oox smartart import, composite alg: implement vertical centering

The bugdoc's case was that the total height would be used by 2 shapes,
but then a constraint decreases the height of one shape, so not all
vertical space is used.

We used to just count from the top, need to center vertically, as
PowerPoint does it.

Change-Id: I436019e9e837b73130e387c9bcd309e20045b0f9
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/94948
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>
Tested-by: Jenkins

2 files changed, 31 insertions, 0 deletions

diff --git a/oox/source/drawingml/diagram/diagramlayoutatoms.cxx b/oox/source/drawingml/diagram/diagramlayoutatoms.cxx
index 5e36f08d06ab..36b361db9a3b 100644
--- a/oox/source/drawingml/diagram/diagramlayoutatoms.cxx
+++ b/oox/source/drawingml/diagram/diagramlayoutatoms.cxx
@@ -478,6 +478,11 @@ void AlgAtom::layoutShape( const ShapePtr& rShape,
             LayoutProperty& rParent = aProperties[""];
 
             sal_Int32 nParentXOffset = 0;
+
+            // Track min/max vertical positions, so we can center everything at the end, if needed.
+            sal_Int32 nVertMin = std::numeric_limits<sal_Int32>::max();
+            sal_Int32 nVertMax = 0;
+
             if (mfAspectRatio != 1.0)
             {
                 rParent[XML_w] = rShape->getSize().Width;
@@ -613,6 +618,24 @@ void AlgAtom::layoutShape( const ShapePtr& rShape,
                 aCurrShape->setSize(aSize);
                 aCurrShape->setChildSize(aSize);
                 aCurrShape->setPosition(aPos);
+
+                nVertMin = std::min(aPos.Y, nVertMin);
+                nVertMax = std::max(aPos.Y + aSize.Height, nVertMax);
+            }
+
+            // See if all vertical space is used or we have to center the content.
+            if (nVertMin >= 0 && nVertMax <= rParent[XML_h])
+            {
+                sal_Int32 nDiff = rParent[XML_h] - (nVertMax - nVertMin);
+                if (nDiff > 0)
+                {
+                    for (auto& aCurrShape : rShape->getChildren())
+                    {
+                        awt::Point aPosition = aCurrShape->getPosition();
+                        aPosition.Y += nDiff / 2;
+                        aCurrShape->setPosition(aPosition);
+                    }
+                }
             }
             break;
         }
diff --git a/sd/qa/unit/import-tests-smartart.cxx b/sd/qa/unit/import-tests-smartart.cxx
index 67db3deb4cc6..f08b60c30193 100644
--- a/sd/qa/unit/import-tests-smartart.cxx
+++ b/sd/qa/unit/import-tests-smartart.cxx
@@ -1498,6 +1498,14 @@ void SdImportTestSmartArt::testFillColorList()
     awt::Size aActualSize = xShape->getSize();
     CPPUNIT_ASSERT_EQUAL(static_cast<sal_Int32>(2239), aActualSize.Height);
 
+    // Without the accompanying fix in place, this test would have failed with:
+    // - Expected greater than: 1738 (2766)
+    // - Actual  : 1738
+    // i.e. the columns were not centered vertically.
+    sal_Int32 nGroupTop = xGroup->getPosition().Y;
+    sal_Int32 nShapeTop = xShape->getPosition().Y;
+    CPPUNIT_ASSERT_GREATER(nGroupTop, nShapeTop);
+
     xDocShRef->DoClose();
 }