allow to build with released libepubgen

Change-Id: I12d297e8a3e57a3b24d85e4c537996cad0106125

config_host/config_libepubgen.h.in

+/* -*- 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/.
+ */
+
+/* Configuration for libepubgen.
+ */
+
+// Defined if libepubgen supports setting EPUB version (devel. only)
+#undef LIBEPUBGEN_VERSION_SUPPORT
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */

configure.ac

@@ -7724,6 +7724,24 @@ libo_CHECK_SYSTEM_MODULE([librevenge],[REVENGE],[librevenge-0.0 >= 0.0.1],["-I${
 libo_CHECK_SYSTEM_MODULE([libodfgen],[ODFGEN],[libodfgen-0.1])
 
 libo_CHECK_SYSTEM_MODULE([libepubgen],[EPUBGEN],[libepubgen-0.0])
+AS_IF([test "$SYSTEM_EPUBGEN" = "TRUE"], [
+    AC_MSG_CHECKING([whether libepubgen supports setting EPUB version])
+    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
+            #include <libepubgen/libepubgen.h>
+        ], [
+            const libepubgen::EPUBTextGenerator generator(nullptr, EPUB_SPLIT_METHOD_NONE, 30);
+        ])],
+        [
+            AC_MSG_RESULT([yes])
+            AC_DEFINE([LIBEPUBGEN_VERSION_SUPPORT])
+        ],
+        [
+            AC_MSG_RESULT([no])
+        ]
+    )
+], [
+    AC_DEFINE([LIBEPUBGEN_VERSION_SUPPORT])
+])
 
 AS_IF([test "$COM" = "MSC"],
       [libwpd_libdir="${WORKDIR}/LinkTarget/Library"],
@@ -12414,6 +12432,7 @@ AC_CONFIG_HEADERS([config_host/config_gio.h])
 AC_CONFIG_HEADERS([config_host/config_global.h])
 AC_CONFIG_HEADERS([config_host/config_java.h])
 AC_CONFIG_HEADERS([config_host/config_lgpl.h])
+AC_CONFIG_HEADERS([config_host/config_libepubgen.h])
 AC_CONFIG_HEADERS([config_host/config_liblangtag.h])
 AC_CONFIG_HEADERS([config_host/config_locales.h])
 AC_CONFIG_HEADERS([config_host/config_mpl.h])

writerperfect/source/writer/EPUBExportFilter.cxx

@@ -7,6 +7,8 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  */
 
+#include "config_libepubgen.h"
+
 #include "EPUBExportFilter.hxx"
 
 #include <libepubgen/EPUBTextGenerator.h>
@@ -36,7 +38,11 @@ sal_Bool EPUBExportFilter::filter(const uno::Sequence<beans::PropertyValue> &rDe
     // file, the flat ODF filter has access to the doc model, everything else
     // is in-between.
     EPUBPackage aPackage(mxContext, rDescriptor);
-    libepubgen::EPUBTextGenerator aGenerator(&aPackage, libepubgen::EPUB_SPLIT_METHOD_HEADING, /*version=*/30);
+    libepubgen::EPUBTextGenerator aGenerator(&aPackage, libepubgen::EPUB_SPLIT_METHOD_HEADING
+#if defined(LIBEPUBGEN_VERSION_SUPPORT)
+                                             , /*version=*/30
+#endif
+                                            );
     uno::Reference<xml::sax::XDocumentHandler> xExportHandler(new exp::XMLImport(aGenerator));
 
     uno::Reference<lang::XInitialization> xInitialization(mxContext->getServiceManager()->createInstanceWithContext("com.sun.star.comp.Writer.XMLOasisExporter", mxContext), uno::UNO_QUERY);