oox smartart: add support for syncing font heights of multiple shapes

When 2 or more shapes have their text set to autofit and they have a
constraint like:

<dgm:constr type="primFontSz" for="des" forName="node" op="equ"/>

Then make sure that the automatic font size is the same for all shapes
and all content fits, by using the smallest scaling factor from all
relevant shapes.

Some rework is needed, because normally oox::drawingml::Shapes don't
have access to their parents, at the same time there can be multiple
SmartArts on a single slide, so storing the grouping info in the filter
is problematic, too. Solve this by storing the grouping in the toplevel
oox::drawingml::Shape and exposing them in XmlFilterBase just during the
time the children of the toplevel shape of the SmartArt are added.

This works, because we know SmartArts can't be nested.

Change-Id: I6c591eadc7166c7c42752650afdb7ee1e416cff6
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/102490
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>
Tested-by: Jenkins

1 files changed, 13 insertions, 0 deletions

diff --git a/oox/source/ppt/pptshape.cxx b/oox/source/ppt/pptshape.cxx
index d017b4348d93..96ca319f2a8e 100644
--- a/oox/source/ppt/pptshape.cxx
+++ b/oox/source/ppt/pptshape.cxx
@@ -409,10 +409,23 @@ void PPTShape::addShape(
             // if this is a group shape, we have to add also each child shape
             Reference<XShapes> xShapes(xShape, UNO_QUERY);
             if (xShapes.is())
+            {
+                if (meFrameType == FRAMETYPE_DIAGRAM)
+                {
+                    rFilterBase.setDiagramFontHeights(&getDiagramFontHeights());
+                }
                 addChildren( rFilterBase, *this, pTheme, xShapes, pShapeMap, aTransformation );
+                if (meFrameType == FRAMETYPE_DIAGRAM)
+                {
+                    rFilterBase.setDiagramFontHeights(nullptr);
+                }
+            }
 
             if (meFrameType == FRAMETYPE_DIAGRAM)
+            {
                 keepDiagramCompatibilityInfo();
+                syncDiagramFontHeights();
+            }
         }
     }
     catch (const Exception&)