/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

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 *   Licensed to the Apache Software Foundation (ASF) under one or more

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#pragma once

#include <com/sun/star/accessibility/AccessibleScrollType.hpp>

#include <com/sun/star/accessibility/TextSegment.hpp>

#include <com/sun/star/accessibility/XAccessibleSelection.hpp>

#include <com/sun/star/accessibility/XAccessibleGroupPosition.hpp>

#include <com/sun/star/accessibility/XAccessibleHypertext.hpp>

#include <com/sun/star/awt/Point.hpp>

#include <com/sun/star/awt/Rectangle.hpp>

#include <com/sun/star/awt/Size.hpp>

#include <com/sun/star/document/XShapeEventListener.hpp>

#include <com/sun/star/lang/EventObject.hpp>

#include <com/sun/star/uno/Any.hxx>

#include <com/sun/star/uno/Reference.hxx>

#include <com/sun/star/uno/Sequence.hxx>

#include <com/sun/star/uno/Type.hxx>

#include <com/sun/star/lang/XUnoTunnel.hpp>

#include <comphelper/servicehelper.hxx>

#include <editeng/AccessibleContextBase.hxx>

#include <rtl/ustring.hxx>

#include <sal/types.h>

#include <svx/AccessibleShapeTreeInfo.hxx>

#include <svx/IAccessibleViewForwarderListener.hxx>

#include <svx/svxdllapi.h>

#include <memory>

namespace com::sun::star {

    namespace drawing { class XShape; }

}

class SdrObject;

namespace accessibility {

class AccessibleShapeInfo;

class AccessibleTextHelper;

class ChildrenManager;

class IAccessibleParent;

/** This base class provides a base implementation for all shapes.

    <p>The children of a shape can stem from two sources which, in case of

    SVX and SD shapes, are mutually exclusive.  This implementation,

    however, handles both simultaneously to cope with future extensions or

    shapes from other projects.

    <ul>

        <li>If this shape is a group shape, i.e. a

        SvxShapeGroup or a <type>Svx3DSceneObject</type>, it

        can have nested shapes.</li>

        <li>If this shape is a descendant from SvxShapeText

        then the text paragraphs are its children.</li>

    </ul>

    </p>

    <p>Accessible shapes do not listen for disposing() calls of the UNO

    shapes they make accessible.  This is the task of their owner, usually a

    container, who can then call dispose() at the accessible object.</p>

*/

class SVX_DLLPUBLIC AccessibleShape

    : public cppu::ImplInheritanceHelper<

          AccessibleContextBase, css::accessibility::XAccessibleSelection,

          css::accessibility::XAccessibleGroupPosition, css::accessibility::XAccessibleHypertext,

          css::document::XShapeEventListener, css::lang::XUnoTunnel>,

      public IAccessibleViewForwarderListener

{

public:

    /** Create a new accessible object that makes the given shape accessible.

        @param rShapeInfo

            This object contains all information specific to the new

            accessible shape.  That are e.g. the shape to be made accessible

            and the accessible object that will become the parent of the new

            object.

        @param rShapeTreeInfo

            Bundle of information passed to this shape and all of its descendants.

        @attention

            Always call the <member>init</member> method after creating a

            new accessible shape.  This is one way to overcome the potential

            problem of registering the new object with e.g. event

            broadcasters.  That would delete the new object if a broadcaster

            would not keep a strong reference to the new object.

    */

    AccessibleShape (

        const AccessibleShapeInfo& rShapeInfo,

        const AccessibleShapeTreeInfo& rShapeTreeInfo);

     //Solution: Overwrite the object's current name.

    virtual OUString SAL_CALL    getAccessibleName() override;

    virtual OUString SAL_CALL    getAccessibleDescription() override;

    virtual css::uno::Reference< css::accessibility::XAccessibleRelationSet> SAL_CALL getAccessibleRelationSet() override;

//=====  XAccessibleSelection  ============================================

    virtual void SAL_CALL selectAccessibleChild(

        sal_Int64 nChildIndex ) override;

    virtual sal_Bool SAL_CALL isAccessibleChildSelected(

        sal_Int64 nChildIndex ) override;

    virtual void SAL_CALL clearAccessibleSelection(  ) override;

    virtual void SAL_CALL selectAllAccessibleChildren(  ) override;

    virtual sal_Int64 SAL_CALL getSelectedAccessibleChildCount(  ) override;

    virtual css::uno::Reference< css::accessibility::XAccessible > SAL_CALL getSelectedAccessibleChild(

        sal_Int64 nSelectedChildIndex ) override;

    virtual void SAL_CALL deselectAccessibleChild(

        sal_Int64 nSelectedChildIndex ) override;

    /// Return this object's role.

    virtual sal_Int16 SAL_CALL getAccessibleRole() override;

    //=====  XAccessibleGroupPosition  =========================================

    virtual css::uno::Sequence< sal_Int32 > SAL_CALL

        getGroupPosition( const css::uno::Any& rAny ) override;

    virtual OUString SAL_CALL getObjectLink( const css::uno::Any& accoject ) override;

    /** The destructor releases its children manager and text engine if

        still existent.  These are responsible to send appropriate events.

    */

    virtual ~AccessibleShape() override;

    /** Initialize a new shape.  See the documentation of the constructor

        for the reason of this method's existence.

    */

    virtual void Init();

    /** Set the specified state.  If the state is <const>FOCUSED</const>

        then, additionally to the inherited functionality, the focus

        listeners registered with the XAccessibleComponent

        interface are called (if that state really changes).

        @param aState

            The state to turn on.

        @return

            The returned flag indicates whether the specified state has been

            changed (<TRUE/>), i.e. it has formerly not been set.

    */

    virtual bool SetState (sal_Int64 aState) override;

    /** Reset the specified state.  If the state is <const>FOCUSED</const>

        then, additionally to the inherited functionality, the focus

        listeners registered with the XAccessibleComponent

        interface are called (if that state really changes).

        @param aState

            The state to turn off.

        @return

            The returned flag indicates whether the specified state has been

            changed (<TRUE/>), i.e. it has formerly been set.

    */

    virtual bool ResetState (sal_Int64 aState) override;

    /** Return the state of the specified state.  Take the

        <const>FOCUSED</const> state from the accessible edit engine.

        @param aState

            The state for which to return its value.

        @return

            A value of <TRUE/> indicates that the state is set.  A <FALSE/>

            value indicates an unset state or the inability to access the

            entity that manages the state set.

    */

    bool GetState (sal_Int64 aState);

    //=====  XAccessibleContext  ==============================================

    /// Return the number of currently visible children.

    virtual sal_Int64 SAL_CALL

        getAccessibleChildCount() override;

    /** Return the specified child.

        @param nIndex

            Index of the requested child.

        @return

            Reference of the requested child which is the accessible object

            of a visible shape.

        @throws IndexOutOfBoundsException

            Throws an exception if the index is not valid.

    */

    virtual css::uno::Reference<

            css::accessibility::XAccessible> SAL_CALL

        getAccessibleChild (sal_Int64 nIndex) override;

    /// Return the set of current states.

    virtual sal_Int64 SAL_CALL

        getAccessibleStateSet() override;

    /// Return this objects index among the parents children.

    virtual sal_Int64 SAL_CALL

        getAccessibleIndexInParent() override;

    // OAccessible

    virtual css::awt::Rectangle implGetBounds() override;

    virtual std::unordered_map<OUString, OUString> implGetExtendedAttributes() override;

    //=====  XAccessibleComponent  ============================================

    virtual css::uno::Reference<

        css::accessibility::XAccessible > SAL_CALL

        getAccessibleAtPoint (const css::awt::Point& aPoint) override;

    virtual sal_Int32 SAL_CALL getForeground() override;

    virtual sal_Int32 SAL_CALL getBackground() override;

    //=====  XAccessibleEventBroadcaster  =====================================

    /** This call is forwarded to a) the base class and b) to the

        accessible edit engine if it is present.

        @param rxListener

            This listener is informed about accessibility events.

    */

    virtual void SAL_CALL

        addAccessibleEventListener (

            const css::uno::Reference<

            css::accessibility::XAccessibleEventListener >& rxListener) override;

    /** This call is forwarded to a) the base class and b) to the

        accessible edit engine if it is present.

        @param rxListener

            This listener will not be informed about accessibility events

            anymore.

    */

    virtual void SAL_CALL

        removeAccessibleEventListener (

            const css::uno::Reference<

            css::accessibility::XAccessibleEventListener >& rxListener) override;

    //=====  XTypeProvider  ===================================================

    virtual css::uno::Sequence< css::uno::Type> SAL_CALL

        getTypes() override;

    //=====  IAccessibleViewForwarderListener  ================================

    virtual void ViewForwarderChanged() override;

    /** Listen for disposing events of the model.  The accessible shape

        remains functional when this happens.

    */

    void disposing (const css::lang::EventObject& Source);

    //=====  document::XShapeEventListener  ========================================

    virtual void SAL_CALL

        notifyShapeEvent (const css::document::EventObject& rEventObject) override;

    //===== XUnoTunnel ========================================================

    UNO3_GETIMPLEMENTATION_DECL(AccessibleShape)

    //===== XAccessibleHypertext ========================================================

    virtual sal_Int32 SAL_CALL getHyperLinkCount() override;

    virtual css::uno::Reference< css::accessibility::XAccessibleHyperlink >

        SAL_CALL getHyperLink( sal_Int32 nLinkIndex ) override;

    virtual sal_Int32 SAL_CALL getHyperLinkIndex( sal_Int32 nCharIndex ) override;

    //=====  XAccessibleText  ==================================================

        virtual sal_Int32 SAL_CALL getCaretPosition(  ) override;

        virtual sal_Bool SAL_CALL setCaretPosition( sal_Int32 nIndex ) override;

        virtual sal_Unicode SAL_CALL getCharacter( sal_Int32 nIndex ) override;//Shen Zhen Jie changed sal_Unicode to sal_uInt32; change back to sal_Unicode

        virtual css::uno::Sequence< css::beans::PropertyValue > SAL_CALL getCharacterAttributes( sal_Int32 nIndex, const css::uno::Sequence< OUString >& aRequestedAttributes ) override;

        virtual css::awt::Rectangle SAL_CALL getCharacterBounds( sal_Int32 nIndex ) override;

        virtual sal_Int32 SAL_CALL getCharacterCount(  ) override;

        virtual sal_Int32 SAL_CALL getIndexAtPoint( const css::awt::Point& aPoint ) override;

        virtual OUString SAL_CALL getSelectedText(  ) override;

        virtual sal_Int32 SAL_CALL getSelectionStart(  ) override;

        virtual sal_Int32 SAL_CALL getSelectionEnd(  ) override;

        virtual sal_Bool SAL_CALL setSelection( sal_Int32 nStartIndex, sal_Int32 nEndIndex ) override;

        virtual OUString SAL_CALL getText(  ) override;

        virtual OUString SAL_CALL getTextRange( sal_Int32 nStartIndex, sal_Int32 nEndIndex ) override;

        virtual css::accessibility::TextSegment SAL_CALL getTextAtIndex( sal_Int32 nIndex, sal_Int16 aTextType ) override;

        virtual css::accessibility::TextSegment SAL_CALL getTextBeforeIndex( sal_Int32 nIndex, sal_Int16 aTextType ) override;

        virtual css::accessibility::TextSegment SAL_CALL getTextBehindIndex( sal_Int32 nIndex, sal_Int16 aTextType ) override;

        virtual sal_Bool SAL_CALL copyText( sal_Int32 nStartIndex, sal_Int32 nEndIndex ) override;

        virtual sal_Bool SAL_CALL scrollSubstringTo( sal_Int32 nStartIndex, sal_Int32 nEndIndex, css::accessibility::AccessibleScrollType aScrollType) override;

    //===== Misc ========================================================

    const css::uno::Reference< css::drawing::XShape >&

        GetXShape() const { return mxShape; }

    /** set the index _nIndex at the accessible shape

        @param  _nIndex

            The new index in parent.

    */

    void setIndexInParent(sal_Int32 _nIndex) { m_nIndexInParent = _nIndex; }

protected:

    /// Children manager. May be empty if there are no children.

    std::unique_ptr<ChildrenManager> mpChildrenManager;

    /// Reference to the actual shape.

    css::uno::Reference<

        css::drawing::XShape> mxShape;

    /** Bundle of information passed to all shapes in a document tree.

    */

    AccessibleShapeTreeInfo maShapeTreeInfo;

    /** the index in parent.

    */

    sal_Int32 m_nIndexInParent;

    /** The accessible text engine.  May be NULL if it can not be created.

    */

    std::unique_ptr<AccessibleTextHelper> mpText;

    /** This object can be used to modify the child list of our parent.

    */

    IAccessibleParent* mpParent;

    /** This object can be removed when we have an extra interface to ask if the shape is selected

    */

    SdrObject* m_pShape;

    /** This method is called from the component helper base class while

        disposing.

    */

    virtual void SAL_CALL disposing() override;

    /** Create a base name string that contains the accessible name.

        @throws css::uno::RuntimeException

    */

    virtual OUString

        CreateAccessibleBaseName();

    /** Create a unique name string that contains the accessible name.  The

        name consists of the base name and the index.

    */

    virtual OUString

        CreateAccessibleName() override;

    /// @throws css::uno::RuntimeException

    OUString

       GetFullAccessibleName(AccessibleShape *shape);

    virtual OUString GetStyle() const;

    /** Update the <const>OPAQUE</const> and <const>SELECTED</const> state.

    */

    void UpdateStates();

private:

    AccessibleShape (const AccessibleShape&) = delete;

    AccessibleShape& operator= (const AccessibleShape&) = delete;

    //Old accessible name

    OUString m_aAccName;

    /** Call this method when the title, name, or description of the mxShape

        member (may) have been changed.

        This method adapts the name and description members of the

        AccessibleContextBase base class.

    */

    void UpdateNameAndDescription();

};

} // end of namespace accessibility

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