Document Colors do not show any color in the Palette

same is true for "Theme Colors", a problem since:

commit 4ccc2f0e3f45c9d78f74b1848851bedf71f7382d
Date:   Fri Mar 1 22:11:14 2024 +0200

    cool#8327 use tools::JsonWriter for theme colors

Change-Id: Ibaab5df197bd8005037e066181e8a50bdda5ceda
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/164658
Tested-by: Jenkins CollaboraOffice <jenkinscollaboraoffice@gmail.com>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/164669
Tested-by: Jenkins

include/tools/json_writer.hxx

@@ -46,6 +46,7 @@ public:
 
     [[nodiscard]] ScopedJsonWriterNode<'}'> startNode(std::string_view nodeName);
     [[nodiscard]] ScopedJsonWriterNode<']'> startArray(std::string_view nodeName);
+    [[nodiscard]] ScopedJsonWriterNode<']'> startAnonArray();
     [[nodiscard]] ScopedJsonWriterNode<'}'> startStruct();
 
     void put(std::u16string_view pPropName, std::u16string_view rPropValue);

svx/source/tbxctrls/PaletteManager.cxx

@@ -480,8 +480,7 @@ void PaletteManager::generateJSON(tools::JsonWriter& aTree, const std::set<Color
     auto aColorIt = rColors.begin();
     while (aColorIt != rColors.end())
     {
-        auto aColorRowTree = aTree.startStruct();
-        auto aColorRowTree2 = aTree.startArray("");
+        auto aColorRowTree = aTree.startAnonArray();
 
         for (sal_uInt32 nColumn = 0; nColumn < nColumnCount; nColumn++)
         {

svx/source/theme/ThemeColorPaletteManager.cxx

@@ -134,9 +134,11 @@ void ThemeColorPaletteManager::generateJSON(tools::JsonWriter& aTree)
 
     for (size_t nEffect = 0; nEffect < 6; ++nEffect)
     {
-        auto aColorRowTree = aTree.startStruct();
+        auto aColorRowTree = aTree.startAnonArray();
         for (size_t nIndex = 0; nIndex < 12; ++nIndex)
         {
+            auto aColorTree = aTree.startStruct();
+
             auto const& rColorData = aThemePaletteCollection.maColors[nIndex];
             auto const& rEffectData = rColorData.maEffects[nEffect];
 

tools/source/misc/json_writer.cxx

@@ -74,6 +74,16 @@ JsonWriter::ScopedJsonWriterNode<']'> JsonWriter::startArray(std::string_view pN
     return { *this };
 }
 
+JsonWriter::ScopedJsonWriterNode<']'> JsonWriter::startAnonArray()
+{
+    putRaw("[ ");
+
+    mStartNodeCount++;
+    mbFirstFieldInNode = true;
+
+    return { *this };
+}
+
 JsonWriter::ScopedJsonWriterNode<'}'> JsonWriter::startStruct()
 {
     putRaw("{ ");