use tools::JsonWriter for dumping property tree

Change-Id: I8f55af19ba10b71bd621e69b27000ab7cb565309
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/96677
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

44 files changed, 316 insertions, 302 deletions

diff --git a/desktop/source/lib/init.cxx b/desktop/source/lib/init.cxx
index 075ca30a08b9..20ec8c0caccf 100644
--- a/desktop/source/lib/init.cxx
+++ b/desktop/source/lib/init.cxx
@@ -4769,7 +4769,7 @@ static char* getTrackedChanges(LibreOfficeKitDocument* pThis)
         {
             uno::Reference<beans::XPropertySet> xRedline(xRedlines->nextElement(), uno::UNO_QUERY);
             auto redlineNode = aJson.startNode("");
-            aJson.put("index", nIndex);
+            aJson.put("index", static_cast<sal_Int32>(nIndex));
 
             OUString sAuthor;
             xRedline->getPropertyValue("RedlineAuthor") >>= sAuthor;
diff --git a/include/sfx2/sidebar/Deck.hxx b/include/sfx2/sidebar/Deck.hxx
index 21e7dfad5be7..e8f00b6c7f65 100644
--- a/include/sfx2/sidebar/Deck.hxx
+++ b/include/sfx2/sidebar/Deck.hxx
@@ -69,7 +69,7 @@ public:
     virtual bool EventNotify(NotifyEvent& rEvent) override;
     virtual void Resize() override;
 
-    virtual boost::property_tree::ptree DumpAsPropertyTree() override;
+    virtual void DumpAsPropertyTree(tools::JsonWriter&) override;
 
     static void PrintWindowSubTree (vcl::Window* pRoot, int nIndentation);
 
diff --git a/include/sfx2/sidebar/Panel.hxx b/include/sfx2/sidebar/Panel.hxx
index cae82bbc1d08..ee635220cf55 100644
--- a/include/sfx2/sidebar/Panel.hxx
+++ b/include/sfx2/sidebar/Panel.hxx
@@ -69,7 +69,7 @@ public:
     virtual void Resize() override;
     virtual void DataChanged (const DataChangedEvent& rEvent) override;
     virtual void ApplySettings(vcl::RenderContext& rRenderContext) override;
-    virtual boost::property_tree::ptree DumpAsPropertyTree() override;
+    virtual void DumpAsPropertyTree(tools::JsonWriter&) override;
 
 private:
     const OUString msPanelId;
diff --git a/include/svtools/ctrlbox.hxx b/include/svtools/ctrlbox.hxx
index 301a9c13047f..4b5035fbdec4 100644
--- a/include/svtools/ctrlbox.hxx
+++ b/include/svtools/ctrlbox.hxx
@@ -373,7 +373,7 @@ public:
     void grab_focus() { m_xComboBox->grab_focus(); }
     bool has_focus() const { return m_xComboBox->has_focus(); }
     void connect_entry_activate(const Link<weld::ComboBox&, bool>& rLink) { m_xComboBox->connect_entry_activate(rLink); }
-    void connect_get_property_tree(const Link<boost::property_tree::ptree&, void>& rLink) { m_xComboBox->connect_get_property_tree(rLink); }
+    void connect_get_property_tree(const Link<tools::JsonWriter&, void>& rLink) { m_xComboBox->connect_get_property_tree(rLink); }
     void set_entry_width_chars(int nWidth) { m_xComboBox->set_entry_width_chars(nWidth); }
     void set_size_request(int nWidth, int nHeight) { m_xComboBox->set_size_request(nWidth, nHeight); }
     int get_max_mru_count() { return m_xComboBox->get_max_mru_count(); }
@@ -486,7 +486,7 @@ public:
     bool has_focus() const { return m_xComboBox->has_focus(); }
     void connect_entry_activate(const Link<weld::ComboBox&, bool>& rLink) { m_xComboBox->connect_entry_activate(rLink); }
     void disable_entry_completion() { m_xComboBox->set_entry_completion(false, false); }
-    void connect_get_property_tree(const Link<boost::property_tree::ptree&, void>& rLink) { m_xComboBox->connect_get_property_tree(rLink); }
+    void connect_get_property_tree(const Link<tools::JsonWriter&, void>& rLink) { m_xComboBox->connect_get_property_tree(rLink); }
 
 private:
     FontSizeBox(const FontSizeBox&) = delete;
diff --git a/include/svx/fillctrl.hxx b/include/svx/fillctrl.hxx
index b896fdae76e2..b81dfb417086 100644
--- a/include/svx/fillctrl.hxx
+++ b/include/svx/fillctrl.hxx
@@ -88,7 +88,7 @@ private:
     DECL_LINK(AttrKeyInputHdl, const KeyEvent&, bool);
     DECL_LINK(TypeKeyInputHdl, const KeyEvent&, bool);
     DECL_LINK(ColorKeyInputHdl, const KeyEvent&, bool);
-    DECL_STATIC_LINK(FillControl, DumpAsPropertyTreeHdl, boost::property_tree::ptree&, void);
+    DECL_STATIC_LINK(FillControl, DumpAsPropertyTreeHdl, tools::JsonWriter&, void);
     DECL_LINK(AttrFocusHdl, weld::Widget&, void);
     DECL_LINK(TypeFocusHdl, weld::Widget&, void);
 
diff --git a/include/tools/json_writer.hxx b/include/tools/json_writer.hxx
index c15c4b7401da..3b27a18833f3 100644
--- a/include/tools/json_writer.hxx
+++ b/include/tools/json_writer.hxx
@@ -52,7 +52,18 @@ public:
     void put(const char* pPropName, const OUString& rPropValue);
     void put(const char* pPropName, const OString& rPropValue);
     void put(const char* pPropName, const char* pPropVal);
-    void put(const char*, int);
+    void put(const char* pPropName, const std::string& rPropValue)
+    {
+        put(pPropName, rPropValue.data());
+    }
+
+    void put(const char* pPropName, sal_uInt16 nPropVal) { put(pPropName, sal_Int64(nPropVal)); }
+    void put(const char* pPropName, sal_Int16 nPropVal) { put(pPropName, sal_Int64(nPropVal)); }
+    void put(const char* pPropName, sal_Int32 nPropVal) { put(pPropName, sal_Int64(nPropVal)); }
+    void put(const char* pPropName, sal_uInt32 nPropVal) { put(pPropName, sal_Int64(nPropVal)); }
+    void put(const char* pPropName, sal_Int64);
+    void put(const char* pPropName, bool);
+    void put(const char* pPropName, double);
 
     /// This assumes that this data belongs at this point in the stream, and is valid, and properly encoded
     void putRaw(const rtl::OStringBuffer&);
@@ -61,6 +72,10 @@ public:
      * after this no more document modifications may be written. */
     char* extractData();
     OString extractAsOString();
+    std::string extractAsStdString();
+
+    /** returns true if the current JSON data matches the string */
+    bool isDataEquals(const std::string&);
 
 private:
     void endNode();
diff --git a/include/vcl/button.hxx b/include/vcl/button.hxx
index 1d062581a355..3f998d5d6402 100644
--- a/include/vcl/button.hxx
+++ b/include/vcl/button.hxx
@@ -92,7 +92,7 @@ public:
 
     virtual FactoryFunction GetUITestFactory() const override;
 
-    virtual boost::property_tree::ptree DumpAsPropertyTree() override;
+    virtual void DumpAsPropertyTree(tools::JsonWriter&) override;
 
 protected:
 
@@ -330,7 +330,7 @@ public:
     virtual void ShowFocus(const tools::Rectangle& rRect) override;
 
     /// Button hes additional stuff that we need to dump too.
-    boost::property_tree::ptree DumpAsPropertyTree() override;
+    void DumpAsPropertyTree(tools::JsonWriter&) override;
 
     virtual FactoryFunction GetUITestFactory() const override;
 };
@@ -421,7 +421,7 @@ public:
     virtual void ShowFocus(const tools::Rectangle& rRect) override;
 
     /// Button hes additional stuff that we need to dump too.
-    boost::property_tree::ptree DumpAsPropertyTree() override;
+    void DumpAsPropertyTree(tools::JsonWriter&) override;
 
     virtual FactoryFunction GetUITestFactory() const override;
 };
diff --git a/include/vcl/field.hxx b/include/vcl/field.hxx
index 24a6eab793b3..92cfbbfac65b 100644
--- a/include/vcl/field.hxx
+++ b/include/vcl/field.hxx
@@ -366,7 +366,7 @@ public:
     virtual bool            set_property(const OString &rKey, const OUString &rValue) override;
     virtual void            dispose() override;
 
-    virtual boost::property_tree::ptree DumpAsPropertyTree() override;
+    virtual void DumpAsPropertyTree(tools::JsonWriter&) override;
 };
 
 class UNLESS_MERGELIBS(VCL_DLLPUBLIC) DateField : public SpinField, public DateFormatter
diff --git a/include/vcl/fmtfield.hxx b/include/vcl/fmtfield.hxx
index c61aca9170c1..be6c82ff003a 100644
--- a/include/vcl/fmtfield.hxx
+++ b/include/vcl/fmtfield.hxx
@@ -237,7 +237,7 @@ public:
     void    UseInputStringForFormatting();
     bool    IsUsingInputStringForFormatting() const { return m_bUseInputStringForFormatting;}
 
-    virtual boost::property_tree::ptree DumpAsPropertyTree() override;
+    virtual void DumpAsPropertyTree(tools::JsonWriter&) override;
 
     virtual FactoryFunction GetUITestFactory() const override;
 
diff --git a/include/vcl/layout.hxx b/include/vcl/layout.hxx
index 9caa0c86a0e4..cee1621f2f3b 100644
--- a/include/vcl/layout.hxx
+++ b/include/vcl/layout.hxx
@@ -104,7 +104,7 @@ public:
         return m_bVerticalContainer;
     }
     virtual bool set_property(const OString &rKey, const OUString &rValue) override;
-    virtual boost::property_tree::ptree DumpAsPropertyTree() override;
+    virtual void DumpAsPropertyTree(tools::JsonWriter&) override;
 protected:
     virtual sal_uInt16 getDefaultAccessibleRole() const override;
     void accumulateMaxes(const Size &rChildSize, Size &rSize) const;
@@ -335,7 +335,7 @@ private:
     Size calculateRequisitionForSpacings(sal_Int32 nRowSpacing, sal_Int32 nColSpacing) const;
     virtual Size calculateRequisition() const override;
     virtual void setAllocation(const Size &rAllocation) override;
-    virtual boost::property_tree::ptree DumpAsPropertyTree() override;
+    virtual void DumpAsPropertyTree(tools::JsonWriter&) override;
 public:
     VclGrid(vcl::Window *pParent)
         : VclContainer(pParent)
@@ -447,7 +447,7 @@ public:
     virtual const vcl::Window *get_child() const override;
     vcl::Window *get_label_widget();
     const vcl::Window *get_label_widget() const;
-    virtual boost::property_tree::ptree DumpAsPropertyTree() override;
+    virtual void DumpAsPropertyTree(tools::JsonWriter&) override;
 private:
     virtual Size calculateRequisition() const override;
     virtual void setAllocation(const Size &rAllocation) override;
@@ -807,7 +807,7 @@ public:
         m_xTransferHelper = rHelper;
         m_nDragAction = eDNDConstants;
     }
-    boost::property_tree::ptree DumpAsPropertyTree() override;
+    virtual void DumpAsPropertyTree(tools::JsonWriter&) override;
 };
 
 //Get first window of a pTopLevel window as
diff --git a/include/vcl/tabctrl.hxx b/include/vcl/tabctrl.hxx
index d35f0d76aa8e..798b5ac370dd 100644
--- a/include/vcl/tabctrl.hxx
+++ b/include/vcl/tabctrl.hxx
@@ -187,7 +187,7 @@ public:
 
     virtual void queue_resize(StateChangedType eReason = StateChangedType::Layout) override;
 
-    virtual boost::property_tree::ptree DumpAsPropertyTree() override;
+    virtual void DumpAsPropertyTree(tools::JsonWriter&) override;
 };
 
 class NotebookBar;
diff --git a/include/vcl/toolbox.hxx b/include/vcl/toolbox.hxx
index e60fb64296da..6987f777b00a 100644
--- a/include/vcl/toolbox.hxx
+++ b/include/vcl/toolbox.hxx
@@ -506,7 +506,7 @@ public:
 
     void SetLineSpacing(bool b) { mbLineSpacing = b; }
 
-    virtual boost::property_tree::ptree DumpAsPropertyTree() override;
+    virtual void DumpAsPropertyTree(tools::JsonWriter&) override;
 };
 
 inline void ToolBox::CheckItem( sal_uInt16 nItemId, bool bCheck )
diff --git a/include/vcl/toolkit/field.hxx b/include/vcl/toolkit/field.hxx
index e78b174e74a5..dacaed6f0386 100644
--- a/include/vcl/toolkit/field.hxx
+++ b/include/vcl/toolkit/field.hxx
@@ -101,7 +101,7 @@ public:
     virtual bool            set_property(const OString &rKey, const OUString &rValue) override;
     virtual void            dispose() override;
 
-    virtual boost::property_tree::ptree DumpAsPropertyTree() override;
+    virtual void DumpAsPropertyTree(tools::JsonWriter&) override;
     virtual FactoryFunction GetUITestFactory() const override;
 };
 
diff --git a/include/vcl/toolkit/lstbox.hxx b/include/vcl/toolkit/lstbox.hxx
index 7ae5c9931189..01f76b58a3bd 100644
--- a/include/vcl/toolkit/lstbox.hxx
+++ b/include/vcl/toolkit/lstbox.hxx
@@ -254,7 +254,7 @@ public:
 
     virtual FactoryFunction GetUITestFactory() const override;
 
-    virtual boost::property_tree::ptree DumpAsPropertyTree() override;
+    virtual void DumpAsPropertyTree(tools::JsonWriter&) override;
 };
 
 class UNLESS_MERGELIBS(VCL_DLLPUBLIC) MultiListBox final : public ListBox
diff --git a/include/vcl/weld.hxx b/include/vcl/weld.hxx
index 2e0134a8c4a4..fe03d0ed3958 100644
--- a/include/vcl/weld.hxx
+++ b/include/vcl/weld.hxx
@@ -27,8 +27,6 @@
 #include <com/sun/star/accessibility/XAccessibleRelationSet.hpp>
 #include <com/sun/star/accessibility/XAccessible.hpp>
 
-#include <boost/property_tree/ptree_fwd.hpp>
-
 #include <assert.h>
 #include <memory>
 #include <vector>
@@ -76,6 +74,10 @@ namespace vcl
 class ILibreOfficeKitNotifier;
 typedef OutputDevice RenderContext;
 }
+namespace tools
+{
+class JsonWriter;
+}
 
 namespace weld
 {
@@ -264,8 +266,7 @@ public:
 
     virtual css::uno::Reference<css::datatransfer::dnd::XDropTarget> get_drop_target() = 0;
 
-    virtual void connect_get_property_tree(const Link<boost::property_tree::ptree&, void>& rLink)
-        = 0;
+    virtual void connect_get_property_tree(const Link<tools::JsonWriter&, void>& rLink) = 0;
 
     // render the widget to an output device
     virtual void draw(VirtualDevice& rOutput) = 0;
diff --git a/include/vcl/window.hxx b/include/vcl/window.hxx
index 0ba3dc325b83..c4cd34f52513 100644
--- a/include/vcl/window.hxx
+++ b/include/vcl/window.hxx
@@ -34,8 +34,6 @@
 #include <com/sun/star/uno/Reference.hxx>
 #include <memory>
 
-#include <boost/property_tree/ptree_fwd.hpp>
-
 class VirtualDevice;
 struct ImplSVEvent;
 struct ImplWinData;
@@ -101,6 +99,7 @@ namespace svt { class PopupWindowControllerImpl; }
 namespace weld { class Window; }
 
 template<class T> class VclPtr;
+namespace tools { class JsonWriter; }
 
 enum class TrackingEventFlags
 {
@@ -1212,7 +1211,7 @@ public:
     static bool                         IsLOKWindowsEmpty();
 
     /// Dumps itself and potentially its children to a property tree, to be written easily to JSON.
-    virtual boost::property_tree::ptree DumpAsPropertyTree();
+    virtual void DumpAsPropertyTree(tools::JsonWriter&);
 
     /// Same as MouseButtonDown(), but coordinates are in logic unit. used for LOK
     virtual void LogicMouseButtonDown(const MouseEvent&) {};
@@ -1575,7 +1574,7 @@ public:
     void SetHelpHdl(const Link<vcl::Window&, bool>& rLink);
     void SetMnemonicActivateHdl(const Link<vcl::Window&, bool>& rLink);
     void SetModalHierarchyHdl(const Link<bool, void>& rLink);
-    void SetDumpAsPropertyTreeHdl(const Link<boost::property_tree::ptree&, void>& rLink);
+    void SetDumpAsPropertyTreeHdl(const Link<tools::JsonWriter&, void>& rLink);
 };
 
 }
diff --git a/sc/source/core/tool/chgtrack.cxx b/sc/source/core/tool/chgtrack.cxx
index f734224ce3fa..ab1714d3683e 100644
--- a/sc/source/core/tool/chgtrack.cxx
+++ b/sc/source/core/tool/chgtrack.cxx
@@ -4682,7 +4682,7 @@ static void lcl_getTrackedChange(ScDocument* pDoc, int nIndex, const ScChangeAct
     if (pAction->GetType() == SC_CAT_CONTENT)
     {
         auto redlinesNode = rRedlines.startNode("");
-        rRedlines.put("index", nIndex);
+        rRedlines.put("index", static_cast<sal_Int64>(nIndex));
 
         rRedlines.put("author", pAction->GetUser());
 
diff --git a/sc/source/ui/view/tabview.cxx b/sc/source/ui/view/tabview.cxx
index 4cc287403df0..765ef9a1e1d0 100644
--- a/sc/source/ui/view/tabview.cxx
+++ b/sc/source/ui/view/tabview.cxx
@@ -2564,8 +2564,8 @@ void ScTabView::getRowColumnHeaders(const tools::Rectangle& rRectangle, tools::J
         {
             auto node = rJsonWriter.startStruct();
             rJsonWriter.put("text", nStartRow + 1);
-            rJsonWriter.put("size",nTotalPixels);
-            rJsonWriter.put("groupLevels", nRowGroupDepth);
+            rJsonWriter.put("size", nTotalPixels);
+            rJsonWriter.put("groupLevels", static_cast<sal_Int64>(nRowGroupDepth));
         }
 
         std::vector<long> aRowGroupStartPositions(nRowGroupDepth, -nTotalPixels);
@@ -2703,9 +2703,9 @@ void ScTabView::getRowColumnHeaders(const tools::Rectangle& rRectangle, tools::J
         if (nStartCol != nEndCol)
         {
             auto node = rJsonWriter.startStruct();
-            rJsonWriter.put("text", nStartCol + 1);
+            rJsonWriter.put("text", static_cast<sal_Int64>(nStartCol + 1));
             rJsonWriter.put("size", nTotalPixels);
-            rJsonWriter.put("groupLevels", nColGroupDepth);
+            rJsonWriter.put("groupLevels", static_cast<sal_Int64>(nColGroupDepth));
         }
 
         std::vector<long> aColGroupStartPositions(nColGroupDepth, -nTotalPixels);
diff --git a/sd/source/ui/sidebar/SlideBackground.cxx b/sd/source/ui/sidebar/SlideBackground.cxx
index df3a3beaeede..cf9191b2c679 100644
--- a/sd/source/ui/sidebar/SlideBackground.cxx
+++ b/sd/source/ui/sidebar/SlideBackground.cxx
@@ -273,14 +273,14 @@ void SlideBackground::Initialize()
     UpdateMarginBox();
 }
 
-boost::property_tree::ptree SlideBackground::DumpAsPropertyTree()
+void SlideBackground::DumpAsPropertyTree(::tools::JsonWriter& rJsonWriter)
 {
     if (mxPaperSizeBox->get_active() == -1)
     {
         mpBindings->Update(SID_ATTR_PAGE_SIZE);
     }
 
-    return Control::DumpAsPropertyTree();
+    Control::DumpAsPropertyTree(rJsonWriter);
 }
 
 void SlideBackground::HandleContextChange(
diff --git a/sd/source/ui/sidebar/SlideBackground.hxx b/sd/source/ui/sidebar/SlideBackground.hxx
index c4b91513700d..adc9e3bdc91b 100644
--- a/sd/source/ui/sidebar/SlideBackground.hxx
+++ b/sd/source/ui/sidebar/SlideBackground.hxx
@@ -73,7 +73,7 @@ public:
 
     virtual void HandleContextChange(
         const vcl::EnumContext& rContext) override;
-    virtual boost::property_tree::ptree DumpAsPropertyTree() override;
+    virtual void DumpAsPropertyTree(::tools::JsonWriter&) override;
 
 private:
 
diff --git a/sfx2/source/sidebar/Deck.cxx b/sfx2/source/sidebar/Deck.cxx
index d96305c3e2df..3088eb245497 100644
--- a/sfx2/source/sidebar/Deck.cxx
+++ b/sfx2/source/sidebar/Deck.cxx
@@ -35,7 +35,7 @@
 #include <vcl/IDialogRenderable.hxx>
 #include <toolkit/helper/vclunohelper.hxx>
 #include <tools/svborder.hxx>
-#include <boost/property_tree/ptree.hpp>
+#include <tools/json_writer.hxx>
 #include <sal/log.hxx>
 
 using namespace css;
@@ -194,15 +194,14 @@ void Deck::Resize()
  * Get the ordering as is shown in the layout, and our type as 'deck'
  * also elide nested panel windows.
  */
-boost::property_tree::ptree Deck::DumpAsPropertyTree()
+void Deck::DumpAsPropertyTree(tools::JsonWriter& rJsonWriter)
 {
-    boost::property_tree::ptree aTree;
-    aTree.put("id", get_id());  // TODO could be missing - sort out
-    aTree.put("type", "deck");
-    aTree.put("text", GetText());
-    aTree.put("enabled", IsEnabled());
+    rJsonWriter.put("id", get_id());  // TODO could be missing - sort out
+    rJsonWriter.put("type", "deck");
+    rJsonWriter.put("text", GetText());
+    rJsonWriter.put("enabled", IsEnabled());
 
-    boost::property_tree::ptree aPanelNodes;
+    auto childrenNode = rJsonWriter.startNode("children");
     for (auto &it : maPanels)
     {
         if (it->IsLurking())
@@ -216,21 +215,15 @@ boost::property_tree::ptree Deck::DumpAsPropertyTree()
         if (!pWindow)
             continue;
 
-        boost::property_tree::ptree aPanel;
-        aPanel.put("id", it->GetId());
-        aPanel.put("type", "panel");
-        aPanel.put("text", it->GetText());
-        aPanel.put("enabled", it->IsEnabled());
+        auto childNode = rJsonWriter.startNode("");
+        rJsonWriter.put("id", it->GetId());
+        rJsonWriter.put("type", "panel");
+        rJsonWriter.put("text", it->GetText());
+        rJsonWriter.put("enabled", it->IsEnabled());
 
-        boost::property_tree::ptree aChildren;
-        aChildren.push_back(std::make_pair("", pWindow->DumpAsPropertyTree()));
-        aPanel.add_child("children", aChildren);
-
-        aPanelNodes.push_back(std::make_pair("", aPanel));
+        auto children2Node = rJsonWriter.startNode("children");
+        pWindow->DumpAsPropertyTree(rJsonWriter);
     }
-    aTree.add_child("children", aPanelNodes);
-
-    return aTree;
 }
 
 bool Deck::ProcessWheelEvent(CommandEvent const * pCommandEvent)
diff --git a/sfx2/source/sidebar/Panel.cxx b/sfx2/source/sidebar/Panel.cxx
index 85b6ebf14d3e..6c7824b43cfd 100644
--- a/sfx2/source/sidebar/Panel.cxx
+++ b/sfx2/source/sidebar/Panel.cxx
@@ -25,6 +25,7 @@
 #include <sfx2/sidebar/ResourceManager.hxx>
 
 #include <sfx2/sidebar/SidebarController.hxx>
+#include <tools/json_writer.hxx>
 
 
 #ifdef DEBUG
@@ -37,8 +38,6 @@
 #include <com/sun/star/ui/XSidebarPanel.hpp>
 #include <com/sun/star/ui/XUIElement.hpp>
 
-#include <boost/property_tree/ptree.hpp>
-
 using namespace css;
 using namespace css::uno;
 
@@ -83,16 +82,13 @@ void Panel::ApplySettings(vcl::RenderContext& rRenderContext)
     rRenderContext.SetBackground(Theme::GetPaint(Theme::Paint_PanelBackground).GetWallpaper());
 }
 
-boost::property_tree::ptree Panel::DumpAsPropertyTree()
+void Panel::DumpAsPropertyTree(tools::JsonWriter& rJsonWriter)
 {
     if (!IsLurking())
     {
-        boost::property_tree::ptree aTree(vcl::Window::DumpAsPropertyTree());
-        aTree.put("type", "panel");
-        return aTree;
+        vcl::Window::DumpAsPropertyTree(rJsonWriter);
+        rJsonWriter.put("type", "panel");
     }
-    else
-        return boost::property_tree::ptree();
 }
 
 void Panel::dispose()
diff --git a/sfx2/source/sidebar/SidebarDockingWindow.cxx b/sfx2/source/sidebar/SidebarDockingWindow.cxx
index 7039983f9cfd..8cc420001210 100644
--- a/sfx2/source/sidebar/SidebarDockingWindow.cxx
+++ b/sfx2/source/sidebar/SidebarDockingWindow.cxx
@@ -29,6 +29,7 @@
 #include <sfx2/viewfrm.hxx>
 #include <svtools/acceleratorexecute.hxx>
 #include <tools/gen.hxx>
+#include <tools/json_writer.hxx>
 #include <vcl/event.hxx>
 #include <comphelper/lok.hxx>
 #include <LibreOfficeKit/LibreOfficeKitEnums.h>
@@ -68,15 +69,15 @@ public:
             if (pMobileNotifier && pMobileNotifier->isLOKMobilePhone())
             {
                 // Mobile phone.
-                std::stringstream aStream;
-                boost::property_tree::ptree aTree = m_rSidebarDockingWin.DumpAsPropertyTree();
-                aTree.put("id", m_rSidebarDockingWin.GetLOKWindowId());
-                boost::property_tree::write_json(aStream, aTree);
-                const std::string message = aStream.str();
+                tools::JsonWriter aJsonWriter;
+                m_rSidebarDockingWin.DumpAsPropertyTree(aJsonWriter);
+                aJsonWriter.put("id", m_rSidebarDockingWin.GetLOKWindowId());
+                std::unique_ptr<char[]> data( aJsonWriter.extractData());
+                std::string_view message(data.get());
                 if (message != m_LastNotificationMessage)
                 {
                     m_LastNotificationMessage = message;
-                    pMobileNotifier->libreOfficeKitViewCallback(LOK_CALLBACK_JSDIALOG, message.c_str());
+                    pMobileNotifier->libreOfficeKitViewCallback(LOK_CALLBACK_JSDIALOG, m_LastNotificationMessage.c_str());
                 }
             }
 
diff --git a/svx/source/sidebar/possize/PosSizePropertyPanel.cxx b/svx/source/sidebar/possize/PosSizePropertyPanel.cxx
index 248675f7ee1f..322e6700ad80 100644
--- a/svx/source/sidebar/possize/PosSizePropertyPanel.cxx
+++ b/svx/source/sidebar/possize/PosSizePropertyPanel.cxx
@@ -853,14 +853,14 @@ void PosSizePropertyPanel::executeSize()
     }
 }
 
-boost::property_tree::ptree PosSizePropertyPanel::DumpAsPropertyTree()
+void PosSizePropertyPanel::DumpAsPropertyTree(tools::JsonWriter& rJsonWriter)
 {
     if (meDlgUnit != GetCurrentUnit(SfxItemState::DEFAULT, nullptr))
     {
         mpBindings->Update( SID_ATTR_METRIC );
     }
 
-    return PanelLayout::DumpAsPropertyTree();
+    PanelLayout::DumpAsPropertyTree(rJsonWriter);
 }
 
 void PosSizePropertyPanel::MetricState( SfxItemState eState, const SfxPoolItem* pState )
diff --git a/svx/source/sidebar/possize/PosSizePropertyPanel.hxx b/svx/source/sidebar/possize/PosSizePropertyPanel.hxx
index 8abd1e0c86bb..a35c8a425878 100644
--- a/svx/source/sidebar/possize/PosSizePropertyPanel.hxx
+++ b/svx/source/sidebar/possize/PosSizePropertyPanel.hxx
@@ -66,7 +66,7 @@ public:
         const SfxItemState eState,
         const SfxPoolItem* pState) override;
 
-    virtual boost::property_tree::ptree DumpAsPropertyTree() override;
+    virtual void DumpAsPropertyTree(tools::JsonWriter&) override;
 
     SfxBindings* GetBindings() { return mpBindings;}
 
diff --git a/svx/source/tbxctrls/fillctrl.cxx b/svx/source/tbxctrls/fillctrl.cxx
index 3d91e5cb823c..fcdd67efbe38 100644
--- a/svx/source/tbxctrls/fillctrl.cxx
+++ b/svx/source/tbxctrls/fillctrl.cxx
@@ -26,6 +26,7 @@
 #include <vcl/settings.hxx>
 #include <vcl/toolbox.hxx>
 #include <svx/svxids.hrc>
+#include <tools/json_writer.hxx>
 
 #define TMP_STR_BEGIN   "["
 #define TMP_STR_END     "]"
@@ -579,9 +580,9 @@ FillControl::FillControl(vcl::Window* pParent, const css::uno::Reference<css::fr
     SetOptimalSize();
 }
 
-IMPL_STATIC_LINK(FillControl, DumpAsPropertyTreeHdl, boost::property_tree::ptree&, rTree, void)
+IMPL_STATIC_LINK(FillControl, DumpAsPropertyTreeHdl, tools::JsonWriter&, rJsonWriter, void)
 {
-    rTree.put("command", ".uno:FillStyle");
+    rJsonWriter.put("command", ".uno:FillStyle");
 }
 
 void FillControl::ReleaseFocus_Impl()
diff --git a/svx/source/tbxctrls/tbcontrl.cxx b/svx/source/tbxctrls/tbcontrl.cxx
index 732ad7d9f835..d8e0e6d90991 100644
--- a/svx/source/tbxctrls/tbcontrl.cxx
+++ b/svx/source/tbxctrls/tbcontrl.cxx
@@ -98,9 +98,9 @@
 #include <bitmaps.hlst>
 #include <sal/log.hxx>
 #include <unotools/collatorwrapper.hxx>
-#include <boost/property_tree/ptree.hpp>
 
 #include <comphelper/lok.hxx>
+#include <tools/json_writer.hxx>
 
 #define MAX_MRU_FONTNAME_ENTRIES    5
 
@@ -194,7 +194,7 @@ private:
     DECL_LINK(KeyInputHdl, const KeyEvent&, bool);
     DECL_LINK(ActivateHdl, weld::ComboBox&, bool);
     DECL_LINK(FocusOutHdl, weld::Widget&, void);
-    DECL_LINK(DumpAsPropertyTreeHdl, boost::property_tree::ptree&, void);
+    DECL_LINK(DumpAsPropertyTreeHdl, tools::JsonWriter&, void);
     DECL_LINK(CustomRenderHdl, weld::ComboBox::render_args, void);
     DECL_LINK(CustomGetSizeHdl, OutputDevice&, Size);
 
@@ -366,7 +366,7 @@ public:
     DECL_LINK(ActivateHdl, weld::ComboBox&, bool);
     DECL_LINK(FocusInHdl, weld::Widget&, void);
     DECL_LINK(FocusOutHdl, weld::Widget&, void);
-    DECL_LINK(DumpAsPropertyTreeHdl, boost::property_tree::ptree&, void);
+    DECL_LINK(DumpAsPropertyTreeHdl, tools::JsonWriter&, void);
 };
 
 class SvxFontNameBox_Impl final : public InterimItemWindow
@@ -1342,33 +1342,30 @@ Color SvxStyleBox_Base::TestColorsVisible(const Color &FontCol, const Color &Bac
     return retCol;
 }
 
-IMPL_LINK(SvxStyleBox_Base, DumpAsPropertyTreeHdl, boost::property_tree::ptree&, rTree, void)
+IMPL_LINK(SvxStyleBox_Base, DumpAsPropertyTreeHdl, tools::JsonWriter&, rJsonWriter, void)
 {
-    boost::property_tree::ptree aEntries;
-
-    for (int i = 0, nEntryCount = m_xWidget->get_count(); i < nEntryCount; ++i)
     {
-        boost::property_tree::ptree aEntry;
-        aEntry.put("", m_xWidget->get_text(i));
-        aEntries.push_back(std::make_pair("", aEntry));
+        auto entriesNode = rJsonWriter.startNode("entries");
+        for (int i = 0, nEntryCount = m_xWidget->get_count(); i < nEntryCount; ++i)
+        {
+            auto entryNode = rJsonWriter.startNode("");
+            rJsonWriter.put("", m_xWidget->get_text(i));
+        }
     }
 
-    rTree.add_child("entries", aEntries);
-
-    boost::property_tree::ptree aSelected;
-
     int nActive = m_xWidget->get_active();
+    rJsonWriter.put("selectedCount", static_cast<sal_Int32>(nActive == -1 ? 0 : 1));
 
-    if (nActive != -1)
     {
-        boost::property_tree::ptree aEntry;
-        aEntry.put("", nActive);
-        aSelected.push_back(std::make_pair("", aEntry));
+        auto selectedNode = rJsonWriter.startNode("selectedEntries");
+        if (nActive != -1)
+        {
+            auto node = rJsonWriter.startNode("");
+            rJsonWriter.put("", static_cast<sal_Int32>(nActive));
+        }
     }
 
-    rTree.put("selectedCount", nActive == -1 ? 0 : 1);
-    rTree.add_child("selectedEntries", aSelected);
-    rTree.put("command", ".uno:StyleApply");
+    rJsonWriter.put("command", ".uno:StyleApply");
 }
 
 static bool lcl_GetDocFontList(const FontList** ppFontList, SvxFontNameBox_Base* pBox)
@@ -1711,32 +1708,30 @@ void SvxFontNameBox_Base::Select(bool bNonTravelSelect)
     }
 }
 
-IMPL_LINK(SvxFontNameBox_Base, DumpAsPropertyTreeHdl, boost::property_tree::ptree&, rTree, void)
+IMPL_LINK(SvxFontNameBox_Base, DumpAsPropertyTreeHdl, tools::JsonWriter&, rJsonWriter, void)
 {
-    boost::property_tree::ptree aEntries;
-
-    for (int i = 0, nEntryCount = m_xWidget->get_count(); i < nEntryCount; ++i)
     {
-        boost::property_tree::ptree aEntry;
-        aEntry.put("", m_xWidget->get_text(i));
-        aEntries.push_back(std::make_pair("", aEntry));
+        auto entriesNode = rJsonWriter.startNode("entries");
+        for (int i = 0, nEntryCount = m_xWidget->get_count(); i < nEntryCount; ++i)
+        {
+            auto entryNode = rJsonWriter.startNode("");
+            rJsonWriter.put("", m_xWidget->get_text(i));
+        }
     }
 
-    rTree.add_child("entries", aEntries);
-
-    boost::property_tree::ptree aSelected;
-
     int nSelectedEntry = m_xWidget->get_active();
-    if (nSelectedEntry != -1)
+    rJsonWriter.put("selectedCount", static_cast<sal_Int32>(nSelectedEntry == -1 ? 0 : 1));
+
     {
-        boost::property_tree::ptree aEntry;
-        aEntry.put("", m_xWidget->get_text(nSelectedEntry));
-        aSelected.push_back(std::make_pair("", aEntry));
+        auto selectedNode = rJsonWriter.startNode("selectedEntries");
+        if (nSelectedEntry != -1)
+        {
+            auto entryNode = rJsonWriter.startNode("");
+            rJsonWriter.put("", m_xWidget->get_text(nSelectedEntry));
+        }
     }
 
-    rTree.put("selectedCount", nSelectedEntry == -1 ? 0 : 1);
-    rTree.add_child("selectedEntries", aSelected);
-    rTree.put("command", ".uno:CharFontName");
+    rJsonWriter.put("command", ".uno:CharFontName");
 }
 
 ColorWindow::ColorWindow(const OUString& rCommand,
diff --git a/svx/source/tbxctrls/tbunocontroller.cxx b/svx/source/tbxctrls/tbunocontroller.cxx
index 8e42177bfd79..f1d1db4522ee 100644
--- a/svx/source/tbxctrls/tbunocontroller.cxx
+++ b/svx/source/tbxctrls/tbunocontroller.cxx
@@ -34,6 +34,7 @@
 #include <svtools/ctrltool.hxx>
 #include <svtools/ctrlbox.hxx>
 #include <svtools/toolboxcontroller.hxx>
+#include <tools/json_writer.hxx>
 #include <cppuhelper/queryinterface.hxx>
 #include <cppuhelper/supportsservice.hxx>
 
@@ -41,7 +42,6 @@
 
 #include <vcl/InterimItemWindow.hxx>
 #include <sfx2/sidebar/SidebarToolBox.hxx>
-#include <boost/property_tree/ptree.hpp>
 
 using namespace ::com::sun::star;
 
@@ -125,7 +125,7 @@ protected:
     DECL_LINK(KeyInputHdl, const KeyEvent&, bool);
     DECL_LINK(ActivateHdl, weld::ComboBox&, bool);
     DECL_LINK(FocusOutHdl, weld::Widget&, void);
-    DECL_LINK(DumpAsPropertyTreeHdl, boost::property_tree::ptree&, void);
+    DECL_LINK(DumpAsPropertyTreeHdl, tools::JsonWriter&, void);
 };
 
 class SvxFontSizeBox_Impl final : public InterimItemWindow
@@ -337,33 +337,29 @@ void SvxFontSizeBox_Impl::DataChanged( const DataChangedEvent& rDCEvt )
     }
 }
 
-IMPL_LINK(SvxFontSizeBox_Base, DumpAsPropertyTreeHdl, boost::property_tree::ptree&, rTree, void)
+IMPL_LINK(SvxFontSizeBox_Base, DumpAsPropertyTreeHdl, tools::JsonWriter&, rJsonWriter, void)
 {
-    boost::property_tree::ptree aEntries;
-
-    for (int i = 0, nCount = m_xWidget->get_count(); i < nCount; ++i)
     {
-        boost::property_tree::ptree aEntry;
-        aEntry.put("", m_xWidget->get_text(i));
-        aEntries.push_back(std::make_pair("", aEntry));
+        auto entriesNode = rJsonWriter.startNode("entries");
+        for (int i = 0, nCount = m_xWidget->get_count(); i < nCount; ++i)
+        {
+            auto entryNode = rJsonWriter.startNode("");
+            rJsonWriter.put("", m_xWidget->get_text(i));
+        }
     }
 
-    rTree.add_child("entries", aEntries);
-
-    boost::property_tree::ptree aSelected;
-
     int nActive = m_xWidget->get_active();
-    if (nActive != -1)
+    rJsonWriter.put("selectedCount", static_cast<sal_Int32>(nActive == -1 ? 0 : 1));
     {
-        boost::property_tree::ptree aEntry;
-        aEntry.put("", nActive);
-        aSelected.push_back(std::make_pair("", aEntry));
+        auto selectedNode = rJsonWriter.startNode("selectedEntries");
+        if (nActive != -1)
+        {
+            auto node = rJsonWriter.startNode("");
+            rJsonWriter.put("", static_cast<sal_Int32>(nActive));
+        }
     }
 
-    rTree.put("selectedCount", nActive == -1 ? 0 : 1);
-    rTree.add_child("selectedEntries", aSelected);
-
-    rTree.put("command", ".uno:FontHeight");
+    rJsonWriter.put("command", ".uno:FontHeight");
 }
 
 FontHeightToolBoxControl::FontHeightToolBoxControl( const uno::Reference< uno::XComponentContext >& rxContext )
diff --git a/sw/source/uibase/app/swmodul1.cxx b/sw/source/uibase/app/swmodul1.cxx
index cbaf3bdc2d90..abe620c3bf07 100644
--- a/sw/source/uibase/app/swmodul1.cxx
+++ b/sw/source/uibase/app/swmodul1.cxx
@@ -440,7 +440,7 @@ void SwModule::GetRedlineAuthorInfo(tools::JsonWriter& rJsonWriter)
     for (std::size_t nAuthor = 0; nAuthor < m_pAuthorNames.size(); ++nAuthor)
     {
         auto authorNode = rJsonWriter.startNode("");
-        rJsonWriter.put("index", nAuthor);
+        rJsonWriter.put("index", static_cast<sal_Int64>(nAuthor));
         rJsonWriter.put("name", m_pAuthorNames[nAuthor]);
         rJsonWriter.put("color", sal_uInt32(lcl_GetAuthorColor(nAuthor)));
     }
diff --git a/tools/qa/cppunit/test_json_writer.cxx b/tools/qa/cppunit/test_json_writer.cxx
index 6d473e605497..d5c037801067 100644
--- a/tools/qa/cppunit/test_json_writer.cxx
+++ b/tools/qa/cppunit/test_json_writer.cxx
@@ -48,7 +48,7 @@ void JsonWriterTest::test1()
         aJson.put("oustring", OUString("val1"));
         aJson.put("ostring", OString("val2"));
         aJson.put("charptr", "val3");
-        aJson.put("int", 12);
+        aJson.put("int", static_cast<sal_Int32>(12));
     }
 
     std::unique_ptr<char, o3tl::free_delete> result(aJson.extractData());
diff --git a/tools/source/misc/json_writer.cxx b/tools/source/misc/json_writer.cxx
index be891ef18423..aacf3f709c90 100644
--- a/tools/source/misc/json_writer.cxx
+++ b/tools/source/misc/json_writer.cxx
@@ -11,6 +11,7 @@
 #include <stdio.h>
 #include <cstring>
 #include <rtl/strbuf.hxx>
+#include <rtl/math.hxx>
 
 namespace tools
 {
@@ -270,7 +271,7 @@ void JsonWriter::put(const char* pPropName, const char* pPropVal)
     ++mPos;
 }
 
-void JsonWriter::put(const char* pPropName, int nPropVal)
+void JsonWriter::put(const char* pPropName, sal_Int64 nPropVal)
 {
     auto nPropNameLength = strlen(pPropName);
     auto nWorstCasePropValLength = 32;
@@ -285,7 +286,49 @@ void JsonWriter::put(const char* pPropName, int nPropVal)
     memcpy(mPos, "\": ", 3);
     mPos += 3;
 
-    mPos += sprintf(mPos, "%d", nPropVal);
+    mPos += sprintf(mPos, "%ld", nPropVal);
+}
+
+void JsonWriter::put(const char* pPropName, double fPropVal)
+{
+    OString sPropVal = rtl::math::doubleToString(fPropVal, rtl_math_StringFormat_F, 12, '.');
+    auto nPropNameLength = strlen(pPropName);
+    ensureSpace(nPropNameLength + sPropVal.getLength() + 8);
+
+    addCommaBeforeField();
+
+    *mPos = '"';
+    ++mPos;
+    memcpy(mPos, pPropName, nPropNameLength);
+    mPos += nPropNameLength;
+    memcpy(mPos, "\": ", 3);
+    mPos += 3;
+
+    memcpy(mPos, sPropVal.getStr(), sPropVal.getLength());
+    mPos += sPropVal.getLength();
+}
+
+void JsonWriter::put(const char* pPropName, bool nPropVal)
+{
+    auto nPropNameLength = strlen(pPropName);
+    ensureSpace(nPropNameLength + 5 + 8);
+
+    addCommaBeforeField();
+
+    *mPos = '"';
+    ++mPos;
+    memcpy(mPos, pPropName, nPropNameLength);
+    mPos += nPropNameLength;
+    memcpy(mPos, "\": ", 3);
+    mPos += 3;
+
+    const char* pVal;
+    if (nPropVal)
+        pVal = "true";
+    else
+        pVal = "false";
+    memcpy(mPos, pVal, strlen(pVal));
+    mPos += strlen(pVal);
 }
 
 void JsonWriter::putRaw(const rtl::OStringBuffer& rRawBuf)
@@ -349,5 +392,19 @@ OString JsonWriter::extractAsOString()
     return ret;
 }
 
+std::string JsonWriter::extractAsStdString()
+{
+    char* pChar = extractData();
+    std::string ret(pChar);
+    free(pChar);
+    return ret;
+}
+
+bool JsonWriter::isDataEquals(const std::string& s)
+{
+    return s.length() == static_cast<size_t>(mPos - mpBuffer)
+           && memcmp(s.data(), mpBuffer, s.length()) == 0;
+}
+
 } // namespace tools
 /* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */
diff --git a/vcl/inc/salvtables.hxx b/vcl/inc/salvtables.hxx
index f1fbb4136076..3e748bf5a657 100644
--- a/vcl/inc/salvtables.hxx
+++ b/vcl/inc/salvtables.hxx
@@ -377,8 +377,7 @@ public:
 
     virtual css::uno::Reference<css::datatransfer::dnd::XDropTarget> get_drop_target() override;
 
-    virtual void
-    connect_get_property_tree(const Link<boost::property_tree::ptree&, void>& rLink) override;
+    virtual void connect_get_property_tree(const Link<tools::JsonWriter&, void>& rLink) override;
 
     virtual void set_stack_background() override;
 
diff --git a/vcl/inc/window.h b/vcl/inc/window.h
index 6b362e7d3bd9..8533f8bea80d 100644
--- a/vcl/inc/window.h
+++ b/vcl/inc/window.h
@@ -249,7 +249,7 @@ public:
     std::set<Link<VclWindowEvent&,void>> maChildEventListenersDeleted;
     Link<vcl::Window&, bool> maHelpRequestHdl;
     Link<vcl::Window&, bool> maMnemonicActivateHdl;
-    Link<boost::property_tree::ptree&, void> maDumpAsPropertyTreeHdl;
+    Link<tools::JsonWriter&, void> maDumpAsPropertyTreeHdl;
 
     // The canvas interface for this VCL window. Is persistent after the first GetCanvas() call
     css::uno::WeakReference< css::rendering::XCanvas >    mxCanvas;
diff --git a/vcl/jsdialog/jsdialogbuilder.cxx b/vcl/jsdialog/jsdialogbuilder.cxx
index fa7f25d33c00..e27bc81cb39f 100644
--- a/vcl/jsdialog/jsdialogbuilder.cxx
+++ b/vcl/jsdialog/jsdialogbuilder.cxx
@@ -9,13 +9,15 @@
 
 #include <jsdialog/jsdialogbuilder.hxx>
 #include <sal/log.hxx>
-#include <boost/property_tree/json_parser.hpp>
 #include <comphelper/lok.hxx>
 #include <vcl/tabpage.hxx>
 #include <vcl/toolkit/dialog.hxx>
 #include <LibreOfficeKit/LibreOfficeKitEnums.h>
 #include <vcl/toolkit/combobox.hxx>
 #include <messagedialog.hxx>
+#include <tools/json_writer.hxx>
+#include <o3tl/deleter.hxx>
+#include <memory>
 
 JSDialogNotifyIdle::JSDialogNotifyIdle(VclPtr<vcl::Window> aWindow)
     : Idle("JSDialog notify")
@@ -35,15 +37,14 @@ void JSDialogNotifyIdle::Invoke()
         const vcl::ILibreOfficeKitNotifier* pNotifier = m_aWindow->GetLOKNotifier();
         if (pNotifier)
         {
-            std::stringstream aStream;
-            boost::property_tree::ptree aTree = m_aWindow->DumpAsPropertyTree();
-            aTree.put("id", m_aWindow->GetLOKWindowId());
-            boost::property_tree::write_json(aStream, aTree);
-            const std::string message = aStream.str();
-            if (message != m_LastNotificationMessage)
+            tools::JsonWriter aJsonWriter;
+            m_aWindow->DumpAsPropertyTree(aJsonWriter);
+            aJsonWriter.put("id", m_aWindow->GetLOKWindowId());
+            if (!aJsonWriter.isDataEquals(m_LastNotificationMessage))
             {
-                m_LastNotificationMessage = message;
-                pNotifier->libreOfficeKitViewCallback(LOK_CALLBACK_JSDIALOG, message.c_str());
+                m_LastNotificationMessage = aJsonWriter.extractAsStdString();
+                pNotifier->libreOfficeKitViewCallback(LOK_CALLBACK_JSDIALOG,
+                                                      m_LastNotificationMessage.c_str());
             }
         }
     }
@@ -143,12 +144,10 @@ std::unique_ptr<weld::Dialog> JSInstanceBuilder::weld_dialog(const OString& id,
     const vcl::ILibreOfficeKitNotifier* pNotifier = pDialog->GetLOKNotifier();
     if (pNotifier)
     {
-        std::stringstream aStream;
-        boost::property_tree::ptree aTree = m_aOwnedToplevel->DumpAsPropertyTree();
-        aTree.put("id", m_aOwnedToplevel->GetLOKWindowId());
-        boost::property_tree::write_json(aStream, aTree);
-        const std::string message = aStream.str();
-        pNotifier->libreOfficeKitViewCallback(LOK_CALLBACK_JSDIALOG, message.c_str());
+        tools::JsonWriter aJsonWriter;
+        m_aOwnedToplevel->DumpAsPropertyTree(aJsonWriter);
+        aJsonWriter.put("id", m_aOwnedToplevel->GetLOKWindowId());
+        pNotifier->libreOfficeKitViewCallback(LOK_CALLBACK_JSDIALOG, aJsonWriter.extractData());
     }
 
     return pRet;
@@ -280,12 +279,11 @@ weld::MessageDialog* JSInstanceBuilder::CreateMessageDialog(weld::Widget* pParen
     const vcl::ILibreOfficeKitNotifier* pNotifier = xMessageDialog->GetLOKNotifier();
     if (pNotifier)
     {
-        std::stringstream aStream;
-        boost::property_tree::ptree aTree = xMessageDialog->DumpAsPropertyTree();
-        aTree.put("id", xMessageDialog->GetLOKWindowId());
-        boost::property_tree::write_json(aStream, aTree);
-        const std::string message = aStream.str();
-        pNotifier->libreOfficeKitViewCallback(LOK_CALLBACK_JSDIALOG, message.c_str());
+        tools::JsonWriter aJsonWriter;
+        xMessageDialog->DumpAsPropertyTree(aJsonWriter);
+        aJsonWriter.put("id", xMessageDialog->GetLOKWindowId());
+        std::unique_ptr<char[], o3tl::free_delete> message(aJsonWriter.extractData());
+        pNotifier->libreOfficeKitViewCallback(LOK_CALLBACK_JSDIALOG, message.get());
     }
 
     return new JSMessageDialog(xMessageDialog, nullptr, true);
diff --git a/vcl/source/app/salvtables.cxx b/vcl/source/app/salvtables.cxx
index 9a9484397274..f395d5240182 100644
--- a/vcl/source/app/salvtables.cxx
+++ b/vcl/source/app/salvtables.cxx
@@ -501,7 +501,7 @@ css::uno::Reference<css::datatransfer::dnd::XDropTarget> SalInstanceWidget::get_
 }
 
 void SalInstanceWidget::connect_get_property_tree(
-    const Link<boost::property_tree::ptree&, void>& rLink)
+    const Link<tools::JsonWriter&, void>& rLink)
 {
     m_xWidget->SetDumpAsPropertyTreeHdl(rLink);
 }
diff --git a/vcl/source/control/button.cxx b/vcl/source/control/button.cxx
index afc27c18dd5c..05e8aa46eca7 100644
--- a/vcl/source/control/button.cxx
+++ b/vcl/source/control/button.cxx
@@ -45,6 +45,7 @@
 #include <comphelper/lok.hxx>
 #include <officecfg/Office/Common.hxx>
 #include <boost/property_tree/ptree.hpp>
+#include <tools/json_writer.hxx>
 
 
 using namespace css;
@@ -552,11 +553,10 @@ FactoryFunction Button::GetUITestFactory() const
     return ButtonUIObject::create;
 }
 
-boost::property_tree::ptree Button::DumpAsPropertyTree()
+void Button::DumpAsPropertyTree(tools::JsonWriter& rJsonWriter)
 {
-    boost::property_tree::ptree aTree(Control::DumpAsPropertyTree());
-    aTree.put("text", GetText());
-    return aTree;
+    Control::DumpAsPropertyTree(rJsonWriter);
+    rJsonWriter.put("text", GetText());
 }
 
 IMPL_STATIC_LINK( Button, dispatchCommandHandler, Button*, pButton, void )
@@ -2844,11 +2844,10 @@ void RadioButton::ShowFocus(const tools::Rectangle& rRect)
     Button::ShowFocus(rRect);
 }
 
-boost::property_tree::ptree RadioButton::DumpAsPropertyTree()
+void RadioButton::DumpAsPropertyTree(tools::JsonWriter& rJsonWriter)
 {
-    boost::property_tree::ptree aTree(Button::DumpAsPropertyTree());
-    aTree.put("checked", IsChecked());
-    return aTree;
+    Button::DumpAsPropertyTree(rJsonWriter);
+    rJsonWriter.put("checked", IsChecked());
 }
 
 FactoryFunction RadioButton::GetUITestFactory() const
@@ -3661,11 +3660,10 @@ void CheckBox::ShowFocus(const tools::Rectangle& rRect)
     Button::ShowFocus(rRect);
 }
 
-boost::property_tree::ptree CheckBox::DumpAsPropertyTree()
+void CheckBox::DumpAsPropertyTree(tools::JsonWriter& rJsonWriter)
 {
-    boost::property_tree::ptree aTree(Button::DumpAsPropertyTree());
-    aTree.put("checked", IsChecked());
-    return aTree;
+    Button::DumpAsPropertyTree(rJsonWriter);
+    rJsonWriter.put("checked", IsChecked());
 }
 
 FactoryFunction CheckBox::GetUITestFactory() const
diff --git a/vcl/source/control/field.cxx b/vcl/source/control/field.cxx
index d81c3b3e2beb..e7a6472713fa 100644
--- a/vcl/source/control/field.cxx
+++ b/vcl/source/control/field.cxx
@@ -43,6 +43,7 @@
 
 #include <unotools/localedatawrapper.hxx>
 #include <boost/property_tree/ptree.hpp>
+#include <tools/json_writer.hxx>
 
 using namespace ::com::sun::star;
 using namespace ::comphelper;
@@ -871,12 +872,11 @@ void NumericField::Last()
     SpinField::Last();
 }
 
-boost::property_tree::ptree NumericField::DumpAsPropertyTree()
+void NumericField::DumpAsPropertyTree(tools::JsonWriter& rJsonWriter)
 {
-    boost::property_tree::ptree aTree(SpinField::DumpAsPropertyTree());
-    aTree.put("min", GetMin());
-    aTree.put("max", GetMax());
-    return aTree;
+    SpinField::DumpAsPropertyTree(rJsonWriter);
+    rJsonWriter.put("min", GetMin());
+    rJsonWriter.put("max", GetMax());
 }
 
 namespace
@@ -1712,17 +1712,15 @@ void MetricField::Last()
     SpinField::Last();
 }
 
-boost::property_tree::ptree MetricField::DumpAsPropertyTree()
+void MetricField::DumpAsPropertyTree(tools::JsonWriter& rJsonWriter)
 {
-    boost::property_tree::ptree aTree(SpinField::DumpAsPropertyTree());
-    aTree.put("min", GetMin());
-    aTree.put("max", GetMax());
-    aTree.put("unit", FieldUnitToString(GetUnit()));
+    SpinField::DumpAsPropertyTree(rJsonWriter);
+    rJsonWriter.put("min", GetMin());
+    rJsonWriter.put("max", GetMax());
+    rJsonWriter.put("unit", FieldUnitToString(GetUnit()));
     OUString sValue = Application::GetSettings().GetNeutralLocaleDataWrapper().
         getNum(GetValue(), GetDecimalDigits(), false, false);
-    aTree.put("value", sValue.toUtf8().getStr());
-
-    return aTree;
+    rJsonWriter.put("value", sValue);
 }
 
 FactoryFunction MetricField::GetUITestFactory() const
diff --git a/vcl/source/control/fmtfield.cxx b/vcl/source/control/fmtfield.cxx
index 87ff8b7b68c9..c00a721250dc 100644
--- a/vcl/source/control/fmtfield.cxx
+++ b/vcl/source/control/fmtfield.cxx
@@ -38,6 +38,7 @@
 #include <rtl/ustrbuf.hxx>
 #include <sal/log.hxx>
 #include <osl/diagnose.h>
+#include <tools/json_writer.hxx>
 
 using namespace ::com::sun::star::lang;
 using namespace ::com::sun::star::util;
@@ -1091,17 +1092,12 @@ void FormattedField::UseInputStringForFormatting()
     m_bUseInputStringForFormatting = true;
 }
 
-boost::property_tree::ptree FormattedField::DumpAsPropertyTree()
+void FormattedField::DumpAsPropertyTree(tools::JsonWriter& rJsonWriter)
 {
-    boost::property_tree::ptree aTree(SpinField::DumpAsPropertyTree());
-    aTree.put("min", rtl::math::doubleToString(GetMinValue(),
-        rtl_math_StringFormat_F, GetDecimalDigits(), '.').getStr());
-    aTree.put("max", rtl::math::doubleToString(GetMaxValue(),
-        rtl_math_StringFormat_F, GetDecimalDigits(), '.').getStr());
-    aTree.put("value", rtl::math::doubleToString(GetValue(),
-        rtl_math_StringFormat_F, GetDecimalDigits(), '.').getStr());
-
-    return aTree;
+    SpinField::DumpAsPropertyTree(rJsonWriter);
+    rJsonWriter.put("min", GetMinValue());
+    rJsonWriter.put("max", GetMaxValue());
+    rJsonWriter.put("value", GetValue());
 }
 
 FactoryFunction FormattedField::GetUITestFactory() const
diff --git a/vcl/source/control/listbox.cxx b/vcl/source/control/listbox.cxx
index 9b3cb51c1248..fc7806d732a7 100644
--- a/vcl/source/control/listbox.cxx
+++ b/vcl/source/control/listbox.cxx
@@ -33,6 +33,7 @@
 
 #include <com/sun/star/datatransfer/dnd/XDropTarget.hpp>
 #include <boost/property_tree/ptree.hpp>
+#include <tools/json_writer.hxx>
 
 ListBox::ListBox(WindowType nType)
     : Control(nType)
@@ -1394,33 +1395,29 @@ FactoryFunction ListBox::GetUITestFactory() const
     return ListBoxUIObject::create;
 }
 
-boost::property_tree::ptree ListBox::DumpAsPropertyTree()
+void ListBox::DumpAsPropertyTree(tools::JsonWriter& rJsonWriter)
 {
-    boost::property_tree::ptree aTree(Control::DumpAsPropertyTree());
-    boost::property_tree::ptree aEntries;
+    Control::DumpAsPropertyTree(rJsonWriter);
 
-    for (int i = 0; i < GetEntryCount(); ++i)
     {
-        boost::property_tree::ptree aEntry;
-        aEntry.put("", GetEntry(i));
-        aEntries.push_back(std::make_pair("", aEntry));
+        auto entriesNode = rJsonWriter.startNode("entries");
+        for (int i = 0; i < GetEntryCount(); ++i)
+        {
+            auto entryNode = rJsonWriter.startNode("");
+            rJsonWriter.put("", GetEntry(i));
+        }
     }
 
-    aTree.add_child("entries", aEntries);
+    rJsonWriter.put("selectedCount", GetSelectedEntryCount());
 
-    boost::property_tree::ptree aSelected;
-
-    for (int i = 0; i < GetSelectedEntryCount(); ++i)
     {
-        boost::property_tree::ptree aEntry;
-        aEntry.put("", GetSelectedEntryPos(i));
-        aSelected.push_back(std::make_pair("", aEntry));
+        auto entriesNode = rJsonWriter.startNode("selectedEntries");
+        for (int i = 0; i < GetSelectedEntryCount(); ++i)
+        {
+            auto entryNode = rJsonWriter.startNode("");
+            rJsonWriter.put("", GetSelectedEntryPos(i));
+        }
     }
-
-    aTree.put("selectedCount", GetSelectedEntryCount());
-    aTree.add_child("selectedEntries", aSelected);
-
-    return aTree;
 }
 
 MultiListBox::MultiListBox( vcl::Window* pParent, WinBits nStyle ) :
diff --git a/vcl/source/control/tabctrl.cxx b/vcl/source/control/tabctrl.cxx
index 0afb0008c9d3..728e4c379858 100644
--- a/vcl/source/control/tabctrl.cxx
+++ b/vcl/source/control/tabctrl.cxx
@@ -34,6 +34,7 @@
 #include <vcl/settings.hxx>
 #include <vcl/uitest/uiobject.hxx>
 #include <bitmaps.hlst>
+#include <tools/json_writer.hxx>
 
 #include <controldata.hxx>
 #include <svdata.hxx>
@@ -2160,24 +2161,20 @@ FactoryFunction TabControl::GetUITestFactory() const
     return TabControlUIObject::create;
 }
 
-boost::property_tree::ptree TabControl::DumpAsPropertyTree()
+void TabControl::DumpAsPropertyTree(tools::JsonWriter& rJsonWriter)
 {
-    boost::property_tree::ptree aTree = Control::DumpAsPropertyTree();
-
-    boost::property_tree::ptree aTabs;
-    for(auto id : GetPageIDs())
+    Control::DumpAsPropertyTree(rJsonWriter);
     {
-        boost::property_tree::ptree aTab;
-        aTab.put("text", GetPageText(id));
-        aTab.put("id", id);
-        aTab.put("name", GetPageName(id));
-        aTabs.push_back(std::make_pair("", aTab));
+        auto tabsNode = rJsonWriter.startNode("tabs");
+        for(auto id : GetPageIDs())
+        {
+            auto tabNode = rJsonWriter.startNode("");
+            rJsonWriter.put("text", GetPageText(id));
+            rJsonWriter.put("id", id);
+            rJsonWriter.put("name", GetPageName(id));
+        }
     }
-
-    aTree.add_child("tabs", aTabs);
-    aTree.put("selected", GetCurPageId());
-
-    return aTree;
+    rJsonWriter.put("selected", GetCurPageId());
 }
 
 sal_uInt16 NotebookbarTabControlBase::m_nHeaderHeight = 0;
diff --git a/vcl/source/window/layout.cxx b/vcl/source/window/layout.cxx
index af7208c52cb8..f09563fddaad 100644
--- a/vcl/source/window/layout.cxx
+++ b/vcl/source/window/layout.cxx
@@ -27,6 +27,7 @@
 #include <boost/property_tree/ptree.hpp>
 #include <vcl/vclmedit.hxx>
 #include <sal/log.hxx>
+#include <tools/json_writer.hxx>
 
 VclContainer::VclContainer(vcl::Window *pParent, WinBits nStyle)
     : Window(WindowType::CONTAINER)
@@ -360,11 +361,10 @@ bool VclBox::set_property(const OString &rKey, const OUString &rValue)
     return true;
 }
 
-boost::property_tree::ptree VclBox::DumpAsPropertyTree()
+void VclBox::DumpAsPropertyTree(tools::JsonWriter& rJsonWriter)
 {
-    boost::property_tree::ptree aTree(VclContainer::DumpAsPropertyTree());
-    aTree.put("vertical", m_bVerticalContainer);
-    return aTree;
+    VclContainer::DumpAsPropertyTree(rJsonWriter);
+    rJsonWriter.put("vertical", m_bVerticalContainer);
 }
 
 sal_uInt16 VclBox::getDefaultAccessibleRole() const
@@ -1308,11 +1308,10 @@ void VclGrid::setAllocation(const Size& rAllocation)
     }
 }
 
-boost::property_tree::ptree VclGrid::DumpAsPropertyTree()
+void VclGrid::DumpAsPropertyTree(tools::JsonWriter& rJsonWriter)
 {
-    boost::property_tree::ptree aTree(VclContainer::DumpAsPropertyTree());
-    aTree.put("type", "grid");
-    return aTree;
+    VclContainer::DumpAsPropertyTree(rJsonWriter);
+    rJsonWriter.put("type", "grid");
 }
 
 bool toBool(const OUString &rValue)
@@ -1493,11 +1492,10 @@ OUString VclFrame::getDefaultAccessibleName() const
     return VclBin::getDefaultAccessibleName();
 }
 
-boost::property_tree::ptree VclFrame::DumpAsPropertyTree()
+void VclFrame::DumpAsPropertyTree(tools::JsonWriter& rJsonWriter)
 {
-    boost::property_tree::ptree aTree(VclBin::DumpAsPropertyTree());
-    aTree.put("type", "frame");
-    return aTree;
+    VclBin::DumpAsPropertyTree(rJsonWriter);
+    rJsonWriter.put("type", "frame");
 }
 
 Size VclAlignment::calculateRequisition() const
@@ -2855,25 +2853,24 @@ VclScrolledWindow::~VclScrolledWindow()
     disposeOnce();
 }
 
-boost::property_tree::ptree VclDrawingArea::DumpAsPropertyTree()
+void VclDrawingArea::DumpAsPropertyTree(tools::JsonWriter& rJsonWriter)
 {
-    boost::property_tree::ptree aTree(Control::DumpAsPropertyTree());
-    aTree.put("type", "drawingarea");
+    Control::DumpAsPropertyTree(rJsonWriter);
+    rJsonWriter.put("type", "drawingarea");
+
     ScopedVclPtrInstance<VirtualDevice> pDevice;
     pDevice->SetOutputSize( GetSizePixel() );
     tools::Rectangle aRect(Point(0,0), GetSizePixel());
     Paint(*pDevice, aRect);
     BitmapEx aImage = pDevice->GetBitmapEx( Point(0,0), GetSizePixel() );
     SvMemoryStream aOStm(65535, 65535);
-
     if(GraphicConverter::Export(aOStm, aImage, ConvertDataFormat::PNG) == ERRCODE_NONE)
     {
         css::uno::Sequence<sal_Int8> aSeq( static_cast<sal_Int8 const *>(aOStm.GetData()), aOStm.Tell());
         OUStringBuffer aBuffer("data:image/png;base64,");
         ::comphelper::Base64::encode(aBuffer, aSeq);
-        aTree.put("image", aBuffer.makeStringAndClear());
+        rJsonWriter.put("image", aBuffer.makeStringAndClear());
     }
-    return aTree;
 }
 
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/source/window/toolbox2.cxx b/vcl/source/window/toolbox2.cxx
index 3d1bcd7d1739..6ee94e7b0ae5 100644
--- a/vcl/source/window/toolbox2.cxx
+++ b/vcl/source/window/toolbox2.cxx
@@ -39,6 +39,7 @@
 #include <toolbox.h>
 
 #include <unotools/confignode.hxx>
+#include <tools/json_writer.hxx>
 
 using namespace vcl;
 
@@ -1745,34 +1746,25 @@ void ToolBox::WillUsePopupMode( bool b )
     mpData->mbWillUsePopupMode = b;
 }
 
-boost::property_tree::ptree ToolBox::DumpAsPropertyTree()
+void ToolBox::DumpAsPropertyTree(tools::JsonWriter& rJsonWriter)
 {
-    boost::property_tree::ptree aTree(DockingWindow::DumpAsPropertyTree());
-    boost::property_tree::ptree aChildren;
+    DockingWindow::DumpAsPropertyTree(rJsonWriter);
 
-    boost::property_tree::ptree::const_assoc_iterator found = aTree.find("children");
-    if (found == aTree.not_found())
+    auto childrenNode = rJsonWriter.startNode("children");
+    for (ToolBox::ImplToolItems::size_type i = 0; i < GetItemCount(); ++i)
     {
-        for (ToolBox::ImplToolItems::size_type i = 0; i < GetItemCount(); ++i)
+        ToolBoxItemType type = GetItemType(i);
+        if (type == ToolBoxItemType::BUTTON)
         {
-            ToolBoxItemType type = GetItemType(i);
-            if (type == ToolBoxItemType::BUTTON)
-            {
-                boost::property_tree::ptree aEntry;
-                int nId = GetItemId(i);
-                if (!IsItemVisible(nId))
-                    continue;
-                aEntry.put("type", "toolitem");
-                aEntry.put("text", GetItemText(nId));
-                aEntry.put("command", GetItemCommand(nId));
-                aChildren.push_back(std::make_pair("", aEntry));
-            }
+            auto childNode = rJsonWriter.startNode("");
+            int nId = GetItemId(i);
+            if (!IsItemVisible(nId))
+                continue;
+            rJsonWriter.put("type", "toolitem");
+            rJsonWriter.put("text", GetItemText(nId));
+            rJsonWriter.put("command", GetItemCommand(nId));
         }
-
-        aTree.add_child("children", aChildren);
     }
-
-    return aTree;
 }
 
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/source/window/window.cxx b/vcl/source/window/window.cxx
index c3baf5e6547c..e1c498de28ac 100644
--- a/vcl/source/window/window.cxx
+++ b/vcl/source/window/window.cxx
@@ -68,6 +68,7 @@
 #include <unotools/configmgr.hxx>
 #include <osl/diagnose.h>
 #include <tools/debug.hxx>
+#include <tools/json_writer.hxx>
 #include <boost/property_tree/ptree.hpp>
 
 #include <cassert>
@@ -1768,7 +1769,7 @@ void Window::ImplNewInputContext()
     pFocusWin->ImplGetFrame()->SetInputContext( &aNewContext );
 }
 
-void Window::SetDumpAsPropertyTreeHdl(const Link<boost::property_tree::ptree&, void>& rLink)
+void Window::SetDumpAsPropertyTreeHdl(const Link<tools::JsonWriter&, void>& rLink)
 {
     if (mpWindowImpl) // may be called after dispose
     {
@@ -3380,47 +3381,34 @@ const char* windowTypeName(WindowType nWindowType)
 
 }
 
-boost::property_tree::ptree Window::DumpAsPropertyTree()
+void Window::DumpAsPropertyTree(tools::JsonWriter& rJsonWriter)
 {
-    // This is for the code in sc/source/ui/sidebar/AlignmentPropertyPanel.cxx.
-    // Also see commit f27c6320e8496d690b5d341d3718430709263a1c
-    // "lok: remove complex rotation / alignment settings"
-    if (get_id() == "textorientbox") {
-        return boost::property_tree::ptree();
-    }
-
-    boost::property_tree::ptree aTree;
-    aTree.put("id", get_id());  // TODO could be missing - sort out
-    aTree.put("type", windowTypeName(GetType()));
-    aTree.put("text", GetText());
-    aTree.put("enabled", IsEnabled());
+    rJsonWriter.put("id", get_id());  // TODO could be missing - sort out
+    rJsonWriter.put("type", windowTypeName(GetType()));
+    rJsonWriter.put("text", GetText());
+    rJsonWriter.put("enabled", IsEnabled());
 
-    boost::property_tree::ptree aChildren;
     if (vcl::Window* pChild = mpWindowImpl->mpFirstChild)
     {
+        auto childrenNode = rJsonWriter.startNode("children");
         while (pChild)
         {
             if (pChild->IsVisible()) {
-                boost::property_tree::ptree aSubTree = pChild->DumpAsPropertyTree();
-                int nLeft = pChild->get_grid_left_attach();
-                int nTop = pChild->get_grid_top_attach();
+                auto childNode = rJsonWriter.startNode("");
+                pChild->DumpAsPropertyTree(rJsonWriter);
+                sal_Int32 nLeft = pChild->get_grid_left_attach();
+                sal_Int32 nTop = pChild->get_grid_top_attach();
                 if (nLeft != -1 && nTop != -1)
                 {
-                    OUString sLeft = OUString::number(nLeft);
-                    OUString sTop = OUString::number(nTop);
-                    aSubTree.put("left", sLeft);
-                    aSubTree.put("top", sTop);
+                    rJsonWriter.put("left", nLeft);
+                    rJsonWriter.put("top", nTop);
                 }
-                aChildren.push_back(std::make_pair("", aSubTree));
             }
             pChild = pChild->mpWindowImpl->mpNext;
         }
-        aTree.add_child("children", aChildren);
     }
 
-    mpWindowImpl->maDumpAsPropertyTreeHdl.Call(aTree);
-
-    return aTree;
+    mpWindowImpl->maDumpAsPropertyTreeHdl.Call(rJsonWriter);
 }
 
 void Window::ImplCallDeactivateListeners( vcl::Window *pNew )
diff --git a/vcl/unx/gtk3/gtk3gtkinst.cxx b/vcl/unx/gtk3/gtk3gtkinst.cxx
index c38e1ebe373a..7270e3e21be5 100644
--- a/vcl/unx/gtk3/gtk3gtkinst.cxx
+++ b/vcl/unx/gtk3/gtk3gtkinst.cxx
@@ -2906,7 +2906,7 @@ public:
         return m_xDropTarget.get();
     }
 
-    virtual void connect_get_property_tree(const Link<boost::property_tree::ptree&, void>& /*rLink*/) override
+    virtual void connect_get_property_tree(const Link<tools::JsonWriter&, void>& /*rLink*/) override
     {
         //not implemented for the gtk variant
     }