DOCX export: handle conditional fields

At least the subset where the condition syntax matches between Writer
and Word.

Change-Id: I107f2b4caeda6f7777696af8d5c5b455854cfa92
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/105798
Tested-by: Jenkins
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>

3 files changed, 44 insertions, 1 deletions

diff --git a/sw/qa/extras/ooxmlexport/data/conditional-text.fodt b/sw/qa/extras/ooxmlexport/data/conditional-text.fodt
new file mode 100644
index 000000000000..296c1c4ecc4d
--- /dev/null
+++ b/sw/qa/extras/ooxmlexport/data/conditional-text.fodt
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<office:document xmlns:text="urn:oasis:names:tc:opendocument:xmlns:text:1.0" xmlns:office="urn:oasis:names:tc:opendocument:xmlns:office:1.0" xmlns:ooow="http://openoffice.org/2004/writer" office:mimetype="application/vnd.oasis.opendocument.text">
+ <office:body>
+  <office:text>
+   <text:p><text:conditional-text text:condition="ooow:1 &lt; 2" text:string-value-if-true="True" text:string-value-if-false="False">True</text:conditional-text></text:p>
+  </office:text>
+ </office:body>
+</office:document>
diff --git a/sw/qa/extras/ooxmlexport/ooxmlfieldexport.cxx b/sw/qa/extras/ooxmlexport/ooxmlfieldexport.cxx
index eaf33fdda6b0..1a94982df7e9 100644
--- a/sw/qa/extras/ooxmlexport/ooxmlfieldexport.cxx
+++ b/sw/qa/extras/ooxmlexport/ooxmlfieldexport.cxx
@@ -663,6 +663,19 @@ DECLARE_OOXMLEXPORT_EXPORTONLY_TEST(testTdf132185, "tdf132185.docx")
     assertXPathContent(pXmlDoc, "/w:ftr/w:p/w:r[2]/w:instrText", " PAGE \\* roman ");
 }
 
+DECLARE_OOXMLEXPORT_EXPORTONLY_TEST(testConditionalText, "conditional-text.fodt")
+{
+    // Load a document which has a conditional text field in it.
+    xmlDocUniquePtr pXmlDoc = parseExport("word/document.xml");
+    std::u16string_view aExpected(u" IF 1 < 2 \"True\" \"False\"");
+
+    // Without the accompanying fix in place, this test would have failed with:
+    // - Expression: xmlXPathNodeSetGetLength(pXmlNodes) > 0
+    // - In <...>, XPath '/w:document/w:body/w:p/w:r[2]/w:instrText' not found
+    // i.e. the field was lost on export.
+    assertXPathContent(pXmlDoc, "/w:document/w:body/w:p/w:r[2]/w:instrText", aExpected);
+}
+
 CPPUNIT_PLUGIN_IMPLEMENT();
 
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/sw/source/filter/ww8/docxattributeoutput.cxx b/sw/source/filter/ww8/docxattributeoutput.cxx
index c2eeeec1bee6..99cd7eabd6c4 100644
--- a/sw/source/filter/ww8/docxattributeoutput.cxx
+++ b/sw/source/filter/ww8/docxattributeoutput.cxx
@@ -7881,8 +7881,30 @@ void DocxAttributeOutput::RefField( const SwField&  rField, const OUString& rRef
     // There is nothing to do here for the set fields
 }
 
-void DocxAttributeOutput::HiddenField( const SwField& /*rField*/ )
+void DocxAttributeOutput::HiddenField(const SwField& rField)
 {
+    auto eSubType = static_cast<SwFieldTypesEnum>(rField.GetSubType());
+    if (eSubType == SwFieldTypesEnum::ConditionalText)
+    {
+        OUString aCond = rField.GetPar1();
+        OUString aTrueFalse = rField.GetPar2();
+        sal_Int32 nPos = aTrueFalse.indexOf('|');
+        OUString aTrue;
+        OUString aFalse;
+        if (nPos == -1)
+        {
+            aTrue = aTrueFalse;
+        }
+        else
+        {
+            aTrue = aTrueFalse.subView(0, nPos);
+            aFalse = aTrueFalse.subView(nPos + 1);
+        }
+        OUString aCmd = FieldString(ww::eIF) + aCond + " \"" + aTrue + "\" \"" + aFalse + "\"";
+        m_rExport.OutputField(&rField, ww::eIF, aCmd);
+        return;
+    }
+
     SAL_INFO("sw.ww8", "TODO DocxAttributeOutput::HiddenField()" );
 }