oox smartart, org chart: fix font color when defined with quick styles

createStyleMatrixContext() assumed that <dgm:style> contains
<dgm:fontRef>, but it contains <a:fontRef> instead.

This resulted in a 0 mnThemedIdx, which meant that since commit
89206c47 (bnc#862510: PPTX import: Wrong
text color inside shape, 2014-12-21) we ignored the theme color in
oox::drawingml::Shape::createAndInsert().

Change-Id: I81045fa58df5cb9e31a4ed3f1b1625224bcd06ad
Reviewed-on: https://gerrit.libreoffice.org/65938Reviewed-by: Miklos Vajna <vmiklos@collabora.com>
Tested-by: Jenkins

oox/source/drawingml/diagram/diagramfragmenthandler.cxx

@@ -111,7 +111,7 @@ DiagramQStylesFragmentHandler::DiagramQStylesFragmentHandler( XmlFilterBase& rFi
     const AttributeList& rAttribs,
     ShapeStyleRef& o_rStyle )
 {
-    o_rStyle.mnThemedIdx = (nElement == DGM_TOKEN(fontRef)) ?
+    o_rStyle.mnThemedIdx = (nElement == A_TOKEN(fontRef)) ?
         rAttribs.getToken( XML_idx, XML_none ) : rAttribs.getInteger( XML_idx, 0 );
     return new ColorContext( *this, o_rStyle.maPhClr );
 }

sd/qa/unit/import-tests-smartart.cxx

@@ -700,6 +700,17 @@ void SdImportTestSmartArt::testOrgChart()
     CPPUNIT_ASSERT(xManager.is());
     CPPUNIT_ASSERT_EQUAL(OUString("Manager"), xManager->getString());
 
+    uno::Reference<container::XEnumerationAccess> xParaEnumAccess(xManager, uno::UNO_QUERY);
+    uno::Reference<container::XEnumeration> xParaEnum = xParaEnumAccess->createEnumeration();
+    uno::Reference<text::XTextRange> xPara(xParaEnum->nextElement(), uno::UNO_QUERY);
+    uno::Reference<container::XEnumerationAccess> xRunEnumAccess(xPara, uno::UNO_QUERY);
+    uno::Reference<container::XEnumeration> xRunEnum = xRunEnumAccess->createEnumeration();
+    uno::Reference<beans::XPropertySet> xRun(xRunEnum->nextElement(), uno::UNO_QUERY);
+    sal_Int32 nActualColor = xRun->getPropertyValue("CharColor").get<sal_Int32>();
+    // Without the accompanying fix in place, this test would have failed: the
+    // "Manager" font color was black, not white.
+    CPPUNIT_ASSERT_EQUAL(static_cast<sal_Int32>(0xffffff), nActualColor);
+
     uno::Reference<drawing::XShape> xManagerShape(xManager, uno::UNO_QUERY);
     CPPUNIT_ASSERT(xManagerShape.is());