svx UNO API for shapes: expose what scaling factor is used for autofit scaling

TextFitToSizeScale is 0 when the shape has no text or autofit is not
enabled, 100 when there is autofit (but no scale-down), a value between
the two otherwise.

Towards allowing both "autofit" and "same font size for these shapes" at
the same time for SmartArt purposes.

(cherry picked from commit cd268f0047443ddbb22361cdc15093e881f83588)

Conflicts:
include/svx/unoshprp.hxx
svx/source/unodraw/unoshape.cxx

Change-Id: Iff88fcc4c2e67b543687b1d87d614622cbf2e38a

3 files changed, 37 insertions, 2 deletions

diff --git a/include/svl/solar.hrc b/include/svl/solar.hrc
index 6b4cb07bbc33..317d45a84bc1 100644
--- a/include/svl/solar.hrc
+++ b/include/svl/solar.hrc
@@ -23,7 +23,7 @@
 // defines ------------------------------------------------------------------
 
 #define OWN_ATTR_VALUE_START                    3900
-#define OWN_ATTR_VALUE_END                      4004
+#define OWN_ATTR_VALUE_END                      4005
 
 #define RID_LIB_START               10000
 #define RID_LIB_END                 19999
diff --git a/include/svx/unoshprp.hxx b/include/svx/unoshprp.hxx
index 9aa2ecb16dae..8051634c3e42 100644
--- a/include/svx/unoshprp.hxx
+++ b/include/svx/unoshprp.hxx
@@ -192,7 +192,8 @@
 #define OWN_ATTR_SIGNATURELINE_UNSIGNED_IMAGE   (OWN_ATTR_VALUE_START+102)
 #define OWN_ATTR_SIGNATURELINE_IS_SIGNED        (OWN_ATTR_VALUE_START+103)
 #define OWN_ATTR_QRCODE                         (OWN_ATTR_VALUE_START+104)
-// ATTENTION: maximum is OWN_ATTR_VALUE_START+104 svx, see include/svl/solar.hrc
+#define OWN_ATTR_TEXTFITTOSIZESCALE             (OWN_ATTR_VALUE_START+105)
+// ATTENTION: maximum is OWN_ATTR_VALUE_START+105 svx, see include/svl/solar.hrc
 
 // #FontWork#
 #define FONTWORK_PROPERTIES \
@@ -348,6 +349,7 @@
     { OUString(UNO_NAME_MISC_OBJ_SIZEPROTECT),  SDRATTR_OBJSIZEPROTECT          , cppu::UnoType<bool>::get(),                      0,  0},\
     { OUString("UINameSingular"),               OWN_ATTR_UINAME_SINGULAR        , ::cppu::UnoType<OUString>::get(),    css::beans::PropertyAttribute::READONLY,   0}, \
     { OUString("UINamePlural"),                 OWN_ATTR_UINAME_PLURAL          , ::cppu::UnoType<OUString>::get(),    css::beans::PropertyAttribute::READONLY,   0}, \
+    { OUString("TextFitToSizeScale"), OWN_ATTR_TEXTFITTOSIZESCALE, ::cppu::UnoType<sal_Int16>::get(), css::beans::PropertyAttribute::READONLY, 0}, \
     /* #i68101# */ \
     { OUString(UNO_NAME_MISC_OBJ_TITLE),        OWN_ATTR_MISC_OBJ_TITLE         , ::cppu::UnoType<OUString>::get(),    0,  0}, \
     { OUString(UNO_NAME_MISC_OBJ_DESCRIPTION),  OWN_ATTR_MISC_OBJ_DESCRIPTION   , ::cppu::UnoType<OUString>::get(),    0,  0},
diff --git a/svx/source/unodraw/unoshape.cxx b/svx/source/unodraw/unoshape.cxx
index 2bab0013c112..7802e5dde0fa 100644
--- a/svx/source/unodraw/unoshape.cxx
+++ b/svx/source/unodraw/unoshape.cxx
@@ -83,6 +83,8 @@
 #include <vcl/gdimtf.hxx>
 #include <vcl/wmf.hxx>
 #include <svx/svdopath.hxx>
+#include <svx/sdtfsitm.hxx>
+#include <svx/svdoutl.hxx>
 
 #include <memory>
 #include <vector>
@@ -166,6 +168,31 @@ protected:
     }
 };
 
+/// Calculates what scaling factor will be used for autofit text scaling of this shape.
+sal_Int16 GetTextFitToSizeScale(SdrObject* pObject)
+{
+    SdrTextObj* pTextObj = dynamic_cast<SdrTextObj*>(pObject);
+    if (!pTextObj)
+    {
+        return 0;
+    }
+
+    const SfxItemSet& rTextObjSet = pTextObj->GetMergedItemSet();
+    if (rTextObjSet.GetItem<SdrTextFitToSizeTypeItem>(SDRATTR_TEXT_FITTOSIZE)->GetValue()
+        != drawing::TextFitToSizeType_AUTOFIT)
+    {
+        return 0;
+    }
+
+    std::unique_ptr<SdrOutliner> pOutliner
+        = pTextObj->getSdrModelFromSdrObject().createOutliner(OutlinerMode::TextObject);
+    tools::Rectangle aBoundRect(pTextObj->GetCurrentBoundRect());
+    pTextObj->SetupOutlinerFormatting(*pOutliner, aBoundRect);
+    sal_uInt16 nX = 0;
+    sal_uInt16 nY = 0;
+    pOutliner->GetGlobalCharStretching(nX, nY);
+    return nY;
+}
 }
 
 SvxShape::SvxShape( SdrObject* pObject )
@@ -2848,6 +2875,12 @@ bool SvxShape::getPropertyValueImpl( const OUString&, const SfxItemPropertySimpl
         break;
     }
 
+    case OWN_ATTR_TEXTFITTOSIZESCALE:
+    {
+        rValue <<= GetTextFitToSizeScale(GetSdrObject());
+        break;
+    }
+
     case OWN_ATTR_UINAME_PLURAL:
     {
         rValue <<= GetSdrObject()->TakeObjNamePlural();