Related: tdf#93676 special 255 Percent Flag should not be exported to docx

as a true percentage value. 255 is a special flag that the value is synced to
the other dimension. Without this word gives the frame in the attached example
a huge height.

(cherry picked from commit b2ad33fd)

Change-Id: Ida0c15779d4583ca075428d77b8dc03c32f22edb
Reviewed-on: https://gerrit.libreoffice.org/18332Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>

sw/qa/extras/ooxmlexport/ooxmlexport6.cxx

@@ -912,6 +912,21 @@ DECLARE_OOXMLEXPORT_TEST(testExtentValue, "fdo74605.docx")
     assertXPath(pXmlDoc, "/w:document/w:body/w:p[2]/w:r[1]/mc:AlternateContent[1]/mc:Choice[1]/w:drawing[1]/wp:anchor[1]/wp:extent","cx","0");
 }
 
+// part of tdf#93676, word gives the frame in the exported .docx a huge height,
+// because its exported with 255% height percentage from a 255 HeightPercent
+// settings, but 255 is a special flag that the value is synced to the
+// other dimension.
+DECLARE_OOXMLEXPORT_TEST(testSyncedRelativePercent, "tdf93676-1.odt")
+{
+    xmlDocPtr pXmlDoc = parseExport("word/document.xml");
+    if (!pXmlDoc)
+        return;
+
+    // check no explicit pctHeight has been exported, all we care
+    // about at this point is that its not 255000
+    assertXPath(pXmlDoc, "//wp14:pctHeight", 0);
+}
+
 #endif
 
 CPPUNIT_PLUGIN_IMPLEMENT();

sw/source/filter/ww8/docxsdrexport.cxx

@@ -1594,23 +1594,25 @@ void DocxSdrExport::writeDMLTextFrame(sw::Frame* pParentFrame, int nAnchorId, bo
         pFS->endElementNS(XML_a, XML_graphic);
 
         // Relative size of the Text Frame.
-        if (rSize.GetWidthPercent())
+        const sal_uInt8 nWidthPercent = rSize.GetWidthPercent();
+        if (nWidthPercent && nWidthPercent != 0xff)
         {
             pFS->startElementNS(XML_wp14, XML_sizeRelH,
                                 XML_relativeFrom, (rSize.GetWidthPercentRelation() == text::RelOrientation::PAGE_FRAME ? "page" : "margin"),
                                 FSEND);
             pFS->startElementNS(XML_wp14, XML_pctWidth, FSEND);
-            pFS->writeEscaped(OUString::number(rSize.GetWidthPercent() * oox::drawingml::PER_PERCENT));
+            pFS->writeEscaped(OUString::number(nWidthPercent * oox::drawingml::PER_PERCENT));
             pFS->endElementNS(XML_wp14, XML_pctWidth);
             pFS->endElementNS(XML_wp14, XML_sizeRelH);
         }
-        if (rSize.GetHeightPercent())
+        const sal_uInt8 nHeightPercent = rSize.GetHeightPercent();
+        if (nHeightPercent && nHeightPercent != 0xff)
         {
             pFS->startElementNS(XML_wp14, XML_sizeRelV,
                                 XML_relativeFrom, (rSize.GetHeightPercentRelation() == text::RelOrientation::PAGE_FRAME ? "page" : "margin"),
                                 FSEND);
             pFS->startElementNS(XML_wp14, XML_pctHeight, FSEND);
-            pFS->writeEscaped(OUString::number(rSize.GetHeightPercent() * oox::drawingml::PER_PERCENT));
+            pFS->writeEscaped(OUString::number(nHeightPercent * oox::drawingml::PER_PERCENT));
             pFS->endElementNS(XML_wp14, XML_pctHeight);
             pFS->endElementNS(XML_wp14, XML_sizeRelV);
         }

sw/source/filter/ww8/rtfattributeoutput.cxx

@@ -1600,9 +1600,10 @@ void lcl_TextFrameRelativeSize(std::vector< std::pair<OString, OString> >& rFlyP
     const SwFormatFrmSize& rSize = rFrameFormat.GetFrmSize();
 
     // Relative size of the Text Frame.
-    if (rSize.GetWidthPercent())
+    const sal_uInt8 nWidthPercent = rSize.GetWidthPercent();
+    if (nWidthPercent && nWidthPercent != 0xff)
     {
-        rFlyProperties.push_back(std::make_pair<OString, OString>("pctHoriz", OString::number(rSize.GetWidthPercent() * 10)));
+        rFlyProperties.push_back(std::make_pair<OString, OString>("pctHoriz", OString::number(nWidthPercent * 10)));
 
         OString aRelation;
         switch (rSize.GetWidthPercentRelation())
@@ -1616,9 +1617,10 @@ void lcl_TextFrameRelativeSize(std::vector< std::pair<OString, OString> >& rFlyP
         }
         rFlyProperties.push_back(std::make_pair("sizerelh", aRelation));
     }
-    if (rSize.GetHeightPercent())
+    const sal_uInt8 nHeightPercent = rSize.GetHeightPercent();
+    if (nHeightPercent && nHeightPercent != 0xff)
     {
-        rFlyProperties.push_back(std::make_pair<OString, OString>("pctVert", OString::number(rSize.GetHeightPercent() * 10)));
+        rFlyProperties.push_back(std::make_pair<OString, OString>("pctVert", OString::number(nHeightPercent * 10)));
 
         OString aRelation;
         switch (rSize.GetHeightPercentRelation())