lokit: unify fill transparency items

Online just listens to .uno:FillFloatTransparence but the set-item
in core it corresponds to, does not represent the fill-transparency
types like 'None' and 'Solid'. This is represented by another item
called XFillTransparencyItem. As a result the mobile wizard does not
show the correct transparency fill type always.
To solve this, this patch encodes the constant transparency percentage
in case of Solid and None(always 0%) as an intensity and stores this
info in the statechange message of .uno:FillFloatTransparence whenever
there is no gradient type and corrects the 'style' attribute of the
message appropriately.

More detailed information is provided as comments at appropriate
places in the patch.

Change-Id: I443ef4ce349badf28f6c2c702b1014868d9c6ed5
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/90878
Tested-by: Jenkins CollaboraOffice <jenkinscollaboraoffice@gmail.com>
Reviewed-by: Andras Timar <andras.timar@collabora.com>

2 files changed, 53 insertions, 0 deletions

diff --git a/svx/source/xoutdev/xattr.cxx b/svx/source/xoutdev/xattr.cxx
index 83e052231b58..1de52ad51ee5 100644
--- a/svx/source/xoutdev/xattr.cxx
+++ b/svx/source/xoutdev/xattr.cxx
@@ -2532,6 +2532,19 @@ boost::property_tree::ptree XFillFloatTransparenceItem::dumpAsJSON() const
     boost::property_tree::ptree aTree = XFillGradientItem::dumpAsJSON();
     aTree.put("commandName", ".uno:FillFloatTransparence");
 
+    if (!bEnabled)
+    {
+        boost::property_tree::ptree& rState = aTree.get_child("state");
+        // When gradient fill is disabled, the intensity fields contain the
+        // constant encoded percent-transparency. However we use that here to just
+        // distinguish between 'None' and 'Solid' types and correct the 'style'
+        // property appropriately.
+        if (GetGradientValue().GetStartIntens() == 100)
+            rState.put("style", "NONE");
+        else
+            rState.put("style", "SOLID");
+    }
+
     return aTree;
 }
 
diff --git a/sw/source/uibase/shells/drawdlg.cxx b/sw/source/uibase/shells/drawdlg.cxx
index 8b42f0ebb732..66176aca79e6 100644
--- a/sw/source/uibase/shells/drawdlg.cxx
+++ b/sw/source/uibase/shells/drawdlg.cxx
@@ -40,6 +40,8 @@
 #include <svx/xflclit.hxx>
 #include <svx/xfillit0.hxx>
 #include <svx/xflgrit.hxx>
+#include <svx/xflftrit.hxx>
+#include <svx/xfltrit.hxx>
 #include <comphelper/lok.hxx>
 #include <LibreOfficeKit/LibreOfficeKitEnums.h>
 
@@ -320,6 +322,40 @@ void SwDrawShell::ExecDrawAttrArgs(SfxRequest const & rReq)
             pView->GetModel()->SetChanged();
 }
 
+void lcl_unifyFillTransparencyItems(SfxItemSet& rSet)
+{
+    // Transparent fill options are None, Solid, Linear, Axial, Radial, Elliptical, Quadratic, Square.
+    // But this is represented across two items namely XFillTransparenceItem (for None and Solid)
+    // and XFillFloatTransparenceItem (for the rest). To simplify the representation in LOKit case let's
+    // use XFillFloatTransparenceItem to carry the information of XFillTransparenceItem when gradients
+    // are disabled. When gradient transparency is disabled, all fields of XFillFloatTransparenceItem are invalid
+    // and not used. So convert XFillTransparenceItem's constant transparency percentage as an intensity
+    // and assign this to the XFillFloatTransparenceItem's start-intensity and end-intensity fields.
+    // Now the LOK clients need only listen to statechange messages of XFillFloatTransparenceItem
+    // to get fill-transparency settings instead of listening to two separate items.
+
+    XFillFloatTransparenceItem* pFillFloatTranspItem =
+        const_cast<XFillFloatTransparenceItem*>
+        (rSet.GetItem<XFillFloatTransparenceItem>(XATTR_FILLFLOATTRANSPARENCE));
+    if (!pFillFloatTranspItem || pFillFloatTranspItem->IsEnabled())
+        return;
+
+    const XFillTransparenceItem* pFillTranspItem =
+        rSet.GetItem<XFillTransparenceItem>(XATTR_FILLTRANSPARENCE);
+
+    if (!pFillTranspItem)
+        return;
+
+    XGradient aTmpGradient = pFillFloatTranspItem->GetGradientValue();
+    sal_uInt16 nTranspPercent = pFillTranspItem->GetValue();
+    // Encode transparancy percentage as intensity
+    sal_uInt16 nIntensity = 100 - std::min<sal_uInt16>
+        (std::max<sal_uInt16>(nTranspPercent, 0), 100);
+    aTmpGradient.SetStartIntens(nIntensity);
+    aTmpGradient.SetEndIntens(nIntensity);
+    pFillFloatTranspItem->SetGradientValue(aTmpGradient);
+}
+
 void SwDrawShell::GetDrawAttrState(SfxItemSet& rSet)
 {
     SdrView* pSdrView = GetShell().GetDrawView();
@@ -329,7 +365,11 @@ void SwDrawShell::GetDrawAttrState(SfxItemSet& rSet)
         bool bDisable = Disable( rSet );
 
         if( !bDisable )
+        {
             pSdrView->GetAttributes( rSet );
+            if (comphelper::LibreOfficeKit::isActive())
+                lcl_unifyFillTransparencyItems(rSet);
+        }
     }
     else
         rSet.Put(pSdrView->GetDefaultAttr());