/**************************************************************
 * 
 * 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
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * 
 *************************************************************/


#ifndef SC_FUNCDESC_HXX
#define SC_FUNCDESC_HXX

/* Function descriptions for function wizard / autopilot / most recent used
 * list et al. Separated from the global.hxx lump, implementation still in
 * global.cxx
 */

#include <tools/list.hxx>
#include <tools/string.hxx>
#include <formula/IFunctionDescription.hxx>

#define MAX_FUNCCAT 12  /* maximum number of categories for functions */

class ScFuncDesc : public formula::IFunctionDescription
{
public:

    virtual ::rtl::OUString getFunctionName() const ;
    virtual const formula::IFunctionCategory* getCategory() const ;
    virtual ::rtl::OUString getDescription() const ;
    // GetSuppressedArgCount
    virtual xub_StrLen getSuppressedArgumentCount() const ;
    /** Returns the function signature with parameters from the passed string array. */
    virtual ::rtl::OUString getFormula(const ::std::vector< ::rtl::OUString >& _aArguments) const ;
    // GetVisibleArgMapping
    /** Returns mapping from visible arguments to real arguments, e.g. if of 4
        parameters the second one is suppressed {0,2,3}. For VAR_ARGS
        parameters only one element is added to the end of the sequence. */
    virtual void fillVisibleArgumentMapping(::std::vector<sal_uInt16>& _rArguments) const ;
    virtual void initArgumentInfo()  const;
    virtual ::rtl::OUString getSignature() const ;
    virtual rtl::OString getHelpId() const ;

    // parameter
    virtual sal_uInt32 getParameterCount() const ;
    virtual ::rtl::OUString getParameterName(sal_uInt32 _nPos) const ;
    virtual ::rtl::OUString getParameterDescription(sal_uInt32 _nPos) const ;
    virtual bool isParameterOptional(sal_uInt32 _nPos) const ;

    struct ParameterFlags
    {
        bool    bOptional   :1;     // Parameter is optional
        bool    bSuppress   :1;     // Suppress parameter in UI because not implemented yet

        ParameterFlags() : bOptional(false), bSuppress(false) {}
    };

    
    ScFuncDesc();
    virtual ~ScFuncDesc();

    void        Clear();

    /** Returns a semicolon separated list of all parameter names. */
    String  GetParamList        () const;
    /** Returns the full function signature: "FUNCTIONNAME( parameter list )". */
    String  GetSignature        () const;
    
    
    /** Returns the number of non-suppressed arguments. In case there are
        variable arguments the number of fixed non-suppressed arguments plus
        VAR_ARGS, same as for nArgCount (variable arguments can't be
        suppressed). */
    sal_uInt16  GetSuppressedArgCount() const;

    String          *pFuncName;              // Function name
    String          *pFuncDesc;              // Description of function
    String         **ppDefArgNames;          // Parameter name(s)
    String         **ppDefArgDescs;          // Description(s) of parameter(s)
    ParameterFlags  *pDefArgFlags;           // Flags for each parameter
    sal_uInt16           nFIndex;                // Unique function index
    sal_uInt16           nCategory;              // Function category
    sal_uInt16           nArgCount;              // All parameter count, suppressed and unsuppressed
    rtl::OString     sHelpId;                // HelpID of function
    bool             bIncomplete         :1; // Incomplete argument info (set for add-in info from configuration)
    bool             bHasSuppressedArgs  :1; // Whether there is any suppressed parameter.
};

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

class ScFunctionList
{
public:
    ScFunctionList();
    ~ScFunctionList();

    sal_uLong           GetCount() const
                    { return aFunctionList.Count(); }

    const ScFuncDesc*   First()
                        { return (const ScFuncDesc*) aFunctionList.First(); }

    const ScFuncDesc*   Next()
                        { return (const ScFuncDesc*) aFunctionList.Next(); }

    const ScFuncDesc*   GetFunction( sal_uLong nIndex ) const
                    { return (const ScFuncDesc*) aFunctionList.GetObject( nIndex ); }

    xub_StrLen      GetMaxFuncNameLen() const
                    { return nMaxFuncNameLen; }

private:
    List        aFunctionList;
    xub_StrLen  nMaxFuncNameLen;
};

//============================================================================
class ScFunctionCategory : public formula::IFunctionCategory
{
    ScFunctionMgr* m_pMgr;
    List* m_pCategory;
    mutable ::rtl::OUString m_sName;
    sal_uInt32 m_nCategory;
public:
    ScFunctionCategory(ScFunctionMgr* _pMgr,List* _pCategory,sal_uInt32 _nCategory) : m_pMgr(_pMgr),m_pCategory(_pCategory),m_nCategory(_nCategory){}
    virtual ~ScFunctionCategory(){}
    virtual sal_uInt32                          getCount() const;
    virtual const formula::IFunctionManager*        getFunctionManager() const;
    virtual const formula::IFunctionDescription*    getFunction(sal_uInt32 _nPos) const;
    virtual sal_uInt32                          getNumber() const;
    virtual ::rtl::OUString                     getName() const;
};
//============================================================================
#define SC_FUNCGROUP_COUNT  ID_FUNCTION_GRP_ADDINS
class ScFunctionMgr : public formula::IFunctionManager
{
public:
            ScFunctionMgr();
    virtual ~ScFunctionMgr();

    static String       GetCategoryName(sal_uInt32 _nCategoryNumber );

    const ScFuncDesc*   Get( const String& rFName ) const;
    const ScFuncDesc*   Get( sal_uInt16 nFIndex ) const;
    const ScFuncDesc*   First( sal_uInt16 nCategory = 0 ) const;
    const ScFuncDesc*   Next() const;

    // formula::IFunctionManager
    virtual sal_uInt32                              getCount() const;
    virtual const formula::IFunctionCategory*       getCategory(sal_uInt32 nPos) const;
    virtual void                                    fillLastRecentlyUsedFunctions(::std::vector< const formula::IFunctionDescription*>& _rLastRUFunctions) const;
    virtual const formula::IFunctionDescription*    getFunctionByName(const ::rtl::OUString& _sFunctionName) const;
    virtual sal_Unicode                       		getSingleToken(const formula::IFunctionManager::EToken _eToken) const;
private:
    ScFunctionList* pFuncList;
    List*           aCatLists[MAX_FUNCCAT];
    mutable List*   pCurCatList;
};

//============================================================================
#endif // SC_FUNCDESC_HXX