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.

(cherry picked from commit 1bd3474c7c7945e1182dfbaca89be05ea98dd3e8)

Conflicts:
include/oox/core/xmlfilterbase.hxx

Change-Id: I6c591eadc7166c7c42752650afdb7ee1e416cff6
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/102711
Tested-by: Jenkins
Reviewed-by: Gülşah Köse <gulsah.kose@collabora.com>

7 files changed, 126 insertions, 11 deletions

diff --git a/oox/source/core/xmlfilterbase.cxx b/oox/source/core/xmlfilterbase.cxx
index 5c5d5e5076e5..e0e1933a39a1 100644
--- a/oox/source/core/xmlfilterbase.cxx
+++ b/oox/source/core/xmlfilterbase.cxx
@@ -175,6 +175,7 @@ struct XmlFilterBaseImpl
     RelationsMap                   maRelationsMap;
     TextFieldStack                 maTextFieldStack;
     const NamespaceMap&            mrNamespaceMap;
+    NamedShapePairs* mpDiagramFontHeights = nullptr;
 
     /// @throws RuntimeException
     explicit            XmlFilterBaseImpl();
@@ -939,6 +940,13 @@ void XmlFilterBase::setMissingExtDrawing()
     mbMissingExtDrawing = true;
 }
 
+void XmlFilterBase::setDiagramFontHeights(NamedShapePairs* pDiagramFontHeights)
+{
+    mxImpl->mpDiagramFontHeights = pDiagramFontHeights;
+}
+
+NamedShapePairs* XmlFilterBase::getDiagramFontHeights() { return mxImpl->mpDiagramFontHeights; }
+
 OUString XmlFilterBase::getNamespaceURL(sal_Int32 nNSID) const
 {
     auto itr = mxImpl->mrNamespaceMap.maTransitionalNamespaceMap.find(nNSID);
diff --git a/oox/source/drawingml/diagram/diagram.cxx b/oox/source/drawingml/diagram/diagram.cxx
index 8265ae7b3a88..d9f35df42ebf 100644
--- a/oox/source/drawingml/diagram/diagram.cxx
+++ b/oox/source/drawingml/diagram/diagram.cxx
@@ -135,6 +135,11 @@ void Diagram::addTo( const ShapePtr & pParentShape )
     aChildren.insert(aChildren.begin(), pBackground);
 }
 
+Diagram::Diagram(const ShapePtr& pShape)
+    : mpShape(pShape)
+{
+}
+
 uno::Sequence<beans::PropertyValue> Diagram::getDomsAsPropertyValues() const
 {
     sal_Int32 length = maMainDomMap.size();
@@ -245,7 +250,7 @@ void loadDiagram( ShapePtr const & pShape,
                   const OUString& rColorStylePath,
                   const oox::core::Relations& rRelations )
 {
-    DiagramPtr pDiagram = std::make_shared<Diagram>();
+    DiagramPtr pDiagram = std::make_shared<Diagram>(pShape);
 
     DiagramDataPtr pData = std::make_shared<DiagramData>();
     pDiagram->setData( pData );
@@ -365,7 +370,7 @@ void loadDiagram(ShapePtr const& pShape,
                  const uno::Reference<xml::dom::XDocument>& colorDom,
                  core::XmlFilterBase& rFilter)
 {
-    DiagramPtr pDiagram = std::make_shared<Diagram>();
+    DiagramPtr pDiagram = std::make_shared<Diagram>(pShape);
 
     pDiagram->setData(pDiagramData);
 
diff --git a/oox/source/drawingml/diagram/diagram.hxx b/oox/source/drawingml/diagram/diagram.hxx
index e7f5cc68378b..25fa10ed0635 100644
--- a/oox/source/drawingml/diagram/diagram.hxx
+++ b/oox/source/drawingml/diagram/diagram.hxx
@@ -49,7 +49,10 @@ typedef std::map<const dgm::Point*, ShapePtr> PresPointShapeMap;
 class DiagramLayout
 {
 public:
-    DiagramLayout(const Diagram& rDgm) : mrDgm(rDgm) {}
+    DiagramLayout(Diagram& rDgm)
+        : mrDgm(rDgm)
+    {
+    }
     void setDefStyle( const OUString & sDefStyle )
         { msDefStyle = sDefStyle; }
     void setMinVer( const OUString & sMinVer )
@@ -60,8 +63,7 @@ public:
         { msTitle = sTitle; }
     void setDesc( const OUString & sDesc )
         { msDesc = sDesc; }
-    const Diagram& getDiagram() const
-        { return mrDgm; }
+    Diagram& getDiagram() { return mrDgm; }
     LayoutNodePtr & getNode()
         { return mpNode; }
     const LayoutNodePtr & getNode() const
@@ -80,7 +82,7 @@ public:
         { return maPresPointShapeMap; }
 
 private:
-    const Diagram& mrDgm;
+    Diagram& mrDgm;
     OUString msDefStyle;
     OUString msMinVer;
     OUString msUniqueId;
@@ -128,6 +130,7 @@ typedef std::map<OUString,DiagramColor> DiagramColorMap;
 class Diagram
 {
 public:
+    explicit Diagram(const ShapePtr& pShape);
     void setData( const DiagramDataPtr & pData )
         { mpData = pData; }
     const DiagramDataPtr& getData() const
@@ -146,7 +149,10 @@ public:
     void addTo( const ShapePtr & pShape );
 
     css::uno::Sequence<css::beans::PropertyValue> getDomsAsPropertyValues() const;
+    ShapePtr getShape() { return mpShape; }
+
 private:
+    ShapePtr mpShape;
     DiagramDataPtr                 mpData;
     DiagramLayoutPtr               mpLayout;
     DiagramQStyleMap               maStyles;
diff --git a/oox/source/drawingml/diagram/diagramlayoutatoms.cxx b/oox/source/drawingml/diagram/diagramlayoutatoms.cxx
index 7493464842ef..d804373017f1 100644
--- a/oox/source/drawingml/diagram/diagramlayoutatoms.cxx
+++ b/oox/source/drawingml/diagram/diagramlayoutatoms.cxx
@@ -216,7 +216,7 @@ namespace
  * Takes the connection list from rLayoutNode, navigates from rFrom on an edge
  * of type nType, using a direction determined by bSourceToDestination.
  */
-OUString navigate(const LayoutNode& rLayoutNode, sal_Int32 nType, const OUString& rFrom,
+OUString navigate(LayoutNode& rLayoutNode, sal_Int32 nType, const OUString& rFrom,
                   bool bSourceToDestination)
 {
     for (const auto& rConnection : rLayoutNode.getDiagram().getData()->getConnections())
@@ -648,6 +648,16 @@ void AlgAtom::layoutShape(const ShapePtr& rShape, const std::vector<Constraint>&
 
                 nVertMin = std::min(aPos.Y, nVertMin);
                 nVertMax = std::max(aPos.Y + aSize.Height, nVertMax);
+
+                NamedShapePairs& rDiagramFontHeights
+                    = getLayoutNode().getDiagram().getShape()->getDiagramFontHeights();
+                auto it = rDiagramFontHeights.find(aCurrShape->getInternalName());
+                if (it != rDiagramFontHeights.end())
+                {
+                    // Internal name matches: put drawingml::Shape to the relevant group, for
+                    // syncronized font height handling.
+                    it->second.insert({ aCurrShape, {} });
+                }
             }
 
             // See if all vertical space is used or we have to center the content.
@@ -942,6 +952,20 @@ void AlgAtom::layoutShape(const ShapePtr& rShape, const std::vector<Constraint>&
                     }
                 }
 
+                if (rConstraint.mnType == XML_primFontSz && rConstraint.mnFor == XML_des
+                    && rConstraint.mnOperator == XML_equ)
+                {
+                    NamedShapePairs& rDiagramFontHeights
+                        = getLayoutNode().getDiagram().getShape()->getDiagramFontHeights();
+                    auto it = rDiagramFontHeights.find(rConstraint.msForName);
+                    if (it == rDiagramFontHeights.end())
+                    {
+                        // Start tracking all shapes with this internal name: they'll have the same
+                        // font height.
+                        rDiagramFontHeights[rConstraint.msForName] = {};
+                    }
+                }
+
                 // TODO: get values from differently named constraints as well
                 if (rConstraint.msForName == "sp" || rConstraint.msForName == "space" || rConstraint.msForName == "sibTrans")
                 {
diff --git a/oox/source/drawingml/diagram/diagramlayoutatoms.hxx b/oox/source/drawingml/diagram/diagramlayoutatoms.hxx
index f36224f0f882..81b96c2207b8 100644
--- a/oox/source/drawingml/diagram/diagramlayoutatoms.hxx
+++ b/oox/source/drawingml/diagram/diagramlayoutatoms.hxx
@@ -259,9 +259,13 @@ class LayoutNode
 public:
     typedef std::map<sal_Int32, OUString> VarMap;
 
-    LayoutNode(const Diagram& rDgm) : LayoutAtom(*this), mrDgm(rDgm), mnChildOrder(0) {}
-    const Diagram& getDiagram() const
-        { return mrDgm; }
+    LayoutNode(Diagram& rDgm)
+        : LayoutAtom(*this)
+        , mrDgm(rDgm)
+        , mnChildOrder(0)
+    {
+    }
+    Diagram& getDiagram() { return mrDgm; }
     virtual void accept( LayoutAtomVisitor& ) override;
     VarMap & variables()
         { return mVariables; }
@@ -288,7 +292,7 @@ public:
     const LayoutNode* getParentLayoutNode() const;
 
 private:
-    const Diagram&               mrDgm;
+    Diagram& mrDgm;
     VarMap                       mVariables;
     OUString                     msMoveWith;
     OUString                     msStyleLabel;
diff --git a/oox/source/drawingml/shape.cxx b/oox/source/drawingml/shape.cxx
index 3e919af5be80..ec162e0ade7c 100644
--- a/oox/source/drawingml/shape.cxx
+++ b/oox/source/drawingml/shape.cxx
@@ -184,6 +184,7 @@ Shape::Shape( const ShapePtr& pSourceShape )
 , mnDataNodeType(pSourceShape->mnDataNodeType)
 , mfAspectRatio(pSourceShape->mfAspectRatio)
 , mbUseBgFill(pSourceShape->mbUseBgFill)
+, maDiagramFontHeights(pSourceShape->maDiagramFontHeights)
 {}
 
 Shape::~Shape()
@@ -294,6 +295,22 @@ void Shape::addShape(
                 if( !SvtFilterOptions::Get().IsSmartArt2Shape() )
                     convertSmartArtToMetafile( rFilterBase );
             }
+
+            NamedShapePairs* pNamedShapePairs = rFilterBase.getDiagramFontHeights();
+            if (xShape.is() && pNamedShapePairs)
+            {
+                auto itPairs = pNamedShapePairs->find(getInternalName());
+                if (itPairs != pNamedShapePairs->end())
+                {
+                    auto it = itPairs->second.find(shared_from_this());
+                    if (it != itPairs->second.end())
+                    {
+                        // Our drawingml::Shape is in the list of an internal name, remember the now
+                        // inserted XShape.
+                        it->second = xShape;
+                    }
+                }
+            }
         }
     }
     catch( const Exception& )
@@ -1545,6 +1562,44 @@ void Shape::keepDiagramCompatibilityInfo()
     }
 }
 
+void Shape::syncDiagramFontHeights()
+{
+    // Each name represents a group of shapes, for which the font height should have the same
+    // scaling.
+    for (const auto& rNameAndPairs : maDiagramFontHeights)
+    {
+        // Find out the minimum scale within this group.
+        const ShapePairs& rShapePairs = rNameAndPairs.second;
+        sal_Int16 nMinScale = 100;
+        for (const auto& rShapePair : rShapePairs)
+        {
+            uno::Reference<beans::XPropertySet> xPropertySet(rShapePair.second, uno::UNO_QUERY);
+            if (xPropertySet.is())
+            {
+                sal_Int16 nTextFitToSizeScale = 0;
+                xPropertySet->getPropertyValue("TextFitToSizeScale") >>= nTextFitToSizeScale;
+                if (nTextFitToSizeScale > 0 && nTextFitToSizeScale < nMinScale)
+                {
+                    nMinScale = nTextFitToSizeScale;
+                }
+            }
+        }
+
+        // Set that minimum scale for all members of the group.
+        if (nMinScale < 100)
+        {
+            for (const auto& rShapePair : rShapePairs)
+            {
+                uno::Reference<beans::XPropertySet> xPropertySet(rShapePair.second, uno::UNO_QUERY);
+                if (xPropertySet.is())
+                {
+                    xPropertySet->setPropertyValue("TextFitToSizeScale", uno::makeAny(nMinScale));
+                }
+            }
+        }
+    }
+}
+
 void Shape::convertSmartArtToMetafile(XmlFilterBase const & rFilterBase)
 {
     try
diff --git a/oox/source/ppt/pptshape.cxx b/oox/source/ppt/pptshape.cxx
index 7e67de80100e..3866909c4b96 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&)