XmlFilterAdaptor: use the fastparser API when possible

part of the process of making SvXMLImport fastparser-only

Which uncovered several bugs because I end up stacking fast and
slow parsers, not once, but twice.

Specifically, we have a problem here with default namespaces e.g.

    <math xmlns="http://www.w3.org/1998/Math/MathML" display="block">
    <semantics><mrow><mstyle mathsize="12pt">

where going from slow- to fast- parser loses this information,
because there is no way to represent this in the fastparser world,
so we end up with nastiness when we transition back to slow-parser,
and then back-again to fast-parser.

So I fixed a couple of places XMLEmbeddedObjectImportContext
and in SvXMLLegacyToFastDocHandler, and then worked around some of
it by introducing an new XImporter2 interface so I could strip out
out one of the slowparser -> fastparser transitions.

Change-Id: I491487b99271898da50dc999d3b9b9c39cbd97fd
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/104514
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

2 files changed, 72 insertions, 0 deletions

diff --git a/offapi/UnoApi_offapi.mk b/offapi/UnoApi_offapi.mk
index 0eaefbcca348..8d6e21d00a9b 100644
--- a/offapi/UnoApi_offapi.mk
+++ b/offapi/UnoApi_offapi.mk
@@ -4245,6 +4245,7 @@ $(eval $(call gb_UnoApi_add_idlfiles,offapi,com/sun/star/xml,\
 	FastAttribute \
 	XExportFilter \
 	XImportFilter \
+	XImportFilter2 \
 ))
 $(eval $(call gb_UnoApi_add_idlfiles,offapi,com/sun/star/xml/crypto,\
 	CipherID \
diff --git a/offapi/com/sun/star/xml/XImportFilter2.idl b/offapi/com/sun/star/xml/XImportFilter2.idl
new file mode 100644
index 000000000000..9c3f6bd56f7d
--- /dev/null
+++ b/offapi/com/sun/star/xml/XImportFilter2.idl
@@ -0,0 +1,71 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#ifndef _COM_SUN_STAR_XML_XIMPORTFILTER2_IDL__
+#define _COM_SUN_STAR_XML_XIMPORTFILTER2_IDL__
+
+#include <com/sun/star/uno/RuntimeException.idl>
+#include <com/sun/star/uno/XInterface.idl>
+#include <com/sun/star/beans/PropertyValue.idl>
+#include <com/sun/star/xml/sax/XFastParser.idl>
+#include <com/sun/star/lang/IllegalArgumentException.idl>
+
+
+module com { module sun { module star { module xml {
+
+
+
+/** interface to implement for an XML-based import filter.
+    Enhanced vs XImportFilter to take a XFastDocumentHandler.
+
+    @since LibreOffice 7.1
+ */
+interface XImportFilter2: com::sun::star::uno::XInterface
+{
+     /** performs the import.
+
+         <p>The source data (location indicated by <var>aSourceData</var>),
+            and the XML representation of the document must be generated by calls
+            to xocHandler (???) methods.
+
+      @param aSourceData
+          com::sun::star::document::MediaDescriptor
+          which defines the data source
+
+      @param msUserData
+          Sequence of strings which contains the user data defined in the
+          TypeDetection.xml
+
+      @param xFastParser
+          the fast parser for the XML document, i.e. an SvXMLImport subclass
+
+      @returns
+          `TRUE` if import process is successful
+     */
+    boolean importer(
+             [in] sequence< com::sun::star::beans::PropertyValue > aSourceData,
+             [in] com::sun::star::xml::sax::XFastParser xFastParser,
+             [in] sequence< string > msUserData )
+        raises( com::sun::star::lang::IllegalArgumentException );
+};
+
+}; }; }; };
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */