DOCX export: write document variables

This means that in case a user field is exported to DOCX and the user
updates the field, the result will be still correct, not empty.

Change-Id: I2b52292c70aa6f597f92af95e16c773839247efa
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/87748
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>
Tested-by: Jenkins

3 files changed, 65 insertions, 0 deletions

diff --git a/sw/qa/extras/ooxmlexport/ooxmlexport14.cxx b/sw/qa/extras/ooxmlexport/ooxmlexport14.cxx
index b79850140144..b8069d9f84df 100644
--- a/sw/qa/extras/ooxmlexport/ooxmlexport14.cxx
+++ b/sw/qa/extras/ooxmlexport/ooxmlexport14.cxx
@@ -301,6 +301,7 @@ CPPUNIT_TEST_FIXTURE(SwModelTestBase, testUserField)
     utl::MediaDescriptor aMediaDescriptor;
     aMediaDescriptor["FilterName"] <<= OUString("Office Open XML Text");
     xStorable->storeToURL(maTempFile.GetURL(), aMediaDescriptor.getAsConstPropertyValueList());
+    validate(maTempFile.GetFileName(), test::OOXML);
     mbExported = true;
     xmlDocPtr pXmlDoc = parseExport("word/document.xml");
     CPPUNIT_ASSERT(pXmlDoc);
@@ -309,6 +310,12 @@ CPPUNIT_TEST_FIXTURE(SwModelTestBase, testUserField)
     // exported as <w:t>User Field foo = bar</w:t>.
     assertXPathContent(pXmlDoc, "//w:p/w:r[2]/w:instrText", " DOCVARIABLE foo ");
     assertXPathContent(pXmlDoc, "//w:p/w:r[4]/w:t", "bar");
+
+    // Make sure that not only the variables, but also their values are written.
+    pXmlDoc = parseExport("word/settings.xml");
+    CPPUNIT_ASSERT(pXmlDoc);
+    assertXPath(pXmlDoc, "//w:docVars/w:docVar", "name", "foo");
+    assertXPath(pXmlDoc, "//w:docVars/w:docVar", "val", "bar");
 }
 
 DECLARE_OOXMLEXPORT_TEST(testTdf124367, "tdf124367.docx")
diff --git a/sw/source/filter/ww8/docxexport.cxx b/sw/source/filter/ww8/docxexport.cxx
index 526d100768c8..992a97d69103 100644
--- a/sw/source/filter/ww8/docxexport.cxx
+++ b/sw/source/filter/ww8/docxexport.cxx
@@ -34,6 +34,7 @@
 #include <com/sun/star/xml/sax/Writer.hpp>
 #include <com/sun/star/awt/XControlModel.hpp>
 #include <com/sun/star/sdb/CommandType.hpp>
+#include <com/sun/star/text/XTextFieldsSupplier.hpp>
 
 #include <oox/token/namespaces.hxx>
 #include <oox/token/tokens.hxx>
@@ -887,6 +888,58 @@ void DocxExport::WriteProperties( )
     m_pFilter->exportDocumentProperties( xDocProps, bSecurityOptOpenReadOnly );
 }
 
+void DocxExport::WriteDocVars(const sax_fastparser::FSHelperPtr& pFS)
+{
+    SwDocShell* pDocShell = m_pDoc->GetDocShell();
+    if (!pDocShell)
+    {
+        return;
+    }
+
+    uno::Reference<text::XTextFieldsSupplier> xModel(pDocShell->GetModel(), uno::UNO_QUERY);
+    uno::Reference<container::XNameAccess> xTextFieldMasters = xModel->getTextFieldMasters();
+    uno::Sequence<rtl::OUString> aMasterNames = xTextFieldMasters->getElementNames();
+    if (!aMasterNames.hasElements())
+    {
+        return;
+    }
+
+    // Only write docVars if there will be at least a single docVar.
+    bool bStarted = false;
+    const OUStringLiteral aPrefix("com.sun.star.text.fieldmaster.User.");
+    for (const auto& rMasterName : std::as_const(aMasterNames))
+    {
+        if (!rMasterName.startsWith(aPrefix))
+        {
+            // Not a user field.
+            continue;
+        }
+
+        uno::Reference<beans::XPropertySet> xField;
+        xTextFieldMasters->getByName(rMasterName) >>= xField;
+        if (!xField.is())
+        {
+            continue;
+        }
+
+        OUString aKey = rMasterName.copy(aPrefix.getLength());
+        OUString aValue;
+        xField->getPropertyValue("Content") >>= aValue;
+        if (!bStarted)
+        {
+            bStarted = true;
+            pFS->startElementNS(XML_w, XML_docVars);
+        }
+        pFS->singleElementNS(XML_w, XML_docVar, FSNS(XML_w, XML_name), aKey.toUtf8(),
+                             FSNS(XML_w, XML_val), aValue.toUtf8());
+    }
+
+    if (bStarted)
+    {
+        pFS->endElementNS(XML_w, XML_docVars);
+    }
+}
+
 void DocxExport::WriteSettings()
 {
     SwViewShell *pViewShell(m_pDoc->getIDocumentLayoutAccess().GetCurrentViewShell());
@@ -1151,6 +1204,8 @@ void DocxExport::WriteSettings()
         }
     }
 
+    WriteDocVars(pFS);
+
     // Protect form
     // Section-specific write protection
     if (! hasProtectionProperties)
diff --git a/sw/source/filter/ww8/docxexport.hxx b/sw/source/filter/ww8/docxexport.hxx
index 00b908dc7efa..f659cd1244f4 100644
--- a/sw/source/filter/ww8/docxexport.hxx
+++ b/sw/source/filter/ww8/docxexport.hxx
@@ -245,6 +245,9 @@ private:
     /// Write word/settings.xml
     void WriteSettings();
 
+    /// Writes the <w:docVars> part of settings.xml
+    void WriteDocVars(const sax_fastparser::FSHelperPtr& pFS);
+
     /// Write word/theme/theme1.xml
     void WriteTheme();