EPUB export allow requesting fixed layout from cmdline

FilterData is a typed map of options, suitable for UNO API clients, also
that's what the UI uses. OTOH the --convert-to cmdline option can only
set a FilterOptions string, so support that way as well.

--convert-to epub:EPUB:layout=fixed

can be used to trigger this.

Change-Id: I9f429107ae1db3dc4b6ab3b2b75665f096a1a33a
Reviewed-on: https://gerrit.libreoffice.org/45646Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>

writerperfect/qa/unit/EPUBExportTest.cxx

@@ -42,6 +42,7 @@ class EPUBExportTest : public test::BootstrapFixture, public unotest::MacrosTest
     utl::TempFile maTempFile;
     xmlDocPtr mpXmlDoc = nullptr;
     uno::Reference<packages::zip::XZipFileAccess2> mxZipFile;
+    OUString maFilterOptions;
 
 public:
     void setUp() override;
@@ -58,6 +59,7 @@ public:
     void testMimetype();
     void testEPUB2();
     void testEPUBFixedLayout();
+    void testEPUBFixedLayoutOption();
     void testPageBreakSplit();
     void testSpanAutostyle();
     void testParaAutostyleCharProps();
@@ -99,6 +101,7 @@ public:
     CPPUNIT_TEST(testMimetype);
     CPPUNIT_TEST(testEPUB2);
     CPPUNIT_TEST(testEPUBFixedLayout);
+    CPPUNIT_TEST(testEPUBFixedLayoutOption);
     CPPUNIT_TEST(testPageBreakSplit);
     CPPUNIT_TEST(testSpanAutostyle);
     CPPUNIT_TEST(testParaAutostyleCharProps);
@@ -177,7 +180,10 @@ void EPUBExportTest::createDoc(const OUString &rFile, const uno::Sequence<beans:
     maTempFile.EnableKillingFile();
     utl::MediaDescriptor aMediaDescriptor;
     aMediaDescriptor["FilterName"] <<= OUString("EPUB");
-    aMediaDescriptor["FilterData"] <<= rFilterData;
+    if (maFilterOptions.isEmpty())
+        aMediaDescriptor["FilterData"] <<= rFilterData;
+    else
+        aMediaDescriptor["FilterOptions"] <<= maFilterOptions;
     xStorable->storeToURL(maTempFile.GetURL(), aMediaDescriptor.getAsConstPropertyValueList());
     mxZipFile = packages::zip::ZipFileAccess::createWithURL(mxComponentContext, maTempFile.GetURL());
 }
@@ -310,6 +316,17 @@ void EPUBExportTest::testEPUBFixedLayout()
     assertXPathContent(mpXmlDoc, "/opf:package/opf:metadata/opf:meta[@property='rendition:layout']", "pre-paginated");
 }
 
+void EPUBExportTest::testEPUBFixedLayoutOption()
+{
+    // Explicitly request fixed layout, this time via FilterOptions.
+    maFilterOptions = "layout=fixed";
+    createDoc("hello.fodt", {});
+
+    // This failed, fixed layout was only working via the FilterData map.
+    mpXmlDoc = parseExport("OEBPS/content.opf");
+    assertXPathContent(mpXmlDoc, "/opf:package/opf:metadata/opf:meta[@property='rendition:layout']", "pre-paginated");
+}
+
 void EPUBExportTest::testPageBreakSplit()
 {
     uno::Sequence<beans::PropertyValue> aFilterData(comphelper::InitPropertySequence(

writerperfect/source/writer/EPUBExportFilter.cxx

@@ -63,15 +63,20 @@ sal_Bool EPUBExportFilter::filter(const uno::Sequence<beans::PropertyValue> &rDe
     sal_Int32 nSplitMethod = EPUBExportFilter::GetDefaultSplitMethod();
     sal_Int32 nLayoutMethod = EPUBExportFilter::GetDefaultLayoutMethod();
     uno::Sequence<beans::PropertyValue> aFilterData;
+    OUString aFilterOptions;
     for (sal_Int32 i = 0; i < rDescriptor.getLength(); ++i)
     {
         if (rDescriptor[i].Name == "FilterData")
-        {
             rDescriptor[i].Value >>= aFilterData;
-            break;
-        }
+        else if (rDescriptor[i].Name == "FilterOptions")
+            rDescriptor[i].Value >>= aFilterOptions;
     }
 
+#if LIBEPUBGEN_VERSION_SUPPORT
+    if (aFilterOptions == "layout=fixed")
+        nLayoutMethod = libepubgen::EPUB_LAYOUT_METHOD_FIXED;
+#endif
+
     for (sal_Int32 i = 0; i < aFilterData.getLength(); ++i)
     {
         if (aFilterData[i].Name == "EPUBVersion")