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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_SW_INC_ACCMAP_HXX
+#define INCLUDED_SW_INC_ACCMAP_HXX
+
+#include <cppuhelper/weakref.hxx>
+#include <rtl/ref.hxx>
+#include <osl/mutex.hxx>
+#include <svx/IAccessibleViewForwarder.hxx>
+#include <svx/IAccessibleParent.hxx>
+
+#include <svx/AccessibleControlShape.hxx>
+#include <o3tl/typed_flags_set.hxx>
+#include <unotools/weakref.hxx>
+#include <vector>
+#include <memory>
+#include <o3tl/sorted_vector.hxx>
+
+class SwAccessibleParagraph;
+class SwViewShell;
+class SwFrame;
+class SwTextFrame;
+class SwPageFrame;
+class SwAccessibleContext;
+class SwAccessibleContextMap_Impl;
+class SwAccessibleEventList_Impl;
+class SwAccessibleEventMap_Impl;
+class SdrObject;
+namespace accessibility { class AccessibleShape; }
+class SwAccessibleShapeMap_Impl;
+struct SwAccessibleEvent_Impl;
+class SwAccessibleSelectedParas_Impl;
+class SwRect;
+class MapMode;
+class SwAccPreviewData;
+class SwFEShell;
+class Fraction;
+struct PreviewPage;
+namespace vcl { class Window; }
+namespace com::sun::star::accessibility { class XAccessible; }
+
+// The shape list is filled if an accessible shape is destroyed. It
+// simply keeps a reference to the accessible shape's XShape. These
+// references are destroyed within the EndAction when firing events.
+// There are two reason for this. First of all, a new accessible shape
+// for the XShape might be created soon. It's then cheaper if the XShape
+// still exists. The other reason are situations where an accessible shape
+// is destroyed within an SwFrameFormat::SwClientNotify. In this case, destroying
+// the XShape at the same time (indirectly by destroying the accessible
+// shape) leads to an assert, because a client of the Modify is destroyed
+// within a Modify call.
+using SwShapeList_Impl = std::vector<css::uno::Reference<css::drawing::XShape>>;
+
+enum class AccessibleStates
+{
+    NONE                   = 0x0000,
+    // real states for events
+    EDITABLE               = 0x0001,
+    OPAQUE                 = 0x0002,
+    // pseudo states for events
+    TEXT_ATTRIBUTE_CHANGED = 0x0200,
+    TEXT_SELECTION_CHANGED = 0x0100,
+    CARET                  = 0x0080,
+    RELATION_FROM          = 0x0040,
+    RELATION_TO            = 0x0020,
+};
+namespace o3tl
+{
+    template<> struct typed_flags<AccessibleStates> : is_typed_flags<AccessibleStates, 0x3e3> {};
+}
+
+class SwAccessibleMap final : public ::accessibility::IAccessibleViewForwarder,
+                        public ::accessibility::IAccessibleParent
+                , public std::enable_shared_from_this<SwAccessibleMap>
+{
+    ::osl::Mutex maEventMutex;
+    std::unique_ptr<SwAccessibleContextMap_Impl> mpFrameMap;
+    std::unique_ptr<SwAccessibleShapeMap_Impl> mpShapeMap;
+    SwShapeList_Impl mvShapes;
+    std::unique_ptr<SwAccessibleEventList_Impl> mpEvents;
+    std::unique_ptr<SwAccessibleEventMap_Impl> mpEventMap;
+
+    // Para Container for InvalidateCursorPosition
+    o3tl::sorted_vector<SwAccessibleParagraph*> m_setParaAdd;
+    o3tl::sorted_vector<SwAccessibleParagraph*> m_setParaRemove;
+
+    // #i27301 data structure to keep information about
+    // accessible paragraph, which have a selection.
+    std::unique_ptr<SwAccessibleSelectedParas_Impl> mpSelectedParas;
+    SwViewShell *mpVSh;
+    /// for page preview: store preview data, VisArea, and mapping of
+    /// preview-to-display coordinates
+    std::unique_ptr<SwAccPreviewData> mpPreview;
+
+    unotools::WeakReference< SwAccessibleContext > mxCursorContext;
+
+    bool mbShapeSelected;
+
+    void FireEvent( const SwAccessibleEvent_Impl& rEvent );
+
+    void AppendEvent( const SwAccessibleEvent_Impl& rEvent );
+
+    void InvalidateCursorPosition( const css::uno::Reference<css::accessibility::XAccessible>& rAcc );
+    void DoInvalidateShapeSelection(bool bInvalidateFocusMode = false);
+
+    void InvalidateShapeSelection();
+
+    //mpSelectedFrameMap contains the old selected objects.
+    std::unique_ptr<SwAccessibleContextMap_Impl> mpSelectedFrameMap;
+
+    OUString maDocName;
+
+    //InvalidateShapeInParaSelection() method is responsible for the updating the selected states of the objects.
+    void InvalidateShapeInParaSelection();
+
+    void InvalidateRelationSet_( const SwFrame* pFrame, bool bFrom );
+
+    css::uno::Reference<css::accessibility::XAccessible>
+            GetDocumentView_( bool bPagePreview );
+
+    /** method to build up a new data structure of the accessible paragraphs,
+        which have a selection
+
+        Important note: method has to used inside a mutual exclusive section
+    */
+    std::unique_ptr<SwAccessibleSelectedParas_Impl> BuildSelectedParas();
+
+public:
+
+    SwAccessibleMap( SwViewShell *pSh );
+    virtual ~SwAccessibleMap() override;
+
+    css::uno::Reference<css::accessibility::XAccessible> GetDocumentView();
+
+    css::uno::Reference<css::accessibility::XAccessible> GetDocumentPreview(
+                            const std::vector<std::unique_ptr<PreviewPage>>& _rPreviewPages,
+                            const Fraction&  _rScale,
+                            const SwPageFrame* _pSelectedPageFrame,
+                            const Size&      _rPreviewWinSize );
+
+    ::rtl::Reference < SwAccessibleContext > GetContextImpl(
+                                                 const SwFrame *pFrame,
+                                                bool bCreate = true );
+    css::uno::Reference<css::accessibility::XAccessible> GetContext(
+                                                 const SwFrame *pFrame,
+                                                bool bCreate = true );
+
+    ::rtl::Reference < ::accessibility::AccessibleShape > GetContextImpl(
+                                        const SdrObject *pObj,
+                                        SwAccessibleContext *pParentImpl,
+                                        bool bCreate = true );
+    css::uno::Reference<css::accessibility::XAccessible> GetContext(
+                                        const SdrObject *pObj,
+                                        SwAccessibleContext *pParentImpl,
+                                        bool bCreate = true );
+
+    SwViewShell* GetShell() const
+    {
+        return mpVSh;
+    }
+    static bool IsInSameLevel(const SdrObject* pObj, const SwFEShell* pFESh);
+    void AddShapeContext(const SdrObject *pObj,
+                             rtl::Reference < ::accessibility::AccessibleShape > const & xAccShape);
+
+    void AddGroupContext(const SdrObject *pParentObj,
+                    css::uno::Reference < css::accessibility::XAccessible > const & xAccParent);
+    void RemoveGroupContext(const SdrObject *pParentObj);
+
+    const SwRect& GetVisArea() const;
+
+    /** get size of a dedicated preview page
+
+        @param _nPreviewPageNum
+        input parameter - physical page number of page visible in the page preview
+
+        @return an object of class <Size>
+    */
+    Size GetPreviewPageSize( sal_uInt16 _nPreviewPageNum ) const;
+
+    void RemoveContext( const SwFrame *pFrame );
+    void RemoveContext( const SdrObject *pObj );
+
+    // Dispose frame and its children if bRecursive is set
+    void A11yDispose( const SwFrame* pFrame,
+                      const SdrObject* pObj,
+                      vcl::Window* pWindow,
+                      bool bRecursive = false,
+                      bool bCanSkipInvisible = true );
+
+    void InvalidatePosOrSize( const SwFrame* pFrame,
+                              const SdrObject* pObj,
+                              vcl::Window* pWindow,
+                              const SwRect& rOldFrame );
+
+    void InvalidateContent( const SwFrame *pFrame );
+
+    void InvalidateAttr( const SwTextFrame& rTextFrame );
+
+    void InvalidateCursorPosition( const SwFrame *pFrame );
+    void InvalidateFocus();
+    void SetCursorContext(
+        const ::rtl::Reference < SwAccessibleContext >& rCursorContext );
+
+    // Invalidate state of whole tree. If an action is open, this call
+    // is processed when the last action ends.
+    void InvalidateEditableStates( const SwFrame* _pFrame );
+
+    void InvalidateRelationSet( const SwFrame* pMaster, const SwFrame* pFollow );
+
+    /** invalidation CONTENT_FLOWS_FROM/_TO relation of a paragraph
+
+        @param _rTextFrame
+        input parameter - reference to paragraph, whose CONTENT_FLOWS_FROM/_TO
+        has to be invalidated.
+
+        @param _bFrom
+        input parameter - boolean indicating, if relation CONTENT_FLOWS_FROM
+        (value <true>) or CONTENT_FLOWS_TO (value <false>) has to be invalidated.
+    */
+    void InvalidateParaFlowRelation( const SwTextFrame& _rTextFrame,
+                                     const bool _bFrom );
+
+    /** invalidation of text selection of a paragraph */
+    void InvalidateParaTextSelection( const SwTextFrame& _rTextFrame );
+
+    /** invalidation of text selection of all paragraphs */
+    void InvalidateTextSelectionOfAllParas();
+
+    sal_Int32 GetChildIndex( const SwFrame& rParentFrame,
+                             vcl::Window& rChild ) const;
+
+    // update preview data (and fire events if necessary)
+    void UpdatePreview( const std::vector<std::unique_ptr<PreviewPage>>& _rPreviewPages,
+                        const Fraction&  _rScale,
+                        const SwPageFrame* _pSelectedPageFrame,
+                        const Size&      _rPreviewWinSize );
+
+    void InvalidatePreviewSelection( sal_uInt16 nSelPage );
+    bool IsPageSelected( const SwPageFrame *pPageFrame ) const;
+
+    void FireEvents();
+
+    const OUString& GetDocName() const { return maDocName; }
+
+    // IAccessibleViewForwarder
+
+    virtual tools::Rectangle GetVisibleArea() const override;
+    virtual Point LogicToPixel (const Point& rPoint) const override;
+    virtual Size LogicToPixel (const Size& rSize) const override;
+
+    // IAccessibleParent
+    virtual bool ReplaceChild (
+        ::accessibility::AccessibleShape* pCurrentChild,
+        const css::uno::Reference< css::drawing::XShape >& _rxShape,
+        const tools::Long _nIndex,
+        const ::accessibility::AccessibleShapeTreeInfo& _rShapeTreeInfo
+    ) override;
+    virtual ::accessibility::AccessibleControlShape* GetAccControlShapeFromModel
+        (css::beans::XPropertySet* pSet) override;
+    virtual css::uno::Reference< css::accessibility::XAccessible >   GetAccessibleCaption (
+        const css::uno::Reference< css::drawing::XShape > & xShape) override;
+
+    // additional Core/Pixel conversions for internal use; also works
+    // for preview
+    Point PixelToCore (const Point& rPoint) const;
+    tools::Rectangle CoreToPixel (const SwRect& rRect) const;
+
+    // is there a known accessibility impl cached for the frame
+    bool Contains(const SwFrame *pFrame) const;
+
+private:
+    /** get mapping mode for LogicToPixel and PixelToLogic conversions
+
+        Replacement method <PreviewAdjust(..)> by new method <GetMapMode>.
+        Method returns mapping mode of current output device and adjusts it,
+        if the shell is in page/print preview.
+        Necessary, because <PreviewAdjust(..)> changes mapping mode at current
+        output device for mapping logic document positions to page preview window
+        positions and vice versa and doesn't take care to recover its changes.
+
+        @param _rPoint
+        input parameter - constant reference to point to determine the mapping
+        mode adjustments for page/print preview.
+
+        @param _orMapMode
+        output parameter - reference to the mapping mode, which is determined
+        by the method
+    */
+    void GetMapMode( const Point& _rPoint,
+                     MapMode&     _orMapMode ) const;
+public:
+    virtual bool IsDocumentSelAll() override;
+};
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */