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/* -*- 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 .
*/
#ifndef INCLUDED_SC_INC_RECURSIONHELPER_HXX
#define INCLUDED_SC_INC_RECURSIONHELPER_HXX
#include "formularesult.hxx"
#include <list>
#include <vector>
#include <stack>
#include <o3tl/sorted_vector.hxx>
class ScFormulaCell;
struct ScFormulaRecursionEntry
{
ScFormulaCell* pCell;
bool bOldRunning;
ScFormulaResult aPreviousResult;
ScFormulaRecursionEntry(
ScFormulaCell* p, bool bR, const ScFormulaResult & rRes ) :
pCell(p), bOldRunning(bR), aPreviousResult( rRes)
{
}
};
typedef ::std::list< ScFormulaRecursionEntry > ScFormulaRecursionList;
class ScRecursionHelper
{
typedef ::std::stack< ScFormulaCell* > ScRecursionInIterationStack;
ScFormulaRecursionList aRecursionFormulas;
ScFormulaRecursionList::iterator aInsertPos;
ScFormulaRecursionList::iterator aLastIterationStart;
ScRecursionInIterationStack aRecursionInIterationStack;
std::vector< ScFormulaCell* > aFGList;
// Flag list corresponding to aFGList to indicate whether each formula-group
// is in a dependency evaluation mode or not.
std::vector< bool > aInDependencyEvalMode;
sal_uInt16 nRecursionCount;
sal_uInt16 nIteration;
// Count of ScFormulaCell::CheckComputeDependencies in current call-stack.
sal_uInt16 nDependencyComputationLevel;
bool bInRecursionReturn;
bool bDoingRecursion;
bool bInIterationReturn;
bool bConverging;
bool bGroupsIndependent;
bool bAbortingDependencyComputation;
std::vector< ScFormulaCell* > aTemporaryGroupCells;
o3tl::sorted_vector< ScFormulaCellGroup* >* pFGSet;
void Init();
void ResetIteration();
public:
ScRecursionHelper();
sal_uInt16 GetRecursionCount() const { return nRecursionCount; }
void IncRecursionCount() { ++nRecursionCount; }
void DecRecursionCount() { --nRecursionCount; }
sal_uInt16 GetDepComputeLevel() const { return nDependencyComputationLevel; }
void IncDepComputeLevel();
void DecDepComputeLevel();
/// A pure recursion return, no iteration.
bool IsInRecursionReturn() const { return bInRecursionReturn &&
!bInIterationReturn; }
void SetInRecursionReturn( bool b );
bool IsDoingRecursion() const { return bDoingRecursion; }
void SetDoingRecursion( bool b ) { bDoingRecursion = b; }
void Insert( ScFormulaCell* p, bool bOldRunning, const ScFormulaResult & rRes );
bool IsInIterationReturn() const { return bInIterationReturn; }
void SetInIterationReturn( bool b );
bool IsDoingIteration() const { return nIteration > 0; }
sal_uInt16 GetIteration() const { return nIteration; }
bool & GetConvergingReference() { return bConverging; }
void StartIteration();
void ResumeIteration();
void IncIteration();
void EndIteration();
const ScFormulaRecursionList::iterator& GetLastIterationStart() const { return aLastIterationStart; }
ScFormulaRecursionList::iterator GetIterationStart();
ScFormulaRecursionList::iterator GetIterationEnd();
/** Any return, recursion or iteration, iteration is always coupled with
recursion. */
bool IsInReturn() const { return bInRecursionReturn; }
const ScFormulaRecursionList& GetList() const { return aRecursionFormulas; }
ScFormulaRecursionList& GetList() { return aRecursionFormulas; }
ScRecursionInIterationStack& GetRecursionInIterationStack() { return aRecursionInIterationStack; }
void Clear();
/** Detects a simple cycle involving formula-groups and singleton formula-cells. */
bool PushFormulaGroup(ScFormulaCell* pCell);
void PopFormulaGroup();
bool AnyCycleMemberInDependencyEvalMode(const ScFormulaCell* pCell);
bool AnyParentFGInCycle();
void SetFormulaGroupDepEvalMode(bool bSet);
// When dependency computation detects a cycle, it may not compute proper cell values.
// This sets a flag that ScFormulaCell will use to avoid setting those new values
// and resetting the dirty flag, until the dependency computation bails out.
void AbortDependencyComputation();
bool IsAbortingDependencyComputation() const { return bAbortingDependencyComputation; }
void AddTemporaryGroupCell(ScFormulaCell* cell);
void CleanTemporaryGroupCells();
void SetFormulaGroupSet(o3tl::sorted_vector<ScFormulaCellGroup*>* pSet) { pFGSet = pSet; }
bool HasFormulaGroupSet() const { return pFGSet != nullptr; }
bool CheckFGIndependence(ScFormulaCellGroup* pFG);
void SetGroupsIndependent(bool bSet) { bGroupsIndependent = bSet; }
bool AreGroupsIndependent() { return bGroupsIndependent; }
};
/** A class to wrap ScRecursionHelper::PushFormulaGroup(),
ScRecursionHelper::PopFormulaGroup() and make these calls
exception safe. */
class ScFormulaGroupCycleCheckGuard
{
ScRecursionHelper& mrRecHelper;
bool mbShouldPop;
public:
ScFormulaGroupCycleCheckGuard() = delete;
ScFormulaGroupCycleCheckGuard(ScRecursionHelper& rRecursionHelper, ScFormulaCell* pCell);
~ScFormulaGroupCycleCheckGuard();
};
class ScFormulaGroupDependencyComputeGuard
{
ScRecursionHelper& mrRecHelper;
public:
ScFormulaGroupDependencyComputeGuard() = delete;
ScFormulaGroupDependencyComputeGuard(ScRecursionHelper& rRecursionHelper);
~ScFormulaGroupDependencyComputeGuard();
};
class ScCheckIndependentFGGuard
{
ScRecursionHelper& mrRecHelper;
bool mbUsedFGSet;
public:
ScCheckIndependentFGGuard() = delete;
ScCheckIndependentFGGuard(ScRecursionHelper& rRecursionHelper,
o3tl::sorted_vector<ScFormulaCellGroup*>* pSet);
~ScCheckIndependentFGGuard();
bool AreGroupsIndependent();
};
#endif // INCLUDED_SC_INC_RECURSIONHELPER_HXX
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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