We can read and modify existing simple .xlsx file now

README.md

@@ -72,6 +72,7 @@ The library, the header files, and the feature file will be installed to your sy
 ## References
 
 * https://github.com/jmcnamara/XlsxWriter
+* http://openpyxl.readthedocs.org
 * http://officeopenxml.com/anatomyofOOXML-xlsx.php
 * http://www.libxl.com
 * http://closedxml.codeplex.com/

examples/xlsx/readwrite/doc/src/readwrite.qdoc

@@ -0,0 +1,10 @@
+/*!
+    \title Xlsx Readwrite Example
+    \example readwrite
+    \brief Open an existing xlsx file, modify and save it.
+
+    \ingroup qtxlsx
+
+    This example demonstrates how to modify an existing
+    .xlsx file with Qt Xlsx Library.
+*/

examples/xlsx/readwrite/main.cpp

@@ -0,0 +1,18 @@
+#include "xlsxdocument.h"
+
+int main()
+{
+    //Generate a simple xlsx file at first.
+    QXlsx::Document xlsx;
+    xlsx.write("A1", "Hello Qt!");
+    xlsx.write("A2", 500);
+    xlsx.saveAs("first.xlsx");
+
+    //Read, edit, save
+    QXlsx::Document xlsx2("first.xlsx");
+    xlsx2.addWorksheet("Second");
+    xlsx2.write("A1", "Hello Qt again!");
+    xlsx2.saveAs("second.xlsx");
+
+    return 0;
+}

examples/xlsx/readwrite/readwrite.pro

@@ -0,0 +1,12 @@
+TARGET = mergecells
+
+#include(../../../src/xlsx/qtxlsx.pri)
+QT += xlsx
+
+TARGET = readwrite
+CONFIG   += console
+CONFIG   -= app_bundle
+
+TEMPLATE = app
+
+SOURCES += main.cpp

examples/xlsx/xlsx.pro

@@ -4,5 +4,6 @@ SUBDIRS = hello style \
     image \
     mergecells \
     rowcolumn \
-    numberformat
+    numberformat \
+    readwrite
 

src/xlsx/doc/src/qtxlsx-index.qdoc

@@ -110,5 +110,6 @@
         \li \l{Xlsx Hello Example}
         \li \l{Xlsx Style Example}
         \li \l{Xlsx DocProperties Example}
+        \li \l{Xlsx Readwrite Example}
     \endlist
 */

src/xlsx/xlsxdocument.h

@@ -28,6 +28,7 @@
 
 #include "xlsxglobal.h"
 #include <QObject>
+#include <QVariant>
 class QIODevice;
 class QImage;
 

src/xlsx/xlsxpackage.cpp

@@ -25,6 +25,8 @@
 #include "xlsxpackage_p.h"
 #include "xlsxworkbook.h"
 #include "xlsxworksheet.h"
+#include "xlsxworkbook_p.h"
+#include "xlsxutility_p.h"
 #include "xlsxcontenttypes_p.h"
 #include "xlsxsharedstrings_p.h"
 #include "xlsxdocpropscore_p.h"
@@ -38,6 +40,8 @@
 #include "xlsxdocument.h"
 #include <QBuffer>
 #include <QDebug>
+#include <QDir>
+#include <QFileInfo>
 
 namespace QXlsx {
 
@@ -125,17 +129,59 @@ bool Package::parsePackage(QIODevice *packageDevice)
             m_document->setDocumentProperty(name, props.property(name));
     }
 
-    //load workbook now
-    QList<XlsxRelationship> rels_xl = rootRels.documentRelationships(QStringLiteral("/officeDocument"));
-    if (!rels_xl.isEmpty()) {
-        //Get the app property file name if it exists.
+    //load workbook now, Get the workbook file path from the root rels file
     //In normal case, this should be "xl/workbook.xml"
-        QString xlworkbook_Name = rels_xl[0].target;
+    QList<XlsxRelationship> rels_xl = rootRels.documentRelationships(QStringLiteral("/officeDocument"));
+    if (rels_xl.isEmpty())
+        return false;
+    QString xlworkbook_Path = rels_xl[0].target;
+    QStringList xlworkbook_PathList = splitPath(xlworkbook_Path);
+    QString xlworkbook_Dir = xlworkbook_PathList[0];
+    QString xlworkbook_Name = xlworkbook_PathList[1];
+    QSharedPointer<Workbook> book = Workbook::loadFromXmlData(zipReader.fileData(xlworkbook_Path));
+    QList<QPair<QString, QString> > sheetNameIdPairList = book->d_func()->sheetNameIdPairList;
+    Relationships xlworkbook_Rels = Relationships::loadFromXmlData(
+                zipReader.fileData(xlworkbook_Dir+QStringLiteral("/_rels/")+xlworkbook_Name+QStringLiteral(".rels")));
+
+    //load styles
+    QList<XlsxRelationship> rels_styles = xlworkbook_Rels.documentRelationships(QStringLiteral("/styles"));
+    if (!rels_styles.isEmpty()) {
+        //In normal case this should be styles.xml which in xl
+        //:Todo
+    }
 
-        //ToDo: Read the workbook here!
+    //load sharedStrings
+    QList<XlsxRelationship> rels_sharedStrings = xlworkbook_Rels.documentRelationships(QStringLiteral("/sharedStrings"));
+    if (!rels_sharedStrings.isEmpty()) {
+        //In normal case this should be sharedStrings.xml which in xl
+        QString name = rels_sharedStrings[0].target;
+        QString path = xlworkbook_Dir + QLatin1String("/") + name;
+        QSharedPointer<SharedStrings> sst= SharedStrings::loadFromXmlData(zipReader.fileData(path));
+        m_document->workbook()->d_ptr->sharedStrings = sst;
     }
 
+    //load theme
+    QList<XlsxRelationship> rels_theme = xlworkbook_Rels.documentRelationships(QStringLiteral("/theme"));
+    if (!rels_theme.isEmpty()) {
+        //In normal case this should be theme/theme1.xml which in xl
+        //:Todo
+    }
+
+    //load worksheets
+    QList<XlsxRelationship> rels_worksheets = xlworkbook_Rels.documentRelationships(QStringLiteral("/worksheet"));
+    if (rels_worksheets.isEmpty())
         return false;
+
+    for (int i=0; i<sheetNameIdPairList.size(); ++i) {
+        QPair<QString, QString> pair = sheetNameIdPairList[i];
+        QString worksheet_rId = pair.second;
+        QString name = xlworkbook_Rels.getRelationshipById(worksheet_rId).target;
+        QString worksheet_path = xlworkbook_Dir + QLatin1String("/") + name;
+        Worksheet *sheet = m_document->workbook()->addWorksheet(pair.first);
+        sheet->loadFromXmlData(zipReader.fileData(worksheet_path));
+    }
+
+    return true;
 }
 
 bool Package::createPackage(QIODevice *package)

src/xlsx/xlsxsharedstrings.cpp

@@ -59,6 +59,11 @@ int SharedStrings::addSharedString(const QString &string)
     return index;
 }
 
+void SharedStrings::incRefByStringIndex(int idx)
+{
+    addSharedString(m_stringList[idx]);
+}
+
 void SharedStrings::removeSharedString(const QString &string)
 {
     if (!m_stringTable.contains(string))

src/xlsx/xlsxsharedstrings_p.h

@@ -54,6 +54,7 @@ public:
     
     int addSharedString(const QString &string);
     void removeSharedString(const QString &string);
+    void incRefByStringIndex(int idx);
 
     int getSharedStringIndex(const QString &string) const;
     QString getSharedString(int index) const;

src/xlsx/xlsxutility.cpp

@@ -28,6 +28,7 @@
 #include <QPoint>
 #include <QRegularExpression>
 #include <QMap>
+#include <QStringList>
 
 namespace QXlsx {
 
@@ -41,6 +42,15 @@ int intPow(int x, int p)
   else return x * tmp * tmp;
 }
 
+QStringList splitPath(const QString &path)
+{
+    int idx = path.lastIndexOf(QLatin1Char('/'));
+    if (idx == -1)
+        return QStringList()<<QStringLiteral(".")<<path;
+
+    return QStringList()<<path.left(idx)<<path.mid(idx+1);
+}
+
 QPoint xl_cell_to_rowcol(const QString &cell_str)
 {
     if (cell_str.isEmpty())

src/xlsx/xlsxutility_p.h

@@ -28,13 +28,17 @@
 #include "xlsxglobal.h"
 class QPoint;
 class QString;
+class QStringList;
 
 namespace QXlsx {
 
 XLSX_AUTOTEST_EXPORT int intPow(int x, int p);
+XLSX_AUTOTEST_EXPORT QStringList splitPath(const QString &path);
+
 XLSX_AUTOTEST_EXPORT QPoint xl_cell_to_rowcol(const QString &cell_str);
 XLSX_AUTOTEST_EXPORT QString xl_col_to_name(int col_num);
 XLSX_AUTOTEST_EXPORT QString xl_rowcol_to_cell(int row, int col, bool row_abs=false, bool col_abs=false);
 XLSX_AUTOTEST_EXPORT QString xl_rowcol_to_cell_fast(int row, int col);
+
 } //QXlsx
 #endif // XLSXUTILITY_H

src/xlsx/xlsxworkbook.cpp

@@ -337,12 +337,4 @@ QSharedPointer<Workbook> Workbook::loadFromXmlData(const QByteArray &data)
     return loadFromXmlFile(&buffer);
 }
 
-void Workbook::addWorksheet(const QString &name, QSharedPointer<Worksheet> sheet)
-{
-    Q_D(Workbook);
-
-    sheet->setSheetName(name);
-    d->worksheets.append(sheet);
-}
-
 QT_END_NAMESPACE_XLSX

src/xlsx/xlsxworkbook.h

@@ -78,7 +78,6 @@ private:
     QByteArray saveToXmlData();
     static QSharedPointer<Workbook> loadFromXmlFile(QIODevice *device);
     static QSharedPointer<Workbook> loadFromXmlData(const QByteArray &data);
-    void addWorksheet(const QString &name, QSharedPointer<Worksheet> sheet);
 
     SharedStrings *sharedStrings();
     Styles *styles();

src/xlsx/xlsxworksheet.cpp

@@ -1074,9 +1074,9 @@ QByteArray Worksheet::saveToXmlData()
     return data;
 }
 
-QSharedPointer<Worksheet> Worksheet::loadFromXmlFile(QIODevice *device)
+bool Worksheet::loadFromXmlFile(QIODevice *device)
 {
-    Worksheet *sheet = new Worksheet(QStringLiteral("Sheet9999"));
+    Q_D(Worksheet);
 
     XmlStreamReader reader(device);
     while(!reader.atEnd()) {
@@ -1088,16 +1088,16 @@ QSharedPointer<Worksheet> Worksheet::loadFromXmlFile(QIODevice *device)
                  if (range.size() == 2) {
                      QPoint start = xl_cell_to_rowcol(range[0]);
                      QPoint end = xl_cell_to_rowcol(range[1]);
-                     sheet->d_func()->dim_rowmin = start.x();
-                     sheet->d_func()->dim_colmin = start.y();
-                     sheet->d_func()->dim_rowmax = end.x();
-                     sheet->d_func()->dim_colmax = end.y();
+                     d->dim_rowmin = start.x();
+                     d->dim_colmin = start.y();
+                     d->dim_rowmax = end.x();
+                     d->dim_colmax = end.y();
                  } else {
                      QPoint p = xl_cell_to_rowcol(range[0]);
-                     sheet->d_func()->dim_rowmin = p.x();
-                     sheet->d_func()->dim_colmin = p.y();
-                     sheet->d_func()->dim_rowmax = p.x();
-                     sheet->d_func()->dim_colmax = p.y();
+                     d->dim_rowmin = p.x();
+                     d->dim_colmin = p.y();
+                     d->dim_rowmax = p.x();
+                     d->dim_colmax = p.y();
                  }
              } else if (reader.name() == QLatin1String("c")) {
                  QXmlStreamAttributes attributes = reader.attributes();
@@ -1111,8 +1111,9 @@ QSharedPointer<Worksheet> Worksheet::loadFromXmlFile(QIODevice *device)
                          reader.readNextStartElement();
                          if (reader.name() == QLatin1String("v")) {
                              QString value = reader.readElementText();
+                             d->workbook->sharedStrings()->incRefByStringIndex(value.toInt());
                              XlsxCellData *data = new XlsxCellData(value ,XlsxCellData::String);
-                             sheet->d_func()->cellTable[pos.x()][pos.y()] = QSharedPointer<XlsxCellData>(data);
+                             d->cellTable[pos.x()][pos.y()] = QSharedPointer<XlsxCellData>(data);
                          }
                      }
                  } else {
@@ -1121,17 +1122,17 @@ QSharedPointer<Worksheet> Worksheet::loadFromXmlFile(QIODevice *device)
                      if (reader.name() == QLatin1String("v")) {
                          QString value = reader.readElementText();
                          XlsxCellData *data = new XlsxCellData(value ,XlsxCellData::Number);
-                         sheet->d_func()->cellTable[pos.x()][pos.y()] = QSharedPointer<XlsxCellData>(data);
+                         d->cellTable[pos.x()][pos.y()] = QSharedPointer<XlsxCellData>(data);
                      }
                  }
              }
          }
     }
 
-    return QSharedPointer<Worksheet> (sheet);
+    return true;
 }
 
-QSharedPointer<Worksheet> Worksheet::loadFromXmlData(const QByteArray &data)
+bool Worksheet::loadFromXmlData(const QByteArray &data)
 {
     QBuffer buffer;
     buffer.setData(data);

src/xlsx/xlsxworksheet.h

@@ -74,8 +74,8 @@ public:
 
     void saveToXmlFile(QIODevice *device);
     QByteArray saveToXmlData();
-    static QSharedPointer<Worksheet> loadFromXmlFile(QIODevice *device);
-    static QSharedPointer<Worksheet> loadFromXmlData(const QByteArray &data);
+    bool loadFromXmlFile(QIODevice *device);
+    bool loadFromXmlData(const QByteArray &data);
 
     ~Worksheet();
 private: