EPUB export: handle text properties from paragraph styles

Same as previous EPUB commit, but this time for text properties, not
paragraph ones.

Change-Id: I46d59d92028cf4155bfbbf68805a1b6c259e81e2
Reviewed-on: https://gerrit.libreoffice.org/41945Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Jenkins <ci@libreoffice.org>

writerperfect/qa/unit/EPUBExportTest.cxx

@@ -225,6 +225,11 @@ void EPUBExportTest::testParaNamedstyle()
     assertXPath(mpXmlDoc, "//xhtml:p[1]", "class", "para0");
     // This failed, paragraph properties from style were not exported.
     assertXPath(mpXmlDoc, "//xhtml:p[2]", "class", "para1");
+
+    // Test character properties from named paragraph style.
+    assertXPath(mpXmlDoc, "//xhtml:p[1]/xhtml:span", "class", "span0");
+    // This failed, character properties from paragraph style were not exported.
+    assertXPath(mpXmlDoc, "//xhtml:p[2]/xhtml:span", "class", "span1");
 }
 
 CPPUNIT_TEST_SUITE_REGISTRATION(EPUBExportTest);

writerperfect/source/writer/exp/txtparai.cxx

@@ -204,6 +204,17 @@ void XMLParaContext::characters(const OUString &rChars)
             for (itProp.rewind(); itProp.next();)
                 aPropertyList.insert(itProp.key(), itProp()->clone());
         }
+        else
+        {
+            itStyle = mrImport.GetTextStyles().find(m_aStyleName);
+            if (itStyle != mrImport.GetTextStyles().end())
+            {
+                // Found a named text style.
+                librevenge::RVNGPropertyList::Iter itProp(itStyle->second);
+                for (itProp.rewind(); itProp.next();)
+                    aPropertyList.insert(itProp.key(), itProp()->clone());
+            }
+        }
     }
     mrImport.GetGenerator().openSpan(aPropertyList);