loplugin:unocast (DocumentSettingsSerializer)

(See the upcoming commit introducing that loplugin:unocast on why such
dynamic_casts from UNO types are dangerous.)

Change-Id: I803f62085264511976ed9bb0744ee301de2a7dab
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/144754
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

include/xmloff/settingsstore.hxx

@@ -12,7 +12,10 @@
 #ifndef INCLUDED_XMLOFF_SETTINGSSTORE_HXX
 #define INCLUDED_XMLOFF_SETTINGSSTORE_HXX
 
+#include <com/sun/star/lang/XUnoTunnel.hpp>
 #include <com/sun/star/uno/Sequence.hxx>
+#include <cppuhelper/implbase.hxx>
+#include <xmloff/dllapi.h>
 
 namespace com::sun::star::beans { struct PropertyValue; }
 namespace com::sun::star::embed { class XStorage; }
@@ -20,7 +23,9 @@ namespace com::sun::star::uno { template <typename > class Reference; }
 
 // Scans list of properties for certain URL properties that could refer
 // to internal objects, and initializes from these.
-class SAL_DLLPUBLIC_RTTI SAL_LOPLUGIN_ANNOTATE("crosscast") DocumentSettingsSerializer {
+class XMLOFF_DLLPUBLIC DocumentSettingsSerializer:
+    public cppu::WeakImplHelper<css::lang::XUnoTunnel>
+{
 public:
   // Import objects and update properties (eliding URLs)
   virtual css::uno::Sequence<css::beans::PropertyValue>
@@ -34,8 +39,11 @@ public:
         const css::uno::Reference< css::embed::XStorage > &xStorage,
         const css::uno::Sequence<css::beans::PropertyValue>& aConfigProps ) = 0;
 
+    sal_Int64 SAL_CALL getSomething(css::uno::Sequence<sal_Int8> const & aIdentifier) override;
+    static css::uno::Sequence<sal_Int8> const & getUnoTunnelId();
+
 protected:
-    ~DocumentSettingsSerializer() {}
+    ~DocumentSettingsSerializer() override;
 };
 
 #endif // INCLUDED_XMLOFF_SETTINGSSTORE_HXX

sd/Library_sd.mk

@@ -97,6 +97,7 @@ $(eval $(call gb_Library_use_libraries,sd,\
 	ucbhelper \
 	utl \
 	vcl \
+	xo \
 	$(if $(ENABLE_NSS),xmlsecurity) \
 ))
 

sd/source/ui/unoidl/UnoDocumentSettings.cxx

@@ -69,9 +69,10 @@ namespace sd
 {
     namespace {
 
-    class DocumentSettings : public WeakImplHelper< XPropertySet, XMultiPropertySet, XServiceInfo >,
-                             public comphelper::PropertySetHelper,
-                             public DocumentSettingsSerializer
+    class DocumentSettings : public ImplInheritanceHelper<
+                                 DocumentSettingsSerializer, XPropertySet, XMultiPropertySet,
+                                 XServiceInfo >,
+                             public comphelper::PropertySetHelper
     {
     public:
         explicit DocumentSettings( SdXImpressDocument* pModel );
@@ -1336,17 +1337,17 @@ DocumentSettings::_getPropertyValues(
 // XInterface
 Any SAL_CALL DocumentSettings::queryInterface( const Type& aType )
 {
-    return WeakImplHelper< XPropertySet, XMultiPropertySet, XServiceInfo >::queryInterface( aType );
+    return ImplInheritanceHelper::queryInterface( aType );
 }
 
 void SAL_CALL DocumentSettings::acquire(  ) noexcept
 {
-    WeakImplHelper< XPropertySet, XMultiPropertySet, XServiceInfo >::acquire();
+    ImplInheritanceHelper::acquire();
 }
 
 void SAL_CALL DocumentSettings::release(  ) noexcept
 {
-    WeakImplHelper< XPropertySet, XMultiPropertySet, XServiceInfo >::release();
+    ImplInheritanceHelper::release();
 }
 
 // XPropertySet

xmloff/Library_xo.mk

@@ -154,6 +154,7 @@ $(eval $(call gb_Library_add_exception_objects,xo,\
     xmloff/source/draw/sdpropls \
     xmloff/source/draw/sdxmlexp \
     xmloff/source/draw/sdxmlimp \
+    xmloff/source/draw/settingsstore \
     xmloff/source/draw/shapeexport \
     xmloff/source/draw/shapeimport \
     xmloff/source/draw/SignatureLineContext \

xmloff/source/draw/sdxmlexp.cxx

@@ -52,6 +52,7 @@
 #include <rtl/ustrbuf.hxx>
 #include <sal/log.hxx>
 #include <comphelper/diagnose_ex.hxx>
+#include <comphelper/servicehelper.hxx>
 #include <tools/gen.hxx>
 #include <sax/tools/converter.hxx>
 #include <xmloff/xmlaustp.hxx>
@@ -2473,7 +2474,8 @@ void SdXMLExport::GetConfigurationSettings(uno::Sequence<beans::PropertyValue>&
     Reference< beans::XPropertySet > xProps( xFac->createInstance("com.sun.star.document.Settings"), UNO_QUERY );
     if( xProps.is() )
         SvXMLUnitConverter::convertPropertySet( rProps, xProps );
-    DocumentSettingsSerializer *pFilter(dynamic_cast<DocumentSettingsSerializer *>(xProps.get()));
+    DocumentSettingsSerializer *pFilter(
+        comphelper::getFromUnoTunnel<DocumentSettingsSerializer>(xProps));
     if (!pFilter)
         return;
     const uno::Reference< embed::XStorage > xStorage(GetTargetStorage());

xmloff/source/draw/sdxmlimp.cxx

@@ -21,6 +21,7 @@
 #include <sal/log.hxx>
 #include <comphelper/processfactory.hxx>
 #include <comphelper/sequence.hxx>
+#include <comphelper/servicehelper.hxx>
 
 #include <xmloff/xmlscripti.hxx>
 #include "sdxmlimp_impl.hxx"
@@ -552,7 +553,7 @@ void SdXMLImport::SetConfigurationSettings(const css::uno::Sequence<css::beans::
     const uno::Sequence<beans::PropertyValue>* pValues = &aConfigProps;
 
     DocumentSettingsSerializer *pFilter;
-    pFilter = dynamic_cast<DocumentSettingsSerializer *>(xProps.get());
+    pFilter = comphelper::getFromUnoTunnel<DocumentSettingsSerializer>(xProps);
     uno::Sequence<beans::PropertyValue> aFiltered;
     if( pFilter )
     {

xmloff/source/draw/settingsstore.cxx

@@ -0,0 +1,28 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
+/*
+ * 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 <sal/config.h>
+
+#include <comphelper/servicehelper.hxx>
+#include <xmloff/settingsstore.hxx>
+
+sal_Int64 DocumentSettingsSerializer::getSomething(css::uno::Sequence<sal_Int8> const& aIdentifier)
+{
+    return comphelper::getSomethingImpl(aIdentifier, this);
+}
+
+css::uno::Sequence<sal_Int8> const& DocumentSettingsSerializer::getUnoTunnelId()
+{
+    static comphelper::UnoIdInit const id;
+    return id.getSeq();
+}
+
+DocumentSettingsSerializer::~DocumentSettingsSerializer() {}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */