EPUB export: write styles inline to please poor readers

And add a filter option to disable the new behavior, if wanted.

Change-Id: Ib70f60fc38d02c959452882bf593cd498b642fba
Reviewed-on: https://gerrit.libreoffice.org/42433Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Jenkins <ci@libreoffice.org>

writerperfect/qa/unit/EPUBExportTest.cxx

@@ -236,7 +236,12 @@ void EPUBExportTest::testPageBreakSplit()
 
 void EPUBExportTest::testSpanAutostyle()
 {
-    createDoc("span-autostyle.fodt", {});
+    uno::Sequence<beans::PropertyValue> aFilterData(comphelper::InitPropertySequence(
+    {
+        // Explicitly request in-CSS styles.
+        {"EPUBStylesMethod", uno::makeAny(static_cast<sal_Int32>(0))}
+    }));
+    createDoc("span-autostyle.fodt", aFilterData);
 
     mpXmlDoc = parseExport("OEBPS/sections/section0001.xhtml");
     assertXPath(mpXmlDoc, "//xhtml:p/xhtml:span[1]", "class", "span0");
@@ -248,7 +253,12 @@ void EPUBExportTest::testSpanAutostyle()
 
 void EPUBExportTest::testParaAutostyleCharProps()
 {
-    createDoc("para-autostyle-char-props.fodt", {});
+    uno::Sequence<beans::PropertyValue> aFilterData(comphelper::InitPropertySequence(
+    {
+        // Explicitly request in-CSS styles.
+        {"EPUBStylesMethod", uno::makeAny(static_cast<sal_Int32>(0))}
+    }));
+    createDoc("para-autostyle-char-props.fodt", aFilterData);
 
     mpXmlDoc = parseExport("OEBPS/sections/section0001.xhtml");
     // This failed, para-level char props were not exported.
@@ -268,7 +278,12 @@ void EPUBExportTest::testMeta()
 
 void EPUBExportTest::testParaNamedstyle()
 {
-    createDoc("para-namedstyle.fodt", {});
+    uno::Sequence<beans::PropertyValue> aFilterData(comphelper::InitPropertySequence(
+    {
+        // Explicitly request in-CSS styles.
+        {"EPUBStylesMethod", uno::makeAny(static_cast<sal_Int32>(0))}
+    }));
+    createDoc("para-namedstyle.fodt", aFilterData);
 
     mpXmlDoc = parseExport("OEBPS/sections/section0001.xhtml");
     assertXPath(mpXmlDoc, "//xhtml:p[1]", "class", "para0");
@@ -283,7 +298,12 @@ void EPUBExportTest::testParaNamedstyle()
 
 void EPUBExportTest::testCharNamedstyle()
 {
-    createDoc("char-namedstyle.fodt", {});
+    uno::Sequence<beans::PropertyValue> aFilterData(comphelper::InitPropertySequence(
+    {
+        // Explicitly request in-CSS styles.
+        {"EPUBStylesMethod", uno::makeAny(static_cast<sal_Int32>(0))}
+    }));
+    createDoc("char-namedstyle.fodt", aFilterData);
 
     mpXmlDoc = parseExport("OEBPS/sections/section0001.xhtml");
 
@@ -295,7 +315,12 @@ void EPUBExportTest::testCharNamedstyle()
 
 void EPUBExportTest::testNamedStyleInheritance()
 {
-    createDoc("named-style-inheritance.fodt", {});
+    uno::Sequence<beans::PropertyValue> aFilterData(comphelper::InitPropertySequence(
+    {
+        // Explicitly request in-CSS styles.
+        {"EPUBStylesMethod", uno::makeAny(static_cast<sal_Int32>(0))}
+    }));
+    createDoc("named-style-inheritance.fodt", aFilterData);
 
     // Find the CSS rule for the blue text.
     mpXmlDoc = parseExport("OEBPS/sections/section0001.xhtml");
@@ -311,7 +336,12 @@ void EPUBExportTest::testNamedStyleInheritance()
 
 void EPUBExportTest::testNestedSpan()
 {
-    createDoc("nested-span.fodt", {});
+    uno::Sequence<beans::PropertyValue> aFilterData(comphelper::InitPropertySequence(
+    {
+        // Explicitly request in-CSS styles.
+        {"EPUBStylesMethod", uno::makeAny(static_cast<sal_Int32>(0))}
+    }));
+    createDoc("nested-span.fodt", aFilterData);
 
     // Check textural content of nested span.
     mpXmlDoc = parseExport("OEBPS/sections/section0001.xhtml");
@@ -353,7 +383,12 @@ void EPUBExportTest::testEscape()
 
 void EPUBExportTest::testParaCharProps()
 {
-    createDoc("para-char-props.fodt", {});
+    uno::Sequence<beans::PropertyValue> aFilterData(comphelper::InitPropertySequence(
+    {
+        // Explicitly request in-CSS styles.
+        {"EPUBStylesMethod", uno::makeAny(static_cast<sal_Int32>(0))}
+    }));
+    createDoc("para-char-props.fodt", aFilterData);
 
     mpXmlDoc = parseExport("OEBPS/sections/section0001.xhtml");
     // Check formatting of the middle span.

writerperfect/source/writer/EPUBExportFilter.cxx

@@ -43,10 +43,16 @@ sal_Int32 EPUBExportFilter::GetDefaultSplitMethod()
     return libepubgen::EPUB_SPLIT_METHOD_HEADING;
 }
 
+sal_Int32 EPUBExportFilter::GetDefaultStylesMethod()
+{
+    return libepubgen::EPUB_STYLES_METHOD_INLINE;
+}
+
 sal_Bool EPUBExportFilter::filter(const uno::Sequence<beans::PropertyValue> &rDescriptor)
 {
     sal_Int32 nVersion = EPUBExportFilter::GetDefaultVersion();
     sal_Int32 nSplitMethod = EPUBExportFilter::GetDefaultSplitMethod();
+    sal_Int32 nStylesMethod = EPUBExportFilter::GetDefaultStylesMethod();
     uno::Sequence<beans::PropertyValue> aFilterData;
     for (sal_Int32 i = 0; i < rDescriptor.getLength(); ++i)
     {
@@ -63,6 +69,8 @@ sal_Bool EPUBExportFilter::filter(const uno::Sequence<beans::PropertyValue> &rDe
             aFilterData[i].Value >>= nVersion;
         else if (aFilterData[i].Name == "EPUBSplitMethod")
             aFilterData[i].Value >>= nSplitMethod;
+        else if (aFilterData[i].Name == "EPUBStylesMethod")
+            aFilterData[i].Value >>= nStylesMethod;
     }
 
     // Build the export filter chain: the package has direct access to the ZIP
@@ -74,6 +82,9 @@ sal_Bool EPUBExportFilter::filter(const uno::Sequence<beans::PropertyValue> &rDe
                                              , nVersion
 #endif
                                             );
+#if LIBEPUBGEN_VERSION_SUPPORT
+    aGenerator.setStylesMethod(static_cast<libepubgen::EPUBStylesMethod>(nStylesMethod));
+#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);

writerperfect/source/writer/EPUBExportFilter.hxx

@@ -50,6 +50,8 @@ public:
     static sal_Int32 GetDefaultVersion();
     /// Gives the default split method.
     static sal_Int32 GetDefaultSplitMethod();
+    /// Gives the default styles method.
+    static sal_Int32 GetDefaultStylesMethod();
 };
 
 } // namespace writerperfect