EPUB export: initial span support

Characters under <text:span> (and not only under <text:p>) are now
handled.

Change-Id: Iac353005423d65f446b9f93519957f4caeaf1c7a
Reviewed-on: https://gerrit.libreoffice.org/41164Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Jenkins <ci@libreoffice.org>

writerperfect/source/writer/exp/txtparai.cxx

@@ -18,13 +18,47 @@ namespace writerperfect
 namespace exp
 {
 
+/// Handler for <text:span>.
+class XMLSpanContext : public XMLImportContext
+{
+public:
+    XMLSpanContext(XMLImport &rImport);
+
+    void SAL_CALL startElement(const OUString &rName, const css::uno::Reference<css::xml::sax::XAttributeList> &xAttribs) override;
+    void SAL_CALL endElement(const OUString &rName) override;
+    void SAL_CALL characters(const OUString &rChars) override;
+};
+
+XMLSpanContext::XMLSpanContext(XMLImport &rImport)
+    : XMLImportContext(rImport)
+{
+}
+
+void XMLSpanContext::startElement(const OUString &/*rName*/, const css::uno::Reference<css::xml::sax::XAttributeList> &/*xAttribs*/)
+{
+    mrImport.GetGenerator().openSpan(librevenge::RVNGPropertyList());
+}
+
+void XMLSpanContext::endElement(const OUString &/*rName*/)
+{
+    mrImport.GetGenerator().closeSpan();
+}
+
+void XMLSpanContext::characters(const OUString &rChars)
+{
+    OString sCharU8 = OUStringToOString(rChars, RTL_TEXTENCODING_UTF8);
+    mrImport.GetGenerator().insertText(librevenge::RVNGString(sCharU8.getStr()));
+}
+
 XMLParaContext::XMLParaContext(XMLImport &rImport)
     : XMLImportContext(rImport)
 {
 }
 
-XMLImportContext *XMLParaContext::CreateChildContext(const OUString &/*rName*/, const css::uno::Reference<css::xml::sax::XAttributeList> &/*xAttribs*/)
+XMLImportContext *XMLParaContext::CreateChildContext(const OUString &rName, const css::uno::Reference<css::xml::sax::XAttributeList> &/*xAttribs*/)
 {
+    if (rName == "text:span")
+        return new XMLSpanContext(mrImport);
     return nullptr;
 }