File indexing completed on 2025-03-23 03:32:51

 // xlsxutility.cpp
 
 #include "xlsxutility_p.h"
 #include "xlsxcellreference.h"
 
 #include <QString>
 #include <QPoint>
 #include <QRegularExpression>
 #include <QMap>
 #include <QStringList>
 #include <QColor>
 #include <QDateTime>
 #include <QDebug>
 
 #include <cmath>
 #include <string>
 
 QT_BEGIN_NAMESPACE_XLSX
 
 bool parseXsdBoolean(const QString &value, bool defaultValue)
 {
     if (value == QLatin1String("1") || value == QLatin1String("true"))
         return true;
     if (value == QLatin1String("0") || value == QLatin1String("false"))
         return false;
     return defaultValue;
 }
 
 QStringList splitPath(const QString &path)
 {
     int idx = path.lastIndexOf(QLatin1Char('/'));
     if (idx == -1)
         return { QStringLiteral("."), path };
 
     return { path.left(idx), path.mid(idx+1) };
 }
 
 /*
  * Return the .rel file path based on filePath
  */
 QString getRelFilePath(const QString &filePath)
 {
     QString ret;
 
     int idx = filePath.lastIndexOf(QLatin1Char('/'));
     if (idx == -1) // not found
     {
         // return QString();
 
         // dev34
         ret = QLatin1String("_rels/") + QStringLiteral("%0.rels").arg(filePath);
         return ret;
     }
 
     ret = QString( filePath.left(idx) + QLatin1String("/_rels/") +  filePath.mid(idx+1) + QLatin1String(".rels"));
     return ret;
 }
 
 double datetimeToNumber(const QDateTime &dt, bool is1904)
 {
     //Note, for number 0, Excel2007 shown as 1900-1-0, which should be 1899-12-31
     QDateTime epoch(is1904 ? QDate(1904, 1, 1): QDate(1899, 12, 31), QTime(0,0));
 
     double excel_time = epoch.msecsTo(dt) / (1000*60*60*24.0);
 
     if (dt.isDaylightTime())    // Add one hour if the date is Daylight
         excel_time += 1.0 / 24.0;
 
     if (!is1904 && excel_time > 59) {//31+28
         //Account for Excel erroneously treating 1900 as a leap year.
         excel_time += 1;
     }
 
     return excel_time;
 }
 
 double timeToNumber(const QTime &time)
 {
     return QTime(0,0).msecsTo(time) / (1000*60*60*24.0);
 }
 
 QVariant datetimeFromNumber(double num, bool is1904)
 {
     QDateTime dtRet; // return value
 
     if (!is1904 && num > 60) // for mac os excel
     {
         num = num - 1;
     }
 
     qint64 msecs = static_cast<qint64>(num * 1000*60*60*24.0 + 0.5);
     QDateTime epoch(is1904 ? QDate(1904, 1, 1): QDate(1899, 12, 31), QTime(0,0));
     QDateTime dtOld = epoch.addMSecs(msecs);
     dtRet = dtOld;
 
     // Remove one hour to see whether the date is Daylight
     QDateTime dtNew = dtRet.addMSecs( -3600000 ); // issue102
     if ( dtNew.isDaylightTime() )
     {
         dtRet = dtNew;
     }
 
     double whole = 0;
     double fractional = std::modf(num, &whole);
 
     if ( num < double(1) )
     {
         // only time
         QTime t = dtRet.time();
         return QVariant(t);
     }
 
     if ( fractional == 0.0 )
     {
         // only date
         QDate onlyDT = dtRet.date();
         return QVariant(onlyDT);
     }
 
     return QVariant(dtRet);
 }
 
 /*
   Creates a valid sheet name
     minimum length is 1
     maximum length is 31
     doesn't contain special chars: / \ ? * ] [ :
     Sheet names must not begin or end with ' (apostrophe)
 
   Invalid characters are replaced by one space character ' '.
  */
 QString createSafeSheetName(const QString &nameProposal)
 {
     if (nameProposal.isEmpty())
         return QString();
 
     QString ret = nameProposal;
     if (nameProposal.length() > 2 && nameProposal.startsWith(QLatin1Char('\'')) && nameProposal.endsWith(QLatin1Char('\'')))
         ret = unescapeSheetName(ret);
 
     //Replace invalid chars with space.
     static QRegularExpression invalidChars(QStringLiteral("[/\\\\?*\\][:]"));
     if (nameProposal.contains(invalidChars)) {
         static QRegularExpression validChars(QStringLiteral("[/\\\\?*\\][:]"));
         ret.replace(validChars, QStringLiteral(" "));
     }
 
     if (ret.startsWith(QLatin1Char('\'')))
         ret[0] = QLatin1Char(' ');
 
     if (ret.endsWith(QLatin1Char('\'')))
         ret[ret.size()-1] = QLatin1Char(' ');
 
     if (ret.size() > 31)
         ret = ret.left(31);
     return ret;
 }
 
 /*
  * When sheetName contains space or apostrophe, escaped is needed by cellFormula/definedName/chartSerials.
  */
 QString escapeSheetName(const QString &sheetName)
 {
     //Already escaped.
     Q_ASSERT(!sheetName.startsWith(QLatin1Char('\'')) && !sheetName.endsWith(QLatin1Char('\'')));
 
     //These is no need to escape
     static const auto escape = QRegularExpression(QStringLiteral("[ +\\-,%^=<>'&]"));
     if (!sheetName.contains(escape))
         return sheetName;
 
     //OK, escape is needed.
     QString name = sheetName;
     name.replace(QLatin1Char('\''), QLatin1String("\'\'"));
     return QLatin1Char('\'') + name + QLatin1Char('\'');
 }
 
 /*
  */
 QString unescapeSheetName(const QString &sheetName)
 {
     Q_ASSERT(sheetName.length() > 2 && sheetName.startsWith(QLatin1Char('\'')) && sheetName.endsWith(QLatin1Char('\'')));
 
     QString name = sheetName.mid(1, sheetName.length()-2);
     name.replace(QLatin1String("\'\'"), QLatin1String("\'"));
     return name;
 }
 
 /*
  * whether the string s starts or ends with space
  */
 bool isSpaceReserveNeeded(const QString &s)
 {
     QString spaces(QStringLiteral(" \t\n\r"));
     return !s.isEmpty() && (spaces.contains(s.at(0))||spaces.contains(s.at(s.length()-1)));
 }
 
 /*
  * Convert shared formula for non-root cells.
  *
  * For example, if "B1:B10" have shared formula "=A1*A1", this function will return "=A2*A2"
  * for "B2" cell, "=A3*A3" for "B3" cell, etc.
  *
  * Note, the formula "=A1*A1" for B1 can also be written as "=RC[-1]*RC[-1]", which is the same
  * for all other cells. In other words, this formula is shared.
  *
  * For long run, we need a formula parser.
  */
 QString convertSharedFormula(const QString &rootFormula, const CellReference &rootCell, const CellReference &cell)
 {
     Q_UNUSED(rootCell)
     Q_UNUSED(cell)
     //Find all the "$?[A-Z]+$?[0-9]+" patterns in the rootFormula.
     QVector<std::pair<QString, int> > segments;
 
     QString segment;
     bool inQuote = false;
     enum RefState{INVALID, PRE_AZ, AZ, PRE_09, _09};
     RefState refState = INVALID;
     int refFlag = 0; // 0x00, 0x01, 0x02, 0x03 ==> A1, $A1, A$1, $A$1
     for (QChar ch : rootFormula) {
         if (inQuote) {
             segment.append(ch);
             if (ch == QLatin1Char('"'))
                 inQuote = false;
         } else {
             if (ch == QLatin1Char('"')) {
                 inQuote = true;
                 refState = INVALID;
                 segment.append(ch);
             } else if (ch == QLatin1Char('$')) {
                 if (refState == AZ) {
                     segment.append(ch);
                     refState = PRE_09;
                     refFlag |= 0x02;
                 } else {
                     segments.append(std::make_pair(segment, refState==_09 ? refFlag : -1 ));
                     segment = QString(ch); //Start new segment.
                     refState = PRE_AZ;
                     refFlag = 0x01;
                 }
             } else if (ch >= QLatin1Char('A') && ch <=QLatin1Char('Z')) {
                 if (refState == PRE_AZ || refState == AZ) {
                     segment.append(ch);
                 } else {
                     segments.append(std::make_pair(segment, refState==_09 ? refFlag : -1 ));
                     segment = QString(ch); //Start new segment.
                     refFlag = 0x00;
                 }
                 refState = AZ;
             } else if (ch >= QLatin1Char('0') && ch <=QLatin1Char('9')) {
                 segment.append(ch);
 
                 if (refState == AZ || refState == PRE_09 || refState == _09)
                     refState = _09;
                 else
                     refState = INVALID;
             } else {
                 if (refState == _09) {
                     segments.append(std::make_pair(segment, refFlag ));
                     segment = QString(ch); //Start new segment.
                 } else {
                     segment.append(ch);
                 }
                 refState = INVALID;
             }
         }
     }
 
     if (!segment.isEmpty())
         segments.append(std::make_pair(segment, refState==_09 ? refFlag : -1 ));
 
     //Replace "A1", "$A1", "A$1" segment with proper one.
     QStringList result;
     for (const auto &p : segments) {
         //qDebug()<<p.first<<p.second;
         if (p.second != -1 && p.second != 3) {
             CellReference oldRef(p.first);
             int row = p.second & 0x02 ? oldRef.row() : oldRef.row()-rootCell.row()+cell.row();
             int col = p.second & 0x01 ? oldRef.column() : oldRef.column()-rootCell.column()+cell.column();
             result.append(CellReference(row, col).toString(p.second & 0x02, p.second & 0x01));
         } else {
             result.append(p.first);
         }
     }
 
     //OK
     return result.join(QString());
 }
 
 QT_END_NAMESPACE_XLSX