loplugin:const* make some params and methods const

Change-Id: If7fbb25037343e18081a8ee7064840d75e9a45a7
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/104010
Tested-by: Noel Grandin <noel.grandin@collabora.co.uk>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

43 files changed, 87 insertions, 81 deletions

diff --git a/basegfx/source/polygon/b2dpolygontools.cxx b/basegfx/source/polygon/b2dpolygontools.cxx
index 720fb7a10e23..12401ac9756a 100644
--- a/basegfx/source/polygon/b2dpolygontools.cxx
+++ b/basegfx/source/polygon/b2dpolygontools.cxx
@@ -1150,7 +1150,7 @@ namespace basegfx::utils
 
         static void implHandleSnippet(
             const B2DPolygon& rSnippet,
-            std::function<void(const basegfx::B2DPolygon& rSnippet)>& rTargetCallback,
+            const std::function<void(const basegfx::B2DPolygon& rSnippet)>& rTargetCallback,
             B2DPolygon& rFirst,
             B2DPolygon& rLast)
         {
@@ -1177,7 +1177,7 @@ namespace basegfx::utils
         }
 
         static void implHandleFirstLast(
-            std::function<void(const basegfx::B2DPolygon& rSnippet)>& rTargetCallback,
+            const std::function<void(const basegfx::B2DPolygon& rSnippet)>& rTargetCallback,
             B2DPolygon& rFirst,
             B2DPolygon& rLast)
         {
diff --git a/basegfx/source/polygon/b3dpolygontools.cxx b/basegfx/source/polygon/b3dpolygontools.cxx
index bf982f9c3e22..ac1f3a5a8d7e 100644
--- a/basegfx/source/polygon/b3dpolygontools.cxx
+++ b/basegfx/source/polygon/b3dpolygontools.cxx
@@ -119,7 +119,7 @@ namespace basegfx::utils
 
         static void implHandleSnippet(
             const B3DPolygon& rSnippet,
-            std::function<void(const basegfx::B3DPolygon& rSnippet)>& rTargetCallback,
+            const std::function<void(const basegfx::B3DPolygon& rSnippet)>& rTargetCallback,
             B3DPolygon& rFirst,
             B3DPolygon& rLast)
         {
@@ -146,7 +146,7 @@ namespace basegfx::utils
         }
 
         static void implHandleFirstLast(
-            std::function<void(const basegfx::B3DPolygon& rSnippet)>& rTargetCallback,
+            const std::function<void(const basegfx::B3DPolygon& rSnippet)>& rTargetCallback,
             B3DPolygon& rFirst,
             B3DPolygon& rLast)
         {
diff --git a/comphelper/source/misc/lok.cxx b/comphelper/source/misc/lok.cxx
index 8f26be08c49d..c0e0726b7440 100644
--- a/comphelper/source/misc/lok.cxx
+++ b/comphelper/source/misc/lok.cxx
@@ -51,7 +51,7 @@ public:
         , maLocaleLanguageTag(LANGUAGE_NONE)
     {}
 
-    const LanguageTag& getLanguage()
+    const LanguageTag& getLanguage() const
     {
         return maLanguageTag;
     }
@@ -65,7 +65,7 @@ public:
         }
     }
 
-    const LanguageTag& getLocale()
+    const LanguageTag& getLocale() const
     {
         return maLocaleLanguageTag;
     }
diff --git a/include/registry/registry.hxx b/include/registry/registry.hxx
index 76eb45e2648e..3c81c41e077f 100644
--- a/include/registry/registry.hxx
+++ b/include/registry/registry.hxx
@@ -316,7 +316,7 @@ private:
         @param pValueList points to a value list.
         @param length specifies the length of the list.
      */
-    void setValueList(Registry& registry, RegValueType valueType,
+    void setValueList(const Registry& registry, RegValueType valueType,
                       ValueType* pValueList, sal_uInt32 length)
     {
         m_length = length;
diff --git a/include/svl/zformat.hxx b/include/svl/zformat.hxx
index 3309c7bbc0f4..c1a6f7388ec9 100644
--- a/include/svl/zformat.hxx
+++ b/include/svl/zformat.hxx
@@ -106,7 +106,7 @@ public:
     void Enlarge(sal_uInt16 nCount);    // Init of arrays to the right size
 
     // if pSc is set, it is used to get the Color pointer
-    void Copy( const ImpSvNumFor& rNumFor, ImpSvNumberformatScan* pSc );
+    void Copy( const ImpSvNumFor& rNumFor, const ImpSvNumberformatScan* pSc );
 
     // Access to Info; call Enlarge before!
     ImpSvNumberformatInfo& Info() { return aI;}
diff --git a/include/vcl/GraphicObject.hxx b/include/vcl/GraphicObject.hxx
index 7997fabcec67..c900bb02cbf7 100644
--- a/include/vcl/GraphicObject.hxx
+++ b/include/vcl/GraphicObject.hxx
@@ -269,7 +269,7 @@ public:
                                 OutputDevice* pFirstFrameOutDev = nullptr
                             );
 
-    void                    StopAnimation( OutputDevice* pOut = nullptr, long nExtraData = 0 );
+    void                    StopAnimation( const OutputDevice* pOut = nullptr, long nExtraData = 0 );
 
     static bool isGraphicObjectUniqueIdURL(OUString const & rURL);
 
diff --git a/include/vcl/WeldedTabbedNotebookbar.hxx b/include/vcl/WeldedTabbedNotebookbar.hxx
index d0549d25d019..59190425ecfe 100644
--- a/include/vcl/WeldedTabbedNotebookbar.hxx
+++ b/include/vcl/WeldedTabbedNotebookbar.hxx
@@ -25,7 +25,8 @@ class VCL_DLLPUBLIC WeldedTabbedNotebookbar
     std::unique_ptr<weld::Notebook> m_xNotebook;
 
 public:
-    WeldedTabbedNotebookbar(VclPtr<vcl::Window>& pContainerWindow, const OUString& rUIFilePath,
+    WeldedTabbedNotebookbar(const VclPtr<vcl::Window>& pContainerWindow,
+                            const OUString& rUIFilePath,
                             const css::uno::Reference<css::frame::XFrame>& rFrame,
                             sal_uInt64 nWindowId);
 };
diff --git a/include/vcl/animate/Animation.hxx b/include/vcl/animate/Animation.hxx
index c606fb7a85fe..e355d7d1e2a1 100644
--- a/include/vcl/animate/Animation.hxx
+++ b/include/vcl/animate/Animation.hxx
@@ -44,7 +44,7 @@ public:
     bool Start(OutputDevice* pOutDev, const Point& rDestPt, const Size& rDestSz, long nExtraData,
                OutputDevice* pFirstFrameOutDev);
 
-    void Stop(OutputDevice* pOutDev = nullptr, long nExtraData = 0);
+    void Stop(const OutputDevice* pOutDev = nullptr, long nExtraData = 0);
 
     void Draw(OutputDevice* pOutDev, const Point& rDestPt) const;
     void Draw(OutputDevice* pOutDev, const Point& rDestPt, const Size& rDestSz) const;
diff --git a/include/vcl/filter/PDFiumLibrary.hxx b/include/vcl/filter/PDFiumLibrary.hxx
index 205f8cc62ca6..6f3d94925122 100644
--- a/include/vcl/filter/PDFiumLibrary.hxx
+++ b/include/vcl/filter/PDFiumLibrary.hxx
@@ -51,7 +51,7 @@ public:
     PDFium();
     ~PDFium();
 
-    OUString getLastError() { return maLastError; }
+    OUString getLastError() const { return maLastError; }
 
     std::unique_ptr<PDFiumDocument> openDocument(const void* pData, int nSize);
 };
@@ -95,10 +95,10 @@ public:
     PDFiumPathSegment(FPDF_PATHSEGMENT pPathSegment);
     ~PDFiumPathSegment();
 
-    FPDF_PATHSEGMENT getPointer() { return mpPathSegment; }
-    basegfx::B2DPoint getPoint();
-    bool isClosed();
-    int getType();
+    FPDF_PATHSEGMENT getPointer() const { return mpPathSegment; }
+    basegfx::B2DPoint getPoint() const;
+    bool isClosed() const;
+    int getType() const;
 };
 
 class VCL_DLLPUBLIC PDFiumPageObject final
diff --git a/include/vcl/graph.hxx b/include/vcl/graph.hxx
index 1880041b4ba5..0a8ddaf0173d 100644
--- a/include/vcl/graph.hxx
+++ b/include/vcl/graph.hxx
@@ -160,7 +160,7 @@ public:
                           const Size& rDestSize,
                           long nExtraData = 0,
                           OutputDevice* pFirstFrameOutDev = nullptr );
-    void            StopAnimation( OutputDevice* pOutputDevice,
+    void            StopAnimation( const OutputDevice* pOutputDevice,
                           long nExtraData );
 
     void            SetAnimationNotifyHdl( const Link<Animation*,void>& rLink );
diff --git a/include/vcl/layout.hxx b/include/vcl/layout.hxx
index f69acab4b1b1..e15f49b96d58 100644
--- a/include/vcl/layout.hxx
+++ b/include/vcl/layout.hxx
@@ -805,7 +805,7 @@ public:
     {
         m_aStartDragHdl = rLink;
     }
-    void SetDragHelper(rtl::Reference<TransferDataContainer>& rHelper, sal_uInt8 eDNDConstants)
+    void SetDragHelper(const rtl::Reference<TransferDataContainer>& rHelper, sal_uInt8 eDNDConstants)
     {
         m_xTransferHelper = rHelper;
         m_nDragAction = eDNDConstants;
@@ -866,7 +866,7 @@ Size getLegacyBestSizeForChildren(const vcl::Window &rWindow);
 vcl::Window* getNonLayoutParent(vcl::Window *pParent);
 
 //Sort ok/cancel etc buttons in platform order
-void sort_native_button_order(VclBox& rContainer);
+void sort_native_button_order(const VclBox& rContainer);
 
 #endif
 
diff --git a/include/vcl/notebookbar.hxx b/include/vcl/notebookbar.hxx
index 75383b9d2d7c..fa58dda4bbbf 100644
--- a/include/vcl/notebookbar.hxx
+++ b/include/vcl/notebookbar.hxx
@@ -48,9 +48,9 @@ public:
     void ControlListenerForCurrentController(bool bListen);
     void StopListeningAllControllers();
 
-    bool IsWelded() { return m_bIsWelded; }
+    bool IsWelded() const { return m_bIsWelded; }
     VclPtr<vcl::Window>& GetMainContainer() { return m_xVclContentArea; }
-    OUString GetUIFilePath() { return m_sUIXMLDescription; }
+    OUString GetUIFilePath() const { return m_sUIXMLDescription; }
     void SetDisposeCallback(const Link<const SfxViewShell*, void> rDisposeCallback, const SfxViewShell* pViewShell);
 
 private:
diff --git a/include/vcl/toolkit/treelistbox.hxx b/include/vcl/toolkit/treelistbox.hxx
index ea1038edeb09..3ef56b39d67c 100644
--- a/include/vcl/toolkit/treelistbox.hxx
+++ b/include/vcl/toolkit/treelistbox.hxx
@@ -435,14 +435,14 @@ public:
     // Return value: TRISTATE_TRUE == Ok, TRISTATE_FALSE == Cancel, TRISTATE_INDET == Ok and Make visible moved entry
     TriState NotifyMoving(
         SvTreeListEntry*  pTarget,       // D'n'D DropPosition in GetModel()
-        SvTreeListEntry*  pEntry,        // Entry to be moved from GetSourceListBox()->GetModel()
+        const SvTreeListEntry*  pEntry,        // Entry to be moved from GetSourceListBox()->GetModel()
         SvTreeListEntry*& rpNewParent,   // New TargetParent
         sal_uLong&        rNewChildPos); // The TargetParent's position in Childlist
 
     // Return value: TRISTATE_TRUE == Ok, TRISTATE_FALSE == Cancel, TRISTATE_INDET == Ok and Make visible moved entry
     TriState    NotifyCopying(
         SvTreeListEntry*  pTarget,       // D'n'D DropPosition in GetModel()
-        SvTreeListEntry*  pEntry,        // Entry to be copied from GetSourceListBox()->GetModel()
+        const SvTreeListEntry*  pEntry,        // Entry to be copied from GetSourceListBox()->GetModel()
         SvTreeListEntry*& rpNewParent,   // New TargetParent
         sal_uLong&        rNewChildPos); // The TargetParent's position in Childlist
 
@@ -631,7 +631,7 @@ public:
 
     virtual tools::Rectangle GetFocusRect(const SvTreeListEntry*, long nLine );
     // Respects indentation
-    sal_IntPtr      GetTabPos(const SvTreeListEntry*, SvLBoxTab*);
+    sal_IntPtr      GetTabPos(const SvTreeListEntry*, const SvLBoxTab*);
     void            InvalidateEntry( SvTreeListEntry* );
     SvLBoxItem*     GetItem( SvTreeListEntry*, long nX, SvLBoxTab** ppTab);
     SvLBoxItem*     GetItem( SvTreeListEntry*, long nX );
@@ -684,7 +684,7 @@ public:
 
     virtual FactoryFunction GetUITestFactory() const override;
 
-    void            SetDragHelper(rtl::Reference<TransferDataContainer>& rHelper, sal_uInt8 eDNDConstants);
+    void            SetDragHelper(const rtl::Reference<TransferDataContainer>& rHelper, sal_uInt8 eDNDConstants);
 };
 
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/vcl/weld.hxx b/include/vcl/weld.hxx
index e12ef94eb71f..6f227c7cbb6a 100644
--- a/include/vcl/weld.hxx
+++ b/include/vcl/weld.hxx
@@ -1903,7 +1903,7 @@ public:
     {
         m_xSpinButton->connect_focus_out(rLink);
     }
-    OString get_buildable_name() { return m_xSpinButton->get_buildable_name(); }
+    OString get_buildable_name() const { return m_xSpinButton->get_buildable_name(); }
     void set_help_id(const OString& rName) { m_xSpinButton->set_help_id(rName); }
     void set_position(int nCursorPos) { m_xSpinButton->set_position(nCursorPos); }
     // set the width of the underlying widget in characters, this setting is
diff --git a/include/vcl/weldutils.hxx b/include/vcl/weldutils.hxx
index 0c892427f45d..9a29e89d7b5f 100644
--- a/include/vcl/weldutils.hxx
+++ b/include/vcl/weldutils.hxx
@@ -183,7 +183,7 @@ public:
 
     void SAL_CALL disposing(const css::lang::EventObject& /*Source*/) override;
 
-    const css::uno::Reference<css::frame::XFrame>& getFrame() { return mxFrame; }
+    const css::uno::Reference<css::frame::XFrame>& getFrame() const { return mxFrame; }
 
     void startListening();
 
diff --git a/svl/source/numbers/zformat.cxx b/svl/source/numbers/zformat.cxx
index b7df3a6a9ca4..550fdd8695fb 100644
--- a/svl/source/numbers/zformat.cxx
+++ b/svl/source/numbers/zformat.cxx
@@ -237,7 +237,7 @@ void ImpSvNumFor::Enlarge(sal_uInt16 nCnt)
     }
 }
 
-void ImpSvNumFor::Copy( const ImpSvNumFor& rNumFor, ImpSvNumberformatScan* pSc )
+void ImpSvNumFor::Copy( const ImpSvNumFor& rNumFor, const ImpSvNumberformatScan* pSc )
 {
     Enlarge( rNumFor.nStringsCnt );
     aI.Copy( rNumFor.aI, nStringsCnt );
diff --git a/tools/source/stream/strmunx.cxx b/tools/source/stream/strmunx.cxx
index 9a55831e26f2..249af86fc90f 100644
--- a/tools/source/stream/strmunx.cxx
+++ b/tools/source/stream/strmunx.cxx
@@ -42,7 +42,7 @@ struct LockMutex : public rtl::Static< osl::Mutex, LockMutex > {};
 
 struct Locks : public rtl::Static< std::map<SvFileStream const *, osl::DirectoryItem>, Locks > {};
 
-bool lockFile( SvFileStream* pStream )
+bool lockFile( const SvFileStream* pStream )
 {
     osl::DirectoryItem aItem;
     if (osl::DirectoryItem::get( pStream->GetFileName(), aItem) != osl::FileBase::E_None )
diff --git a/vcl/backendtest/outputdevice/bitmap.cxx b/vcl/backendtest/outputdevice/bitmap.cxx
index 79cd3d3795cd..657f840ef178 100644
--- a/vcl/backendtest/outputdevice/bitmap.cxx
+++ b/vcl/backendtest/outputdevice/bitmap.cxx
@@ -175,7 +175,7 @@ TestResult OutputDeviceTestBitmap::checkMask(Bitmap& rBitmap)
     return checkRectangle(rBitmap);
 }
 
-TestResult OutputDeviceTestBitmap::checkBlend(BitmapEx& rBitmapEx)
+TestResult OutputDeviceTestBitmap::checkBlend(const BitmapEx& rBitmapEx)
 {
     const Color aBlendedColor(0xEE, 0xEE, 0x33);
 
diff --git a/vcl/inc/impgraph.hxx b/vcl/inc/impgraph.hxx
index 9a82caade324..aee0d1839b31 100644
--- a/vcl/inc/impgraph.hxx
+++ b/vcl/inc/impgraph.hxx
@@ -159,7 +159,7 @@ private:
                                             const Size& rDestSize,
                                             long nExtraData,
                                             OutputDevice* pFirstFrameOutDev );
-    void                ImplStopAnimation( OutputDevice* pOutputDevice,
+    void                ImplStopAnimation( const OutputDevice* pOutputDevice,
                                            long nExtraData );
 
     void                ImplSetAnimationNotifyHdl( const Link<Animation*,void>& rLink );
@@ -206,7 +206,7 @@ public:
     bool swapIn();
     bool swapOut();
     bool isSwappedOut() const { return mbSwapOut; }
-    OUString getSwapFileURL();
+    OUString getSwapFileURL() const;
 };
 
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/inc/sft.hxx b/vcl/inc/sft.hxx
index 8711364ed46f..6a844002711d 100644
--- a/vcl/inc/sft.hxx
+++ b/vcl/inc/sft.hxx
@@ -680,7 +680,7 @@ class TrueTypeFont;
  * @return            true, if table data could be decoded
  * @ingroup sft
  */
-    VCL_DLLPUBLIC bool GetTTGlobalFontHeadInfo(AbstractTrueTypeFont *ttf, int& xMin, int& yMin, int& xMax, int& yMax, sal_uInt16& macStyle);
+    VCL_DLLPUBLIC bool GetTTGlobalFontHeadInfo(const AbstractTrueTypeFont *ttf, int& xMin, int& yMin, int& xMax, int& yMax, sal_uInt16& macStyle);
 
 /**
  * Returns fonts metrics.
diff --git a/vcl/inc/skia/utils.hxx b/vcl/inc/skia/utils.hxx
index 473edfdf0d3f..b3a2045eea96 100644
--- a/vcl/inc/skia/utils.hxx
+++ b/vcl/inc/skia/utils.hxx
@@ -64,7 +64,7 @@ void removeCachedImage(sk_sp<SkImage> image);
 constexpr int MAX_CACHE_SIZE = 4 * 2000 * 2000 * 4; // 4x 2000px 32bpp images, 64MiB
 
 #ifdef DBG_UTIL
-void prefillSurface(sk_sp<SkSurface>& surface);
+void prefillSurface(const sk_sp<SkSurface>& surface);
 VCL_DLLPUBLIC void dump(const SkBitmap& bitmap, const char* file);
 VCL_DLLPUBLIC void dump(const sk_sp<SkImage>& image, const char* file);
 VCL_DLLPUBLIC void dump(const sk_sp<SkSurface>& surface, const char* file);
diff --git a/vcl/inc/svimpbox.hxx b/vcl/inc/svimpbox.hxx
index 3def46700396..92d5754387c7 100644
--- a/vcl/inc/svimpbox.hxx
+++ b/vcl/inc/svimpbox.hxx
@@ -300,7 +300,7 @@ public:
     void                ShowCursor( bool bShow );
 
     bool                RequestHelp( const HelpEvent& rHEvt );
-    bool                IsNodeButton( const Point& rPosPixel, SvTreeListEntry* pEntry ) const;
+    bool                IsNodeButton( const Point& rPosPixel, const SvTreeListEntry* pEntry ) const;
     void                SetUpdateMode( bool bMode );
     bool                GetUpdateMode() const { return m_bUpdateMode; }
     tools::Rectangle    GetClipRegionRect() const;
diff --git a/vcl/inc/test/outputdevice.hxx b/vcl/inc/test/outputdevice.hxx
index 293e817d35e9..c0d9a61cdb10 100644
--- a/vcl/inc/test/outputdevice.hxx
+++ b/vcl/inc/test/outputdevice.hxx
@@ -102,7 +102,7 @@ public:
     static TestResult checkTransformedBitmap(Bitmap& rBitmap);
     static TestResult checkBitmapExWithAlpha(Bitmap& rBitmap);
     static TestResult checkMask(Bitmap& rBitmap);
-    static TestResult checkBlend(BitmapEx& rBitmap);
+    static TestResult checkBlend(const BitmapEx& rBitmap);
 };
 
 class VCL_DLLPUBLIC OutputDeviceTestAnotherOutDev : public OutputDeviceTestCommon
diff --git a/vcl/inc/unx/glyphcache.hxx b/vcl/inc/unx/glyphcache.hxx
index 993a0cf49a22..4e409560a981 100644
--- a/vcl/inc/unx/glyphcache.hxx
+++ b/vcl/inc/unx/glyphcache.hxx
@@ -141,7 +141,7 @@ private:
     friend class FreetypeFontInstance;
     friend class FreetypeManager;
 
-    explicit FreetypeFont(FreetypeFontInstance&, std::shared_ptr<FreetypeFontInfo>& rFontInfo);
+    explicit FreetypeFont(FreetypeFontInstance&, const std::shared_ptr<FreetypeFontInfo>& rFontInfo);
 
     void                    ApplyGlyphTransform(bool bVertical, FT_Glyph) const;
 
diff --git a/vcl/inc/unx/saldisp.hxx b/vcl/inc/unx/saldisp.hxx
index b5bed8e60b54..660a87ac47f7 100644
--- a/vcl/inc/unx/saldisp.hxx
+++ b/vcl/inc/unx/saldisp.hxx
@@ -325,7 +325,7 @@ public:
 
 #ifdef DBG_UTIL
     void            PrintInfo() const;
-    void            DbgPrintDisplayEvent(const char *pComment, XEvent *pEvent) const;
+    void            DbgPrintDisplayEvent(const char *pComment, const XEvent *pEvent) const;
 #endif
 
     void            Beep() const;
diff --git a/vcl/skia/SkiaHelper.cxx b/vcl/skia/SkiaHelper.cxx
index f9b231d87ce6..2d185bab149b 100644
--- a/vcl/skia/SkiaHelper.cxx
+++ b/vcl/skia/SkiaHelper.cxx
@@ -573,7 +573,7 @@ void prepareSkia(std::unique_ptr<sk_app::WindowContext> (*createVulkanWindowCont
 }
 
 #ifdef DBG_UTIL
-void prefillSurface(sk_sp<SkSurface>& surface)
+void prefillSurface(const sk_sp<SkSurface>& surface)
 {
     // Pre-fill the surface with deterministic garbage.
     SkBitmap bitmap;
diff --git a/vcl/source/animate/Animation.cxx b/vcl/source/animate/Animation.cxx
index 2b799dabf3af..f788c7be123f 100644
--- a/vcl/source/animate/Animation.cxx
+++ b/vcl/source/animate/Animation.cxx
@@ -215,7 +215,7 @@ bool Animation::Start(OutputDevice* pOut, const Point& rDestPt, const Size& rDes
     return bRet;
 }
 
-void Animation::Stop(OutputDevice* pOut, long nExtraData)
+void Animation::Stop(const OutputDevice* pOut, long nExtraData)
 {
     maViewList.erase(std::remove_if(maViewList.begin(), maViewList.end(),
                                     [=](const std::unique_ptr<ImplAnimView>& pAnimView) -> bool {
diff --git a/vcl/source/app/salvtables.cxx b/vcl/source/app/salvtables.cxx
index 3670f5a1f709..40f5ef8be163 100644
--- a/vcl/source/app/salvtables.cxx
+++ b/vcl/source/app/salvtables.cxx
@@ -3424,7 +3424,7 @@ private:
 
     void do_insert(const weld::TreeIter* pParent, int pos, const OUString* pStr,
                    const OUString* pId, const OUString* pIconName,
-                   VirtualDevice* pImageSurface, bool bChildrenOnDemand,
+                   const VirtualDevice* pImageSurface, bool bChildrenOnDemand,
                    weld::TreeIter* pRet, bool bIsSeparator)
     {
         disable_notify_events();
diff --git a/vcl/source/bitmap/BitmapBasicMorphologyFilter.cxx b/vcl/source/bitmap/BitmapBasicMorphologyFilter.cxx
index 5cf24ec2f101..9ee1ad3822b4 100644
--- a/vcl/source/bitmap/BitmapBasicMorphologyFilter.cxx
+++ b/vcl/source/bitmap/BitmapBasicMorphologyFilter.cxx
@@ -74,13 +74,13 @@ template <typename MorphologyOp, int nComponentWidth> struct Value
                     bLookOutside ? rShared.mnOutsideVal : MorphologyOp::initVal);
     }
 
-    void apply(BitmapReadAccess* pReadAccess, long x, long y, sal_uInt8* pHint = nullptr)
+    void apply(const BitmapReadAccess* pReadAccess, long x, long y, sal_uInt8* pHint = nullptr)
     {
         sal_uInt8* pSource = (pHint ? pHint : pReadAccess->GetScanline(y)) + nWidthBytes * x;
         std::transform(pSource, pSource + nWidthBytes, aResult, aResult, MorphologyOp::apply);
     }
 
-    void copy(BitmapWriteAccess* pWriteAccess, long x, long y, sal_uInt8* pHint = nullptr)
+    void copy(const BitmapWriteAccess* pWriteAccess, long x, long y, sal_uInt8* pHint = nullptr)
     {
         sal_uInt8* pDest = (pHint ? pHint : pWriteAccess->GetScanline(y)) + nWidthBytes * x;
         std::copy_n(aResult, nWidthBytes, pDest);
@@ -102,7 +102,7 @@ template <typename MorphologyOp> struct Value<MorphologyOp, 0>
     {
     }
 
-    void apply(BitmapReadAccess* pReadAccess, long x, long y, sal_uInt8* /*pHint*/ = nullptr)
+    void apply(const BitmapReadAccess* pReadAccess, long x, long y, sal_uInt8* /*pHint*/ = nullptr)
     {
         const auto& rSource = pReadAccess->GetColor(y, x);
         aResult = Color(MorphologyOp::apply(rSource.GetTransparency(), aResult.GetTransparency()),
diff --git a/vcl/source/bitmap/BitmapFilterStackBlur.cxx b/vcl/source/bitmap/BitmapFilterStackBlur.cxx
index a9e17eee2cd2..6883808ebe4a 100644
--- a/vcl/source/bitmap/BitmapFilterStackBlur.cxx
+++ b/vcl/source/bitmap/BitmapFilterStackBlur.cxx
@@ -101,9 +101,12 @@ struct BlurArrays
         }
     }
 
-    long getMultiplyValue() { return static_cast<long>(constMultiplyTable[maShared.mnRadius]); }
+    long getMultiplyValue() const
+    {
+        return static_cast<long>(constMultiplyTable[maShared.mnRadius]);
+    }
 
-    long getShiftValue() { return static_cast<long>(constShiftTable[maShared.mnRadius]); }
+    long getShiftValue() const { return static_cast<long>(constShiftTable[maShared.mnRadius]); }
 };
 
 typedef void (*BlurRangeFn)(BlurSharedData const& rShared, long nStartY, long nEndY);
@@ -145,42 +148,43 @@ struct SumFunction24
         pValue1[2] = nConstant;
     }
 
-    static inline void add(long*& pValue1, sal_uInt8*& pValue2)
+    static inline void add(long*& pValue1, const sal_uInt8* pValue2)
     {
         pValue1[0] += pValue2[0];
         pValue1[1] += pValue2[1];
         pValue1[2] += pValue2[2];
     }
 
-    static inline void add(long*& pValue1, long*& pValue2)
+    static inline void add(long*& pValue1, const long* pValue2)
     {
         pValue1[0] += pValue2[0];
         pValue1[1] += pValue2[1];
         pValue1[2] += pValue2[2];
     }
 
-    static inline void sub(long*& pValue1, sal_uInt8*& pValue2)
+    static inline void sub(long*& pValue1, const sal_uInt8* pValue2)
     {
         pValue1[0] -= pValue2[0];
         pValue1[1] -= pValue2[1];
         pValue1[2] -= pValue2[2];
     }
 
-    static inline void sub(long*& pValue1, long*& pValue2)
+    static inline void sub(long*& pValue1, const long* pValue2)
     {
         pValue1[0] -= pValue2[0];
         pValue1[1] -= pValue2[1];
         pValue1[2] -= pValue2[2];
     }
 
-    static inline void assignPtr(sal_uInt8*& pValue1, sal_uInt8*& pValue2)
+    static inline void assignPtr(sal_uInt8*& pValue1, const sal_uInt8* pValue2)
     {
         pValue1[0] = pValue2[0];
         pValue1[1] = pValue2[1];
         pValue1[2] = pValue2[2];
     }
 
-    static inline void assignMulAndShr(sal_uInt8*& result, long*& sum, long multiply, long shift)
+    static inline void assignMulAndShr(sal_uInt8*& result, const long* sum, long multiply,
+                                       long shift)
     {
         result[0] = (multiply * sum[0]) >> shift;
         result[1] = (multiply * sum[1]) >> shift;
@@ -194,20 +198,21 @@ struct SumFunction8
 
     static inline void set(long*& pValue1, long nConstant) { pValue1[0] = nConstant; }
 
-    static inline void add(long*& pValue1, sal_uInt8*& pValue2) { pValue1[0] += pValue2[0]; }
+    static inline void add(long*& pValue1, const sal_uInt8* pValue2) { pValue1[0] += pValue2[0]; }
 
-    static inline void add(long*& pValue1, long*& pValue2) { pValue1[0] += pValue2[0]; }
+    static inline void add(long*& pValue1, const long* pValue2) { pValue1[0] += pValue2[0]; }
 
-    static inline void sub(long*& pValue1, sal_uInt8*& pValue2) { pValue1[0] -= pValue2[0]; }
+    static inline void sub(long*& pValue1, const sal_uInt8* pValue2) { pValue1[0] -= pValue2[0]; }
 
-    static inline void sub(long*& pValue1, long*& pValue2) { pValue1[0] -= pValue2[0]; }
+    static inline void sub(long*& pValue1, const long* pValue2) { pValue1[0] -= pValue2[0]; }
 
-    static inline void assignPtr(sal_uInt8*& pValue1, sal_uInt8*& pValue2)
+    static inline void assignPtr(sal_uInt8*& pValue1, const sal_uInt8* pValue2)
     {
         pValue1[0] = pValue2[0];
     }
 
-    static inline void assignMulAndShr(sal_uInt8*& result, long*& sum, long multiply, long shift)
+    static inline void assignMulAndShr(sal_uInt8*& result, const long* sum, long multiply,
+                                       long shift)
     {
         result[0] = (multiply * sum[0]) >> shift;
     }
diff --git a/vcl/source/control/WeldedTabbedNotebookbar.cxx b/vcl/source/control/WeldedTabbedNotebookbar.cxx
index 3f701d08109c..e0089c604271 100644
--- a/vcl/source/control/WeldedTabbedNotebookbar.cxx
+++ b/vcl/source/control/WeldedTabbedNotebookbar.cxx
@@ -12,7 +12,7 @@
 #include <jsdialog/jsdialogbuilder.hxx>
 
 WeldedTabbedNotebookbar::WeldedTabbedNotebookbar(
-    VclPtr<vcl::Window>& pContainerWindow, const OUString& rUIFilePath,
+    const VclPtr<vcl::Window>& pContainerWindow, const OUString& rUIFilePath,
     const css::uno::Reference<css::frame::XFrame>& rFrame, sal_uInt64 nWindowId)
     : m_xBuilder(new JSInstanceBuilder(pContainerWindow, AllSettings::GetUIRootDir(), rUIFilePath,
                                        rFrame, nWindowId))
diff --git a/vcl/source/control/field2.cxx b/vcl/source/control/field2.cxx
index 8df442fff60b..7fbeed108d99 100644
--- a/vcl/source/control/field2.cxx
+++ b/vcl/source/control/field2.cxx
@@ -785,7 +785,7 @@ static bool ImplPatternProcessKeyInput( IEditImplementation& rEdit, const KeyEve
 
 namespace
 {
-    bool ImplSetMask(OString& rEditMask, OUString& rLiteralMask)
+    bool ImplSetMask(const OString& rEditMask, OUString& rLiteralMask)
     {
         bool bSameMask      = true;
 
diff --git a/vcl/source/filter/ipdf/pdfread.cxx b/vcl/source/filter/ipdf/pdfread.cxx
index a9b079a75bc3..5e113ff2aba8 100644
--- a/vcl/source/filter/ipdf/pdfread.cxx
+++ b/vcl/source/filter/ipdf/pdfread.cxx
@@ -244,8 +244,8 @@ bool ImportPDF(SvStream& rStream, Graphic& rGraphic)
 #if HAVE_FEATURE_PDFIUM
 namespace
 {
-std::vector<PDFGraphicAnnotation> findAnnotations(std::unique_ptr<vcl::pdf::PDFiumPage>& pPage,
-                                                  basegfx::B2DSize aPageSize)
+std::vector<PDFGraphicAnnotation>
+findAnnotations(const std::unique_ptr<vcl::pdf::PDFiumPage>& pPage, basegfx::B2DSize aPageSize)
 {
     std::vector<PDFGraphicAnnotation> aPDFGraphicAnnotations;
     for (int nAnnotation = 0; nAnnotation < pPage->getAnnotationCount(); nAnnotation++)
diff --git a/vcl/source/fontsubset/sft.cxx b/vcl/source/fontsubset/sft.cxx
index 6aba6d6d48d2..9fcf26f97d9c 100644
--- a/vcl/source/fontsubset/sft.cxx
+++ b/vcl/source/fontsubset/sft.cxx
@@ -2004,7 +2004,7 @@ void GetTTFontMetrics(const uint8_t *pHhea, size_t nHhea,
     }
 }
 
-bool GetTTGlobalFontHeadInfo(AbstractTrueTypeFont *ttf, int& xMin, int& yMin, int& xMax, int& yMax, sal_uInt16& macStyle)
+bool GetTTGlobalFontHeadInfo(const AbstractTrueTypeFont *ttf, int& xMin, int& yMin, int& xMax, int& yMax, sal_uInt16& macStyle)
 {
     sal_uInt32 table_size;
     const sal_uInt8* table = ttf->table(O_head, table_size);
diff --git a/vcl/source/gdi/graph.cxx b/vcl/source/gdi/graph.cxx
index b88aaf0e9f3f..1fe6dac8cc10 100644
--- a/vcl/source/gdi/graph.cxx
+++ b/vcl/source/gdi/graph.cxx
@@ -448,7 +448,7 @@ void Graphic::StartAnimation( OutputDevice* pOutDev, const Point& rDestPt,
     mxImpGraphic->ImplStartAnimation( pOutDev, rDestPt, rDestSz, nExtraData, pFirstFrameOutDev );
 }
 
-void Graphic::StopAnimation( OutputDevice* pOutDev, long nExtraData )
+void Graphic::StopAnimation( const OutputDevice* pOutDev, long nExtraData )
 {
     ImplTestRefCount();
     mxImpGraphic->ImplStopAnimation( pOutDev, nExtraData );
diff --git a/vcl/source/gdi/impgraph.cxx b/vcl/source/gdi/impgraph.cxx
index 979166f118aa..f9afa788973e 100644
--- a/vcl/source/gdi/impgraph.cxx
+++ b/vcl/source/gdi/impgraph.cxx
@@ -85,17 +85,17 @@ public:
         utl::UCBContentHelper::Kill(maSwapURL.GetMainURL(INetURLObject::DecodeMechanism::NONE));
     }
 
-    INetURLObject getSwapURL()
+    INetURLObject getSwapURL() const
     {
         return maSwapURL;
     }
 
-    OUString getSwapURLString()
+    OUString getSwapURLString() const
     {
         return maSwapURL.GetMainURL(INetURLObject::DecodeMechanism::NONE);
     }
 
-    OUString const & getOriginURL() { return maOriginURL; }
+    OUString const & getOriginURL() const { return maOriginURL; }
 
     std::unique_ptr<SvStream> openOutputStream()
     {
@@ -114,7 +114,7 @@ public:
     }
 };
 
-OUString ImpGraphic::getSwapFileURL()
+OUString ImpGraphic::getSwapFileURL() const
 {
     if (mpSwapFile)
         return mpSwapFile->getSwapURL().GetMainURL(INetURLObject::DecodeMechanism::NONE);
@@ -1091,7 +1091,7 @@ void ImpGraphic::ImplStartAnimation( OutputDevice* pOutDev, const Point& rDestPt
         mpAnimation->Start( pOutDev, rDestPt, rDestSize, nExtraData, pFirstFrameOutDev );
 }
 
-void ImpGraphic::ImplStopAnimation( OutputDevice* pOutDev, long nExtraData )
+void ImpGraphic::ImplStopAnimation( const OutputDevice* pOutDev, long nExtraData )
 {
     ensureAvailable();
 
diff --git a/vcl/source/graphic/GraphicObject.cxx b/vcl/source/graphic/GraphicObject.cxx
index 1e83722a559b..d44a4bdafe78 100644
--- a/vcl/source/graphic/GraphicObject.cxx
+++ b/vcl/source/graphic/GraphicObject.cxx
@@ -591,7 +591,7 @@ bool GraphicObject::StartAnimation( OutputDevice* pOut, const Point& rPt, const
     return bRet;
 }
 
-void GraphicObject::StopAnimation( OutputDevice* pOut, long nExtraData )
+void GraphicObject::StopAnimation( const OutputDevice* pOut, long nExtraData )
 {
     if (mxSimpleCache)
         mxSimpleCache->maGraphic.StopAnimation(pOut, nExtraData);
diff --git a/vcl/source/pdf/PDFiumLibrary.cxx b/vcl/source/pdf/PDFiumLibrary.cxx
index dc31eb4fb952..d790fb1b9c01 100644
--- a/vcl/source/pdf/PDFiumLibrary.cxx
+++ b/vcl/source/pdf/PDFiumLibrary.cxx
@@ -387,7 +387,7 @@ PDFiumPathSegment::PDFiumPathSegment(FPDF_PATHSEGMENT pPathSegment)
 
 PDFiumPathSegment::~PDFiumPathSegment() {}
 
-basegfx::B2DPoint PDFiumPathSegment::getPoint()
+basegfx::B2DPoint PDFiumPathSegment::getPoint() const
 {
     basegfx::B2DPoint aPoint;
     float fx, fy;
@@ -396,9 +396,9 @@ basegfx::B2DPoint PDFiumPathSegment::getPoint()
     return aPoint;
 }
 
-bool PDFiumPathSegment::isClosed() { return FPDFPathSegment_GetClose(mpPathSegment); }
+bool PDFiumPathSegment::isClosed() const { return FPDFPathSegment_GetClose(mpPathSegment); }
 
-int PDFiumPathSegment::getType() { return FPDFPathSegment_GetType(mpPathSegment); }
+int PDFiumPathSegment::getType() const { return FPDFPathSegment_GetType(mpPathSegment); }
 
 PDFiumAnnotation::PDFiumAnnotation(FPDF_ANNOTATION pAnnotation)
     : mpAnnotation(pAnnotation)
diff --git a/vcl/source/treelist/svimpbox.cxx b/vcl/source/treelist/svimpbox.cxx
index eb69c9d5d295..689bce430dab 100644
--- a/vcl/source/treelist/svimpbox.cxx
+++ b/vcl/source/treelist/svimpbox.cxx
@@ -1894,7 +1894,7 @@ bool SvImpLBox::ButtonUpCheckCtrl( const MouseEvent& rMEvt )
 // ******* Control plus/minus button for expanding/collapsing
 
 // false == no expand/collapse button hit
-bool SvImpLBox::IsNodeButton( const Point& rPosPixel, SvTreeListEntry* pEntry ) const
+bool SvImpLBox::IsNodeButton( const Point& rPosPixel, const SvTreeListEntry* pEntry ) const
 {
     if( !pEntry->HasChildren() && !pEntry->HasChildrenOnDemand() )
         return false;
diff --git a/vcl/source/treelist/treelistbox.cxx b/vcl/source/treelist/treelistbox.cxx
index 05b3d9d2a891..b3f9506f5839 100644
--- a/vcl/source/treelist/treelistbox.cxx
+++ b/vcl/source/treelist/treelistbox.cxx
@@ -507,7 +507,7 @@ bool SvTreeListBox::CheckDragAndDropMode( SvTreeListBox const * pSource, sal_Int
 */
 TriState SvTreeListBox::NotifyMoving(
     SvTreeListEntry*  pTarget,       // D&D dropping position in GetModel()
-    SvTreeListEntry*  pEntry,        // entry that we want to move, from
+    const SvTreeListEntry*  pEntry,        // entry that we want to move, from
                                  // GetSourceListBox()->GetModel()
     SvTreeListEntry*& rpNewParent,   // new target parent
     sal_uLong&        rNewChildPos)  // position in childlist of target parent
@@ -541,7 +541,7 @@ TriState SvTreeListBox::NotifyMoving(
 
 TriState SvTreeListBox::NotifyCopying(
     SvTreeListEntry*  pTarget,       // D&D dropping position in GetModel()
-    SvTreeListEntry*  pEntry,        // entry that we want to move, from
+    const SvTreeListEntry*  pEntry,        // entry that we want to move, from
                                  // GetSourceListBox()->GetModel()
     SvTreeListEntry*& rpNewParent,   // new target parent
     sal_uLong&        rNewChildPos)  // position in childlist of target parent
@@ -1158,7 +1158,7 @@ void SvTreeListBox::StartDrag( sal_Int8, const Point& rPosPixel )
     xContainer->StartDrag(this, mnDragAction, GetDragFinishedHdl());
 }
 
-void SvTreeListBox::SetDragHelper(rtl::Reference<TransferDataContainer>& rHelper, sal_uInt8 eDNDConstants)
+void SvTreeListBox::SetDragHelper(const rtl::Reference<TransferDataContainer>& rHelper, sal_uInt8 eDNDConstants)
 {
     m_xTransferHelper = rHelper;
     mnDragAction = eDNDConstants;
@@ -2941,7 +2941,7 @@ tools::Rectangle SvTreeListBox::GetFocusRect(const SvTreeListEntry* pEntry, long
     return aRect;
 }
 
-sal_IntPtr SvTreeListBox::GetTabPos(const SvTreeListEntry* pEntry, SvLBoxTab* pTab)
+sal_IntPtr SvTreeListBox::GetTabPos(const SvTreeListEntry* pEntry, const SvLBoxTab* pTab)
 {
     assert(pTab);
     sal_IntPtr nPos = pTab->GetPos();
diff --git a/vcl/source/window/layout.cxx b/vcl/source/window/layout.cxx
index 9e4831789f8d..ea9a0bb7f064 100644
--- a/vcl/source/window/layout.cxx
+++ b/vcl/source/window/layout.cxx
@@ -793,7 +793,7 @@ bool sortButtons::operator()(const vcl::Window *pA, const vcl::Window *pB) const
     return getButtonPriority(pA->GetHelpId()) < getButtonPriority(pB->GetHelpId());
 }
 
-void sort_native_button_order(VclBox& rContainer)
+void sort_native_button_order(const VclBox& rContainer)
 {
     std::vector<vcl::Window*> aChilds;
     for (vcl::Window* pChild = rContainer.GetWindow(GetWindowType::FirstChild); pChild;
diff --git a/vcl/unx/generic/app/saldisp.cxx b/vcl/unx/generic/app/saldisp.cxx
index 1b029e031f64..29035742fd99 100644
--- a/vcl/unx/generic/app/saldisp.cxx
+++ b/vcl/unx/generic/app/saldisp.cxx
@@ -2044,7 +2044,7 @@ bool SalX11Display::Dispatch( XEvent *pEvent )
 }
 
 #ifdef DBG_UTIL
-void SalDisplay::DbgPrintDisplayEvent(const char *pComment, XEvent *pEvent) const
+void SalDisplay::DbgPrintDisplayEvent(const char *pComment, const XEvent *pEvent) const
 {
     static const char* const EventNames[] =
     {
diff --git a/vcl/unx/generic/glyphs/freetype_glyphcache.cxx b/vcl/unx/generic/glyphs/freetype_glyphcache.cxx
index 6d8fec490c11..9b3f8dc5c6f1 100644
--- a/vcl/unx/generic/glyphs/freetype_glyphcache.cxx
+++ b/vcl/unx/generic/glyphs/freetype_glyphcache.cxx
@@ -399,7 +399,7 @@ rtl::Reference<LogicalFontInstance> FreetypeFontFace::CreateFontInstance(const F
 
 // FreetypeFont
 
-FreetypeFont::FreetypeFont(FreetypeFontInstance& rFontInstance, std::shared_ptr<FreetypeFontInfo>& rFI)
+FreetypeFont::FreetypeFont(FreetypeFontInstance& rFontInstance, const std::shared_ptr<FreetypeFontInfo>& rFI)
 :   mrFontInstance(rFontInstance),
     mnCos( 0x10000),
     mnSin( 0 ),