loplugin:unocast (basegfx::unotools::UnoPolyPolygon)

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

Change-Id: I166d8f31a13a98caf0bb7a3b5025a9d942808096
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/144746
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

3 files changed, 20 insertions, 3 deletions

diff --git a/basegfx/source/tools/canvastools.cxx b/basegfx/source/tools/canvastools.cxx
index d388356199a2..1f65e89b182b 100644
--- a/basegfx/source/tools/canvastools.cxx
+++ b/basegfx/source/tools/canvastools.cxx
@@ -30,6 +30,7 @@
 #include <com/sun/star/rendering/XPolyPolygon2D.hpp>
 #include <com/sun/star/rendering/XGraphicDevice.hpp>
 #include <com/sun/star/awt/Rectangle.hpp>
+#include <comphelper/servicehelper.hxx>
 #include <basegfx/utils/unopolypolygon.hxx>
 #include <basegfx/matrix/b2dhommatrix.hxx>
 #include <basegfx/matrix/b3dhommatrix.hxx>
@@ -251,7 +252,7 @@ namespace basegfx::unotools
         ::basegfx::B2DPolyPolygon b2DPolyPolygonFromXPolyPolygon2D( const uno::Reference< rendering::XPolyPolygon2D >& xPoly )
         {
             ::basegfx::unotools::UnoPolyPolygon* pPolyImpl =
-                dynamic_cast< ::basegfx::unotools::UnoPolyPolygon* >( xPoly.get() );
+                comphelper::getFromUnoTunnel< ::basegfx::unotools::UnoPolyPolygon >( xPoly );
 
             if( pPolyImpl )
             {
diff --git a/basegfx/source/tools/unopolypolygon.cxx b/basegfx/source/tools/unopolypolygon.cxx
index 0c3b59abac9b..099cbee5eb75 100644
--- a/basegfx/source/tools/unopolypolygon.cxx
+++ b/basegfx/source/tools/unopolypolygon.cxx
@@ -27,6 +27,7 @@
 #include <basegfx/polygon/b2dpolypolygontools.hxx>
 #include <basegfx/utils/unopolypolygon.hxx>
 #include <basegfx/matrix/b2dhommatrixtools.hxx>
+#include <comphelper/servicehelper.hxx>
 #include <cppuhelper/supportsservice.hxx>
 #include <utility>
 
@@ -60,7 +61,7 @@ namespace basegfx::unotools
         }
 
         B2DPolyPolygon        aSrcPoly;
-        const UnoPolyPolygon* pSrc( dynamic_cast< UnoPolyPolygon* >(polyPolygon.get()) );
+        const UnoPolyPolygon* pSrc( comphelper::getFromUnoTunnel< UnoPolyPolygon >(polyPolygon) );
 
         // try to extract polygon data from interface. First,
         // check whether it's the same implementation object,
@@ -434,6 +435,15 @@ namespace basegfx::unotools
         return { "com.sun.star.rendering.PolyPolygon2D" };
     }
 
+    sal_Int64 UnoPolyPolygon::getSomething(css::uno::Sequence<sal_Int8> const & aIdentifier) {
+        return comphelper::getSomethingImpl(aIdentifier, this);
+    }
+
+    css::uno::Sequence<sal_Int8> const & UnoPolyPolygon::getUnoTunnelId() {
+        static comphelper::UnoIdInit const id;
+        return id.getSeq();
+    }
+
     B2DPolyPolygon UnoPolyPolygon::getPolyPolygon() const
     {
         std::unique_lock const guard( m_aMutex );
diff --git a/include/basegfx/utils/unopolypolygon.hxx b/include/basegfx/utils/unopolypolygon.hxx
index 48788b074ede..4392f798c6ce 100644
--- a/include/basegfx/utils/unopolypolygon.hxx
+++ b/include/basegfx/utils/unopolypolygon.hxx
@@ -22,6 +22,7 @@
 #include <comphelper/compbase.hxx>
 #include <com/sun/star/lang/IndexOutOfBoundsException.hpp>
 #include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/lang/XUnoTunnel.hpp>
 #include <com/sun/star/rendering/FillRule.hpp>
 #include <com/sun/star/rendering/XLinePolyPolygon2D.hpp>
 #include <com/sun/star/rendering/XBezierPolyPolygon2D.hpp>
@@ -34,7 +35,8 @@ namespace basegfx::unotools
     typedef comphelper::WeakComponentImplHelper<
             css::rendering::XLinePolyPolygon2D,
             css::rendering::XBezierPolyPolygon2D,
-            css::lang::XServiceInfo > UnoPolyPolygonBase;
+            css::lang::XServiceInfo,
+            css::lang::XUnoTunnel > UnoPolyPolygonBase;
 
     class BASEGFX_DLLPUBLIC UnoPolyPolygon
         : public UnoPolyPolygonBase
@@ -68,6 +70,10 @@ namespace basegfx::unotools
         SAL_DLLPRIVATE virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) override;
         SAL_DLLPRIVATE virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
 
+        SAL_DLLPRIVATE sal_Int64 SAL_CALL getSomething(
+            css::uno::Sequence<sal_Int8> const & aIdentifier) override;
+        static SAL_DLLPRIVATE css::uno::Sequence<sal_Int8> const & getUnoTunnelId();
+
         SAL_DLLPRIVATE B2DPolyPolygon getPolyPolygon() const;
 
     protected: