98 lines
4.4 KiB
Java
98 lines
4.4 KiB
Java
/* ====================================================================
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Licensed to the Apache Software Foundation (ASF) under one or more
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contributor license agreements. See the NOTICE file distributed with
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this work for additional information regarding copyright ownership.
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The ASF licenses this file to You under the Apache License, Version 2.0
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(the "License"); you may not use this file except in compliance with
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the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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==================================================================== */
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package org.apache.poi.hssf.record.formula;
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import org.apache.poi.ss.SpreadsheetVersion;
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/**
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* Encapsulates logic to convert shared formulaa into non shared equivalent
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*/
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public class SharedFormula {
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private final int _columnWrappingMask;
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private final int _rowWrappingMask;
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public SharedFormula(SpreadsheetVersion ssVersion){
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_columnWrappingMask = ssVersion.getLastColumnIndex(); //"IV" for .xls and "XFD" for .xlsx
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_rowWrappingMask = ssVersion.getLastRowIndex();
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}
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/**
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* Creates a non shared formula from the shared formula counterpart, i.e.
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* Converts the shared formula into the equivalent {@link Ptg} array that it would have,
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* were it not shared.
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*
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* @param ptgs parsed tokens of the shared formula
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* @param formulaRow
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* @param formulaColumn
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*/
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public Ptg[] convertSharedFormulas(Ptg[] ptgs, int formulaRow, int formulaColumn) {
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Ptg[] newPtgStack = new Ptg[ptgs.length];
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for (int k = 0; k < ptgs.length; k++) {
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Ptg ptg = ptgs[k];
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byte originalOperandClass = -1;
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if (!ptg.isBaseToken()) {
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originalOperandClass = ptg.getPtgClass();
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}
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if (ptg instanceof RefPtgBase) {
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RefPtgBase refNPtg = (RefPtgBase)ptg;
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ptg = new RefPtg(fixupRelativeRow(formulaRow,refNPtg.getRow(),refNPtg.isRowRelative()),
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fixupRelativeColumn(formulaColumn,refNPtg.getColumn(),refNPtg.isColRelative()),
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refNPtg.isRowRelative(),
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refNPtg.isColRelative());
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ptg.setClass(originalOperandClass);
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} else if (ptg instanceof AreaPtgBase) {
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AreaPtgBase areaNPtg = (AreaPtgBase)ptg;
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ptg = new AreaPtg(fixupRelativeRow(formulaRow,areaNPtg.getFirstRow(),areaNPtg.isFirstRowRelative()),
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fixupRelativeRow(formulaRow,areaNPtg.getLastRow(),areaNPtg.isLastRowRelative()),
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fixupRelativeColumn(formulaColumn,areaNPtg.getFirstColumn(),areaNPtg.isFirstColRelative()),
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fixupRelativeColumn(formulaColumn,areaNPtg.getLastColumn(),areaNPtg.isLastColRelative()),
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areaNPtg.isFirstRowRelative(),
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areaNPtg.isLastRowRelative(),
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areaNPtg.isFirstColRelative(),
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areaNPtg.isLastColRelative());
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ptg.setClass(originalOperandClass);
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} else if (ptg instanceof OperandPtg) {
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// Any subclass of OperandPtg is mutable, so it's safest to not share these instances.
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ptg = ((OperandPtg) ptg).copy();
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} else {
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// all other Ptgs are immutable and can be shared
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}
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newPtgStack[k] = ptg;
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}
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return newPtgStack;
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}
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private int fixupRelativeColumn(int currentcolumn, int column, boolean relative) {
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if(relative) {
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// mask out upper bits to produce 'wrapping' at the maximum column ("IV" for .xls and "XFD" for .xlsx)
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return (column + currentcolumn) & _columnWrappingMask;
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}
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return column;
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}
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private int fixupRelativeRow(int currentrow, int row, boolean relative) {
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if(relative) {
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return (row+currentrow) & _rowWrappingMask;
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}
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return row;
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}
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}
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