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diff --git a/sdext/source/presenter/PresenterWindowManager.hxx b/sdext/source/presenter/PresenterWindowManager.hxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * 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 INCLUDED_SDEXT_SOURCE_PRESENTER_PRESENTERWINDOWMANAGER_HXX
+#define INCLUDED_SDEXT_SOURCE_PRESENTER_PRESENTERWINDOWMANAGER_HXX
+
+#include "PresenterPaneContainer.hxx"
+#include "PresenterTheme.hxx"
+#include <com/sun/star/awt/Size.hpp>
+#include <com/sun/star/awt/XFocusListener.hpp>
+#include <com/sun/star/awt/XPaintListener.hpp>
+#include <com/sun/star/awt/XWindow.hpp>
+#include <com/sun/star/awt/XWindowListener.hpp>
+#include <com/sun/star/document/XEventListener.hpp>
+#include <com/sun/star/drawing/framework/XPane.hpp>
+#include <com/sun/star/rendering/XBitmap.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <cppuhelper/basemutex.hxx>
+#include <cppuhelper/compbase.hxx>
+#include <rtl/ref.hxx>
+#include <memory>
+
+namespace sdext::presenter {
+
+class PresenterController;
+class PresenterPaneBorderPainter;
+class PresenterTheme;
+
+typedef ::cppu::WeakComponentImplHelper<
+    css::awt::XWindowListener,
+    css::awt::XPaintListener,
+    css::awt::XMouseListener,
+    css::awt::XFocusListener
+> PresenterWindowManagerInterfaceBase;
+
+/** A simple manager of the positions of the panes of the presenter screen.
+    Uses relative coordinates of the four sides of each pane.  Allows panes
+    to be moved or resized with the mouse.
+*/
+class PresenterWindowManager
+    : protected ::cppu::BaseMutex,
+      public PresenterWindowManagerInterfaceBase
+{
+public:
+    PresenterWindowManager (
+        const css::uno::Reference<css::uno::XComponentContext>& rxContext,
+        const ::rtl::Reference<PresenterPaneContainer>& rpPaneContainer,
+        const ::rtl::Reference<PresenterController>& rpPresenterController);
+    virtual ~PresenterWindowManager() override;
+    PresenterWindowManager(const PresenterWindowManager&) = delete;
+    PresenterWindowManager& operator=(const PresenterWindowManager&) = delete;
+
+    void SAL_CALL disposing() override;
+
+    void SetParentPane (const css::uno::Reference<css::drawing::framework::XPane>& rxPane);
+    void SetTheme (const std::shared_ptr<PresenterTheme>& rpTheme);
+    void NotifyViewCreation (const css::uno::Reference<css::drawing::framework::XView>& rxView);
+    void SetPanePosSizeAbsolute (
+        const OUString& rsPaneURL,
+        const double nX,
+        const double nY,
+        const double nWidth,
+        const double nHeight);
+    void SetPaneBorderPainter (const ::rtl::Reference<PresenterPaneBorderPainter>& rPainter);
+    void Update();
+    void Layout();
+
+    void SetSlideSorterState (bool bIsActive);
+    void SetHelpViewState (bool bIsActive);
+
+    enum LayoutMode { LM_Standard, LM_Notes, LM_Generic };
+private:
+    void SetLayoutMode (const LayoutMode eMode);
+
+public:
+    enum ViewMode { VM_Standard, VM_Notes, VM_SlideOverview, VM_Help };
+    /** The high-level method to switch the view mode.  Use this instead of
+        SetLayoutMode and Set(Help|SlideSorter)State when possible.
+    */
+    void SetViewMode (const ViewMode eMode);
+
+    ViewMode GetViewMode() const;
+
+    /** Restore the layout mode (or slide sorter state) from the
+        configuration.
+    */
+    void RestoreViewMode();
+
+    void AddLayoutListener (
+        const css::uno::Reference<css::document::XEventListener>& rxListener);
+    void RemoveLayoutListener (
+        const css::uno::Reference<css::document::XEventListener>& rxListener);
+
+    // XWindowListener
+
+    virtual void SAL_CALL windowResized (const css::awt::WindowEvent& rEvent) override;
+
+    virtual void SAL_CALL windowMoved (const css::awt::WindowEvent& rEvent) override;
+
+    virtual void SAL_CALL windowShown (const css::lang::EventObject& rEvent) override;
+
+    virtual void SAL_CALL windowHidden (const css::lang::EventObject& rEvent) override;
+
+    // XPaintListener
+
+    virtual void SAL_CALL windowPaint (const css::awt::PaintEvent& rEvent) override;
+
+    // XMouseListener
+
+    virtual void SAL_CALL mousePressed (const css::awt::MouseEvent& rEvent) override;
+
+    virtual void SAL_CALL mouseReleased (const css::awt::MouseEvent& rEvent) override;
+
+    virtual void SAL_CALL mouseEntered (const css::awt::MouseEvent& rEvent) override;
+
+    virtual void SAL_CALL mouseExited (const css::awt::MouseEvent& rEvent) override;
+
+    // XFocusListener
+
+    virtual void SAL_CALL focusGained (const css::awt::FocusEvent& rEvent) override;
+
+    virtual void SAL_CALL focusLost (const css::awt::FocusEvent& rEvent) override;
+
+    // XEventListener
+
+    virtual void SAL_CALL disposing (
+        const css::lang::EventObject& rEvent) override;
+
+private:
+    css::uno::Reference<css::uno::XComponentContext> mxComponentContext;
+    ::rtl::Reference<PresenterController> mpPresenterController;
+    css::uno::Reference<css::awt::XWindow> mxParentWindow;
+    css::uno::Reference<css::rendering::XCanvas> mxParentCanvas;
+    css::uno::Reference<css::uno::XInterface> mxPaneBorderManager;
+    ::rtl::Reference<PresenterPaneBorderPainter> mpPaneBorderPainter;
+    ::rtl::Reference<PresenterPaneContainer> mpPaneContainer;
+    bool mbIsLayoutPending;
+    /** This flag is set to <TRUE/> while the Layout() method is being
+        executed.  Prevents windowMoved() and windowResized() from changing
+        the window sizes.
+    */
+    bool mbIsLayouting;
+    std::shared_ptr<PresenterTheme> mpTheme;
+    SharedBitmapDescriptor mpBackgroundBitmap;
+    css::uno::Reference<css::rendering::XBitmap> mxScaledBackgroundBitmap;
+    css::uno::Reference<css::rendering::XPolyPolygon2D> mxClipPolygon;
+    LayoutMode meLayoutMode;
+    bool mbIsSlideSorterActive;
+    bool mbIsHelpViewActive;
+    typedef ::std::vector<css::uno::Reference<css::document::XEventListener> >
+        LayoutListenerContainer;
+    LayoutListenerContainer maLayoutListeners;
+    bool mbIsMouseClickPending;
+
+    void PaintChildren (const css::awt::PaintEvent& rEvent) const;
+    void UpdateWindowSize (const css::uno::Reference<css::awt::XWindow>& rxBorderWindow);
+    void PaintBackground (const css::awt::Rectangle& rUpdateBox);
+    void ProvideBackgroundBitmap();
+    css::uno::Reference<css::rendering::XPolyPolygon2D> CreateClipPolyPolygon() const;
+
+    void StoreViewMode (const ViewMode eViewMode);
+
+    void LayoutStandardMode();
+    void LayoutNotesMode();
+    void LayoutSlideSorterMode();
+    void LayoutHelpMode();
+
+    /** Layout the tool bar and return its outer bounding box.
+    */
+    css::geometry::RealRectangle2D LayoutToolBar();
+
+    css::awt::Size CalculatePaneSize (
+        const double nOuterWidth,
+        const OUString& rsPaneURL);
+
+    /** Notify changes of the layout mode and of the slide sorter state.
+    */
+    void NotifyLayoutModeChange();
+
+    void NotifyDisposing();
+
+    /// @throws css::lang::DisposedException
+    void ThrowIfDisposed() const;
+};
+
+}
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */