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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_VCL_MENU_HXX
#define INCLUDED_VCL_MENU_HXX

#include <rsc/rsc-vcl-shared-types.hxx>
#include <tools/color.hxx>
#include <tools/rc.hxx>
#include <tools/resid.hxx>
#include <tools/solar.h>
#include <vcl/dllapi.h>
#include <vcl/bitmapex.hxx>
#include <vcl/keycod.hxx>
#include <vcl/vclevent.hxx>
#include <com/sun/star/frame/XFrame.hpp>
#include <com/sun/star/uno/Reference.hxx>

struct ImplSVEvent;
struct MenuItemData;
class Point;
class Size;
class Rectangle;
class Menu;
class MenuItemList;
class HelpEvent;
class Image;
class PopupMenu;
class KeyEvent;
class MenuFloatingWindow;
namespace vcl { class Window; }
class SalMenu;
class IMenuBarWindow;
struct SystemMenuData;
enum class FloatWinPopupFlags;

namespace com {
namespace sun {
namespace star {
namespace accessibility {
    class XAccessible;
}}}}

namespace vcl { struct MenuLayoutData; }


// - Menu-Types -


#define MENU_APPEND             ((sal_uInt16)0xFFFF)
#define MENU_ITEM_NOTFOUND      ((sal_uInt16)0xFFFF)

#define POPUPMENU_EXECUTE_DOWN     ((sal_uInt16)0x0001)
#define POPUPMENU_EXECUTE_UP       ((sal_uInt16)0x0002)
#define POPUPMENU_EXECUTE_LEFT     ((sal_uInt16)0x0004)
#define POPUPMENU_EXECUTE_RIGHT    ((sal_uInt16)0x0008)
#define POPUPMENU_NOMOUSEUPCLOSE   ((sal_uInt16)0x0010)
//If there isn't enough space to put the menu where it wants
//to go, then they will be autoplaced. Toggle this bit
//on to force menus to be placed either above or below
//the starting rectangle and shrunk to fit and then scroll rather than place
//the menu beside that rectangle
#define POPUPMENU_NOHORZ_PLACEMENT ((sal_uInt16)0x0020)

#define MENU_FLAG_NOAUTOMNEMONICS       0x0001
#define MENU_FLAG_HIDEDISABLEDENTRIES   0x0002

// overrides default hiding of disabled entries in popup menus
#define MENU_FLAG_ALWAYSSHOWDISABLEDENTRIES 0x0004

/// Invalid menu item id
#define ITEMPOS_INVALID     0xFFFF

struct ImplMenuDelData
{
    ImplMenuDelData* mpNext;
    const Menu* mpMenu;

    explicit ImplMenuDelData( const Menu* );
    ~ImplMenuDelData();

    bool isDeleted() const { return mpMenu == 0; }
};


// - Menu -


struct MenuLogo
{
    BitmapEx    aBitmap;
    Color       aStartColor;
    Color       aEndColor;
};

typedef void (*MenuUserDataReleaseFunction)(sal_uLong);

class VCL_DLLPUBLIC Menu : public Resource
{
    friend class MenuBar;
    friend class MenuBarWindow;
    friend class MenuButton;
    friend class MenuFloatingWindow;
    friend class PopupMenu;
    friend class SystemWindow;
    friend struct ImplMenuDelData;
private:
    ImplMenuDelData*    mpFirstDel;
    MenuItemList*       pItemList;          // Liste mit den MenuItems
    MenuLogo*           pLogo;
    Menu*               pStartedFrom;
    VclPtr<vcl::Window> pWindow;

    Link<Menu *, bool>  aActivateHdl;       // Active-Handler
    Link<Menu *, bool>  aDeactivateHdl;     // Deactivate-Handler
    Link<Menu *, bool>  aHighlightHdl;      // Highlight-Handler
    Link<>              aSelectHdl;         // Highlight-Handler

    VclEventListeners   maEventListeners;
    VclEventListeners   maChildEventListeners;

    OUString            aTitleText;         // PopupMenu text

    ImplSVEvent *       nEventId;
    sal_uInt16          mnHighlightedItemPos; // for native menus: keeps track of the highlighted item
    sal_uInt16          nMenuFlags;
    sal_uInt16          nDefaultItem;       // Id of default item
    sal_uInt16          nSelectedId;

    // for output:
    sal_uInt16          nImgOrChkPos;
    sal_uInt16          nTextPos;

    bool                bCanceled   : 1,        ///< Terminated during a callback
                        bInCallback : 1,        ///< In Activate/Deactivate
                        bKilled     : 1;        ///< Killed

    ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible > mxAccessible;
    mutable vcl::MenuLayoutData* mpLayoutData;
    SalMenu*            mpSalMenu;

protected:
    SAL_DLLPRIVATE Menu*            ImplGetStartMenu();
    SAL_DLLPRIVATE Menu*            ImplFindSelectMenu();
    SAL_DLLPRIVATE Menu*            ImplFindMenu( sal_uInt16 nId );
    SAL_DLLPRIVATE Size             ImplCalcSize( const vcl::Window* pWin );
    SAL_DLLPRIVATE bool             ImplIsVisible( sal_uInt16 nPos ) const;
    SAL_DLLPRIVATE bool             ImplIsSelectable( sal_uInt16 nPos ) const;
    SAL_DLLPRIVATE sal_uInt16           ImplGetVisibleItemCount() const;
    SAL_DLLPRIVATE sal_uInt16           ImplGetFirstVisible() const;
    SAL_DLLPRIVATE sal_uInt16           ImplGetPrevVisible( sal_uInt16 nPos ) const;
    SAL_DLLPRIVATE sal_uInt16           ImplGetNextVisible( sal_uInt16 nPos ) const;
    SAL_DLLPRIVATE void             ImplPaint( vcl::Window* pWin, sal_uInt16 nBorder, long nOffY = 0, MenuItemData* pThisDataOnly = 0, bool bHighlighted = false, bool bLayout = false, bool bRollover = false ) const;
    SAL_DLLPRIVATE void             ImplSelect();
    SAL_DLLPRIVATE void             ImplCallHighlight( sal_uInt16 nHighlightItem );
    SAL_DLLPRIVATE void             ImplCallEventListeners( sal_uLong nEvent, sal_uInt16 nPos );
    DECL_DLLPRIVATE_LINK(           ImplCallSelect, void* );

    SAL_DLLPRIVATE void             ImplFillLayoutData() const;
    SAL_DLLPRIVATE SalMenu*         ImplGetSalMenu() { return mpSalMenu; }
    SAL_DLLPRIVATE void             ImplSetSalMenu( SalMenu *pMenu );
    SAL_DLLPRIVATE OUString         ImplGetHelpText( sal_uInt16 nItemId ) const;

    // returns native check and option menu symbol height in rCheckHeight and rRadioHeight
    // return value is maximum width and height of checkboxes and radiobuttons
    SAL_DLLPRIVATE Size             ImplGetNativeCheckAndRadioSize( const vcl::Window*, long& rCheckHeight, long& rRadioHeight ) const;

    // returns native submenu arrow size and spacing from right border
    // return value is whether it's supported natively
    SAL_DLLPRIVATE bool         ImplGetNativeSubmenuArrowSize( vcl::Window* pWin, Size& rArrowSize, long& rArrowSpacing ) const;

    SAL_DLLPRIVATE void                ImplAddDel( ImplMenuDelData &rDel );
    SAL_DLLPRIVATE void                ImplRemoveDel( ImplMenuDelData &rDel );

    SAL_DLLPRIVATE MenuItemData* NbcInsertItem(sal_uInt16 nId, MenuItemBits nBits,
                                               const OUString& rStr, Menu* pMenu,
                                               size_t nPos, const OString &rIdent);

    /// Close the 'pStartedFrom' menu window.
    virtual void ClosePopup(Menu* pMenu) = 0;

    /// Deactivate the MenuBarWindow.
    virtual sal_uLong DeactivateMenuBar(sal_uLong nFocusId);

    /// Forward the KeyInput call to the MenuBar.
    virtual void MenuBarKeyInput(const KeyEvent& rEvent);

public:
    SAL_DLLPRIVATE void             ImplKillLayoutData() const;
    SAL_DLLPRIVATE Menu*            ImplGetStartedFrom() const { return pStartedFrom; }

    SAL_DLLPRIVATE vcl::Window*  ImplGetWindow() const { return pWindow; }
    void ImplSelectWithStart( Menu* pStartMenu = NULL );

protected:

    /** The Menu constructor is protected.

    The callers are supposed to instantiate either PopupMenu or MenuBar, but
    not a Menu directly.
    */
    Menu();

public:
    virtual             ~Menu();

    void                Activate();
    void                Deactivate();
    virtual void        Highlight();
    virtual void        Select();

    void                InsertItem( sal_uInt16 nItemId, const OUString& rStr,
                                    MenuItemBits nItemBits = MenuItemBits::NONE,
                                    const OString &rIdent = OString(),
                                    sal_uInt16 nPos = MENU_APPEND );
    void                InsertItem( sal_uInt16 nItemId, const Image& rImage,
                                    MenuItemBits nItemBits = MenuItemBits::NONE,
                                    const OString &rIdent = OString(),
                                    sal_uInt16 nPos = MENU_APPEND );
    void                InsertItem( sal_uInt16 nItemId,
                                    const OUString& rString, const Image& rImage,
                                    MenuItemBits nItemBits = MenuItemBits::NONE,
                                    const OString &rIdent = OString(),
                                    sal_uInt16 nPos = MENU_APPEND );
    void                InsertItem( const ResId& rResId, sal_uInt16 nPos = MENU_APPEND );
    void                InsertSeparator( const OString &rIdent = OString(),
                            sal_uInt16 nPos = MENU_APPEND );
    void                RemoveItem( sal_uInt16 nPos );
    void                CopyItem( const Menu& rMenu, sal_uInt16 nPos,
                                  sal_uInt16 nNewPos = MENU_APPEND );
    void                Clear();

    void                CreateAutoMnemonics();

    void                SetMenuFlags( sal_uInt16 nFlags ) { nMenuFlags = nFlags; }
    sal_uInt16          GetMenuFlags() const { return nMenuFlags; }

    sal_uInt16          GetItemCount() const;
    sal_uInt16          GetItemId(sal_uInt16 nPos) const;
    sal_uInt16          GetItemId(const OString &rIdent) const;
    sal_uInt16          GetItemPos( sal_uInt16 nItemId ) const;
    OString             GetItemIdent(sal_uInt16 nItemId) const;
    MenuItemType        GetItemType( sal_uInt16 nPos ) const;
    sal_uInt16          GetCurItemId() const { return nSelectedId;}
    OString             GetCurItemIdent() const;

    void                SetDefaultItem( sal_uInt16 nItemId )    { nDefaultItem = nItemId; }
    sal_uInt16          GetDefaultItem() const              { return nDefaultItem; }

    void                SetItemBits( sal_uInt16 nItemId, MenuItemBits nBits );
    MenuItemBits        GetItemBits( sal_uInt16 nItemId ) const;

    void                SetUserValue(sal_uInt16 nItemId, sal_uLong nValue, MenuUserDataReleaseFunction aFunc=0);
    sal_uLong           GetUserValue(sal_uInt16 nItemId) const;

    void                SetPopupMenu( sal_uInt16 nItemId, PopupMenu* pMenu );
    PopupMenu*          GetPopupMenu( sal_uInt16 nItemId ) const;

    void                SetAccelKey( sal_uInt16 nItemId, const vcl::KeyCode& rKeyCode );
    vcl::KeyCode        GetAccelKey( sal_uInt16 nItemId ) const;

    void                CheckItem( sal_uInt16 nItemId, bool bCheck = true );
    bool                IsItemChecked( sal_uInt16 nItemId ) const;

    virtual void        SelectItem(sal_uInt16 nItemId) = 0;
    void                DeSelect() { SelectItem( 0xFFFF ); } // MENUITEMPOS_INVALID

    void                EnableItem( sal_uInt16 nItemId, bool bEnable = true );
    void                EnableItem(const OString &rIdent, bool bEnable = true)
    {
        EnableItem(GetItemId(rIdent), bEnable);
    }
    bool                IsItemEnabled( sal_uInt16 nItemId ) const;

    void                ShowItem( sal_uInt16 nItemId, bool bVisible = true );
    void                HideItem( sal_uInt16 nItemId ) { ShowItem( nItemId, false ); }

    bool                IsItemPosVisible( sal_uInt16 nItemPos ) const;
    bool                IsMenuVisible() const;
    virtual bool        IsMenuBar() const = 0;

    void                RemoveDisabledEntries( bool bCheckPopups = true, bool bRemoveEmptyPopups = false );
    bool                HasValidEntries( bool bCheckPopups = true );

    void                SetItemText( sal_uInt16 nItemId, const OUString& rStr );
    OUString            GetItemText( sal_uInt16 nItemId ) const;

    void                SetItemImage( sal_uInt16 nItemId, const Image& rImage );
    Image               GetItemImage( sal_uInt16 nItemId ) const;
    void                SetItemImageAngle( sal_uInt16 nItemId, long nAngle10 );
    void                SetItemImageMirrorMode( sal_uInt16 nItemId, bool bMirror );

    void                SetItemCommand( sal_uInt16 nItemId, const OUString& rCommand );
    OUString            GetItemCommand( sal_uInt16 nItemId ) const;

    void                SetHelpText( sal_uInt16 nItemId, const OUString& rString );
    OUString            GetHelpText( sal_uInt16 nItemId ) const;

    void                SetTipHelpText( sal_uInt16 nItemId, const OUString& rString );
    OUString            GetTipHelpText( sal_uInt16 nItemId ) const;

    void                SetHelpCommand( sal_uInt16 nItemId, const OUString& rString );
    OUString            GetHelpCommand( sal_uInt16 nItemId ) const;

    void                SetHelpId( sal_uInt16 nItemId, const OString& rHelpId );
    OString             GetHelpId( sal_uInt16 nItemId ) const;

    void                SetActivateHdl( const Link<Menu *, bool>& rLink )   { aActivateHdl = rLink; }

    void                SetDeactivateHdl( const Link<Menu *, bool>& rLink ) { aDeactivateHdl = rLink; }

    void                SetHighlightHdl( const Link<Menu *, bool>& rLink )  { aHighlightHdl = rLink; }

    void                SetSelectHdl( const Link<>& rLink )     { aSelectHdl = rLink; }
    const Link<>&       GetSelectHdl() const                    { return aSelectHdl; }

    bool                HasLogo() const { return pLogo != nullptr; }

    void                AddEventListener( const Link<>& rEventListener );
    void                RemoveEventListener( const Link<>& rEventListener );
    void                AddChildEventListener( const Link<>& rEventListener );
    void                RemoveChildEventListener( const Link<>& rEventListener );

    Menu&               operator =( const Menu& rMenu );

    // Fuer Menu-'Funktionen'
    MenuItemList*       GetItemList() const                     { return pItemList; }

    // returns the system's menu handle if native menus are supported
    // pData must point to a SystemMenuData structure
    bool                GetSystemMenuData( SystemMenuData* pData ) const;

    // accessibility helpers

    // returns the bounding box for the character at index nIndex
    // where nIndex is relative to the starting index of the item
    // with id nItemId (in coordinates of the displaying window)
    Rectangle GetCharacterBounds( sal_uInt16 nItemId, long nIndex ) const;
    // -1 is returned if no character is at that point
    // if an index is found the corresponding item id is filled in (else 0)
    long GetIndexForPoint( const Point& rPoint, sal_uInt16& rItemID ) const;
    // returns the bounding rectangle for an item at pos nItemPos
    Rectangle GetBoundingRectangle( sal_uInt16 nItemPos ) const;

    ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible > GetAccessible();
    void SetAccessible( const ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible >& rxAccessible );

    // gets the activation key of the specified item
    KeyEvent            GetActivationKey( sal_uInt16 nItemId ) const;

    vcl::Window*        GetWindow() const { return pWindow; }

    void                SetAccessibleName( sal_uInt16 nItemId, const OUString& rStr );
    OUString            GetAccessibleName( sal_uInt16 nItemId ) const;

    // returns whether the item a position nItemPos is highlighted or not.
    bool                IsHighlighted( sal_uInt16 nItemPos ) const;

    void                HighlightItem( sal_uInt16 nItemPos );
    void                DeHighlight() { HighlightItem( 0xFFFF ); } // MENUITEMPOS_INVALID
};


namespace vcl
{
    namespace MenuInvalidator
    {
        VCL_DLLPUBLIC VclEventListeners2* GetMenuInvalidateListeners();
        VCL_DLLPUBLIC void Invalidated();
    };
}

// - MenuBar -


class VCL_DLLPUBLIC MenuBar : public Menu
{
    Link<>              maCloseHdl;
    Link<>              maFloatHdl;
    Link<>              maHideHdl;
    bool                mbCloseBtnVisible;
    bool                mbFloatBtnVisible;
    bool                mbHideBtnVisible;
    bool                mbDisplayable;

    friend class Application;
    friend class Menu;
    friend class MenuBarWindow;
    friend class MenuFloatingWindow;
    friend class SystemWindow;

    SAL_DLLPRIVATE static vcl::Window* ImplCreate(vcl::Window* pParent, vcl::Window* pWindow, MenuBar* pMenu, const css::uno::Reference<css::frame::XFrame> &rFrame);
    SAL_DLLPRIVATE static void         ImplDestroy( MenuBar* pMenu, bool bDelete );
    SAL_DLLPRIVATE bool                ImplHandleKeyEvent( const KeyEvent& rKEvent, bool bFromMenu = true );

protected:

    /// Return the IMenuBarWindow interface.
    IMenuBarWindow* getMenuBarWindow();

public:
                        MenuBar();
                        MenuBar( const MenuBar& rMenu );
                        virtual ~MenuBar();

    MenuBar&            operator =( const MenuBar& rMenu );

    virtual bool        IsMenuBar() const SAL_OVERRIDE { return true; }

    /// Close the 'pStartedFrom' menu window.
    virtual void ClosePopup(Menu* pMenu) SAL_OVERRIDE;

    /// Deactivate the MenuBarWindow.
    virtual sal_uLong DeactivateMenuBar(sal_uLong nFocusId) SAL_OVERRIDE;

    /// Forward the KeyInput call to the MenuBar.
    virtual void MenuBarKeyInput(const KeyEvent& rEvent) SAL_OVERRIDE;

    void                ShowCloseButton( bool bShow = true );
    bool                HasCloseButton() const { return mbCloseBtnVisible; }
    bool            HasFloatButton() const { return mbFloatBtnVisible; }
    bool            HasHideButton() const { return mbHideBtnVisible; }
    void                ShowButtons( bool bClose, bool bFloat, bool bHide );

    virtual void        SelectItem(sal_uInt16 nId) SAL_OVERRIDE;
    bool                HandleMenuActivateEvent(Menu *pMenu) const;
    bool                HandleMenuDeActivateEvent(Menu *pMenu) const;
    bool                HandleMenuHighlightEvent(Menu *pMenu, sal_uInt16 nEventId) const;
    bool                HandleMenuCommandEvent(Menu *pMenu, sal_uInt16 nEventId) const;
    bool                HandleMenuButtonEvent(Menu *pMenu, sal_uInt16 nEventId);

    void                SetCloseButtonClickHdl( const Link<>& rLink ) { maCloseHdl = rLink; }
    const Link<>&       GetCloseButtonClickHdl() const              { return maCloseHdl; }
    void                SetFloatButtonClickHdl( const Link<>& rLink ) { maFloatHdl = rLink; }
    const Link<>&       GetFloatButtonClickHdl() const              { return maFloatHdl; }
    void                SetHideButtonClickHdl( const Link<>& rLink ) { maHideHdl = rLink; }
    const Link<>&       GetHideButtonClickHdl() const               { return maHideHdl; }

    //  - by default a menubar is displayable
    //  - if a menubar is not displayable, its MenuBarWindow will never be shown
    //    and it will be hidden if it was visible before
    //  - note: if a menubar is diplayable, this does not necessarily mean that it is currently visible
    void                SetDisplayable( bool bDisplayable );
    bool            IsDisplayable() const                       { return mbDisplayable; }

    struct MenuBarButtonCallbackArg
    {
        sal_uInt16      nId;             // Id of the button
        bool            bHighlight;      // highlight on/off
        MenuBar*        pMenuBar;        // menubar the button belongs to
    };
    // add an arbitrary button to the menubar (will appear next to closer)
    // passed link will be call with a MenuBarButtonCallbackArg on press
    // passed string will be set as tooltip
    sal_uInt16          AddMenuBarButton( const Image&, const Link<>&, const OUString&, sal_uInt16 nPos = 0 );
    // set the highlight link for additional button with ID nId
    // highlight link will be called with a MenuBarButtonHighlightArg
    // the bHighlight member of that struct shall contain the new state
    void                SetMenuBarButtonHighlightHdl( sal_uInt16 nId, const Link<>& );
    // returns the rectangle occupied by the additional button named nId
    // coordinates are relative to the systemwindiow the menubar is attached to
    // if the menubar is unattached an empty rectangle is returned
    Rectangle           GetMenuBarButtonRectPixel( sal_uInt16 nId );
    void                RemoveMenuBarButton( sal_uInt16 nId );
};

inline MenuBar& MenuBar::operator =( const MenuBar& rMenu )
{
    Menu::operator =( rMenu );
    return *this;
}



// - PopupMenu -


class VCL_DLLPUBLIC PopupMenu : public Menu
{
    friend class Menu;
    friend class MenuFloatingWindow;
    friend class MenuBarWindow;
    friend struct MenuItemData;

private:
    Menu**              pRefAutoSubMenu;    // keeps track if a pointer to this Menu is stored in the MenuItemData

    SAL_DLLPRIVATE MenuFloatingWindow * ImplGetFloatingWindow() const;

protected:
    SAL_DLLPRIVATE sal_uInt16                ImplExecute( vcl::Window* pWindow, const Rectangle& rRect, FloatWinPopupFlags nPopupFlags, Menu* pStaredFrom, bool bPreSelectFirst );
    SAL_DLLPRIVATE long                  ImplCalcHeight( sal_uInt16 nEntries ) const;
    SAL_DLLPRIVATE sal_uInt16                ImplCalcVisEntries( long nMaxHeight, sal_uInt16 nStartEntry = 0, sal_uInt16* pLastVisible = NULL ) const;

public:
                        PopupMenu();
                        PopupMenu( const PopupMenu& rMenu );
    explicit            PopupMenu( const ResId& );
    virtual             ~PopupMenu();

    virtual bool        IsMenuBar() const SAL_OVERRIDE { return false; }

    /// Close the 'pStartedFrom' menu window.
    virtual void ClosePopup(Menu* pMenu) SAL_OVERRIDE;

    void                SetText( const OUString& rTitle )  { aTitleText = rTitle; }
    const OUString&     GetText() const                     { return aTitleText; }

    sal_uInt16              Execute( vcl::Window* pWindow, const Point& rPopupPos );
    sal_uInt16              Execute( vcl::Window* pWindow, const Rectangle& rRect, sal_uInt16 nFlags = 0 );

    // Fuer das TestTool
    void                EndExecute( sal_uInt16 nSelect = 0 );
    virtual void        SelectItem(sal_uInt16 nId) SAL_OVERRIDE;
    void                SetSelectedEntry( sal_uInt16 nId ); // for use by native submenu only

    static bool         IsInExecute();
    static PopupMenu*   GetActivePopupMenu();

    PopupMenu&          operator =( const PopupMenu& rMenu );
};

inline PopupMenu& PopupMenu::operator =( const PopupMenu& rMenu )
{
    Menu::operator =( rMenu );
    return *this;
}

#endif // INCLUDED_VCL_MENU_HXX

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