EPUB export: allow setting a custom cover image explicitly

If not set, fall back to the existing auto-find.

Change-Id: I5df7a535e4132a18a803c10fa0e06352d9b6b533

writerperfect/qa/unit/EPUBExportTest.cxx

@@ -61,6 +61,7 @@ public:
     void testSpanAutostyle();
     void testParaAutostyleCharProps();
     void testMeta();
+    void testCoverImage();
     void testParaNamedstyle();
     void testCharNamedstyle();
     void testNamedStyleInheritance();
@@ -93,6 +94,7 @@ public:
     CPPUNIT_TEST(testSpanAutostyle);
     CPPUNIT_TEST(testParaAutostyleCharProps);
     CPPUNIT_TEST(testMeta);
+    CPPUNIT_TEST(testCoverImage);
     CPPUNIT_TEST(testParaNamedstyle);
     CPPUNIT_TEST(testCharNamedstyle);
     CPPUNIT_TEST(testNamedStyleInheritance);
@@ -333,6 +335,23 @@ void EPUBExportTest::testMeta()
     CPPUNIT_ASSERT(mxZipFile->hasByName("OEBPS/images/image0001.png"));
 }
 
+void EPUBExportTest::testCoverImage()
+{
+    OUString aCoverURL = m_directories.getURLFromSrc(DATA_DIRECTORY) + "meta.cover-image.png";
+    uno::Sequence<beans::PropertyValue> aFilterData(comphelper::InitPropertySequence(
+    {
+        {"EPUBCoverImage", uno::makeAny(aCoverURL)}
+    }));
+    createDoc("hello.fodt", aFilterData);
+    mpXmlDoc = parseExport("OEBPS/content.opf");
+
+    // Make sure that the explicitly set cover image is used.
+    // This failed, as the image was not part of the package.
+    assertXPath(mpXmlDoc, "/opf:package/opf:manifest/opf:item[@href='images/image0001.png']", "properties", "cover-image");
+    assertXPath(mpXmlDoc, "/opf:package/opf:manifest/opf:item[@href='images/image0001.png']", "media-type", "image/png");
+    CPPUNIT_ASSERT(mxZipFile->hasByName("OEBPS/images/image0001.png"));
+}
+
 void EPUBExportTest::testParaNamedstyle()
 {
     createDoc("para-namedstyle.fodt", {});

writerperfect/source/writer/exp/xmlimp.cxx

@@ -46,10 +46,38 @@ OUString GetMimeType(const OUString &rExtension)
 }
 
 /// Picks up a cover image from the base directory.
-OUString FindCoverImage(const OUString &rDocumentBaseURL, OUString &rMimeType)
+OUString FindCoverImage(const OUString &rDocumentBaseURL, OUString &rMimeType, const uno::Sequence<beans::PropertyValue> &rDescriptor)
 {
     OUString aRet;
 
+    // See if filter data contains a cover image explicitly.
+    uno::Sequence<beans::PropertyValue> aFilterData;
+    for (sal_Int32 i = 0; i < rDescriptor.getLength(); ++i)
+    {
+        if (rDescriptor[i].Name == "FilterData")
+        {
+            rDescriptor[i].Value >>= aFilterData;
+            break;
+        }
+    }
+
+    for (sal_Int32 i = 0; i < aFilterData.getLength(); ++i)
+    {
+        if (aFilterData[i].Name == "EPUBCoverImage")
+        {
+            aFilterData[i].Value >>= aRet;
+            break;
+        }
+    }
+
+    if (!aRet.isEmpty())
+    {
+        INetURLObject aRetURL(aRet);
+        rMimeType = GetMimeType(aRetURL.GetExtension());
+        return aRet;
+    }
+
+    // Not set explicitly, try to pick it up from the base directory.
     if (rDocumentBaseURL.isEmpty())
         return aRet;
 
@@ -142,11 +170,11 @@ rtl::Reference<XMLImportContext> XMLOfficeDocContext::CreateChildContext(const O
     return nullptr;
 }
 
-XMLImport::XMLImport(librevenge::RVNGTextInterface &rGenerator, const OUString &rURL, const uno::Sequence<beans::PropertyValue> &/*rDescriptor*/)
+XMLImport::XMLImport(librevenge::RVNGTextInterface &rGenerator, const OUString &rURL, const uno::Sequence<beans::PropertyValue> &rDescriptor)
     : mrGenerator(rGenerator)
 {
     OUString aMimeType;
-    OUString aCoverImage = FindCoverImage(rURL, aMimeType);
+    OUString aCoverImage = FindCoverImage(rURL, aMimeType, rDescriptor);
     if (!aCoverImage.isEmpty())
     {
         librevenge::RVNGBinaryData aBinaryData;