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/**************************************************************
*
* 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 INCLUDED_RECURSIONHELPER_HXX
#define INCLUDED_RECURSIONHELPER_HXX
#include "formularesult.hxx"
#include <list>
#include <stack>
#include <tools/solar.h>
class ScFormulaCell;
struct ScFormulaRecursionEntry
{
ScFormulaCell* pCell;
sal_Bool bOldRunning;
ScFormulaResult aPreviousResult;
ScFormulaRecursionEntry( ScFormulaCell* p, sal_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;
sal_uInt16 nRecursionCount;
sal_uInt16 nIteration;
bool bInRecursionReturn;
bool bDoingRecursion;
bool bInIterationReturn;
bool bConverging;
void Init()
{
nRecursionCount = 0;
bInRecursionReturn = bDoingRecursion = bInIterationReturn = false;
aInsertPos = GetEnd();
ResetIteration();
}
void ResetIteration()
{
aLastIterationStart = GetEnd();
nIteration = 0;
bConverging = false;
}
public:
ScRecursionHelper() { Init(); }
sal_uInt16 GetRecursionCount() const { return nRecursionCount; }
void IncRecursionCount() { ++nRecursionCount; }
void DecRecursionCount() { --nRecursionCount; }
/// A pure recursion return, no iteration.
bool IsInRecursionReturn() const { return bInRecursionReturn &&
!bInIterationReturn; }
void SetInRecursionReturn( bool b )
{
// Do not use IsInRecursionReturn() here, it decouples iteration.
if (b && !bInRecursionReturn)
aInsertPos = aRecursionFormulas.begin();
bInRecursionReturn = b;
}
bool IsDoingRecursion() const { return bDoingRecursion; }
void SetDoingRecursion( bool b ) { bDoingRecursion = b; }
void Insert( ScFormulaCell* p, sal_Bool bOldRunning,
const ScFormulaResult & rRes )
{
aRecursionFormulas.insert( aInsertPos, ScFormulaRecursionEntry( p,
bOldRunning, rRes));
}
ScFormulaRecursionList::iterator GetStart()
{
return aRecursionFormulas.begin();
}
ScFormulaRecursionList::iterator GetEnd()
{
return aRecursionFormulas.end();
}
bool IsInIterationReturn() const { return bInIterationReturn; }
void SetInIterationReturn( bool b )
{
// An iteration return is always coupled to a recursion return.
SetInRecursionReturn( b);
bInIterationReturn = b;
}
bool IsDoingIteration() const { return nIteration > 0; }
sal_uInt16 GetIteration() const { return nIteration; }
bool & GetConvergingReference() { return bConverging; }
void StartIteration()
{
SetInIterationReturn( false);
nIteration = 1;
bConverging = false;
aLastIterationStart = GetIterationStart();
}
void ResumeIteration()
{
SetInIterationReturn( false);
aLastIterationStart = GetIterationStart();
}
void IncIteration() { ++nIteration; }
void EndIteration()
{
aRecursionFormulas.erase( GetIterationStart(), GetIterationEnd());
ResetIteration();
}
ScFormulaRecursionList::iterator GetLastIterationStart() { return aLastIterationStart; }
ScFormulaRecursionList::iterator GetIterationStart() { return GetStart(); }
ScFormulaRecursionList::iterator GetIterationEnd() { return GetEnd(); }
/** 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()
{
aRecursionFormulas.clear();
while (!aRecursionInIterationStack.empty())
aRecursionInIterationStack.pop();
Init();
}
};
#endif // INCLUDED_RECURSIONHELPER_HXX
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