false, it returns an URI adjusted for
     *                       relocated document.
     *
     * @return const String* external document URI.
     */
    const String* getExternalFileName(sal_uInt16 nFileId, bool bForceOriginal = false);
    bool hasExternalFile(sal_uInt16 nFileId) const;
    bool hasExternalFile(const String& rFile) const;
    const SrcFileData* getExternalFileData(sal_uInt16 nFileId) const;

    const String* getRealTableName(sal_uInt16 nFileId, const String& rTabName) const;
    const String* getRealRangeName(sal_uInt16 nFileId, const String& rRangeName) const;
    void refreshNames(sal_uInt16 nFileId);
    void breakLink(sal_uInt16 nFileId);
    void switchSrcFile(sal_uInt16 nFileId, const String& rNewFile, const String& rNewFilter);

    /**
     * Set a relative file path for the specified file ID.  Note that the
     * caller must ensure that the passed URL is a valid relative URL.
     *
     * @param nFileId file ID for an external document
     * @param rRelUrl relative URL
     */
    void setRelativeFileName(sal_uInt16 nFileId, const String& rRelUrl);

    /**
     * Set the filter name and options if any for a given source document.
     * These values get reset when the source document ever gets reloaded.
     *
     * @param nFileId
     * @param rFilterName
     * @param rOptions
     */
    void setFilterData(sal_uInt16 nFileId, const String& rFilterName, const String& rOptions);

    void clear();

    bool hasExternalData() const;

    /**
     * Re-generates relative names for all stored source files.  This is
     * necessary when exporting to an ods document, to ensure that all source
     * files have their respective relative names for xlink:href export.
     *
     * @param rBaseFileUrl Absolute URL of the content.xml fragment of the
     *                     document being exported.
     */
    void resetSrcFileData(const String& rBaseFileUrl);

    /**
     * Replace the original URL wirh the real URL that was generated from the relative URL.
     */
    void updateAbsAfterLoad();

    /**
     * Stop tracking a specific formula cell.
     *
     * @param pCell pointer to cell that formerly contained external
     *              reference.
     */
    void removeRefCell(ScFormulaCell* pCell);

    /**
     * Register a new link listener to a specified external document.  Note
     * that the caller is responsible for managing the life cycle of the
     * listener object.
     */
    void addLinkListener(sal_uInt16 nFileId, LinkListener* pListener);

    /**
     * Remove an existing link listener.  Note that removing a listener
     * pointer here does not delete the listener object instance.
     */
    void removeLinkListener(sal_uInt16 nFileId, LinkListener* pListener);

    void removeLinkListener(LinkListener* pListener);

    /**
     * Notify all listeners that are listening to a specified external
     * document.
     *
     * @param nFileId file ID for an external document.
     */
    void notifyAllLinkListeners(sal_uInt16 nFileId, LinkUpdateType eType);

private:
    ScExternalRefManager();
    ScExternalRefManager(const ScExternalRefManager&);

    void refreshAllRefCells(sal_uInt16 nFileId);

    void insertRefCell(sal_uInt16 nFileId, const ScAddress& rCell);

    ScDocument* getSrcDocument(sal_uInt16 nFileId);
    SfxObjectShellRef loadSrcDocument(sal_uInt16 nFileId, String& rFilter);
    bool isFileLoadable(const String& rFile) const;

    void maybeLinkExternalFile(sal_uInt16 nFileId);

    /**
     * Try to create a "real" file name from the relative path.  The original
     * file name may not point to the real document when the referencing and
     * referenced documents have been moved.
     *
     * For the real file name to be created, the relative name should not be
     * empty before calling this method, or the real file name will not be
     * created.
     *
     * @param nFileId file ID for an external document
     */
    void maybeCreateRealFileName(sal_uInt16 nFileId);

    /**
     * Purge those source document instances that have not been accessed for
     * the specified duration.
     *
     * @param nTimeOut time out value in 100th of a second
     */
    void purgeStaleSrcDocument(sal_Int32 nTimeOut);

    sal_uInt32 getMappedNumberFormat(sal_uInt16 nFileId, sal_uInt32 nNumFmt, ScDocument* pSrcDoc);

private:
    /** cache of referenced ranges and names from source documents. */
    ScExternalRefCache maRefCache;

    ScDocument* mpDoc;

    /**
     * Source document cache.  This stores the original source document shell
     * instances.  They get purged after a certain period of time.
     */
    DocShellMap maDocShells;

    /** list of source documents that are managed by the link manager. */
    LinkedDocMap maLinkedDocs;

    /**
     * List of referencing cells that may contain external names.  There is
     * one list per source document.
     */
    RefCellMap maRefCells;

    LinkListenerMap maLinkListeners;

    NumFmtMap maNumFormatMap;

    /** original source file index. */
    ::std::vector<SrcFileData> maSrcFiles;

    /** Status whether in reference marking state. See isInReferenceMarking(). */
    bool mbInReferenceMarking:1;

    /**
     * Controls whether or not to allow user interaction.  We don't want any
     * user interaction when calling from the API.
     */
    bool mbUserInteractionEnabled:1;

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


#endif