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diff --git a/include/sfx2/sidebar/Theme.hxx b/include/sfx2/sidebar/Theme.hxx
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+++ b/include/sfx2/sidebar/Theme.hxx
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+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+#ifndef SFX_SIDEBAR_THEME_HXX
+#define SFX_SIDEBAR_THEME_HXX
+
+#include "sfx2/dllapi.h"
+
+#include <tools/color.hxx>
+#include <vcl/image.hxx>
+#include <cppuhelper/compbase2.hxx>
+#include <cppuhelper/basemutex.hxx>
+#include <tools/gen.hxx>
+#include <rtl/ref.hxx>
+#include <vcl/wall.hxx>
+
+#include <com/sun/star/beans/XPropertySet.hpp>
+
+#include <boost/unordered_map.hpp>
+#include <map>
+#include <boost/optional.hpp>
+
+
+class SvBorder;
+
+namespace css = ::com::sun::star;
+namespace cssu = ::com::sun::star::uno;
+
+
+namespace sfx2 { namespace sidebar {
+
+
+namespace
+{
+    typedef ::cppu::WeakComponentImplHelper2 <
+        css::beans::XPropertySet,
+        css::beans::XPropertySetInfo
+        > ThemeInterfaceBase;
+}
+
+class Paint;
+
+/** Simple collection of colors, gradients, fonts that define the
+    look of the sidebar and its controls.
+*/
+class SFX2_DLLPUBLIC Theme
+    : private ::boost::noncopyable,
+      private ::cppu::BaseMutex,
+      public ThemeInterfaceBase
+{
+public:
+    enum ThemeItem
+    {
+        __Begin,
+        __Pre_Image = __Begin,
+
+        __AnyItem = __Pre_Image,
+
+        Image_Grip,
+        Image_Expand,
+        Image_Collapse,
+        Image_TabBarMenu,
+        Image_PanelMenu,
+        Image_ToolBoxItemSeparator,
+        Image_Closer,
+
+        __Image_Color,
+
+        Color_DeckTitleFont,
+        Color_PanelTitleFont,
+        Color_TabMenuSeparator,
+        Color_TabItemBorder,
+        Color_DropDownBorder,
+        Color_Highlight,
+        Color_HighlightText,
+
+        __Color_Paint,
+
+        Paint_DeckBackground,
+        Paint_DeckTitleBarBackground,
+        Paint_PanelBackground,
+        Paint_PanelTitleBarBackground,
+        Paint_TabBarBackground,
+        Paint_TabItemBackgroundNormal,
+        Paint_TabItemBackgroundHighlight,
+        Paint_HorizontalBorder,
+        Paint_VerticalBorder,
+        Paint_ToolBoxBackground,
+        Paint_ToolBoxBorderTopLeft,
+        Paint_ToolBoxBorderCenterCorners,
+        Paint_ToolBoxBorderBottomRight,
+        Paint_DropDownBackground,
+
+        __Paint_Int,
+
+        Int_DeckTitleBarHeight,
+        Int_DeckBorderSize,
+        Int_DeckSeparatorHeight,
+        Int_PanelTitleBarHeight,
+        Int_TabMenuPadding,
+        Int_TabMenuSeparatorPadding,
+        Int_TabItemWidth,
+        Int_TabItemHeight,
+        Int_DeckLeftPadding,
+        Int_DeckTopPadding,
+        Int_DeckRightPadding,
+        Int_DeckBottomPadding,
+        Int_TabBarLeftPadding,
+        Int_TabBarTopPadding,
+        Int_TabBarRightPadding,
+        Int_TabBarBottomPadding,
+        Int_ButtonCornerRadius,
+
+        __Int_Bool,
+
+        Bool_UseSymphonyIcons,
+        Bool_UseSystemColors,
+        Bool_UseToolBoxItemSeparator,
+        Bool_IsHighContrastModeActive,
+
+        __Bool_Rect,
+
+        Rect_ToolBoxPadding,
+        Rect_ToolBoxBorder,
+
+        __Post_Rect,
+        __End=__Post_Rect
+    };
+
+    static Image GetImage (const ThemeItem eItem);
+    static Color GetColor (const ThemeItem eItem);
+    static const Paint& GetPaint (const ThemeItem eItem);
+    static const Wallpaper GetWallpaper (const ThemeItem eItem);
+    static sal_Int32 GetInteger (const ThemeItem eItem);
+    static bool GetBoolean (const ThemeItem eItem);
+    static Rectangle GetRectangle (const ThemeItem eItem);
+
+    static bool IsHighContrastMode (void);
+
+    static void HandleDataChange (void);
+
+    Theme (void);
+    virtual ~Theme (void);
+
+    virtual void SAL_CALL disposing (void);
+
+    static cssu::Reference<css::beans::XPropertySet> GetPropertySet (void);
+
+    // beans::XPropertySet
+    virtual cssu::Reference<css::beans::XPropertySetInfo> SAL_CALL getPropertySetInfo (void)
+        throw(cssu::RuntimeException);
+    virtual void SAL_CALL setPropertyValue (
+        const ::rtl::OUString& rsPropertyName,
+        const cssu::Any& rValue)
+        throw(cssu::RuntimeException);
+    virtual cssu::Any SAL_CALL getPropertyValue (
+        const ::rtl::OUString& rsPropertyName)
+        throw(css::beans::UnknownPropertyException,
+            css::lang::WrappedTargetException,
+            cssu::RuntimeException);
+    virtual void SAL_CALL addPropertyChangeListener(
+        const ::rtl::OUString& rsPropertyName,
+        const cssu::Reference<css::beans::XPropertyChangeListener>& rxListener)
+        throw(css::beans::UnknownPropertyException,
+            css::lang::WrappedTargetException,
+            cssu::RuntimeException);
+    virtual void SAL_CALL removePropertyChangeListener(
+        const ::rtl::OUString& rsPropertyName,
+        const cssu::Reference<css::beans::XPropertyChangeListener>& rxListener)
+        throw(css::beans::UnknownPropertyException,
+            css::lang::WrappedTargetException,
+            cssu::RuntimeException);
+    virtual void SAL_CALL addVetoableChangeListener(
+        const ::rtl::OUString& rsPropertyName,
+        const cssu::Reference<css::beans::XVetoableChangeListener>& rxListener)
+        throw(css::beans::UnknownPropertyException,
+            css::lang::WrappedTargetException,
+            cssu::RuntimeException);
+    virtual void SAL_CALL removeVetoableChangeListener(
+        const ::rtl::OUString& rsPropertyName,
+        const cssu::Reference<css::beans::XVetoableChangeListener>& rxListener)
+        throw(css::beans::UnknownPropertyException,
+            css::lang::WrappedTargetException,
+            cssu::RuntimeException);
+
+    // beans::XPropertySetInfo
+    virtual cssu::Sequence<css::beans::Property> SAL_CALL getProperties (void)
+        throw(cssu::RuntimeException);
+    virtual css::beans::Property SAL_CALL getPropertyByName (const ::rtl::OUString& rsName)
+        throw(css::beans::UnknownPropertyException,
+            cssu::RuntimeException);
+    virtual sal_Bool SAL_CALL hasPropertyByName (const ::rtl::OUString& rsName)
+        throw(cssu::RuntimeException);
+
+private:
+    static ::rtl::Reference<Theme> mpInstance;
+    static Theme& GetCurrentTheme (void);
+
+    ::std::vector<Image> maImages;
+    ::std::vector<Color> maColors;
+    ::std::vector<Paint> maPaints;
+    ::std::vector<sal_Int32> maIntegers;
+    ::std::vector<bool> maBooleans;
+    ::std::vector<Rectangle> maRectangles;
+    bool mbIsHighContrastMode;
+    bool mbIsHighContrastModeSetManually;
+
+    typedef ::boost::unordered_map<rtl::OUString,ThemeItem, rtl::OUStringHash> PropertyNameToIdMap;
+    PropertyNameToIdMap maPropertyNameToIdMap;
+    typedef ::std::vector<rtl::OUString> PropertyIdToNameMap;
+    PropertyIdToNameMap maPropertyIdToNameMap;
+    typedef ::std::vector<cssu::Any> RawValueContainer;
+    RawValueContainer maRawValues;
+
+    typedef ::std::vector<cssu::Reference<css::beans::XPropertyChangeListener> > ChangeListenerContainer;
+    typedef ::std::map<ThemeItem,ChangeListenerContainer> ChangeListeners;
+    ChangeListeners maChangeListeners;
+    typedef ::std::vector<cssu::Reference<css::beans::XVetoableChangeListener> > VetoableListenerContainer;
+    typedef ::std::map<ThemeItem,VetoableListenerContainer> VetoableListeners;
+    VetoableListeners maVetoableListeners;
+
+    enum PropertyType
+    {
+        PT_Image,
+        PT_Color,
+        PT_Paint,
+        PT_Integer,
+        PT_Boolean,
+        PT_Rectangle,
+        PT_Invalid
+    };
+
+    void SetupPropertyMaps (void);
+    void InitializeTheme (void);
+    void UpdateTheme (void);
+    static PropertyType GetPropertyType (const ThemeItem eItem);
+    static cssu::Type GetCppuType (const PropertyType eType);
+    static sal_Int32 GetIndex (
+        const ThemeItem eItem,
+        const PropertyType eType);
+
+    VetoableListenerContainer* GetVetoableListeners (
+        const ThemeItem eItem,
+        const bool bCreate);
+    ChangeListenerContainer* GetChangeListeners (
+        const ThemeItem eItem,
+        const bool bCreate);
+    bool DoVetoableListenersVeto (
+        const VetoableListenerContainer* pListeners,
+        const css::beans::PropertyChangeEvent& rEvent) const;
+    void BroadcastPropertyChange (
+        const ChangeListenerContainer* pListeners,
+        const css::beans::PropertyChangeEvent& rEvent) const;
+    void ProcessNewValue (
+        const cssu::Any& rValue,
+        const ThemeItem eItem,
+        const PropertyType eType);
+};
+
+
+
+} } // end of namespace sfx2::sidebar
+
+#endif