oox: import Math objects from PPTX files

This is quite hacky and limited: in OOXML these are not OLE objects but
occur inside text boxes, and PPT 2010 allows inserting multiple Math
objects into one text box but Impress does not have as-character
anchored objects, so we can't import that properly; for now only import
Math if there is nothing else in the text box.

Also for now only import them as children of TextParagraphContext (a:p);
it's not clear what the possible parent elements could be since the
OOXML standard only lists WordProcessingML parent elements :(

Change-Id: I847f810084c9ddae4b60f93896fb73a742683cc2

1 files changed, 24 insertions, 1 deletions

diff --git a/sd/qa/unit/export-tests.cxx b/sd/qa/unit/export-tests.cxx
index 818ea21afb80..2f9550afda5e 100644
--- a/sd/qa/unit/export-tests.cxx
+++ b/sd/qa/unit/export-tests.cxx
@@ -1173,7 +1173,30 @@ void SdExportTest::testMathObject()
             "/p:sld/p:cSld/p:spTree/mc:AlternateContent/mc:Choice/p:sp/p:txBody/a:p/a14:m/m:oMath/m:r[1]/m:t",
             "a");
 
-        // TODO can't import yet
+        const SdrPage *pPage = GetPage(1, xDocShRef);
+        const SdrObject* pObj = dynamic_cast<SdrObject*>(pPage->GetObj(0));
+        CPPUNIT_ASSERT_MESSAGE("no object", pObj != nullptr);
+        CPPUNIT_ASSERT_EQUAL(static_cast<sal_uInt16>(OBJ_OLE2), pObj->GetObjIdentifier());
+    }
+
+    utl::TempFile tempFile2;
+    xDocShRef = saveAndReload( xDocShRef, PPTX, &tempFile2 );
+
+    // Export an MS specific ole object (imported from a PPTX document)
+    {
+        xmlDocPtr pXmlDocContent = parseExport(tempFile1, "ppt/slides/slide1.xml");
+        assertXPath(pXmlDocContent,
+            "/p:sld/p:cSld/p:spTree/mc:AlternateContent/mc:Choice",
+            "Requires",
+            "a14");
+        assertXPathContent(pXmlDocContent,
+            "/p:sld/p:cSld/p:spTree/mc:AlternateContent/mc:Choice/p:sp/p:txBody/a:p/a14:m/m:oMath/m:r[1]/m:t",
+            "a");
+
+        const SdrPage *pPage = GetPage(1, xDocShRef);
+        const SdrObject* pObj = dynamic_cast<SdrObject*>(pPage->GetObj(0));
+        CPPUNIT_ASSERT_MESSAGE("no object", pObj != nullptr);
+        CPPUNIT_ASSERT_EQUAL(static_cast<sal_uInt16>(OBJ_OLE2), pObj->GetObjIdentifier());
     }
 
     xDocShRef->DoClose();