tdf#119785 Implement the EMF TA_RTLREADING alignment flag

EMF has two ways to indicate that text should be treated as RTL:

- The ExtTextOut ETO_RTLREADING flag
- The SetTextAlign TA_RTLREADING flag

Previously, only the former was implemented. This change implements the
latter.

Change-Id: If1023b4a0a3b6eb2ce47d2b764edbfd1a5c0dd5a
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/173579
Reviewed-by: Jonathan Clark <jonathan@libreoffice.org>
Tested-by: Jenkins

4 files changed, 34 insertions, 0 deletions

diff --git a/drawinglayer/source/tools/primitive2dxmldump.cxx b/drawinglayer/source/tools/primitive2dxmldump.cxx
index 61c9f5ca447a..91567d8aabac 100644
--- a/drawinglayer/source/tools/primitive2dxmldump.cxx
+++ b/drawinglayer/source/tools/primitive2dxmldump.cxx
@@ -930,6 +930,12 @@ void Primitive2dXmlDump::decomposeAndWrite(
                 const drawinglayer::attribute::FontAttribute& aFontAttribute
                     = rTextSimplePortionPrimitive2D.getFontAttribute();
                 rWriter.attribute("familyname", aFontAttribute.getFamilyName());
+
+                if (aFontAttribute.getRTL())
+                {
+                    rWriter.attribute("rtl", std::u16string_view{ u"true" });
+                }
+
                 const std::vector<double> aDx = rTextSimplePortionPrimitive2D.getDXArray();
                 if (aDx.size())
                 {
diff --git a/emfio/qa/cppunit/emf/EmfImportTest.cxx b/emfio/qa/cppunit/emf/EmfImportTest.cxx
index 71ae6b80fbee..2d88b0345924 100644
--- a/emfio/qa/cppunit/emf/EmfImportTest.cxx
+++ b/emfio/qa/cppunit/emf/EmfImportTest.cxx
@@ -1855,6 +1855,21 @@ CPPUNIT_TEST_FIXTURE(Test, testPdfInEmf)
                          aBitmapEx.GetAlpha(size.Width() / 2, size.Height() / 2));
 }
 
+CPPUNIT_TEST_FIXTURE(Test, testAlignRtlReading)
+{
+    // EMF file with the TA_RTLREADING alignment flag
+    Primitive2DSequence aSequence = parseEmf(u"/emfio/qa/cppunit/emf/data/TestAlignRtlReading.emf");
+    CPPUNIT_ASSERT_EQUAL(1, static_cast<int>(aSequence.getLength()));
+    drawinglayer::Primitive2dXmlDump dumper;
+    xmlDocUniquePtr pDocument = dumper.dumpAndParse(Primitive2DContainer(aSequence));
+    CPPUNIT_ASSERT(pDocument);
+
+    assertXPath(pDocument, aXPathPrefix + "mask/textsimpleportion", 4);
+    assertXPath(pDocument, aXPathPrefix + "mask/textsimpleportion[1]", "rtl"_ostr, u"true"_ustr);
+    assertXPathNoAttribute(pDocument, aXPathPrefix + "mask/textsimpleportion[2]", "rtl"_ostr);
+    assertXPath(pDocument, aXPathPrefix + "mask/textsimpleportion[3]", "rtl"_ostr, u"true"_ustr);
+}
+
 CPPUNIT_PLUGIN_IMPLEMENT();
 
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/emfio/qa/cppunit/emf/data/TestAlignRtlReading.emf b/emfio/qa/cppunit/emf/data/TestAlignRtlReading.emf
new file mode 100644
index 000000000000..70d9db6cd720
--- /dev/null
+++ b/emfio/qa/cppunit/emf/data/TestAlignRtlReading.emf
diff --git a/emfio/source/reader/mtftools.cxx b/emfio/source/reader/mtftools.cxx
index 57a915e6250f..f12e6e92b17d 100644
--- a/emfio/source/reader/mtftools.cxx
+++ b/emfio/source/reader/mtftools.cxx
@@ -1712,6 +1712,19 @@ namespace emfio
         if ( mnLatestTextAlign != mnTextAlign )
         {
             bChangeFont = true;
+
+            if ((mnLatestTextAlign & TA_RTLREADING) != (mnTextAlign & TA_RTLREADING))
+            {
+                auto nFlags = vcl::text::ComplexTextLayoutFlags::Default;
+                if (mnTextAlign & TA_RTLREADING)
+                {
+                    nFlags = vcl::text::ComplexTextLayoutFlags::BiDiRtl
+                             | vcl::text::ComplexTextLayoutFlags::TextOriginLeft;
+                }
+
+                mpGDIMetaFile->AddAction(new MetaLayoutModeAction(nFlags));
+            }
+
             mnLatestTextAlign = mnTextAlign;
             mpGDIMetaFile->AddAction( new MetaTextAlignAction( eTextAlign ) );
         }