tdf#83671 make SmartArt visible in import of xlsx

Problem is, that Excel writes a zero size in xdr:xfrm for the SmartArt.
With that the import generates a background size with zero width and
height and no shapes at all in the SmartArt group. The diagram DOM is
imported correctly. The actual size is not known until the row and column
values of the anchor are evaluated.
The idea of this patch is to correct the background size directly and to
repeat the import of drawing.xml when the actual size is known.

I noticed that in import of SmartArt in docx there is a similar problem
that the SmartArt shapes are missing at some point, as can be seen in
ShapeContextHandler::getShape(), about line 428. It uses
ShapeDrawingFragmentHandler to import the shapes. To be able to use that
handler too, I have moved its header file to include.
The solution for docx uses a loop over the vector getExtDrawings(). But I
have not seen a SmartArt case, where more then one element exists in it.

Whether the shape is a diagram, is indirectly tested currently. The
shape has yet no direct method for it.

Change-Id: I9d705ed5bfb2894e9ce740ebf8589e06b4870bed
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/141571
Tested-by: Jenkins
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>

1 files changed, 35 insertions, 0 deletions

diff --git a/include/oox/shape/ShapeDrawingFragmentHandler.hxx b/include/oox/shape/ShapeDrawingFragmentHandler.hxx
new file mode 100644
index 000000000000..340edca5e1d1
--- /dev/null
+++ b/include/oox/shape/ShapeDrawingFragmentHandler.hxx
@@ -0,0 +1,35 @@
+/* -*- 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/.
+ */
+
+#ifndef INCLUDED_OOX_SOURCE_SHAPE_SHAPEDRAWINGFRAGMENTHANDLER_HXX
+#define INCLUDED_OOX_SOURCE_SHAPE_SHAPEDRAWINGFRAGMENTHANDLER_HXX
+
+#include <oox/core/fragmenthandler2.hxx>
+#include <oox/drawingml/drawingmltypes.hxx>
+
+namespace oox::shape {
+
+/// Generic (i.e. not specific to PPTX) handler for the prerendered diagram parsing.
+class OOX_DLLPUBLIC ShapeDrawingFragmentHandler : public oox::core::FragmentHandler2
+{
+public:
+    ShapeDrawingFragmentHandler(oox::core::XmlFilterBase& rFilter, const OUString& rFragmentPath, oox::drawingml::ShapePtr pGroupShapePtr);
+    virtual ~ShapeDrawingFragmentHandler() noexcept override;
+    virtual void SAL_CALL endDocument() override;
+    virtual ::oox::core::ContextHandlerRef onCreateContext(sal_Int32 Element, const AttributeList& rAttribs ) override;
+
+private:
+        oox::drawingml::ShapePtr        mpGroupShapePtr;
+};
+
+}
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */