/****************************************************************************
** Copyright (c) 2013-2014 Debao Zhang <hello@debao.me>
** All right reserved.
**
** Permission is hereby granted, free of charge, to any person obtaining
** a copy of this software and associated documentation files (the
** "Software"), to deal in the Software without restriction, including
** without limitation the rights to use, copy, modify, merge, publish,
** distribute, sublicense, and/or sell copies of the Software, and to
** permit persons to whom the Software is furnished to do so, subject to
** the following conditions:
**
** The above copyright notice and this permission notice shall be
** included in all copies or substantial portions of the Software.
**
** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
** NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
** LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
** OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
** WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
**
****************************************************************************/
#include "xlsxrichstring.h"
#include "xlsxworksheet.h"
#include "xlsxworksheet_p.h"
#include "xlsxworkbook.h"
#include "xlsxformat.h"
#include "xlsxformat_p.h"
#include "xlsxutility_p.h"
#include "xlsxsharedstrings_p.h"
#include "xlsxdrawing_p.h"
#include "xlsxstyles_p.h"
#include "xlsxcell.h"
#include "xlsxcell_p.h"
#include "xlsxcellrange.h"
#include "xlsxconditionalformatting_p.h"
#include "xlsxdrawinganchor_p.h"
#include "xlsxchart.h"

#include <QVariant>
#include <QDateTime>
#include <QPoint>
#include <QFile>
#include <QUrl>
#include <QRegularExpression>
#include <QDebug>
#include <QBuffer>
#include <QXmlStreamWriter>
#include <QXmlStreamReader>
#include <QTextDocument>
#include <QDir>

#include <math.h>

QT_BEGIN_NAMESPACE_XLSX

WorksheetPrivate::WorksheetPrivate(Worksheet *p)
    : OOXmlFilePrivate(p)
  , windowProtection(false), showFormulas(false), showGridLines(true), showRowColHeaders(true)
  , showZeros(true), rightToLeft(false), tabSelected(false), showRuler(false)
  , showOutlineSymbols(true), showWhiteSpace(true)
{
    previous_row = 0;

    outline_row_level = 0;
    outline_col_level = 0;

    default_row_height = 15;
    default_row_zeroed = false;

    hidden = false;
}

WorksheetPrivate::~WorksheetPrivate()
{
}

/*
  Calculate the "spans" attribute of the <row> tag. This is an
  XLSX optimisation and isn't strictly required. However, it
  makes comparing files easier. The span is the same for each
  block of 16 rows.
 */
void WorksheetPrivate::calculateSpans() const
{
    row_spans.clear();
    int span_min = XLSX_COLUMN_MAX+1;
    int span_max = -1;

    for (int row_num = dimension.firstRow(); row_num <= dimension.lastRow(); row_num++) {
        if (cellTable.contains(row_num)) {
            for (int col_num = dimension.firstColumn(); col_num <= dimension.lastColumn(); col_num++) {
                if (cellTable[row_num].contains(col_num)) {
                    if (span_max == -1) {
                        span_min = col_num;
                        span_max = col_num;
                    } else {
                        if (col_num < span_min)
                            span_min = col_num;
                        else if (col_num > span_max)
                            span_max = col_num;
                    }
                }
            }
        }
        if (comments.contains(row_num)) {
            for (int col_num = dimension.firstColumn(); col_num <= dimension.lastColumn(); col_num++) {
                if (comments[row_num].contains(col_num)) {
                    if (span_max == -1) {
                        span_min = col_num;
                        span_max = col_num;
                    } else {
                        if (col_num < span_min)
                            span_min = col_num;
                        else if (col_num > span_max)
                            span_max = col_num;
                    }
                }
            }
        }

        if (row_num%16 == 0 || row_num == dimension.lastRow()) {
            if (span_max != -1) {
                row_spans[row_num / 16] = QStringLiteral("%1:%2").arg(span_min).arg(span_max);
                span_min = XLSX_COLUMN_MAX+1;
                span_max = -1;
            }
        }
    }
}


QString WorksheetPrivate::generateDimensionString() const
{
    if (!dimension.isValid())
        return QStringLiteral("A1");
    else
        return dimension.toString();
}

/*
  Check that row and col are valid and store the max and min
  values for use in other methods/elements. The ignore_row /
  ignore_col flags is used to indicate that we wish to perform
  the dimension check without storing the value. The ignore
  flags are use by setRow() and dataValidate.
*/
int WorksheetPrivate::checkDimensions(int row, int col, bool ignore_row, bool ignore_col)
{
    if (row >= XLSX_ROW_MAX || col >= XLSX_COLUMN_MAX)
        return -1;

    if (!ignore_row) {
        if (row < dimension.firstRow() || dimension.firstRow() == -1) dimension.setFirstRow(row);
        if (row > dimension.lastRow()) dimension.setLastRow(row);
    }
    if (!ignore_col) {
        if (col < dimension.firstColumn() || dimension.firstColumn() == -1) dimension.setFirstColumn(col);
        if (col > dimension.lastColumn()) dimension.setLastColumn(col);
    }

    return 0;
}

/*!
  \class Worksheet
  \inmodule QtXlsx
  \brief Represent one worksheet in the workbook.
*/

/*!
 * \internal
 */
Worksheet::Worksheet(const QString &name, int id, Workbook *workbook) :
    OOXmlFile(new WorksheetPrivate(this))
{
    d_func()->name = name;
    d_func()->id = id;
    if (!workbook) //For unit test propose only. Ignore the memery leak.
        workbook = new Workbook;
    d_func()->workbook = workbook;
}

/*!
 * \internal
 *
 * Make a copy of this sheet.
 */

QSharedPointer<Worksheet> Worksheet::copy(const QString &distName, int distId) const
{
    Q_D(const Worksheet);
    QSharedPointer<Worksheet> sheet(new Worksheet(distName, distId, d->workbook));

    WorksheetPrivate *sheet_d = sheet->d_func();

    sheet_d->dimension = d->dimension;

    QMapIterator<int, QMap<int, QSharedPointer<Cell> > > it(d->cellTable);
    while (it.hasNext()) {
        it.next();
        int row = it.key();
        QMapIterator<int, QSharedPointer<Cell> > it2(it.value());
        while (it2.hasNext()) {
            it2.next();
            int col = it2.key();

            QSharedPointer<Cell> cell(new Cell(it2.value().data()));
            cell->d_ptr->parent = sheet.data();

            if (cell->dataType() == Cell::String)
                d->workbook->sharedStrings()->addSharedString(cell->d_ptr->richString);

            sheet_d->cellTable[row][col] = cell;
        }
    }

    sheet_d->merges = d->merges;
//    sheet_d->rowsInfo = d->rowsInfo;
//    sheet_d->colsInfo = d->colsInfo;
//    sheet_d->colsInfoHelper = d->colsInfoHelper;
//    sheet_d->dataValidationsList = d->dataValidationsList;
//    sheet_d->conditionalFormattingList = d->conditionalFormattingList;

    return sheet;
}

/*!
 * Destroys this workssheet.
 */
Worksheet::~Worksheet()
{
}

/*!
 * \internal
 */
bool Worksheet::isChartsheet() const
{
    return false;
}

/*!
 * Returns the name of the sheet.
 */
QString Worksheet::sheetName() const
{
    Q_D(const Worksheet);
    return d->name;
}

/*!
 * \internal
 */
void Worksheet::setSheetName(const QString &sheetName)
{
    Q_D(Worksheet);
    d->name = sheetName;
}

/*!
 * \internal
 */
Relationships &Worksheet::relationships()
{
    Q_D(Worksheet);
    return d->relationships;
}

/*!
 * \internal
 */
bool Worksheet::isHidden() const
{
    Q_D(const Worksheet);
    return d->hidden;
}

/*!
 * \internal
 */
void Worksheet::setHidden(bool hidden)
{
    Q_D(Worksheet);
    d->hidden = hidden;
}

/*!
 * \internal
 */
int Worksheet::sheetId() const
{
    Q_D(const Worksheet);
    return d->id;
}

/*!
 * Returns whether sheet is protected.
 */
bool Worksheet::isWindowProtected() const
{
    Q_D(const Worksheet);
    return d->windowProtection;
}

/*!
 * Protects/unprotects the sheet based on \a protect.
 */
void Worksheet::setWindowProtected(bool protect)
{
    Q_D(Worksheet);
    d->windowProtection = protect;
}

/*!
 * Return whether formulas instead of their calculated results shown in cells
 */
bool Worksheet::isFormulasVisible() const
{
    Q_D(const Worksheet);
    return d->showFormulas;
}

/*!
 * Show formulas in cells instead of their calculated results when \a visible is true.
 */
void Worksheet::setFormulasVisible(bool visible)
{
    Q_D(Worksheet);
    d->showFormulas = visible;
}

/*!
 * Return whether gridlines is shown or not.
 */
bool Worksheet::isGridLinesVisible() const
{
    Q_D(const Worksheet);
    return d->showGridLines;
}

/*!
 * Show or hide the gridline based on \a visible
 */
void Worksheet::setGridLinesVisible(bool visible)
{
    Q_D(Worksheet);
    d->showGridLines = visible;
}

/*!
 * Return whether is row and column headers is vislbe.
 */
bool Worksheet::isRowColumnHeadersVisible() const
{
    Q_D(const Worksheet);
    return d->showRowColHeaders;
}

/*!
 * Show or hide the row column headers based on \a visible
 */
void Worksheet::setRowColumnHeadersVisible(bool visible)
{
    Q_D(Worksheet);
    d->showRowColHeaders = visible;
}


/*!
 * Return whether the sheet is shown right-to-left or not.
 */
bool Worksheet::isRightToLeft() const
{
    Q_D(const Worksheet);
    return d->rightToLeft;
}

/*!
 * Enable or disable the right-to-left based on \a enable.
 */
void Worksheet::setRightToLeft(bool enable)
{
    Q_D(Worksheet);
    d->rightToLeft = enable;
}

/*!
 * Return whether is cells that have zero value show a zero.
 */
bool Worksheet::isZerosVisible() const
{
    Q_D(const Worksheet);
    return d->showZeros;
}

/*!
 * Show a zero in cells that have zero value if \a visible is true.
 */
void Worksheet::setZerosVisible(bool visible)
{
    Q_D(Worksheet);
    d->showZeros = visible;
}

/*!
 * Return whether this tab is selected.
 */
bool Worksheet::isSelected() const
{
    Q_D(const Worksheet);
    return d->tabSelected;
}

/*!
 * Select this sheet if \a select is true.
 */
void Worksheet::setSelected(bool select)
{
    Q_D(Worksheet);
    d->tabSelected = select;
}

/*!
 * Return whether is ruler is shown.
 */
bool Worksheet::isRulerVisible() const
{
    Q_D(const Worksheet);
    return d->showRuler;

}

/*!
 * Show or hide the ruler based on \a visible.
 */
void Worksheet::setRulerVisible(bool visible)
{
    Q_D(Worksheet);
    d->showRuler = visible;

}

/*!
 * Return whether is outline symbols is shown.
 */
bool Worksheet::isOutlineSymbolsVisible() const
{
    Q_D(const Worksheet);
    return d->showOutlineSymbols;
}

/*!
 * Show or hide the outline symbols based ib \a visible.
 */
void Worksheet::setOutlineSymbolsVisible(bool visible)
{
    Q_D(Worksheet);
    d->showOutlineSymbols = visible;
}

/*!
 * Return whether is white space is shown.
 */
bool Worksheet::isWhiteSpaceVisible() const
{
    Q_D(const Worksheet);
    return d->showWhiteSpace;
}

/*!
 * Show or hide the white space based on \a visible.
 */
void Worksheet::setWhiteSpaceVisible(bool visible)
{
    Q_D(Worksheet);
    d->showWhiteSpace = visible;
}

/*!
 * Write \a value to cell (\a row, \a column) with the \a format.
 * Both \a row and \a column are all 1-indexed value.
 */
int Worksheet::write(int row, int column, const QVariant &value, const Format &format)
{
    Q_D(Worksheet);
    int ret = 0;

    if (d->checkDimensions(row, column))
        return -1;

    if (value.isNull()) {
        //Blank
        ret = writeBlank(row, column, format);
    } else if (value.userType() == qMetaTypeId<RichString>()) {
        ret = writeString(row, column, value.value<RichString>(), format);
    } else if (value.userType() == QMetaType::Bool) {
        //Bool
        ret = writeBool(row,column, value.toBool(), format);
    } else if (value.userType() == QMetaType::QDateTime || value.userType() == QMetaType::QDate) {
        //DateTime, Date
        //  note that, QTime cann't convert to QDateTime
        ret = writeDateTime(row, column, value.toDateTime(), format);
    } else if (value.userType() == QMetaType::QTime) {
        //Time
        ret = writeTime(row, column, value.toTime(), format);
    } else if (value.userType() == QMetaType::Int || value.userType() == QMetaType::UInt
               || value.userType() == QMetaType::LongLong || value.userType() == QMetaType::ULongLong
               || value.userType() == QMetaType::Double || value.userType() == QMetaType::Float) {
        //Number

        ret = writeNumeric(row, column, value.toDouble(), format);
    } else if (value.userType() == QMetaType::QUrl) {
        //Url
        ret = writeHyperlink(row, column, value.toUrl(), format);
    } else if (value.userType() == QMetaType::QString) {
        //String
        QString token = value.toString();
        bool ok;
        QRegularExpression urlPattern(QStringLiteral("^([fh]tt?ps?://)|(mailto:)|(file://)"));

        if (token.startsWith(QLatin1String("="))) {
            //convert to formula
            ret = writeFormula(row, column, token, format);
        } else if (token.startsWith(QLatin1String("{=")) && token.endsWith(QLatin1Char('}'))) {
            //convert to array formula
            ret = writeArrayFormula(CellRange(row, column, row, column), token, format);
        } else if (token.contains(urlPattern)) {
            //convert to url
            ret = writeHyperlink(row, column, QUrl(token));
        } else if (d->workbook->isStringsToNumbersEnabled() && (value.toDouble(&ok), ok)) {
            //Try convert string to number if the flag enabled.
            ret = writeString(row, column, value.toString(), format);
        } else {
            //normal string now
            ret = writeString(row, column, token, format);
        }
    } else {
        //Wrong type
        return -1;
    }

    return ret;
}

/*!
 * \overload
 * Write \a value to cell \a row_column with the \a format.
 * Both row and column are all 1-indexed value.
 */
int Worksheet::write(const QString &row_column, const QVariant &value, const Format &format)
{
    //convert the "A1" notation to row/column notation
    QPoint pos = xl_cell_to_rowcol(row_column);
    if (pos == QPoint(-1, -1))
        return -1;

    return write(pos.x(), pos.y(), value, format);
}

/*!
    \overload
    Return the contents of the cell \a row_column.
 */
QVariant Worksheet::read(const QString &row_column) const
{
    //convert the "A1" notation to row/column notation
    QPoint pos = xl_cell_to_rowcol(row_column);
    if (pos == QPoint(-1, -1))
        return QVariant();

    return read(pos.x(), pos.y());
}

/*!
    Return the contents of the cell (\a row, \a column).
 */
QVariant Worksheet::read(int row, int column) const
{
    Cell *cell = cellAt(row, column);
    if (!cell)
        return QVariant();
    if (!cell->formula().isEmpty())
        return QVariant(QLatin1String("=")+cell->formula());
    if (cell->isDateTime()) {
        double val = cell->value().toDouble();
        QDateTime dt = cell->dateTime();
        if (val < 1)
            return dt.time();
        if (fmod(val, 1.0) <  1.0/(1000*60*60*24)) //integer
            return dt.date();
        return dt;
    }
    return cell->value();
}

/*!
 * \overload
 * Returns the cell at the position \a row_column.
 * 0 will be returned if the cell doesn't exist.
 */
Cell *Worksheet::cellAt(const QString &row_column) const
{
    QPoint pos = xl_cell_to_rowcol(row_column);
    if (pos == QPoint(-1, -1))
        return 0;

    return cellAt(pos.x(), pos.y());
}

/*!
 * Returns the cell at the position (\a row \a column).
 * 0 will be returned if the cell doesn't exist.
 */
Cell *Worksheet::cellAt(int row, int column) const
{
    Q_D(const Worksheet);
    if (!d->cellTable.contains(row))
        return 0;
    if (!d->cellTable[row].contains(column))
        return 0;

    return d->cellTable[row][column].data();
}

Format WorksheetPrivate::cellFormat(int row, int col) const
{
    if (!cellTable.contains(row))
        return Format();
    if (!cellTable[row].contains(col))
        return Format();
    return cellTable[row][col]->format();
}

/*!
    \overload
    Write string \a value to the cell \a row_column with the \a format
 */
int Worksheet::writeString(const QString &row_column, const RichString &value, const Format &format)
{
    //convert the "A1" notation to row/column notation
    QPoint pos = xl_cell_to_rowcol(row_column);
    if (pos == QPoint(-1, -1))
        return -1;

    return writeString(pos.x(), pos.y(), value, format);
}

/*!
    Write string \a value to the cell (\a row, \a column) with the \a format
*/
int Worksheet::writeString(int row, int column, const RichString &value, const Format &format)
{
    Q_D(Worksheet);
    int error = 0;
//    QString content = value.toPlainString();
    if (d->checkDimensions(row, column))
        return -1;

//    if (content.size() > d->xls_strmax) {
//        content = content.left(d->xls_strmax);
//        error = -2;
//    }

    d->sharedStrings()->addSharedString(value);
    Format fmt = format.isValid() ? format : d->cellFormat(row, column);
    if (value.fragmentCount() == 1 && value.fragmentFormat(0).isValid())
        fmt.mergeFormat(value.fragmentFormat(0));
    d->workbook->styles()->addXfFormat(fmt);
    QSharedPointer<Cell> cell = QSharedPointer<Cell>(new Cell(value.toPlainString(), Cell::String, fmt, this));
    cell->d_ptr->richString = value;
    d->cellTable[row][column] = cell;
    return error;
}

/*!
    \overload
    Write string \a value to the cell \a row_column with the \a format
 */
int Worksheet::writeString(const QString &row_column, const QString &value, const Format &format)
{
    //convert the "A1" notation to row/column notation
    QPoint pos = xl_cell_to_rowcol(row_column);
    if (pos == QPoint(-1, -1))
        return -1;

    return writeString(pos.x(), pos.y(), value, format);
}

/*!
    \overload

    Write string \a value to the cell (\a row, \a column) with the \a format
*/
int Worksheet::writeString(int row, int column, const QString &value, const Format &format)
{
    Q_D(Worksheet);
    if (d->checkDimensions(row, column))
        return -1;

    RichString rs;
    if (Qt::mightBeRichText(value) && d->workbook->isHtmlToRichStringEnabled())
        rs.setHtml(value);
    else
        rs.addFragment(value, Format());

    return writeString(row, column, rs, format);
}

/*!
    \overload
    Write string \a value to the cell \a row_column with the \a format
 */
int Worksheet::writeInlineString(const QString &row_column, const QString &value, const Format &format)
{
    //convert the "A1" notation to row/column notation
    QPoint pos = xl_cell_to_rowcol(row_column);
    if (pos == QPoint(-1, -1))
        return -1;

    return writeInlineString(pos.x(), pos.y(), value, format);
}

/*!
    Write string \a value to the cell (\a row, \a column) with the \a format
*/
int Worksheet::writeInlineString(int row, int column, const QString &value, const Format &format)
{
    Q_D(Worksheet);
    int error = 0;
    QString content = value;
    if (d->checkDimensions(row, column))
        return -1;

    if (value.size() > XLSX_STRING_MAX) {
        content = value.left(XLSX_STRING_MAX);
        error = -2;
    }

    Format fmt = format.isValid() ? format : d->cellFormat(row, column);
    d->workbook->styles()->addXfFormat(fmt);
    d->cellTable[row][column] = QSharedPointer<Cell>(new Cell(value, Cell::InlineString, fmt, this));
    return error;
}

/*!
    \overload
    Write numeric \a value to the cell \a row_column with the \a format
 */
int Worksheet::writeNumeric(const QString &row_column, double value, const Format &format)
{
    //convert the "A1" notation to row/column notation
    QPoint pos = xl_cell_to_rowcol(row_column);
    if (pos == QPoint(-1, -1))
        return -1;

    return writeNumeric(pos.x(), pos.y(), value, format);
}

/*!
    Write numeric \a value to the cell (\a row, \a column) with the \a format
*/
int Worksheet::writeNumeric(int row, int column, double value, const Format &format)
{
    Q_D(Worksheet);
    if (d->checkDimensions(row, column))
        return -1;

    Format fmt = format.isValid() ? format : d->cellFormat(row, column);
    d->workbook->styles()->addXfFormat(fmt);
    d->cellTable[row][column] = QSharedPointer<Cell>(new Cell(value, Cell::Numeric, fmt, this));
    return 0;
}

/*!
    \overload
    Write \a formula to the cell \a row_column with the \a format and \a result.
 */
int Worksheet::writeFormula(const QString &row_column, const QString &formula, const Format &format, double result)
{
    //convert the "A1" notation to row/column notation
    QPoint pos = xl_cell_to_rowcol(row_column);
    if (pos == QPoint(-1, -1))
        return -1;

    return writeFormula(pos.x(), pos.y(), formula, format, result);
}

/*!
    Write \a formula to the cell (\a row, \a column) with the \a format and \a result.
*/
int Worksheet::writeFormula(int row, int column, const QString &formula, const Format &format, double result)
{
    Q_D(Worksheet);
    int error = 0;
    QString _formula = formula;
    if (d->checkDimensions(row, column))
        return -1;

    //Remove the formula '=' sign if exists
    if (_formula.startsWith(QLatin1String("=")))
        _formula.remove(0,1);

    Format fmt = format.isValid() ? format : d->cellFormat(row, column);
    d->workbook->styles()->addXfFormat(fmt);
    Cell *data = new Cell(result, Cell::Formula, fmt, this);
    data->d_ptr->formula = _formula;
    d->cellTable[row][column] = QSharedPointer<Cell>(data);

    return error;
}

/*!
    Write \a formula to the \a range with the \a format
*/
int Worksheet::writeArrayFormula(const CellRange &range, const QString &formula, const Format &format)
{
    Q_D(Worksheet);
    int error = 0;

    if (d->checkDimensions(range.firstRow(), range.firstColumn()))
        return -1;
    if (d->checkDimensions(range.lastRow(), range.lastColumn()))
        return -1;
    QString _formula = formula;
    //Remove the formula "{=" and "}" sign if exists
    if (_formula.startsWith(QLatin1String("{=")))
        _formula.remove(0,2);
    if (_formula.endsWith(QLatin1Char('}')))
        _formula.chop(1);

    for (int row=range.firstRow(); row<=range.lastRow(); ++row) {
        for (int column=range.firstColumn(); column<=range.lastColumn(); ++column) {
            Format _format = format.isValid() ? format : d->cellFormat(row, column);
            d->workbook->styles()->addXfFormat(_format);
            if (row == range.firstRow() && column == range.firstColumn()) {
                QSharedPointer<Cell> data(new Cell(0, Cell::ArrayFormula, _format, this));
                data->d_ptr->formula = _formula;
                data->d_ptr->range = range;
                d->cellTable[row][column] = data;
            } else {
                d->cellTable[row][column] = QSharedPointer<Cell>(new Cell(0, Cell::Numeric, _format, this));
            }
        }
    }

    return error;
}

/*!
    \overload
    Write \a formula to the \a range with the \a format
 */
int Worksheet::writeArrayFormula(const QString &range, const QString &formula, const Format &format)
{
    return writeArrayFormula(CellRange(range), formula, format);
}

/*!
    \overload
    Write a empty cell \a row_column with the \a format
 */
int Worksheet::writeBlank(const QString &row_column, const Format &format)
{
    //convert the "A1" notation to row/column notation
    QPoint pos = xl_cell_to_rowcol(row_column);
    if (pos == QPoint(-1, -1))
        return -1;

    return writeBlank(pos.x(), pos.y(), format);
}

/*!
    Write a empty cell (\a row, \a column) with the \a format
 */
int Worksheet::writeBlank(int row, int column, const Format &format)
{
    Q_D(Worksheet);
    if (d->checkDimensions(row, column))
        return -1;

    Format fmt = format.isValid() ? format : d->cellFormat(row, column);
    d->workbook->styles()->addXfFormat(fmt);

    d->cellTable[row][column] = QSharedPointer<Cell>(new Cell(QVariant(), Cell::Blank, fmt, this));

    return 0;
}
/*!
    \overload
    Write a bool \a value to the cell \a row_column with the \a format
 */
int Worksheet::writeBool(const QString &row_column, bool value, const Format &format)
{
    //convert the "A1" notation to row/column notation
    QPoint pos = xl_cell_to_rowcol(row_column);
    if (pos == QPoint(-1, -1))
        return -1;

    return writeBool(pos.x(), pos.y(), value, format);
}

/*!
    Write a bool \a value to the cell (\a row, \a column) with the \a format
 */
int Worksheet::writeBool(int row, int column, bool value, const Format &format)
{
    Q_D(Worksheet);
    if (d->checkDimensions(row, column))
        return -1;

    Format fmt = format.isValid() ? format : d->cellFormat(row, column);
    d->workbook->styles()->addXfFormat(fmt);
    d->cellTable[row][column] = QSharedPointer<Cell>(new Cell(value, Cell::Boolean, fmt, this));

    return 0;
}
/*!
    \overload
    Write a QDateTime \a dt to the cell \a row_column with the \a format
 */
int Worksheet::writeDateTime(const QString &row_column, const QDateTime &dt, const Format &format)
{
    //convert the "A1" notation to row/column notation
    QPoint pos = xl_cell_to_rowcol(row_column);
    if (pos == QPoint(-1, -1))
        return -1;

    return writeDateTime(pos.x(), pos.y(), dt, format);
}

/*!
    Write a QDateTime \a dt to the cell (\a row, \a column) with the \a format
 */
int Worksheet::writeDateTime(int row, int column, const QDateTime &dt, const Format &format)
{
    Q_D(Worksheet);
    if (d->checkDimensions(row, column))
        return -1;

    Format fmt = format.isValid() ? format : d->cellFormat(row, column);
    if (!fmt.isValid() || !fmt.isDateTimeFormat())
        fmt.setNumberFormat(d->workbook->defaultDateFormat());
    d->workbook->styles()->addXfFormat(fmt);

    double value = datetimeToNumber(dt, d->workbook->isDate1904());

    d->cellTable[row][column] = QSharedPointer<Cell>(new Cell(value, Cell::Numeric, fmt, this));

    return 0;
}

/*!
    \overload
    Write a QTime \a t to the cell \a row_column with the \a format
 */
int Worksheet::writeTime(const QString &row_column, const QTime &t, const Format &format)
{
    //convert the "A1" notation to row/column notation
    QPoint pos = xl_cell_to_rowcol(row_column);
    if (pos == QPoint(-1, -1))
        return -1;

    return writeTime(pos.x(), pos.y(), t, format);
}

/*!
    Write a QTime \a t to the cell (\a row, \a column) with the \a format
 */
int Worksheet::writeTime(int row, int column, const QTime &t, const Format &format)
{
    Q_D(Worksheet);
    if (d->checkDimensions(row, column))
        return -1;

    Format fmt = format.isValid() ? format : d->cellFormat(row, column);
    if (!fmt.isValid() || !fmt.isDateTimeFormat())
        fmt.setNumberFormat(QStringLiteral("hh:mm:ss"));
    d->workbook->styles()->addXfFormat(fmt);

    d->cellTable[row][column] = QSharedPointer<Cell>(new Cell(timeToNumber(t), Cell::Numeric, fmt, this));

    return 0;
}

/*!
    \overload
    Write a QUrl \a url to the cell \a row_column with the given \a format \a display and \a tip
 */
int Worksheet::writeHyperlink(const QString &row_column, const QUrl &url, const Format &format, const QString &display, const QString &tip)
{
    //convert the "A1" notation to row/column notation
    QPoint pos = xl_cell_to_rowcol(row_column);
    if (pos == QPoint(-1, -1))
        return -1;

    return writeHyperlink(pos.x(), pos.y(), url, format, display, tip);
}

/*!
    Write a QUrl \a url to the cell (\a row, \a column) with the given \a format \a display and \a tip.
 */
int Worksheet::writeHyperlink(int row, int column, const QUrl &url, const Format &format, const QString &display, const QString &tip)
{
    Q_D(Worksheet);
    if (d->checkDimensions(row, column))
        return -1;

    int error = 0;

    QString urlString = url.toString();

    //Generate proper display string
    QString displayString = display.isEmpty() ? urlString : display;
    if (displayString.startsWith(QLatin1String("mailto:")))
        displayString.replace(QLatin1String("mailto:"), QString());
    if (displayString.size() > XLSX_STRING_MAX) {
        displayString = displayString.left(XLSX_STRING_MAX);
        error = -2;
    }

    /*
      Location within target. If target is a workbook (or this workbook)
      this shall refer to a sheet and cell or a defined name. Can also
      be an HTML anchor if target is HTML file.

      c:\temp\file.xlsx#Sheet!A1
      http://a.com/aaa.html#aaaaa
    */
    QString locationString;
    if (url.hasFragment()) {
        locationString = url.fragment();
        urlString = url.toString(QUrl::RemoveFragment);
    }

    Format fmt = format.isValid() ? format : d->cellFormat(row, column);
    //Given a default style for hyperlink
    if (!fmt.isValid()) {
        fmt.setFontColor(Qt::blue);
        fmt.setFontUnderline(Format::FontUnderlineSingle);
    }
    d->workbook->styles()->addXfFormat(fmt);

    //Write the hyperlink string as normal string.
    d->sharedStrings()->addSharedString(displayString);
    d->cellTable[row][column] = QSharedPointer<Cell>(new Cell(displayString, Cell::String, fmt, this));

    //Store the hyperlink data in a separate table
    d->urlTable[row][column] = QSharedPointer<XlsxHyperlinkData>(new XlsxHyperlinkData(XlsxHyperlinkData::External, urlString, locationString, QString(), tip));

    return error;
}

/*!
 * Add one DataValidation \a validation to the sheet.
 * Return true if it's successful.
 */
bool Worksheet::addDataValidation(const DataValidation &validation)
{
    Q_D(Worksheet);
    if (validation.ranges().isEmpty() || validation.validationType()==DataValidation::None)
        return false;

    d->dataValidationsList.append(validation);
    return true;
}

/*!
 * Add one ConditionalFormatting \a cf to the sheet.
 * Return true if it's successful.
 */
bool Worksheet::addConditionalFormatting(const ConditionalFormatting &cf)
{
    Q_D(Worksheet);
    if (cf.ranges().isEmpty())
        return false;

    for (int i=0; i<cf.d->cfRules.size(); ++i) {
        const QSharedPointer<XlsxCfRuleData> &rule = cf.d->cfRules[i];
        if (!rule->dxfFormat.isEmpty())
            d->workbook->styles()->addDxfFormat(rule->dxfFormat);
        rule->priority = 1;
    }
    d->conditionalFormattingList.append(cf);
    return true;
}

bool Worksheet::insertImage(int row, int column, const QImage &image)
{
    Q_D(Worksheet);

    if (image.isNull())
        return false;

    if (!d->drawing)
        d->drawing = QSharedPointer<Drawing>(new Drawing(this));

    DrawingOneCellAnchor *anchor = new DrawingOneCellAnchor(d->drawing.data(), DrawingAnchor::Picture);

    /*
        The size are expressed as English Metric Units (EMUs). There are
        12,700 EMUs per point. Therefore, 12,700 * 3 /4 = 9,525 EMUs per
        pixel
    */
    anchor->from = XlsxMarker(row, column, 0, 0);
    anchor->ext = QSize(image.width() * 9525, image.height() * 9525);

    anchor->setObjectPicture(image);
    return true;
}

int Worksheet::insertImage(int row, int column, const QImage &image, const QPointF & /*offset*/, double /*xScale*/, double /*yScale*/)
{
    return insertImage(row, column, image);
}

Chart *Worksheet::insertChart(int row, int column, const QSize &size)
{
    Q_D(Worksheet);

    if (!d->drawing)
        d->drawing = QSharedPointer<Drawing>(new Drawing(this));

    DrawingOneCellAnchor *anchor = new DrawingOneCellAnchor(d->drawing.data(), DrawingAnchor::Picture);

    /*
        The size are expressed as English Metric Units (EMUs). There are
        12,700 EMUs per point. Therefore, 12,700 * 3 /4 = 9,525 EMUs per
        pixel
    */
    anchor->from = XlsxMarker(row, column, 0, 0);
    anchor->ext = size * 9525;

    QSharedPointer<Chart> chart = QSharedPointer<Chart>(new Chart(this));
    anchor->setObjectGraphicFrame(chart);

    return chart.data();
}

/*!
    Merge a \a range of cells. The first cell should contain the data and the others should
    be blank. All cells will be applied the same style if a valid \a format is given.

    \note All cells except the top-left one will be cleared.
 */
int Worksheet::mergeCells(const CellRange &range, const Format &format)
{
    Q_D(Worksheet);
    if (range.rowCount() < 2 && range.columnCount() < 2)
        return -1;

    if (d->checkDimensions(range.firstRow(), range.firstColumn()))
        return -1;

    if (format.isValid())
        d->workbook->styles()->addXfFormat(format);

    for (int row = range.firstRow(); row <= range.lastRow(); ++row) {
        for (int col = range.firstColumn(); col <= range.lastColumn(); ++col) {
            if (row == range.firstRow() && col == range.firstColumn()) {
                Cell *cell = cellAt(row, col);
                if (cell) {
                    if (format.isValid())
                        cell->d_ptr->format = format;
                } else {
                    writeBlank(row, col, format);
                }
            } else {
                writeBlank(row, col, format);
            }
        }
    }

    d->merges.append(range);
    return 0;
}

/*!
    \overload
    Merge a \a range of cells. The first cell should contain the data and the others should
    be blank. All cells will be applied the same style if a valid \a format is given.

    \note All cells except the top-left one will be cleared.
 */
int Worksheet::mergeCells(const QString &range, const Format &format)
{
    QStringList cells = range.split(QLatin1Char(':'));
    if (cells.size() != 2)
        return -1;
    QPoint cell1 = xl_cell_to_rowcol(cells[0]);
    QPoint cell2 = xl_cell_to_rowcol(cells[1]);

    if (cell1 == QPoint(-1,-1) || cell2 == QPoint(-1, -1))
        return -1;

    return mergeCells(CellRange(cell1.x(), cell1.y(), cell2.x(), cell2.y()), format);
}

/*!
    Unmerge the cells in the \a range.
*/
int Worksheet::unmergeCells(const CellRange &range)
{
    Q_D(Worksheet);
    if (!d->merges.contains(range))
        return -1;

    d->merges.removeOne(range);
    return 0;
}

/*!
    \overload
    Unmerge the cells in the \a range.
*/
int Worksheet::unmergeCells(const QString &range)
{
    QStringList cells = range.split(QLatin1Char(':'));
    if (cells.size() != 2)
        return -1;
    QPoint cell1 = xl_cell_to_rowcol(cells[0]);
    QPoint cell2 = xl_cell_to_rowcol(cells[1]);

    if (cell1 == QPoint(-1,-1) || cell2 == QPoint(-1, -1))
        return -1;

    return unmergeCells(CellRange(cell1.x(), cell1.y(), cell2.x(), cell2.y()));
}


/*!
  Returns all the merged cells
*/
QList<CellRange> Worksheet::mergedCells() const
{
    Q_D(const Worksheet);
    return d->merges;
}

void Worksheet::saveToXmlFile(QIODevice *device) const
{
    Q_D(const Worksheet);
    d->relationships.clear();

    QXmlStreamWriter writer(device);

    writer.writeStartDocument(QStringLiteral("1.0"), true);
    writer.writeStartElement(QStringLiteral("worksheet"));
    writer.writeAttribute(QStringLiteral("xmlns"), QStringLiteral("http://schemas.openxmlformats.org/spreadsheetml/2006/main"));
    writer.writeAttribute(QStringLiteral("xmlns:r"), QStringLiteral("http://schemas.openxmlformats.org/officeDocument/2006/relationships"));

    //for Excel 2010
    //    writer.writeAttribute("xmlns:mc", "http://schemas.openxmlformats.org/markup-compatibility/2006");
    //    writer.writeAttribute("xmlns:x14ac", "http://schemas.microsoft.com/office/spreadsheetml/2009/9/ac");
    //    writer.writeAttribute("mc:Ignorable", "x14ac");

    writer.writeStartElement(QStringLiteral("dimension"));
    writer.writeAttribute(QStringLiteral("ref"), d->generateDimensionString());
    writer.writeEndElement();//dimension

    writer.writeStartElement(QStringLiteral("sheetViews"));
    writer.writeStartElement(QStringLiteral("sheetView"));
    if (d->windowProtection)
        writer.writeAttribute(QStringLiteral("windowProtection"), QStringLiteral("1"));
    if (d->showFormulas)
        writer.writeAttribute(QStringLiteral("showFormulas"), QStringLiteral("1"));
    if (!d->showGridLines)
        writer.writeAttribute(QStringLiteral("showGridLines"), QStringLiteral("0"));
    if (!d->showRowColHeaders)
        writer.writeAttribute(QStringLiteral("showRowColHeaders"), QStringLiteral("0"));
    if (!d->showZeros)
        writer.writeAttribute(QStringLiteral("showZeros"), QStringLiteral("0"));
    if (d->rightToLeft)
        writer.writeAttribute(QStringLiteral("rightToLeft"), QStringLiteral("1"));
    if (d->tabSelected)
        writer.writeAttribute(QStringLiteral("tabSelected"), QStringLiteral("1"));
    if (!d->showRuler)
        writer.writeAttribute(QStringLiteral("showRuler"), QStringLiteral("0"));
    if (!d->showOutlineSymbols)
        writer.writeAttribute(QStringLiteral("showOutlineSymbols"), QStringLiteral("0"));
    if (!d->showWhiteSpace)
        writer.writeAttribute(QStringLiteral("showWhiteSpace"), QStringLiteral("0"));
    writer.writeAttribute(QStringLiteral("workbookViewId"), QStringLiteral("0"));
    writer.writeEndElement();//sheetView
    writer.writeEndElement();//sheetViews

    writer.writeStartElement(QStringLiteral("sheetFormatPr"));
    writer.writeAttribute(QStringLiteral("defaultRowHeight"), QString::number(d->default_row_height));
    if (d->default_row_height != 15)
        writer.writeAttribute(QStringLiteral("customHeight"), QStringLiteral("1"));
    if (d->default_row_zeroed)
        writer.writeAttribute(QStringLiteral("zeroHeight"), QStringLiteral("1"));
    if (d->outline_row_level)
        writer.writeAttribute(QStringLiteral("outlineLevelRow"), QString::number(d->outline_row_level));
    if (d->outline_col_level)
        writer.writeAttribute(QStringLiteral("outlineLevelCol"), QString::number(d->outline_col_level));
    //for Excel 2010
    //    writer.writeAttribute("x14ac:dyDescent", "0.25");
    writer.writeEndElement();//sheetFormatPr

    if (!d->colsInfo.isEmpty()) {
        writer.writeStartElement(QStringLiteral("cols"));
        QMapIterator<int, QSharedPointer<XlsxColumnInfo> > it(d->colsInfo);
        while (it.hasNext()) {
            it.next();
            QSharedPointer<XlsxColumnInfo> col_info = it.value();
            writer.writeStartElement(QStringLiteral("col"));
            writer.writeAttribute(QStringLiteral("min"), QString::number(col_info->firstColumn));
            writer.writeAttribute(QStringLiteral("max"), QString::number(col_info->lastColumn));
            if (col_info->width)
                writer.writeAttribute(QStringLiteral("width"), QString::number(col_info->width, 'g', 15));
            if (!col_info->format.isEmpty())
                writer.writeAttribute(QStringLiteral("style"), QString::number(col_info->format.xfIndex()));
            if (col_info->hidden)
                writer.writeAttribute(QStringLiteral("hidden"), QStringLiteral("1"));
            if (col_info->width)
                writer.writeAttribute(QStringLiteral("customWidth"), QStringLiteral("1"));
            if (col_info->outlineLevel)
                writer.writeAttribute(QStringLiteral("outlineLevel"), QString::number(col_info->outlineLevel));
            if (col_info->collapsed)
                writer.writeAttribute(QStringLiteral("collapsed"), QStringLiteral("1"));
            writer.writeEndElement();//col
        }
        writer.writeEndElement();//cols
    }

    writer.writeStartElement(QStringLiteral("sheetData"));
    if (d->dimension.isValid())
        d->saveXmlSheetData(writer);
    writer.writeEndElement();//sheetData

    d->saveXmlMergeCells(writer);
    foreach (const ConditionalFormatting cf, d->conditionalFormattingList)
        cf.saveToXml(writer);
    d->saveXmlDataValidations(writer);
    d->saveXmlHyperlinks(writer);
    d->saveXmlDrawings(writer);

    writer.writeEndElement();//worksheet
    writer.writeEndDocument();
}

void WorksheetPrivate::saveXmlSheetData(QXmlStreamWriter &writer) const
{
    calculateSpans();
    for (int row_num = dimension.firstRow(); row_num <= dimension.lastRow(); row_num++) {
        if (!(cellTable.contains(row_num) || comments.contains(row_num) || rowsInfo.contains(row_num))) {
            //Only process rows with cell data / comments / formatting
            continue;
        }

        int span_index = (row_num-1) / 16;
        QString span;
        if (row_spans.contains(span_index))
            span = row_spans[span_index];

        if (cellTable.contains(row_num)) {
            writer.writeStartElement(QStringLiteral("row"));
            writer.writeAttribute(QStringLiteral("r"), QString::number(row_num));

            if (!span.isEmpty())
                writer.writeAttribute(QStringLiteral("spans"), span);

            if (rowsInfo.contains(row_num)) {
                QSharedPointer<XlsxRowInfo> rowInfo = rowsInfo[row_num];
                if (!rowInfo->format.isEmpty()) {
                    writer.writeAttribute(QStringLiteral("s"), QString::number(rowInfo->format.xfIndex()));
                    writer.writeAttribute(QStringLiteral("customFormat"), QStringLiteral("1"));
                }
                if (rowInfo->height != 15 && rowInfo->height != 0) {
                    writer.writeAttribute(QStringLiteral("ht"), QString::number(rowInfo->height));
                    writer.writeAttribute(QStringLiteral("customHeight"), QStringLiteral("1"));
                }
                if (rowInfo->hidden)
                    writer.writeAttribute(QStringLiteral("hidden"), QStringLiteral("1"));
                if (rowInfo->outlineLevel > 0)
                    writer.writeAttribute(QStringLiteral("outlineLevel"), QString::number(rowInfo->outlineLevel));
                if (rowInfo->collapsed)
                    writer.writeAttribute(QStringLiteral("collapsed"), QStringLiteral("1"));
            }

            for (int col_num = dimension.firstColumn(); col_num <= dimension.lastColumn(); col_num++) {
                if (cellTable[row_num].contains(col_num)) {
                    saveXmlCellData(writer, row_num, col_num, cellTable[row_num][col_num]);
                }
            }
            writer.writeEndElement(); //row
        } else if (comments.contains(row_num)){

        } else {

        }
    }
}

void WorksheetPrivate::saveXmlCellData(QXmlStreamWriter &writer, int row, int col, QSharedPointer<Cell> cell) const
{
    //This is the innermost loop so efficiency is important.
    QString cell_pos = xl_rowcol_to_cell_fast(row, col);

    writer.writeStartElement(QStringLiteral("c"));
    writer.writeAttribute(QStringLiteral("r"), cell_pos);

    //Style used by the cell, row or col
    if (!cell->format().isEmpty())
        writer.writeAttribute(QStringLiteral("s"), QString::number(cell->format().xfIndex()));
    else if (rowsInfo.contains(row) && !rowsInfo[row]->format.isEmpty())
        writer.writeAttribute(QStringLiteral("s"), QString::number(rowsInfo[row]->format.xfIndex()));
    else if (colsInfoHelper.contains(col) && !colsInfoHelper[col]->format.isEmpty())
        writer.writeAttribute(QStringLiteral("s"), QString::number(colsInfoHelper[col]->format.xfIndex()));

    if (cell->dataType() == Cell::String) {
        int sst_idx;
        if (cell->isRichString())
            sst_idx = sharedStrings()->getSharedStringIndex(cell->d_ptr->richString);
        else
            sst_idx = sharedStrings()->getSharedStringIndex(cell->value().toString());

        writer.writeAttribute(QStringLiteral("t"), QStringLiteral("s"));
        writer.writeTextElement(QStringLiteral("v"), QString::number(sst_idx));
    } else if (cell->dataType() == Cell::InlineString) {
        writer.writeAttribute(QStringLiteral("t"), QStringLiteral("inlineStr"));
        writer.writeStartElement(QStringLiteral("is"));
        if (cell->isRichString()) {
            //Rich text string
            RichString string = cell->d_ptr->richString;
            for (int i=0; i<string.fragmentCount(); ++i) {
                writer.writeStartElement(QStringLiteral("r"));
                if (string.fragmentFormat(i).hasFontData()) {
                    writer.writeStartElement(QStringLiteral("rPr"));
                    //:Todo
                    writer.writeEndElement();// rPr
                }
                writer.writeStartElement(QStringLiteral("t"));
                writer.writeAttribute(QStringLiteral("xml:space"), QStringLiteral("preserve"));
                writer.writeCharacters(string.fragmentText(i));
                writer.writeEndElement();// t
                writer.writeEndElement(); // r
            }
        } else {
            writer.writeTextElement(QStringLiteral("t"), cell->value().toString());
        }
        writer.writeEndElement();//is
    } else if (cell->dataType() == Cell::Numeric){
        double value = cell->value().toDouble();
        writer.writeTextElement(QStringLiteral("v"), QString::number(value, 'g', 15));
    } else if (cell->dataType() == Cell::Formula) {
        bool ok = true;
        cell->formula().toDouble(&ok);
        if (!ok) //is string
            writer.writeAttribute(QStringLiteral("t"), QStringLiteral("str"));
        writer.writeTextElement(QStringLiteral("f"), cell->formula());
        writer.writeTextElement(QStringLiteral("v"), cell->value().toString());
    } else if (cell->dataType() == Cell::ArrayFormula) {
        writer.writeStartElement(QStringLiteral("f"));
        writer.writeAttribute(QStringLiteral("t"), QStringLiteral("array"));
        writer.writeAttribute(QStringLiteral("ref"), cell->d_ptr->range.toString());
        writer.writeCharacters(cell->formula());
        writer.writeEndElement(); //f
        writer.writeTextElement(QStringLiteral("v"), cell->value().toString());
    } else if (cell->dataType() == Cell::Boolean) {
        writer.writeAttribute(QStringLiteral("t"), QStringLiteral("b"));
        writer.writeTextElement(QStringLiteral("v"), cell->value().toBool() ? QStringLiteral("1") : QStringLiteral("0"));
    } else if (cell->dataType() == Cell::Blank) {
        //Ok, empty here.
    }
    writer.writeEndElement(); //c
}

void WorksheetPrivate::saveXmlMergeCells(QXmlStreamWriter &writer) const
{
    if (merges.isEmpty())
        return;

    writer.writeStartElement(QStringLiteral("mergeCells"));
    writer.writeAttribute(QStringLiteral("count"), QString::number(merges.size()));

    foreach (CellRange range, merges) {
        QString cell1 = xl_rowcol_to_cell(range.firstRow(), range.firstColumn());
        QString cell2 = xl_rowcol_to_cell(range.lastRow(), range.lastColumn());
        writer.writeEmptyElement(QStringLiteral("mergeCell"));
        writer.writeAttribute(QStringLiteral("ref"), cell1+QLatin1Char(':')+cell2);
    }

    writer.writeEndElement(); //mergeCells
}

void WorksheetPrivate::saveXmlDataValidations(QXmlStreamWriter &writer) const
{
    if (dataValidationsList.isEmpty())
        return;

    writer.writeStartElement(QStringLiteral("dataValidations"));
    writer.writeAttribute(QStringLiteral("count"), QString::number(dataValidationsList.size()));

    foreach (DataValidation validation, dataValidationsList)
        validation.saveToXml(writer);

    writer.writeEndElement(); //dataValidations
}

void WorksheetPrivate::saveXmlHyperlinks(QXmlStreamWriter &writer) const
{
    if (urlTable.isEmpty())
        return;

    writer.writeStartElement(QStringLiteral("hyperlinks"));
    QMapIterator<int, QMap<int, QSharedPointer<XlsxHyperlinkData> > > it(urlTable);
    while (it.hasNext()) {
        it.next();
        int row = it.key();
        QMapIterator <int, QSharedPointer<XlsxHyperlinkData> > it2(it.value());
        while (it2.hasNext()) {
            it2.next();
            int col = it2.key();
            QSharedPointer<XlsxHyperlinkData> data = it2.value();
            QString ref = xl_rowcol_to_cell(row, col);
            writer.writeEmptyElement(QStringLiteral("hyperlink"));
            writer.writeAttribute(QStringLiteral("ref"), ref);
            if (data->linkType == XlsxHyperlinkData::External) {
                //Update relationships
                relationships.addWorksheetRelationship(QStringLiteral("/hyperlink"), data->target, QStringLiteral("External"));

                writer.writeAttribute(QStringLiteral("r:id"), QStringLiteral("rId%1").arg(relationships.count()));
            }

            if (!data->location.isEmpty())
                writer.writeAttribute(QStringLiteral("location"), data->location);
            if (!data->display.isEmpty())
                writer.writeAttribute(QStringLiteral("display"), data->display);
            if (!data->tooltip.isEmpty())
                writer.writeAttribute(QStringLiteral("tooltip"), data->tooltip);
        }
    }

    writer.writeEndElement();//hyperlinks
}

void WorksheetPrivate::saveXmlDrawings(QXmlStreamWriter &writer) const
{
    if (!drawing)
        return;

    int idx = workbook->drawings().indexOf(drawing.data());
    relationships.addWorksheetRelationship(QStringLiteral("/drawing"), QStringLiteral("../drawings/drawing%1.xml").arg(idx+1));

    writer.writeEmptyElement(QStringLiteral("drawing"));
    writer.writeAttribute(QStringLiteral("r:id"), QStringLiteral("rId%1").arg(relationships.count()));
}

/*!
  Sets the \a height and \a format of the row \a row. Row height measured in point size. If format
  equals 0 then format is ignored. \a row is 1-indexed.
  Hides the row if \a hidden is true.

  Returns true if success.
 */
bool Worksheet::setRow(int row, double height, const Format &format, bool hidden)
{
    Q_D(Worksheet);
    int min_col = d->dimension.firstColumn() < 0 ? 0 : d->dimension.firstColumn();

    if (d->checkDimensions(row, min_col))
        return false;

    d->rowsInfo[row] = QSharedPointer<XlsxRowInfo>(new XlsxRowInfo(height, format, hidden));
    d->workbook->styles()->addXfFormat(format);
    return true;
}

void WorksheetPrivate::splitColsInfo(int colFirst, int colLast)
{
    // Split current columnInfo, for example, if "A:H" has been set,
    // we are trying to set "B:D", there should be "A", "B:D", "E:H".
    // This will be more complex if we try to set "C:F" after "B:D".
    {
        QMapIterator<int, QSharedPointer<XlsxColumnInfo> > it(colsInfo);
        while (it.hasNext()) {
            it.next();
            QSharedPointer<XlsxColumnInfo> info = it.value();
            if (colFirst > info->firstColumn && colFirst <= info->lastColumn) {
                //split the range,
                QSharedPointer<XlsxColumnInfo> info2(new XlsxColumnInfo(*info));
                info->lastColumn = colFirst - 1;
                info2->firstColumn = colFirst;
                colsInfo.insert(colFirst, info2);
                for (int c = info2->firstColumn; c <= info2->lastColumn; ++c)
                    colsInfoHelper[c] = info2;

                break;
            }
        }
    }
    {
        QMapIterator<int, QSharedPointer<XlsxColumnInfo> > it(colsInfo);
        while (it.hasNext()) {
            it.next();
            QSharedPointer<XlsxColumnInfo> info = it.value();
            if (colLast >= info->firstColumn && colLast < info->lastColumn) {
                QSharedPointer<XlsxColumnInfo> info2(new XlsxColumnInfo(*info));
                info->lastColumn = colLast;
                info2->firstColumn = colLast + 1;
                colsInfo.insert(colLast + 1, info2);
                for (int c = info2->firstColumn; c <= info2->lastColumn; ++c)
                    colsInfoHelper[c] = info2;

                break;
            }
        }
    }
}

/*!
  Sets column \a width and \a format for all columns from \a colFirst to \a colLast. Column
  width measured as the number of characters of the maximum digit width of the
  numbers 0, 1, 2, ..., 9 as rendered in the normal style's font. If format
  equals 0 then format is ignored. Both \a colFirst and \a colLast are all 1-indexed.
  Hides the column if \a hidden is true.

  Return true if success.
 */
bool Worksheet::setColumn(int colFirst, int colLast, double width, const Format &format, bool hidden)
{
    Q_D(Worksheet);
    bool ignore_row = true;
    bool ignore_col = (format.isValid() || (width && hidden)) ? false : true;

    if (colFirst > colLast)
        return false;

    if (d->checkDimensions(0, colLast, ignore_row, ignore_col))
        return false;
    if (d->checkDimensions(0, colFirst, ignore_row, ignore_col))
        return false;

    d->splitColsInfo(colFirst, colLast);

    QList<int> nodes;
    nodes.append(colFirst);
    for (int col = colFirst; col <= colLast; ++col) {
        if (d->colsInfo.contains(col)) {
            if (nodes.last() != col)
                nodes.append(col);
            int nextCol = d->colsInfo[col]->lastColumn + 1;
            if (nextCol <= colLast)
                nodes.append(nextCol);
        }
    }

    for (int idx = 0; idx < nodes.size(); ++idx) {
        int colStart = nodes[idx];
        if (d->colsInfo.contains(colStart)) {
            QSharedPointer<XlsxColumnInfo> info = d->colsInfo[colStart];
            info->width = width;
            info->format = format;
            info->hidden = hidden;
        } else {
            int colEnd = (idx == nodes.size() - 1) ? colLast : nodes[idx+1] - 1;
            QSharedPointer<XlsxColumnInfo> info(new XlsxColumnInfo(colStart, colEnd, width, format, hidden));
            d->colsInfo.insert(colFirst, info);
            for (int c = colStart; c <= colEnd; ++c)
                d->colsInfoHelper[c] = info;
        }
    }
    d->workbook->styles()->addXfFormat(format);

    return true;
}

/*!
  Sets column width and format for all columns from colFirst to colLast. Column
  width measured as the number of characters of the maximum digit width of the
  numbers 0, 1, 2, ..., 9 as rendered in the normal style's font. If format
  equals 0 then format is ignored. \a colFirst and \a colLast should be "A", "B", "C", ...
 */
bool Worksheet::setColumn(const QString &colFirst, const QString &colLast, double width, const Format &format, bool hidden)
{
    int col1 = xl_col_name_to_value(colFirst);
    int col2 = xl_col_name_to_value(colLast);

    if (col1 == -1 || col2 == -1)
        return false;

    return setColumn(col1, col2, width, format, hidden);
}

/*!
   Groups rows from \a rowFirst to \a rowLast with the given \a collapsed.

   Returns false if error occurs.
 */
bool Worksheet::groupRows(int rowFirst, int rowLast, bool collapsed)
{
    Q_D(Worksheet);

    for (int row=rowFirst; row<=rowLast; ++row) {
        if (d->rowsInfo.contains(row)) {
            d->rowsInfo[row]->outlineLevel += 1;
        } else {
            QSharedPointer<XlsxRowInfo> info(new XlsxRowInfo);
            info->outlineLevel += 1;
            d->rowsInfo.insert(row, info);
        }
        if (collapsed)
            d->rowsInfo[row]->hidden = true;
    }
    if (collapsed) {
        if (!d->rowsInfo.contains(rowLast+1))
            d->rowsInfo.insert(rowLast+1, QSharedPointer<XlsxRowInfo>(new XlsxRowInfo));
        d->rowsInfo[rowLast+1]->collapsed = true;
    }
    return true;
}

/*!
    \overload
 */
bool Worksheet::groupColumns(const QString &colFirst, const QString &colLast, bool collapsed)
{
    int col1 = xl_col_name_to_value(colFirst);
    int col2 = xl_col_name_to_value(colLast);

    if (col1 == -1 || col2 == -1)
        return false;

    return groupColumns(col1, col2, collapsed);
}

/*!
   Groups columns from \a colFirst to \a colLast with the given \a collapsed.
   Returns false if error occurs.
*/
bool Worksheet::groupColumns(int colFirst, int colLast, bool collapsed)
{
    Q_D(Worksheet);

    d->splitColsInfo(colFirst, colLast);

    QList<int> nodes;
    nodes.append(colFirst);
    for (int col = colFirst; col <= colLast; ++col) {
        if (d->colsInfo.contains(col)) {
            if (nodes.last() != col)
                nodes.append(col);
            int nextCol = d->colsInfo[col]->lastColumn + 1;
            if (nextCol <= colLast)
                nodes.append(nextCol);
        }
    }

    for (int idx = 0; idx < nodes.size(); ++idx) {
        int colStart = nodes[idx];
        if (d->colsInfo.contains(colStart)) {
            QSharedPointer<XlsxColumnInfo> info = d->colsInfo[colStart];
            info->outlineLevel += 1;
            if (collapsed)
                info->hidden = true;
        } else {
            int colEnd = (idx == nodes.size() - 1) ? colLast : nodes[idx+1] - 1;
            QSharedPointer<XlsxColumnInfo> info(new XlsxColumnInfo(colStart, colEnd));
            info->outlineLevel += 1;
            d->colsInfo.insert(colFirst, info);
            if (collapsed)
                info->hidden = true;
            for (int c = colStart; c <= colEnd; ++c)
                d->colsInfoHelper[c] = info;
        }
    }

    if (collapsed) {
        int col = colLast+1;
        d->splitColsInfo(col, col);
        if (d->colsInfo.contains(col))
            d->colsInfo[col]->collapsed = true;
        else {
            QSharedPointer<XlsxColumnInfo> info(new XlsxColumnInfo(col, col));
            info->collapsed = true;
            d->colsInfo.insert(col, info);
            d->colsInfoHelper[col] = info;
        }
    }

    return false;
}

/*!
    Return the range that contains cell data.
 */
CellRange Worksheet::dimension() const
{
    Q_D(const Worksheet);
    return d->dimension;
}

/*!
 * \internal
 */
Drawing *Worksheet::drawing() const
{
    Q_D(const Worksheet);
    return d->drawing.data();
}

/*
 Convert the height of a cell from user's units to pixels. If the
 height hasn't been set by the user we use the default value. If
 the row is hidden it has a value of zero.
*/
int WorksheetPrivate::rowPixelsSize(int row) const
{
    double height;
    if (row_sizes.contains(row))
        height = row_sizes[row];
    else
        height = default_row_height;
    return static_cast<int>(4.0 / 3.0 *height);
}

/*
 Convert the width of a cell from user's units to pixels. Excel rounds
 the column width to the nearest pixel. If the width hasn't been set
 by the user we use the default value. If the column is hidden it
 has a value of zero.
*/
int WorksheetPrivate::colPixelsSize(int col) const
{
    double max_digit_width = 7.0; //For Calabri 11
    double padding = 5.0;
    int pixels = 0;

    if (col_sizes.contains(col)) {
        double width = col_sizes[col];
        if (width < 1)
            pixels = static_cast<int>(width * (max_digit_width + padding) + 0.5);
        else
            pixels = static_cast<int>(width * max_digit_width + 0.5) + padding;
    } else {
        pixels = 64;
    }
    return pixels;
}

QSharedPointer<Cell> WorksheetPrivate::loadXmlNumericCellData(QXmlStreamReader &reader)
{
    Q_ASSERT(reader.name() == QLatin1String("c"));

    QString v_str;
    QString f_str;
    QSharedPointer<Cell> cell;
    while (!reader.atEnd() && !(reader.name() == QLatin1String("c") && reader.tokenType() == QXmlStreamReader::EndElement)) {
        reader.readNextStartElement();
        if (reader.tokenType() == QXmlStreamReader::StartElement) {
            if (reader.name() == QLatin1String("v")) {
                v_str = reader.readElementText();
            } else if (reader.name() == QLatin1String("f")) {
                QXmlStreamAttributes fAttrs = reader.attributes();
                if (fAttrs.hasAttribute(QLatin1String("array"))) {
                    cell = QSharedPointer<Cell>(new Cell(0, Cell::ArrayFormula));
                    cell->d_ptr->range = CellRange(fAttrs.value(QLatin1String("ref")).toString());
                } else {
                    cell = QSharedPointer<Cell>(new Cell(0, Cell::Formula));
                }
                f_str = reader.readElementText();
            }
        }
    }

    if (v_str.isEmpty() && f_str.isEmpty()) {
        //blank type
        return QSharedPointer<Cell>(new Cell(QVariant(), Cell::Blank));
    } else if (f_str.isEmpty()) {
        //numeric type
        return QSharedPointer<Cell>(new Cell(v_str.toDouble(), Cell::Numeric));
    } else {
        //formula type
        cell->d_ptr->value = v_str.toDouble();
        cell->d_ptr->formula = f_str;
    }

    return cell;
}

void WorksheetPrivate::loadXmlSheetData(QXmlStreamReader &reader)
{
    Q_Q(Worksheet);
    Q_ASSERT(reader.name() == QLatin1String("sheetData"));

    while (!reader.atEnd() && !(reader.name() == QLatin1String("sheetData") && reader.tokenType() == QXmlStreamReader::EndElement)) {
        reader.readNextStartElement();

        if (reader.tokenType() == QXmlStreamReader::StartElement) {
            if (reader.name() == QLatin1String("row")) {
                QXmlStreamAttributes attributes = reader.attributes();

                if (attributes.hasAttribute(QLatin1String("customFormat"))
                        || attributes.hasAttribute(QLatin1String("customHeight"))
                        || attributes.hasAttribute(QLatin1String("hidden"))
                        || attributes.hasAttribute(QLatin1String("outlineLevel"))
                        || attributes.hasAttribute(QLatin1String("collapsed"))) {

                    QSharedPointer<XlsxRowInfo> info(new XlsxRowInfo);
                    if (attributes.hasAttribute(QLatin1String("customFormat")) && attributes.hasAttribute(QLatin1String("s"))) {
                        int idx = attributes.value(QLatin1String("s")).toString().toInt();
                        info->format = workbook->styles()->xfFormat(idx);
                    }
                    if (attributes.hasAttribute(QLatin1String("customHeight")) && attributes.hasAttribute(QLatin1String("ht"))) {
                        info->height = attributes.value(QLatin1String("ht")).toString().toDouble();
                    }
                    //both "hidden" and "collapsed" default are false
                    info->hidden = attributes.value(QLatin1String("hidden")) == QLatin1String("1");
                    info->collapsed = attributes.value(QLatin1String("collapsed")) == QLatin1String("1");

                    if (attributes.hasAttribute(QLatin1String("outlineLevel")))
                        info->outlineLevel = attributes.value(QLatin1String("outlineLevel")).toString().toInt();

                    //"r" is optional too.
                    if (attributes.hasAttribute(QLatin1String("r"))) {
                        int row = attributes.value(QLatin1String("r")).toString().toInt();
                        rowsInfo[row] = info;
                    }
                }

            } else if (reader.name() == QLatin1String("c")) {
                QXmlStreamAttributes attributes = reader.attributes();
                QString r = attributes.value(QLatin1String("r")).toString();
                QPoint pos = xl_cell_to_rowcol(r);

                //get format
                Format format;
                if (attributes.hasAttribute(QLatin1String("s"))) {
                    int idx = attributes.value(QLatin1String("s")).toString().toInt();
                    format = workbook->styles()->xfFormat(idx);
                    if (!format.isValid())
                        qDebug()<<QStringLiteral("<c s=\"%1\">Invalid style index: ").arg(idx)<<idx;
                }

                if (attributes.hasAttribute(QLatin1String("t"))) {
                    QString type = attributes.value(QLatin1String("t")).toString();
                    if (type == QLatin1String("s")) {
                        //string type
                        while (!reader.atEnd() && !(reader.name() == QLatin1String("c") && reader.tokenType() == QXmlStreamReader::EndElement)) {
                            reader.readNextStartElement();
                            if (reader.name() == QLatin1String("v")) {
                                int sst_idx = reader.readElementText().toInt();
                                sharedStrings()->incRefByStringIndex(sst_idx);
                                RichString rs = sharedStrings()->getSharedString(sst_idx);
                                QSharedPointer<Cell> data(new Cell(rs.toPlainString() ,Cell::String, format, q));
                                if (rs.isRichString())
                                    data->d_ptr->richString = rs;
                                cellTable[pos.x()][pos.y()] = QSharedPointer<Cell>(data);
                            }
                        }
                    } else if (type == QLatin1String("inlineStr")) {
                        //inline string type
                        while (!reader.atEnd() && !(reader.name() == QLatin1String("c") && reader.tokenType() == QXmlStreamReader::EndElement)) {
                            reader.readNextStartElement();
                            if (reader.tokenType() == QXmlStreamReader::StartElement) {
                                //:Todo, add rich text read support
                                if (reader.name() == QLatin1String("t")) {
                                    QString value = reader.readElementText();
                                    QSharedPointer<Cell> data(new Cell(value, Cell::InlineString, format, q));
                                    cellTable[pos.x()][pos.y()] = data;
                                }
                            }
                        }
                    } else if (type == QLatin1String("b")) {
                        //bool type
                        reader.readNextStartElement();
                        if (reader.name() == QLatin1String("v")) {
                            QString value = reader.readElementText();
                            QSharedPointer<Cell> data(new Cell(value.toInt() ? true : false, Cell::Boolean, format, q));
                            cellTable[pos.x()][pos.y()] = data;
                        }
                    } else if (type == QLatin1String("str")) {
                        //formula type
                        QSharedPointer<Cell> data = loadXmlNumericCellData(reader);
                        data->d_ptr->format = format;
                        data->d_ptr->parent = q;
                        cellTable[pos.x()][pos.y()] = data;
                    } else if (type == QLatin1String("e")) {
                        //error type, such as #DIV/0! #NULL! #REF! etc
                        QString v_str, f_str;
                        while (!reader.atEnd() && !(reader.name() == QLatin1String("c") && reader.tokenType() == QXmlStreamReader::EndElement)) {
                            reader.readNextStartElement();
                            if (reader.tokenType() == QXmlStreamReader::StartElement) {
                                if (reader.name() == QLatin1String("v"))
                                    v_str = reader.readElementText();
                                else if (reader.name() == QLatin1String("f"))
                                    f_str = reader.readElementText();
                            }
                        }
                        QSharedPointer<Cell> data(new Cell(v_str, Cell::Error, format, q));
                        if (!f_str.isEmpty())
                            data->d_ptr->formula = f_str;
                        cellTable[pos.x()][pos.y()] = data;
                    } else if (type == QLatin1String("n")) {
                        QSharedPointer<Cell> data = loadXmlNumericCellData(reader);
                        data->d_ptr->format = format;
                        data->d_ptr->parent = q;
                        cellTable[pos.x()][pos.y()] = data;
                    }
                } else {
                    //default is "n"
                    QSharedPointer<Cell> data = loadXmlNumericCellData(reader);
                    data->d_ptr->format = format;
                    data->d_ptr->parent = q;
                    cellTable[pos.x()][pos.y()] = data;
                }
            }
        }
    }
}

void WorksheetPrivate::loadXmlColumnsInfo(QXmlStreamReader &reader)
{
    Q_ASSERT(reader.name() == QLatin1String("cols"));

    while (!reader.atEnd() && !(reader.name() == QLatin1String("cols") && reader.tokenType() == QXmlStreamReader::EndElement)) {
        reader.readNextStartElement();
        if (reader.tokenType() == QXmlStreamReader::StartElement) {
            if (reader.name() == QLatin1String("col")) {
                QSharedPointer<XlsxColumnInfo> info(new XlsxColumnInfo);

                QXmlStreamAttributes colAttrs = reader.attributes();
                int min = colAttrs.value(QLatin1String("min")).toString().toInt();
                int max = colAttrs.value(QLatin1String("max")).toString().toInt();
                info->firstColumn = min;
                info->lastColumn = max;

                //!Todo, customWidth support.
                //Note, node may have "width" without "customWidth"
                if (colAttrs.hasAttribute(QLatin1String("width"))) {
                    double width = colAttrs.value(QLatin1String("width")).toString().toDouble();
                    info->width = width;
                }

                info->hidden = colAttrs.value(QLatin1String("hidden")) == QLatin1String("1");
                info->collapsed = colAttrs.value(QLatin1String("collapsed")) == QLatin1String("1");

                if (colAttrs.hasAttribute(QLatin1String("style"))) {
                    int idx = colAttrs.value(QLatin1String("style")).toString().toInt();
                    info->format = workbook->styles()->xfFormat(idx);
                }
                if (colAttrs.hasAttribute(QLatin1String("outlineLevel")))
                    info->outlineLevel = colAttrs.value(QLatin1String("outlineLevel")).toString().toInt();

                colsInfo.insert(min, info);
                for (int col=min; col<=max; ++col)
                    colsInfoHelper[col] = info;
            }
        }
    }
}

void WorksheetPrivate::loadXmlMergeCells(QXmlStreamReader &reader)
{
    Q_ASSERT(reader.name() == QLatin1String("mergeCells"));

    QXmlStreamAttributes attributes = reader.attributes();
    int count = attributes.value(QLatin1String("count")).toString().toInt();

    while (!reader.atEnd() && !(reader.name() == QLatin1String("mergeCells") && reader.tokenType() == QXmlStreamReader::EndElement)) {
        reader.readNextStartElement();
        if (reader.tokenType() == QXmlStreamReader::StartElement) {
            if (reader.name() == QLatin1String("mergeCell")) {
                QXmlStreamAttributes attrs = reader.attributes();
                QString rangeStr = attrs.value(QLatin1String("ref")).toString();
                QStringList items = rangeStr.split(QLatin1Char(':'));
                if (items.size() != 2) {
                    //Error
                } else {
                    QPoint p0 = xl_cell_to_rowcol(items[0]);
                    QPoint p1 = xl_cell_to_rowcol(items[1]);

                    merges.append(CellRange(p0.x(), p0.y(), p1.x(), p1.y()));
                }
            }
        }
    }

    if (merges.size() != count)
        qDebug("read merge cells error");
}

void WorksheetPrivate::loadXmlDataValidations(QXmlStreamReader &reader)
{
    Q_ASSERT(reader.name() == QLatin1String("dataValidations"));
    QXmlStreamAttributes attributes = reader.attributes();
    int count = attributes.value(QLatin1String("count")).toString().toInt();

    while (!reader.atEnd() && !(reader.name() == QLatin1String("dataValidations")
            && reader.tokenType() == QXmlStreamReader::EndElement)) {
        reader.readNextStartElement();
        if (reader.tokenType() == QXmlStreamReader::StartElement
                && reader.name() == QLatin1String("dataValidation")) {
            dataValidationsList.append(DataValidation::loadFromXml(reader));
        }
    }

    if (dataValidationsList.size() != count)
        qDebug("read data validation error");
}

void WorksheetPrivate::loadXmlSheetViews(QXmlStreamReader &reader)
{
    Q_ASSERT(reader.name() == QLatin1String("sheetViews"));

    while (!reader.atEnd() && !(reader.name() == QLatin1String("sheetViews")
            && reader.tokenType() == QXmlStreamReader::EndElement)) {
        reader.readNextStartElement();
        if (reader.tokenType() == QXmlStreamReader::StartElement && reader.name() == QLatin1String("sheetView")) {
            QXmlStreamAttributes attrs = reader.attributes();
            //default false
            windowProtection = attrs.value(QLatin1String("windowProtection")) == QLatin1String("1");
            showFormulas = attrs.value(QLatin1String("showFormulas")) == QLatin1String("1");
            rightToLeft = attrs.value(QLatin1String("rightToLeft")) == QLatin1String("1");
            tabSelected = attrs.value(QLatin1String("tabSelected")) == QLatin1String("1");
            //default true
            showGridLines = attrs.value(QLatin1String("showGridLines")) != QLatin1String("0");
            showRowColHeaders = attrs.value(QLatin1String("showRowColHeaders")) != QLatin1String("0");
            showZeros = attrs.value(QLatin1String("showZeros")) != QLatin1String("0");
            showRuler = attrs.value(QLatin1String("showRuler")) != QLatin1String("0");
            showOutlineSymbols = attrs.value(QLatin1String("showOutlineSymbols")) != QLatin1String("0");
            showWhiteSpace = attrs.value(QLatin1String("showWhiteSpace")) != QLatin1String("0");
        }
    }
}

void WorksheetPrivate::loadXmlHyperlinks(QXmlStreamReader &reader)
{
    Q_ASSERT(reader.name() == QLatin1String("hyperlinks"));

    while (!reader.atEnd() && !(reader.name() == QLatin1String("hyperlinks")
            && reader.tokenType() == QXmlStreamReader::EndElement)) {
        reader.readNextStartElement();
        if (reader.tokenType() == QXmlStreamReader::StartElement && reader.name() == QLatin1String("hyperlink")) {
            QXmlStreamAttributes attrs = reader.attributes();
            QPoint pos = xl_cell_to_rowcol(attrs.value(QLatin1String("ref")).toString());
            if (pos.x() != -1) { //Valid
                QSharedPointer<XlsxHyperlinkData> link(new XlsxHyperlinkData);
                link->display = attrs.value(QLatin1String("display")).toString();
                link->tooltip = attrs.value(QLatin1String("tooltip")).toString();
                link->location = attrs.value(QLatin1String("location")).toString();

                if (attrs.hasAttribute(QLatin1String("r:id"))) {
                    link->linkType = XlsxHyperlinkData::External;
                    XlsxRelationship ship = relationships.getRelationshipById(attrs.value(QLatin1String("r:id")).toString());
                    link->target = ship.target;
                } else {
                    link->linkType = XlsxHyperlinkData::Internal;
                }

                urlTable[pos.x()][pos.y()] = link;
            }
        }
    }
}

bool Worksheet::loadFromXmlFile(QIODevice *device)
{
    Q_D(Worksheet);

    QXmlStreamReader reader(device);
    while (!reader.atEnd()) {
        reader.readNextStartElement();
        if (reader.tokenType() == QXmlStreamReader::StartElement) {
            if (reader.name() == QLatin1String("dimension")) {
                QXmlStreamAttributes attributes = reader.attributes();
                QString range = attributes.value(QLatin1String("ref")).toString();
                d->dimension = CellRange(range);
            } else if (reader.name() == QLatin1String("sheetViews")) {
                d->loadXmlSheetViews(reader);
            } else if (reader.name() == QLatin1String("sheetFormatPr")) {

            } else if (reader.name() == QLatin1String("cols")) {
                d->loadXmlColumnsInfo(reader);
            } else if (reader.name() == QLatin1String("sheetData")) {
                d->loadXmlSheetData(reader);
            } else if (reader.name() == QLatin1String("mergeCells")) {
                d->loadXmlMergeCells(reader);
            } else if (reader.name() == QLatin1String("dataValidations")) {
                d->loadXmlDataValidations(reader);
            } else if (reader.name() == QLatin1String("conditionalFormatting")) {
                ConditionalFormatting cf;
                cf.loadFromXml(reader, workbook()->styles());
                d->conditionalFormattingList.append(cf);
            } else if (reader.name() == QLatin1String("hyperlinks")) {
                d->loadXmlHyperlinks(reader);
            } else if (reader.name() == QLatin1String("drawing")) {
                QString rId = reader.attributes().value(QStringLiteral("r:id")).toString();
                QString name = d->relationships.getRelationshipById(rId).target;
                QString path = QDir::cleanPath(splitPath(filePath())[0] + QLatin1String("/") + name);
                d->drawing = QSharedPointer<Drawing>(new Drawing(this));
                d->drawing->setFilePath(path);
            }
        }
    }

    return true;
}

/*!
 * \internal
 *  Unit test can use this member to get sharedString object.
 */
SharedStrings *WorksheetPrivate::sharedStrings() const
{
    return workbook->sharedStrings();
}

/*!
 * Return the workbook
 */
Workbook *Worksheet::workbook() const
{
    Q_D(const Worksheet);
    return d->workbook;
}

QT_END_NAMESPACE_XLSX