oox: add PPTX import/export for semi-transparent shape text

And start a drawingml test suite in oox, so the test and the tested code
is close to each other (just like how it's done in chart2/ already).

Change-Id: I9a2810691f12604d240e4394e6a5ff4e7f52f1c1
Reviewed-on: https://gerrit.libreoffice.org/83412
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>
Tested-by: Jenkins

7 files changed, 167 insertions, 2 deletions

diff --git a/oox/CppunitTest_oox_drawingml.mk b/oox/CppunitTest_oox_drawingml.mk
new file mode 100644
index 000000000000..dd0288074e32
--- /dev/null
+++ b/oox/CppunitTest_oox_drawingml.mk
@@ -0,0 +1,45 @@
+# -*- Mode: makefile-gmake; tab-width: 4; indent-tabs-mode: t -*-
+#*************************************************************************
+#
+# 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/.
+#
+#*************************************************************************
+
+$(eval $(call gb_CppunitTest_CppunitTest,oox_drawingml))
+
+$(eval $(call gb_CppunitTest_use_externals,oox_drawingml,\
+	boost_headers \
+))
+
+$(eval $(call gb_CppunitTest_add_exception_objects,oox_drawingml, \
+    oox/qa/unit/drawingml \
+))
+
+$(eval $(call gb_CppunitTest_use_libraries,oox_drawingml, \
+    comphelper \
+    cppu \
+    oox \
+    sal \
+    test \
+    unotest \
+    utl \
+))
+
+$(eval $(call gb_CppunitTest_use_sdk_api,oox_drawingml))
+
+$(eval $(call gb_CppunitTest_use_ure,oox_drawingml))
+$(eval $(call gb_CppunitTest_use_vcl,oox_drawingml))
+
+$(eval $(call gb_CppunitTest_use_rdb,oox_drawingml,services))
+
+$(eval $(call gb_CppunitTest_use_custom_headers,oox_drawingml,\
+	officecfg/registry \
+))
+
+$(eval $(call gb_CppunitTest_use_configuration,oox_drawingml))
+
+# vim: set noet sw=4 ts=4:
diff --git a/oox/Module_oox.mk b/oox/Module_oox.mk
index 636f9f6ece99..6078a7e24c0c 100644
--- a/oox/Module_oox.mk
+++ b/oox/Module_oox.mk
@@ -26,6 +26,7 @@ $(eval $(call gb_Module_add_check_targets,oox,\
 	CppunitTest_oox_vba_encryption \
 	CppunitTest_oox_crypto \
 	CppunitTest_oox_mathml \
+	CppunitTest_oox_drawingml \
 ))
 
 # vim: set noet sw=4 ts=4:
diff --git a/oox/qa/unit/data/transparent-text.pptx b/oox/qa/unit/data/transparent-text.pptx
new file mode 100644
index 000000000000..b7b3ede4dc3d
--- /dev/null
+++ b/oox/qa/unit/data/transparent-text.pptx
diff --git a/oox/qa/unit/drawingml.cxx b/oox/qa/unit/drawingml.cxx
new file mode 100644
index 000000000000..e3c455c04867
--- /dev/null
+++ b/oox/qa/unit/drawingml.cxx
@@ -0,0 +1,100 @@
+/* -*- 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/.
+ */
+
+#include <test/bootstrapfixture.hxx>
+#include <unotest/macros_test.hxx>
+
+#include <com/sun/star/beans/XPropertySet.hpp>
+#include <com/sun/star/drawing/XDrawPagesSupplier.hpp>
+#include <com/sun/star/embed/XStorage.hpp>
+#include <com/sun/star/frame/Desktop.hpp>
+#include <com/sun/star/frame/XStorable.hpp>
+
+#include <comphelper/embeddedobjectcontainer.hxx>
+#include <comphelper/processfactory.hxx>
+#include <comphelper/propertyvalue.hxx>
+#include <comphelper/scopeguard.hxx>
+#include <comphelper/storagehelper.hxx>
+#include <unotools/mediadescriptor.hxx>
+#include <unotools/tempfile.hxx>
+
+using namespace ::com::sun::star;
+
+/// oox drawingml tests.
+class OoxDrawingmlTest : public test::BootstrapFixture, public unotest::MacrosTest
+{
+private:
+    uno::Reference<uno::XComponentContext> mxComponentContext;
+    uno::Reference<lang::XComponent> mxComponent;
+
+public:
+    void setUp() override;
+    void tearDown() override;
+    uno::Reference<lang::XComponent>& getComponent() { return mxComponent; }
+    void loadAndReload(const OUString& rURL, const OUString& rFilterName);
+};
+
+void OoxDrawingmlTest::setUp()
+{
+    test::BootstrapFixture::setUp();
+
+    mxComponentContext.set(comphelper::getComponentContext(getMultiServiceFactory()));
+    mxDesktop.set(frame::Desktop::create(mxComponentContext));
+}
+
+void OoxDrawingmlTest::tearDown()
+{
+    if (mxComponent.is())
+        mxComponent->dispose();
+
+    test::BootstrapFixture::tearDown();
+}
+
+void OoxDrawingmlTest::loadAndReload(const OUString& rURL, const OUString& rFilterName)
+{
+    mxComponent = loadFromDesktop(rURL);
+    uno::Reference<frame::XStorable> xStorable(mxComponent, uno::UNO_QUERY);
+    utl::MediaDescriptor aMediaDescriptor;
+    aMediaDescriptor["FilterName"] <<= rFilterName;
+    utl::TempFile aTempFile;
+    xStorable->storeToURL(aTempFile.GetURL(), aMediaDescriptor.getAsConstPropertyValueList());
+    mxComponent->dispose();
+    validate(aTempFile.GetFileName(), test::OOXML);
+    mxComponent = loadFromDesktop(aTempFile.GetURL());
+}
+
+char const DATA_DIRECTORY[] = "/oox/qa/unit/data/";
+
+CPPUNIT_TEST_FIXTURE(OoxDrawingmlTest, testTransparentText)
+{
+    OUString aURL = m_directories.getURLFromSrc(DATA_DIRECTORY) + "transparent-text.pptx";
+    loadAndReload(aURL, "Impress Office Open XML");
+
+    uno::Reference<drawing::XDrawPagesSupplier> xDrawPagesSupplier(getComponent(), uno::UNO_QUERY);
+    uno::Reference<drawing::XDrawPage> xDrawPage(xDrawPagesSupplier->getDrawPages()->getByIndex(0),
+                                                 uno::UNO_QUERY);
+    uno::Reference<container::XEnumerationAccess> xShape(xDrawPage->getByIndex(0), uno::UNO_QUERY);
+    uno::Reference<container::XEnumerationAccess> xParagraph(
+        xShape->createEnumeration()->nextElement(), uno::UNO_QUERY);
+    uno::Reference<beans::XPropertySet> xPortion(xParagraph->createEnumeration()->nextElement(),
+                                                 uno::UNO_QUERY);
+
+    sal_Int16 nTransparency = 0;
+    xPortion->getPropertyValue("CharTransparence") >>= nTransparency;
+
+    // Without the accompanying fix in place, this test would have failed with:
+    // - Expected: 75
+    // - Actual  : 0
+    // i.e. the transparency of the character color was lost on import/export.
+    CPPUNIT_ASSERT_EQUAL(static_cast<sal_Int16>(75), nTransparency);
+}
+
+CPPUNIT_PLUGIN_IMPLEMENT();
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/oox/source/drawingml/textcharacterproperties.cxx b/oox/source/drawingml/textcharacterproperties.cxx
index e2f5cc63c0a2..de47058e60ca 100644
--- a/oox/source/drawingml/textcharacterproperties.cxx
+++ b/oox/source/drawingml/textcharacterproperties.cxx
@@ -109,7 +109,15 @@ void TextCharacterProperties::pushToPropMap( PropertyMap& rPropMap, const XmlFil
     }
 
     if ( maFillProperties.moFillType.has() )
-        rPropMap.setProperty( PROP_CharColor, maFillProperties.getBestSolidColor().getColor( rFilter.getGraphicHelper() ));
+    {
+        Color aColor = maFillProperties.getBestSolidColor();
+        rPropMap.setProperty(PROP_CharColor, aColor.getColor(rFilter.getGraphicHelper()));
+
+        if (aColor.hasTransparency())
+        {
+            rPropMap.setProperty(PROP_CharTransparence, aColor.getTransparency());
+        }
+    }
 
     if( moLang.has() && !moLang.get().isEmpty() )
     {
diff --git a/oox/source/export/drawingml.cxx b/oox/source/export/drawingml.cxx
index 2cc160d05b57..5dc696259649 100644
--- a/oox/source/export/drawingml.cxx
+++ b/oox/source/export/drawingml.cxx
@@ -1883,13 +1883,23 @@ void DrawingML::WriteRunProperties( const Reference< XPropertySet >& rRun, bool
         ::Color color( *o3tl::doAccess<sal_uInt32>(mAny) );
         SAL_INFO("oox.shape", "run color: " << sal_uInt32(color) << " auto: " << sal_uInt32(COL_AUTO));
 
+        // WriteSolidFill() handles MAX_PERCENT as "no transparency".
+        sal_Int32 nTransparency = MAX_PERCENT;
+        if (rXPropSet->getPropertySetInfo()->hasPropertyByName("CharTransparence"))
+        {
+            rXPropSet->getPropertyValue("CharTransparence") >>= nTransparency;
+            // UNO scale is 0..100, OOXML scale is 0..100000; also UNO tracks transparency, OOXML
+            // tracks opacity.
+            nTransparency = MAX_PERCENT - (nTransparency * PER_PERCENT);
+        }
+
         // tdf#104219 In LibreOffice and MS Office, there are two types of colors:
         // Automatic and Fixed. OOXML is setting automatic color, by not providing color.
         if( color != COL_AUTO )
         {
             color.SetTransparency(0);
             // TODO: special handle embossed/engraved
-            WriteSolidFill( color );
+            WriteSolidFill(color, nTransparency);
         }
     }
 
diff --git a/oox/source/token/properties.txt b/oox/source/token/properties.txt
index db44e176ef33..a319b2bd42a9 100644
--- a/oox/source/token/properties.txt
+++ b/oox/source/token/properties.txt
@@ -82,6 +82,7 @@ CharPostureComplex
 CharShadowed
 CharStrikeout
 CharStyleName
+CharTransparence
 CharUnderline
 CharUnderlineColor
 CharUnderlineHasColor