avoid problems detecting HTML files with .xls ext.

Change-Id: I9955223aac20f3f640fde51bb7231666c269ca70

filter/Configuration_filter.mk

@@ -512,6 +512,7 @@ $(call filter_Configuration_add_ui_filters,fcfg_langpack,filter/source/config/fr
 $(call filter_Configuration_add_types,fcfg_langpack,fcfg_calc_types.xcu,filter/source/config/fragments/types,\
 	calc_DIF \
 	calc_ODS_FlatXML \
+	calc_HTML \
 	generic_HTML \
 	generic_Text \
 	calc_Lotus \

filter/source/config/fragments/types/calc_HTML.xcu

+<!--
+ * 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 .
+-->
+    <!-- A special case: There are tools that export HTML with .xls
+    extension. Allow to detect these early to avoid going through the
+    whole list of detectors. This also avoids the risk of misdetection
+    as something else, as there are some formats that are text files and
+    the detection is just a heuristic (e.g., wp1 or wp42 supported by
+    libwpd). -->
+    <node oor:name="calc_HTML" oor:op="replace" >
+        <prop oor:name="DetectService"><value>com.sun.star.comp.filters.PlainTextFilterDetect</value></prop>
+        <prop oor:name="URLPattern"/>
+        <prop oor:name="Extensions"><value>xls</value></prop>
+        <prop oor:name="MediaType"><value>text/html</value></prop>
+        <prop oor:name="Preferred"><value>false</value></prop>
+        <prop oor:name="PreferredFilter"/>
+        <prop oor:name="UIName">
+            <value>HTML Table</value>
+        </prop>
+        <prop oor:name="ClipboardFormat"/>
+    </node>

filter/source/textfilterdetect/filterdetect.cxx

@@ -132,7 +132,7 @@ OUString SAL_CALL PlainTextFilterDetect::detect(uno::Sequence<beans::PropertyVal
     OUString aExt = aParser.getExtension(INetURLObject::LAST_SEGMENT, true, INetURLObject::DECODE_WITH_CHARSET);
     aExt = aExt.toAsciiLowerCase();
 
-    if (aType == "generic_HTML")
+    if ((aType == "generic_HTML") || (aType == "calc_HTML"))
     {
         uno::Reference<io::XInputStream> xInStream(aMediaDesc[MediaDescriptor::PROP_INPUTSTREAM()], uno::UNO_QUERY);
         if (!xInStream.is() || !IsHTMLStream(xInStream))
@@ -141,12 +141,10 @@ OUString SAL_CALL PlainTextFilterDetect::detect(uno::Sequence<beans::PropertyVal
         // Decide which filter to use based on the document service first,
         // then on extension if that's not available.
 
-        if (aDocService == CALC_DOCSERVICE)
+        if ((aDocService == CALC_DOCSERVICE) || (aType == "calc_HTML"))
             aMediaDesc[MediaDescriptor::PROP_FILTERNAME()] <<= OUString(CALC_HTML_FILTER);
         else if (aDocService == WRITER_DOCSERVICE)
             aMediaDesc[MediaDescriptor::PROP_FILTERNAME()] <<= OUString(WRITER_HTML_FILTER);
-        else if (aExt == "xls")
-            aMediaDesc[MediaDescriptor::PROP_FILTERNAME()] <<= OUString(CALC_HTML_FILTER);
         else
             aMediaDesc[MediaDescriptor::PROP_FILTERNAME()] <<= OUString(WEB_HTML_FILTER);
     }