Export to PNG: selected shapes via drawing::GraphicExportFilter, tdf#108317

Change-Id: Id09d9b21b2e6c018dd199a1911a9125c118abec2
Reviewed-on: https://gerrit.libreoffice.org/42658Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Eike Rathke <erack@redhat.com>

filter/source/graphic/GraphicExportFilter.cxx

@@ -19,6 +19,8 @@
 
 #include "GraphicExportFilter.hxx"
 
+#include <com/sun/star/drawing/GraphicExportFilter.hpp>
+
 #include <vcl/graphicfilter.hxx>
 #include <svl/outstrm.hxx>
 #include <svtools/DocumentToGraphicRenderer.hxx>
@@ -115,6 +117,22 @@ sal_Bool SAL_CALL GraphicExportFilter::filter( const Sequence<PropertyValue>& rD
 {
     gatherProperties(rDescriptor);
 
+    if (mbSelectionOnly && mxDocument.is())
+    {
+        uno::Reference< frame::XModel > xModel( mxDocument, uno::UNO_QUERY);
+        if (xModel.is())
+        {
+            uno::Reference< frame::XController > xController( xModel->getCurrentController());
+            if (xController.is())
+            {
+                uno::Reference< drawing::XShapes > xShapes;
+                uno::Reference< drawing::XShape > xShape;
+                if (DocumentToGraphicRenderer::isShapeSelected( xShapes, xShape, xController))
+                    return filterExportShape( rDescriptor, xShapes, xShape);
+            }
+        }
+    }
+
     return filterRenderDocument();
 }
 
@@ -193,6 +211,40 @@ bool GraphicExportFilter::filterRenderDocument() const
     return false;
 }
 
+bool GraphicExportFilter::filterExportShape(
+        const css::uno::Sequence< css::beans::PropertyValue > & rDescriptor,
+        const css::uno::Reference< css::drawing::XShapes > & rxShapes,
+        const css::uno::Reference< css::drawing::XShape > & rxShape ) const
+{
+    uno::Reference< lang::XComponent > xSourceDoc;
+    if (rxShapes.is())
+        xSourceDoc.set( rxShapes, uno::UNO_QUERY_THROW );
+    else if (rxShape.is())
+        xSourceDoc.set( rxShape, uno::UNO_QUERY_THROW );
+    if (!xSourceDoc.is())
+        return false;
+
+    uno::Reference< drawing::XGraphicExportFilter > xGraphicExporter =
+        drawing::GraphicExportFilter::create( mxContext );
+    if (!xGraphicExporter.is())
+        return false;
+
+    // Need to replace the internal filter name with the short name
+    // (extension).
+    uno::Sequence< beans::PropertyValue > aDescriptor( rDescriptor);
+    for (sal_Int32 i = 0; i < aDescriptor.getLength(); ++i)
+    {
+        if (aDescriptor[i].Name == "FilterName")
+        {
+            aDescriptor[i].Value <<= mFilterExtension;
+            break;
+        }
+    }
+
+    xGraphicExporter->setSourceDocument( xSourceDoc );
+    return xGraphicExporter->filter( aDescriptor );
+}
+
 void SAL_CALL GraphicExportFilter::cancel( )
 {
 }

filter/source/graphic/GraphicExportFilter.hxx

@@ -28,6 +28,13 @@
 #include <cppuhelper/implbase.hxx>
 #include <comphelper/processfactory.hxx>
 
+namespace com { namespace sun { namespace star {
+    namespace drawing {
+        class XShapes;
+        class XShape;
+    }
+}}}
+
 using namespace css;
 using namespace css::uno;
 using namespace css::lang;
@@ -57,6 +64,10 @@ class GraphicExportFilter :
     css::uno::Any   maQuality;
 
     bool filterRenderDocument() const;
+    bool filterExportShape(
+            const css::uno::Sequence< css::beans::PropertyValue > & rDescriptor,
+            const css::uno::Reference< css::drawing::XShapes > & rxShapes,
+            const css::uno::Reference< css::drawing::XShape > & rxShape ) const;
 
 public:
     explicit GraphicExportFilter( const Reference<XComponentContext>& rxContext );