tdf#149748 sd theme: fix crash on selecting none from color bar

Opening Impress, going to view -> color bar to enable it and then
clicking on "none" resulted in a crash.

This went wrong in commit f5db3b12ae1cd3bfe6ee5d260aec9532cc65f2dc (sd
theme: add UI (sidebar) for shape fill color, 2022-04-06), where I
assumed that in case the slot is a SID_ATTR_FILL_COLOR, then its item
set also has a SID_ATTR_FILL_COLOR key. This is usually true, but not in
case of "no color" (i.e. transparent).

Fix the problem by just skipping theming metadata for such a color.

It seems to me that the color set of a theme is not allowed to contain
such "no color" colors, so this should be safe.

(cherry picked from commit c09eb0f74c0a110e4a4cfc4783b59883aad30475)

Conflicts:
	sd/qa/unit/uiimpress.cxx

Change-Id: I3fb65548dca1d78631311de56c15fdb655b9645a
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/136751
Tested-by: Jenkins CollaboraOffice <jenkinscollaboraoffice@gmail.com>
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>

2 files changed, 33 insertions, 16 deletions

diff --git a/sd/qa/unit/uiimpress.cxx b/sd/qa/unit/uiimpress.cxx
index 9b58251ffc93..23fabc297d86 100644
--- a/sd/qa/unit/uiimpress.cxx
+++ b/sd/qa/unit/uiimpress.cxx
@@ -960,6 +960,21 @@ CPPUNIT_TEST_FIXTURE(SdUiImpressTest, testFillColorTheme)
     CPPUNIT_ASSERT_EQUAL(static_cast<sal_Int16>(6000), nFillColorLumOff);
 }
 
+CPPUNIT_TEST_FIXTURE(SdUiImpressTest, testFillColorNoColor)
+{
+    // Given an empty Impress document:
+    mxComponent = loadFromDesktop("private:factory/simpress",
+                                  "com.sun.star.presentation.PresentationDocument");
+    auto pImpressDocument = dynamic_cast<SdXImpressDocument*>(mxComponent.get());
+    sd::ViewShell* pViewShell = pImpressDocument->GetDocShell()->GetViewShell();
+    SfxDispatcher* pDispatcher = pViewShell->GetViewFrame()->GetDispatcher();
+
+    // When dispatching a fill color that only has a fill style (no color), then make sure we don't
+    // crash:
+    XFillStyleItem aXFillStyleItem(drawing::FillStyle_NONE);
+    pDispatcher->ExecuteList(SID_ATTR_FILL_COLOR, SfxCallMode::RECORD, { &aXFillStyleItem });
+}
+
 CPPUNIT_TEST_FIXTURE(SdUiImpressTest, testThemeShapeInsert)
 {
     // Given a document with a theme, accent1 color is set to 0x000004:
diff --git a/sd/source/ui/view/drviews2.cxx b/sd/source/ui/view/drviews2.cxx
index 02a3e3364c1c..5ca1f2d9c50a 100644
--- a/sd/source/ui/view/drviews2.cxx
+++ b/sd/source/ui/view/drviews2.cxx
@@ -598,24 +598,26 @@ public:
         {
             // Merge the color parameters to the color itself.
             const XFillColorItem* pColorItem = static_cast<const XFillColorItem*>(pArgs->GetItem(SID_ATTR_FILL_COLOR));
-            assert(pColorItem);
-            XFillColorItem aColorItem(*pColorItem);
-            if (pArgs->GetItemState(SID_ATTR_COLOR_THEME_INDEX, false, &pItem) == SfxItemState::SET)
+            if (pColorItem)
             {
-                auto pIntItem = static_cast<const SfxInt16Item*>(pItem);
-                aColorItem.GetThemeColor().SetThemeIndex(pIntItem->GetValue());
-            }
-            if (pArgs->GetItemState(SID_ATTR_COLOR_LUM_MOD, false, &pItem) == SfxItemState::SET)
-            {
-                auto pIntItem = static_cast<const SfxInt16Item*>(pItem);
-                aColorItem.GetThemeColor().SetLumMod(pIntItem->GetValue());
-            }
-            if (pArgs->GetItemState(SID_ATTR_COLOR_LUM_OFF, false, &pItem) == SfxItemState::SET)
-            {
-                auto pIntItem = static_cast<const SfxInt16Item*>(pItem);
-                aColorItem.GetThemeColor().SetLumOff(pIntItem->GetValue());
+                XFillColorItem aColorItem(*pColorItem);
+                if (pArgs->GetItemState(SID_ATTR_COLOR_THEME_INDEX, false, &pItem) == SfxItemState::SET)
+                {
+                    auto pIntItem = static_cast<const SfxInt16Item*>(pItem);
+                    aColorItem.GetThemeColor().SetThemeIndex(pIntItem->GetValue());
+                }
+                if (pArgs->GetItemState(SID_ATTR_COLOR_LUM_MOD, false, &pItem) == SfxItemState::SET)
+                {
+                    auto pIntItem = static_cast<const SfxInt16Item*>(pItem);
+                    aColorItem.GetThemeColor().SetLumMod(pIntItem->GetValue());
+                }
+                if (pArgs->GetItemState(SID_ATTR_COLOR_LUM_OFF, false, &pItem) == SfxItemState::SET)
+                {
+                    auto pIntItem = static_cast<const SfxInt16Item*>(pItem);
+                    aColorItem.GetThemeColor().SetLumOff(pIntItem->GetValue());
+                }
+                pArgs->Put(aColorItem);
             }
-            pArgs->Put(aColorItem);
         }
     }
 }