PPTX import: handle adjust values from both the shape and its placeholder

The direct problem is a crash in CustomShapeProperties::pushToPropSet(),
the code just hoped that the input file doesn't have more adjust values
than the # of adjust values we allocate based on the preset type. Fix
the crash, but there is a deeper problem here...

The shape can inherit custom shape properties from a placeholder, then
later it can have its own custom shape properties. When it comes to
adjust values specifically, we used to just append own adjust values to
the end of the list. This way we got the double of expected adjust
values. And later rendering took the N expected adjust values from
the start of the 2N element list, so we used the adjust values of the
placeholder, not of the actual shape.

Fix this by clearing the custom shape geometry once we know we have our
own preset geometry.

Change-Id: I09f669bf59c33b552b906733d323eba7af5548e7
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/95993
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>
Tested-by: Jenkins

4 files changed, 39 insertions, 2 deletions

diff --git a/oox/qa/unit/data/preset-adjust-value.pptx b/oox/qa/unit/data/preset-adjust-value.pptx
new file mode 100644
index 000000000000..d1d570a19d0a
--- /dev/null
+++ b/oox/qa/unit/data/preset-adjust-value.pptx
diff --git a/oox/qa/unit/drawingml.cxx b/oox/qa/unit/drawingml.cxx
index bc2f910bec9b..e1400c7bfe0c 100644
--- a/oox/qa/unit/drawingml.cxx
+++ b/oox/qa/unit/drawingml.cxx
@@ -16,6 +16,7 @@
 #include <com/sun/star/drawing/XShape.hpp>
 #include <com/sun/star/frame/Desktop.hpp>
 #include <com/sun/star/frame/XStorable.hpp>
+#include <com/sun/star/drawing/EnhancedCustomShapeAdjustmentValue.hpp>
 
 #include <unotools/mediadescriptor.hxx>
 #include <unotools/tempfile.hxx>
@@ -50,6 +51,7 @@ public:
     void setUp() override;
     void tearDown() override;
     uno::Reference<lang::XComponent>& getComponent() { return mxComponent; }
+    void load(const OUString& rURL);
     void loadAndReload(const OUString& rURL, const OUString& rFilterName);
 };
 
@@ -68,9 +70,11 @@ void OoxDrawingmlTest::tearDown()
     test::BootstrapFixture::tearDown();
 }
 
+void OoxDrawingmlTest::load(const OUString& rURL) { mxComponent = loadFromDesktop(rURL); }
+
 void OoxDrawingmlTest::loadAndReload(const OUString& rURL, const OUString& rFilterName)
 {
-    mxComponent = loadFromDesktop(rURL);
+    load(rURL);
     uno::Reference<frame::XStorable> xStorable(mxComponent, uno::UNO_QUERY);
     utl::MediaDescriptor aMediaDescriptor;
     aMediaDescriptor["FilterName"] <<= rFilterName;
@@ -128,6 +132,30 @@ CPPUNIT_TEST_FIXTURE(OoxDrawingmlTest, testTdf131082)
     CPPUNIT_ASSERT_EQUAL(drawing::FillStyle_SOLID, eFillStyle);
 }
 
+CPPUNIT_TEST_FIXTURE(OoxDrawingmlTest, testPresetAdjustValue)
+{
+    OUString aURL = m_directories.getURLFromSrc(DATA_DIRECTORY) + "preset-adjust-value.pptx";
+
+    load(aURL);
+
+    uno::Reference<drawing::XDrawPagesSupplier> xDrawPagesSupplier(getComponent(), uno::UNO_QUERY);
+    uno::Reference<drawing::XDrawPage> xDrawPage(xDrawPagesSupplier->getDrawPages()->getByIndex(0),
+                                                 uno::UNO_QUERY);
+    uno::Reference<drawing::XShape> xShape(xDrawPage->getByIndex(0), uno::UNO_QUERY);
+    uno::Reference<beans::XPropertySet> xShapeProps(xShape, uno::UNO_QUERY);
+    uno::Sequence<beans::PropertyValue> aGeoPropSeq;
+    xShapeProps->getPropertyValue("CustomShapeGeometry") >>= aGeoPropSeq;
+    comphelper::SequenceAsHashMap aGeoPropMap(aGeoPropSeq);
+    uno::Sequence<drawing::EnhancedCustomShapeAdjustmentValue> aAdjustmentSeq;
+    aGeoPropMap.getValue("AdjustmentValues") >>= aAdjustmentSeq;
+    CPPUNIT_ASSERT_EQUAL(static_cast<sal_Int32>(1), aAdjustmentSeq.getLength());
+    // Without the accompanying fix in place, this test would have failed with:
+    // - Expected: 11587
+    // - Actual  : 10813
+    // i.e. the adjust value was set from the placeholder, not from the shape.
+    CPPUNIT_ASSERT_EQUAL(static_cast<sal_Int32>(11587), aAdjustmentSeq[0].Value.get<sal_Int32>());
+}
+
 CPPUNIT_PLUGIN_IMPLEMENT();
 
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/oox/source/drawingml/customshapeproperties.cxx b/oox/source/drawingml/customshapeproperties.cxx
index 3b530bddfed6..00ecf33368ae 100644
--- a/oox/source/drawingml/customshapeproperties.cxx
+++ b/oox/source/drawingml/customshapeproperties.cxx
@@ -203,7 +203,11 @@ void CustomShapeProperties::pushToPropSet(
                                     aAdjustmentVal.Value <<= adjustmentGuide.maFormula.toInt32();
                                     aAdjustmentVal.State = PropertyState_DIRECT_VALUE;
                                     aAdjustmentVal.Name = adjustmentGuide.maName;
-                                    aAdjustmentSeq[ nIndex++ ] = aAdjustmentVal;
+                                    if (nIndex < aAdjustmentSeq.getLength())
+                                    {
+                                        aAdjustmentSeq[nIndex] = aAdjustmentVal;
+                                        ++nIndex;
+                                    }
                                 }
                             }
                             rGeoProp.Value <<= aAdjustmentSeq;
diff --git a/oox/source/drawingml/shapepropertiescontext.cxx b/oox/source/drawingml/shapepropertiescontext.cxx
index bbe621786742..4591cb834489 100644
--- a/oox/source/drawingml/shapepropertiescontext.cxx
+++ b/oox/source/drawingml/shapepropertiescontext.cxx
@@ -28,6 +28,7 @@
 #include <oox/helper/attributelist.hxx>
 #include <oox/token/namespaces.hxx>
 #include <oox/token/tokens.hxx>
+#include <drawingml/customshapeproperties.hxx>
 
 using namespace oox::core;
 using namespace ::com::sun::star;
@@ -71,6 +72,10 @@ ContextHandlerRef ShapePropertiesContext::onCreateContext( sal_Int32 aElementTok
             {
                 mrShape.getServiceName() = "com.sun.star.drawing.CustomShape";
             }
+
+            // We got a preset geometry, forget the geometry inherited from the placeholder shape.
+            mrShape.getCustomShapeProperties() = std::make_shared<CustomShapeProperties>();
+
             return new PresetShapeGeometryContext( *this, rAttribs, *(mrShape.getCustomShapeProperties()) );
         }