loplugin:unocast (vclcanvas::CanvasFont)

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

Change-Id: Id92c7e4367aae8e22d77772986d85288cdb73f2a
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/144770
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

3 files changed, 17 insertions, 2 deletions

diff --git a/canvas/source/vcl/canvasfont.cxx b/canvas/source/vcl/canvasfont.cxx
index e7fab0492549..0f342de0785a 100644
--- a/canvas/source/vcl/canvasfont.cxx
+++ b/canvas/source/vcl/canvasfont.cxx
@@ -22,6 +22,7 @@
 #include <basegfx/numeric/ftools.hxx>
 #include <canvas/canvastools.hxx>
 #include <com/sun/star/rendering/PanoseProportion.hpp>
+#include <comphelper/servicehelper.hxx>
 #include <cppuhelper/supportsservice.hxx>
 #include <i18nlangtag/languagetag.hxx>
 #include <rtl/math.hxx>
@@ -168,6 +169,15 @@ namespace vclcanvas
         return { "com.sun.star.rendering.CanvasFont" };
     }
 
+    sal_Int64 CanvasFont::getSomething(css::uno::Sequence<sal_Int8> const & aIdentifier) {
+        return comphelper::getSomethingImpl(aIdentifier, this);
+    }
+
+    css::uno::Sequence<sal_Int8> const & CanvasFont::getUnoTunnelId() {
+        static comphelper::UnoIdInit const id;
+        return id.getSeq();
+    }
+
     vcl::Font const & CanvasFont::getVCLFont() const
     {
         return *maFont;
diff --git a/canvas/source/vcl/canvasfont.hxx b/canvas/source/vcl/canvasfont.hxx
index fdfa870f5ed3..a4fd9fb0bc3e 100644
--- a/canvas/source/vcl/canvasfont.hxx
+++ b/canvas/source/vcl/canvasfont.hxx
@@ -23,6 +23,7 @@
 #include <cppuhelper/basemutex.hxx>
 
 #include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/lang/XUnoTunnel.hpp>
 #include <com/sun/star/geometry/Matrix2D.hpp>
 #include <com/sun/star/rendering/FontRequest.hpp>
 #include <com/sun/star/rendering/XCanvasFont.hpp>
@@ -40,7 +41,8 @@
 namespace vclcanvas
 {
     typedef ::cppu::WeakComponentImplHelper< css::rendering::XCanvasFont,
-                                             css::lang::XServiceInfo > CanvasFont_Base;
+                                             css::lang::XServiceInfo,
+                                             css::lang::XUnoTunnel > CanvasFont_Base;
 
     class CanvasFont : public ::cppu::BaseMutex,
                        public CanvasFont_Base
@@ -73,6 +75,9 @@ namespace vclcanvas
         virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) override;
         virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
 
+        sal_Int64 SAL_CALL getSomething(css::uno::Sequence<sal_Int8> const & aIdentifier) override;
+        static css::uno::Sequence<sal_Int8> const & getUnoTunnelId();
+
         vcl::Font const & getVCLFont() const;
 
     private:
diff --git a/canvas/source/vcl/canvashelper.cxx b/canvas/source/vcl/canvashelper.cxx
index cbbd18a376d9..60ab39d470a2 100644
--- a/canvas/source/vcl/canvashelper.cxx
+++ b/canvas/source/vcl/canvashelper.cxx
@@ -1111,7 +1111,7 @@ namespace vclcanvas
 
         setupOutDevState( viewState, renderState, TEXT_COLOR );
 
-        CanvasFont* pFont = dynamic_cast< CanvasFont* >( xFont.get() );
+        CanvasFont* pFont = comphelper::getFromUnoTunnel< CanvasFont >( xFont );
 
         ENSURE_ARG_OR_THROW( pFont,
                              "Font not compatible with this canvas" );