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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/.
*/
#pragma once
#include "formulacell.hxx"
#include "mtvelements.hxx"
#include <vector>
#define USE_FORMULA_GROUP_LISTENER 1
namespace sc {
class StartListeningContext;
class SharedFormulaUtil
{
public:
/**
* Group formula cells stored in the passed container. The formula cells
* in the container are assumed to be all <b>non-shared</b>.
*/
template<typename Iter>
static void groupFormulaCells(const Iter& itBeg, const Iter& itEnd)
{
Iter it = itBeg;
ScFormulaCell* pPrev = *it;
ScFormulaCell* pCur = nullptr;
for (++it; it != itEnd; ++it, pPrev = pCur)
{
pCur = *it;
ScFormulaCell::CompareState eState = pCur->CompareByTokenArray(*pPrev);
if (eState == ScFormulaCell::NotEqual)
continue;
ScFormulaCellGroupRef xGroup = pPrev->GetCellGroup();
if (xGroup)
{
// Extend the group.
++xGroup->mnLength;
pCur->SetCellGroup(xGroup);
continue;
}
// Create a new group.
xGroup = pPrev->CreateCellGroup(2, eState == ScFormulaCell::EqualInvariant);
pCur->SetCellGroup(xGroup);
}
}
/** Get shared formula top cell from position, if any, else nullptr. */
static const ScFormulaCell* getSharedTopFormulaCell(const CellStoreType::position_type& aPos);
/**
* Split existing shared formula range at specified position. The cell at
* specified position becomes the top cell of the lower shared formula
* range after this call. This method does nothing if the cell at
* specified position is not a formula cell.
*
* @param aPos position of cell to examine.
* @param pCxt context to be used, if any, may be nullptr.
*
* @return TRUE if there indeed was a split, else FALSE (e.g. split
* position was top or bottom cell or no formula group).
*/
static bool splitFormulaCellGroup(const CellStoreType::position_type& aPos, sc::EndListeningContext* pCxt);
/**
* Split existing shared formula ranges at specified row positions.
*
* @param rCells cell storage container
* @param rBounds row positions at which to split existing shared formula
* ranges. Note that this method will directly modify this
* parameter to sort and remove duplicates.
*
* @return TRUE if there indeed was a split, else FALSE (e.g. split
* positions were only top or bottom cells or no formula group).
*/
static bool splitFormulaCellGroups(const ScDocument& rDoc, CellStoreType& rCells, std::vector<SCROW>& rBounds);
/**
* See if two specified adjacent formula cells can be merged, and if they
* can, merge them into the same group.
*
* @param rPos position object of the first cell
* @param rCell1 first cell
* @param rCell2 second cell located immediately below the first cell.
*
* @return true if the cells are merged, false otherwise. If the two
* cells already belong to the same group, it returns false.
*/
static bool joinFormulaCells(
const CellStoreType::position_type& rPos, ScFormulaCell& rCell1, ScFormulaCell& rCell2 );
/**
* Merge with an existing formula group (if any) located immediately above
* if the cell at specified position is a formula cell, and its formula
* tokens are identical to that of the above formula group.
*
* @param aPos position of cell to examine.
*
* @return true if the cells are merged, false otherwise. If the two
* cells already belong to the same group, it returns false.
*/
static bool joinFormulaCellAbove( const CellStoreType::position_type& aPos );
/**
* Turn a shared formula cell into a non-shared one, and split it off from
* the adjacent formula cell groups.
*
* @param aPos position of cell to examine
* @param rCell formula cell instance
*/
static void unshareFormulaCell(const CellStoreType::position_type& aPos, ScFormulaCell& rCell);
/**
* Make specified formula cells non-shared ones, and split them off from
* their respective adjacent formula cell groups.
*
* @param rCells cell storage container
* @param rRows row positions at which to unshare formula cells.
*/
static void unshareFormulaCells(const ScDocument& rDoc, CellStoreType& rCells, std::vector<SCROW>& rRows);
/**
* Have all formula cells belonging to a group start listening to their
* references.
*
* @param rCxt context object.
* @param ppSharedTop memory position of the pointer of the topmost
* formula cell instance in the cell storage. The
* caller is responsible for ensuring that it is indeed
* the topmost cell of a shared formula group.
*/
static void startListeningAsGroup( StartListeningContext& rCxt, ScFormulaCell** ppSharedTop );
};
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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