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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/.
*/
#include <grouptokenconverter.hxx>
#include <document.hxx>
#include <formulacell.hxx>
#include <tokenarray.hxx>
#include <refdata.hxx>
#include <formula/token.hxx>
#include <formula/vectortoken.hxx>
using namespace formula;
bool ScGroupTokenConverter::isSelfReferenceRelative(const ScAddress& rRefPos, SCROW nRelRow)
{
if (rRefPos.Col() != mrPos.Col() || rRefPos.Tab() != mrPos.Tab())
return false;
SCROW nLen = mrCell.GetCellGroup()->mnLength;
SCROW nEndRow = mrPos.Row() + nLen - 1;
if (nRelRow < 0)
{
SCROW nTest = nEndRow;
nTest += nRelRow;
if (nTest >= mrPos.Row())
return true;
}
else if (nRelRow > 0)
{
SCROW nTest = mrPos.Row(); // top row.
nTest += nRelRow;
if (nTest <= nEndRow)
return true;
}
return false;
}
bool ScGroupTokenConverter::isSelfReferenceAbsolute(const ScAddress& rRefPos)
{
if (rRefPos.Col() != mrPos.Col() || rRefPos.Tab() != mrPos.Tab())
return false;
SCROW nLen = mrCell.GetCellGroup()->mnLength;
SCROW nEndRow = mrPos.Row() + nLen - 1;
if (rRefPos.Row() < mrPos.Row())
return false;
if (rRefPos.Row() > nEndRow)
return false;
return true;
}
SCROW ScGroupTokenConverter::trimLength(SCTAB nTab, SCCOL nCol1, SCCOL nCol2, SCROW nRow, SCROW nRowLen)
{
SCROW nLastRow = nRow + nRowLen - 1; // current last row.
nLastRow = mrDoc.GetLastDataRow(nTab, nCol1, nCol2, nLastRow);
if (nLastRow < (nRow + nRowLen - 1))
{
// This can end up negative! Was that the original intent, or
// is it accidental? Was it not like that originally but the
// surrounding conditions changed?
nRowLen = nLastRow - nRow + 1;
// Anyway, let's assume it doesn't make sense to return a
// negative value here. But should we then return 0 or 1? In
// the "Column is empty" case below, we return 1, why!? And,
// at the callsites there are tests for a zero value returned
// from this function (but not for a negative one).
if (nRowLen < 0)
nRowLen = 0;
}
else if (nLastRow == 0)
// Column is empty.
nRowLen = 1;
return nRowLen;
}
ScGroupTokenConverter::ScGroupTokenConverter(
ScTokenArray& rGroupTokens, ScDocument& rDoc, const ScFormulaCell& rCell, const ScAddress& rPos) :
mrGroupTokens(rGroupTokens),
mrDoc(rDoc),
mrCell(rCell),
mrPos(rPos)
{
}
bool ScGroupTokenConverter::convert( const ScTokenArray& rCode, sc::FormulaLogger::GroupScope& rScope )
{
#if 0
{ // debug to start with:
ScCompiler aComp( &mrDoc, mrPos, rCode, formula::FormulaGrammar::GRAM_NATIVE_XL_R1C1);
OUStringBuffer aAsString;
aComp.CreateStringFromTokenArray(aAsString);
}
#endif
const SCROW nLen = mrCell.GetCellGroup()->mnLength;
formula::FormulaTokenArrayPlainIterator aIter(rCode);
for (const formula::FormulaToken* p = aIter.First(); p; p = aIter.Next())
{
// A reference can be either absolute or relative. If it's absolute,
// convert it to a static value token. If relative, convert it to a
// vector reference token. Note: we only care about relative vs
// absolute reference state for row directions.
switch (p->GetType())
{
case svSingleRef:
{
ScSingleRefData aRef = *p->GetSingleRef();
if( aRef.IsDeleted())
return false;
ScAddress aRefPos = aRef.toAbs(mrDoc, mrPos);
if (aRef.IsRowRel())
{
if (isSelfReferenceRelative(aRefPos, aRef.Row()))
return false;
// Trim data array length to actual data range.
SCROW nTrimLen = trimLength(aRefPos.Tab(), aRefPos.Col(), aRefPos.Col(), aRefPos.Row(), nLen);
// Fetch double array guarantees that the length of the
// returned array equals or greater than the requested
// length.
formula::VectorRefArray aArray;
if (nTrimLen)
{
#ifdef DBG_UTIL
// All the necessary Interpret() calls for all the cells
// should have been already handled by ScDependantsCalculator
// calling HandleRefArrayForParallelism(), and that handling also checks
// for cycles etc. Recursively calling Interpret() from here (which shouldn't
// happen) could lead to unhandled problems.
// Also, because of caching FetchVectorRefArray() fetches values for all rows
// up to the maximum one, so check those too.
mrDoc.AssertNoInterpretNeeded(
ScAddress(aRefPos.Col(), 0, aRefPos.Tab()), nTrimLen + aRefPos.Row());
#endif
aArray = mrDoc.FetchVectorRefArray(aRefPos, nTrimLen);
}
if (!aArray.isValid())
return false;
formula::SingleVectorRefToken aTok(aArray, nTrimLen);
mrGroupTokens.AddToken(aTok);
rScope.addRefMessage(mrPos, aRefPos, nLen, aArray);
if (nTrimLen && !mxFormulaGroupContext)
{
//tdf#98880 if the SingleVectorRefToken relies on the
//underlying storage provided by the Document
//FormulaGroupContext, take a reference to it here to
//ensure that backing storage exists for our lifetime
mxFormulaGroupContext = mrDoc.GetFormulaGroupContext();
}
}
else
{
// Absolute row reference.
if (isSelfReferenceAbsolute(aRefPos))
return false;
formula::FormulaTokenRef pNewToken = mrDoc.ResolveStaticReference(aRefPos);
if (!pNewToken)
return false;
mrGroupTokens.AddToken(*pNewToken);
rScope.addRefMessage(mrPos, aRefPos, *pNewToken);
}
}
break;
case svDoubleRef:
{
// This code may break in case of implicit intersection, leading to unnecessarily large
// matrix operations and possibly incorrect results (=C:C/D:D). That is handled by
// having ScCompiler check that there are no possible implicit intersections.
// Additionally some functions such as INDEX() and OFFSET() require a reference,
// that is handled by denylisting those opcodes in ScTokenArray::CheckToken().
ScComplexRefData aRef = *p->GetDoubleRef();
if( aRef.IsDeleted())
return false;
ScRange aAbs = aRef.toAbs(mrDoc, mrPos);
// Multiple sheets not handled by vector/matrix.
if (aRef.Ref1.Tab() != aRef.Ref2.Tab())
return false;
// Check for self reference.
if (aRef.Ref1.IsRowRel())
{
if (isSelfReferenceRelative(aAbs.aStart, aRef.Ref1.Row()))
return false;
}
else if (isSelfReferenceAbsolute(aAbs.aStart))
return false;
if (aRef.Ref2.IsRowRel())
{
if (isSelfReferenceRelative(aAbs.aEnd, aRef.Ref2.Row()))
return false;
}
else if (isSelfReferenceAbsolute(aAbs.aEnd))
return false;
// Row reference is relative.
bool bAbsFirst = !aRef.Ref1.IsRowRel();
bool bAbsLast = !aRef.Ref2.IsRowRel();
ScAddress aRefPos = aAbs.aStart;
size_t nCols = aAbs.aEnd.Col() - aAbs.aStart.Col() + 1;
std::vector<formula::VectorRefArray> aArrays;
aArrays.reserve(nCols);
SCROW nRefRowSize = aAbs.aEnd.Row() - aAbs.aStart.Row() + 1;
SCROW nArrayLength = nRefRowSize;
if (!bAbsLast)
{
// range end position is relative. Extend the array length.
SCROW nLastRefRowOffset = aAbs.aEnd.Row() - mrPos.Row();
SCROW nLastRefRow = mrPos.Row() + nLen - 1 + nLastRefRowOffset;
SCROW nNewLength = nLastRefRow - aAbs.aStart.Row() + 1;
if (nNewLength > nArrayLength)
nArrayLength = nNewLength;
}
// Trim trailing empty rows.
SCROW nRequestedLength = nArrayLength; // keep the original length.
nArrayLength = trimLength(aRefPos.Tab(), aAbs.aStart.Col(), aAbs.aEnd.Col(), aRefPos.Row(), nArrayLength);
for (SCCOL i = aAbs.aStart.Col(); i <= aAbs.aEnd.Col(); ++i)
{
aRefPos.SetCol(i);
formula::VectorRefArray aArray;
if (nArrayLength)
{
#ifdef DBG_UTIL
mrDoc.AssertNoInterpretNeeded(
ScAddress(aRefPos.Col(), 0, aRefPos.Tab()), nArrayLength + aRefPos.Row());
#endif
aArray = mrDoc.FetchVectorRefArray(aRefPos, nArrayLength);
}
if (!aArray.isValid())
return false;
aArrays.push_back(aArray);
}
std::vector<formula::VectorRefArray> aArraysTmp = aArrays;
formula::DoubleVectorRefToken aTok( std::move(aArraysTmp), nArrayLength, nRefRowSize, bAbsFirst, bAbsLast );
mrGroupTokens.AddToken(aTok);
rScope.addRefMessage(mrPos, aAbs.aStart, nRequestedLength, aArrays);
if (nArrayLength && !aArrays.empty() && !mxFormulaGroupContext)
{
//tdf#98880 if the DoubleVectorRefToken relies on the
//underlying storage provided by the Document
//FormulaGroupContext, take a reference to it here to
//ensure that backing storage exists for our lifetime
mxFormulaGroupContext = mrDoc.GetFormulaGroupContext();
}
}
break;
case svIndex:
{
if (p->GetOpCode() != ocName)
{
// May be DB-range or TableRef
mrGroupTokens.AddToken(*p);
break;
}
// Named range.
ScRangeName* pNames = mrDoc.GetRangeName();
if (!pNames)
// This should never fail.
return false;
ScRangeData* pRange = pNames->findByIndex(p->GetIndex());
if (!pRange)
// No named range exists by that index.
return false;
ScTokenArray* pNamedTokens = pRange->GetCode();
if (!pNamedTokens)
// This named range is empty.
return false;
mrGroupTokens.AddOpCode(ocOpen);
if (!convert(*pNamedTokens, rScope))
return false;
mrGroupTokens.AddOpCode(ocClose);
}
break;
default:
mrGroupTokens.AddToken(*p);
}
}
return true;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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