tdf#92796 ODF import: remove unused bitmap fills

With CWS impress64 a partial fix for this was implemented to drop
unreferenced named items including all non-color fills after ODF import,
but this is only done in sd so move the code that does that to svx and
call it from sc and sw as well.

Implement some UNO interface for this, it's at least better than a magic
string, and not obvious how a better solution would look like since it's
known only at the end of the import if a bitmap is used or not.

Another problem: when the Area tab is used to change to a different kind
of fill, the items with the details for the previous fill aren't
cleared, and so they are written to ODF files.  Hence bitmaps in the
file can be referenced even if they aren't actually used, and bloat up
the files.

Fix this by dropping all unused draw:fill-image-name attributes in ODF
import.

Also do the same for Gradient and Hatch fills; Transparency gradients
can be combined with anything so leave them as they are.

Change-Id: I0b591fd9f963d974d0c3e7208b99621ad61dd93c
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/118950
Tested-by: Jenkins
Reviewed-by: Michael Stahl <michael.stahl@allotropia.de>

2 files changed, 55 insertions, 20 deletions

diff --git a/xmloff/source/draw/XMLShapeStyleContext.cxx b/xmloff/source/draw/XMLShapeStyleContext.cxx
index 1da9e11cf074..98191b71c8cd 100644
--- a/xmloff/source/draw/XMLShapeStyleContext.cxx
+++ b/xmloff/source/draw/XMLShapeStyleContext.cxx
@@ -22,6 +22,7 @@
 #include <xmloff/XMLShapeStyleContext.hxx>
 #include <XMLShapePropertySetContext.hxx>
 #include <xmloff/contextid.hxx>
+#include <com/sun/star/drawing/FillStyle.hpp>
 #include <com/sun/star/drawing/XControlShape.hpp>
 #include <com/sun/star/beans/XPropertySet.hpp>
 #include <com/sun/star/beans/XPropertySetInfo.hpp>
@@ -175,18 +176,18 @@ void XMLShapeStyleContext::FillPropertySet( const Reference< beans::XPropertySet
 
     struct ContextID_Index_Pair aContextIDs[] =
     {
-        { CTF_DASHNAME , -1 },
-        { CTF_LINESTARTNAME , -1 },
-        { CTF_LINEENDNAME , -1 },
-        { CTF_FILLGRADIENTNAME, -1 },
-        { CTF_FILLTRANSNAME , -1 },
-        { CTF_FILLHATCHNAME , -1 },
-        { CTF_FILLBITMAPNAME , -1 },
-        { CTF_SD_OLE_VIS_AREA_IMPORT_LEFT, -1 },
-        { CTF_SD_OLE_VIS_AREA_IMPORT_TOP, -1 },
-        { CTF_SD_OLE_VIS_AREA_IMPORT_WIDTH, -1 },
-        { CTF_SD_OLE_VIS_AREA_IMPORT_HEIGHT, -1 },
-        { -1, -1 }
+        { CTF_DASHNAME, -1, drawing::FillStyle::FillStyle_MAKE_FIXED_SIZE },
+        { CTF_LINESTARTNAME, -1, drawing::FillStyle::FillStyle_MAKE_FIXED_SIZE },
+        { CTF_LINEENDNAME, -1, drawing::FillStyle::FillStyle_MAKE_FIXED_SIZE },
+        { CTF_FILLGRADIENTNAME, -1, drawing::FillStyle::FillStyle_GRADIENT },
+        { CTF_FILLTRANSNAME, -1, drawing::FillStyle::FillStyle_MAKE_FIXED_SIZE },
+        { CTF_FILLHATCHNAME, -1, drawing::FillStyle::FillStyle_HATCH },
+        { CTF_FILLBITMAPNAME, -1, drawing::FillStyle::FillStyle_BITMAP },
+        { CTF_SD_OLE_VIS_AREA_IMPORT_LEFT, -1, drawing::FillStyle::FillStyle_MAKE_FIXED_SIZE },
+        { CTF_SD_OLE_VIS_AREA_IMPORT_TOP, -1, drawing::FillStyle::FillStyle_MAKE_FIXED_SIZE },
+        { CTF_SD_OLE_VIS_AREA_IMPORT_WIDTH, -1, drawing::FillStyle::FillStyle_MAKE_FIXED_SIZE },
+        { CTF_SD_OLE_VIS_AREA_IMPORT_HEIGHT, -1, drawing::FillStyle::FillStyle_MAKE_FIXED_SIZE },
+        { -1, -1, drawing::FillStyle::FillStyle_MAKE_FIXED_SIZE }
     };
     static const XmlStyleFamily aFamilies[] =
     {
@@ -243,6 +244,12 @@ void XMLShapeStyleContext::FillPropertySet( const Reference< beans::XPropertySet
                 break;
             }
 
+            if (::xmloff::IsIgnoreFillStyleNamedItem(rPropSet, aContextIDs[i].nExpectedFillStyle))
+            {
+                SAL_INFO("xmloff.style", "ShapeStyleContext: dropping fill named item: " << sStyleName);
+                break; // ignore it, it's not used
+            }
+
             try
             {
 
diff --git a/xmloff/source/draw/ximpstyl.cxx b/xmloff/source/draw/ximpstyl.cxx
index c9449a900b1f..aa1520fe7047 100644
--- a/xmloff/source/draw/ximpstyl.cxx
+++ b/xmloff/source/draw/ximpstyl.cxx
@@ -34,6 +34,7 @@
 #include <com/sun/star/style/XStyle.hpp>
 #include <com/sun/star/lang/XSingleServiceFactory.hpp>
 #include <com/sun/star/presentation/XPresentationPage.hpp>
+#include <com/sun/star/drawing/FillStyle.hpp>
 #include <com/sun/star/drawing/XDrawPages.hpp>
 #include <com/sun/star/container/XNamed.hpp>
 #include <com/sun/star/beans/XPropertySet.hpp>
@@ -138,14 +139,14 @@ public:
 const sal_uInt16 MAX_SPECIAL_DRAW_STYLES = 7;
 ContextID_Index_Pair const g_ContextIDs[MAX_SPECIAL_DRAW_STYLES+1] =
 {
-    { CTF_DASHNAME , -1 },
-    { CTF_LINESTARTNAME , -1 },
-    { CTF_LINEENDNAME , -1 },
-    { CTF_FILLGRADIENTNAME, -1 },
-    { CTF_FILLTRANSNAME , -1 },
-    { CTF_FILLHATCHNAME , -1 },
-    { CTF_FILLBITMAPNAME , -1 },
-    { -1, -1 }
+    { CTF_DASHNAME,         -1, drawing::FillStyle::FillStyle_MAKE_FIXED_SIZE },
+    { CTF_LINESTARTNAME,    -1, drawing::FillStyle::FillStyle_MAKE_FIXED_SIZE },
+    { CTF_LINEENDNAME,      -1, drawing::FillStyle::FillStyle_MAKE_FIXED_SIZE },
+    { CTF_FILLGRADIENTNAME, -1, drawing::FillStyle::FillStyle_GRADIENT},
+    { CTF_FILLTRANSNAME,    -1, drawing::FillStyle::FillStyle_MAKE_FIXED_SIZE },
+    { CTF_FILLHATCHNAME,    -1, drawing::FillStyle::FillStyle_HATCH },
+    { CTF_FILLBITMAPNAME,   -1, drawing::FillStyle::FillStyle_BITMAP },
+    { -1, -1, drawing::FillStyle::FillStyle_MAKE_FIXED_SIZE }
 };
 XmlStyleFamily const g_Families[MAX_SPECIAL_DRAW_STYLES] =
 {
@@ -257,6 +258,13 @@ void XMLDrawingPageStyleContext::FillPropertySet(
             struct XMLPropertyState& rState = GetProperties()[nIndex];
             OUString sStyleName;
             rState.maValue >>= sStyleName;
+
+            if (::xmloff::IsIgnoreFillStyleNamedItem(rPropSet, m_pContextIDs[i].nExpectedFillStyle))
+            {
+                SAL_INFO("xmloff.style", "XMLDrawingPageStyleContext: dropping fill named item: " << sStyleName);
+                break; // ignore it, it's not used
+            }
+
             sStyleName = GetImport().GetStyleDisplayName( m_pFamilies[i],
                                                           sStyleName );
             // get property set mapper
@@ -1422,4 +1430,24 @@ void SdXMLHeaderFooterDeclContext::characters( const OUString& rChars )
     maStrText += rChars;
 }
 
+namespace xmloff {
+
+bool IsIgnoreFillStyleNamedItem(
+        css::uno::Reference<css::beans::XPropertySet> const& xProps,
+        drawing::FillStyle const nExpectedFillStyle)
+{
+    assert(xProps.is());
+    if (nExpectedFillStyle == drawing::FillStyle::FillStyle_MAKE_FIXED_SIZE)
+    {
+        return false;
+    }
+
+    // note: the caller must have called FillPropertySet() previously
+    drawing::FillStyle fillStyle{drawing::FillStyle_NONE};
+    xProps->getPropertyValue("FillStyle") >>= fillStyle;
+    return fillStyle != nExpectedFillStyle;
+}
+
+} // namespace xmloff
+
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */