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 * 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
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#ifndef INCLUDED_VCL_MENU_HXX
#define INCLUDED_VCL_MENU_HXX

#include <memory>
#include <string_view>

#include <comphelper/OAccessible.hxx>
#include <vcl/vclenum.hxx>
#include <tools/link.hxx>
#include <tools/long.hxx>
#include <vcl/dllapi.h>
#include <vcl/keycod.hxx>
#include <vcl/vclptr.hxx>
#include <vcl/vclreferencebase.hxx>
#include <com/sun/star/uno/Reference.hxx>
#include <o3tl/typed_flags_set.hxx>
#include <tools/json_writer.hxx>
#include <list>

class OutputDevice;
struct ImplSVEvent;
struct MenuItemData;
class Point;
class Size;
namespace tools { class Rectangle; }
class Menu;
class MenuItemList;
class Image;
class PopupMenu;
class KeyEvent;
class CommandEvent;
class MenuFloatingWindow;
class SalMenu;
class MenuBarWindow;
class VclMenuEvent;
struct SystemMenuData;
enum class VclEventId;

namespace com::sun::star::awt { class XPopupMenu; }

namespace vcl
{
class Window;
struct MenuLayoutData;
typedef OutputDevice RenderContext; // same as in include/vcl/outdev.hxx
}

constexpr sal_uInt16 MENU_APPEND = 0xFFFF;
constexpr sal_uInt16 MENU_ITEM_NOTFOUND = 0xFFFF;

// Must match the definitions in css::awt::PopupMenuDirection.idl
enum class PopupMenuFlags
{
    NONE            = 0x0000,
    ExecuteDown     = 0x0001,
    ExecuteUp       = 0x0002,
    ExecuteRight    = 0x0008,
    NoMouseUpClose  = 0x0010,
};

namespace o3tl
{
    template<> struct typed_flags<PopupMenuFlags> : is_typed_flags<PopupMenuFlags, 0x001b> {};
}

enum class MenuFlags
{
    NONE                      = 0x0000,
    NoAutoMnemonics           = 0x0001,
    HideDisabledEntries       = 0x0002,
    // overrides default hiding of disabled entries in popup menus
    AlwaysShowDisabledEntries = 0x0004,
};

namespace o3tl
{
    template<> struct typed_flags<MenuFlags> : is_typed_flags<MenuFlags, 0x0007> {};
}

/// Invalid menu item id
constexpr auto ITEMPOS_INVALID = 0xFFFF;

struct ImplMenuDelData
{
    ImplMenuDelData* mpNext;
    VclPtr<const Menu> mpMenu;

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

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

typedef void (*MenuUserDataReleaseFunction)(void*);

class VCL_DLLPUBLIC Menu : public VclReferenceBase
{
    friend class MenuBar;
    friend class MenuBarWindow;
    friend class MenuButton;
    friend class MenuFloatingWindow;
    friend class PopupMenu;
    friend class SystemWindow;
    friend struct ImplMenuDelData;
private:
    ImplMenuDelData* mpFirstDel;
    std::unique_ptr<MenuItemList> pItemList; // list with MenuItems
    VclPtr<Menu> pStartedFrom;
    VclPtr<vcl::Window> m_pWindow;

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

    std::list<Link<VclMenuEvent&,void> >  maEventListeners;

    OUString maID;

    OUString aTitleText;         // PopupMenu text
    sal_uInt16 nTitleHeight;

    ImplSVEvent* nEventId;
    sal_uInt16 mnHighlightedItemPos; // for native menus: keeps track of the highlighted item
    MenuFlags nMenuFlags;
    sal_uInt16 nSelectedId;
    OUString sSelectedIdent;

    // for output:
    sal_uInt16 nImgOrChkPos;
    sal_uInt16 nTextPos;

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

    rtl::Reference<comphelper::OAccessible> mpAccessible;
    mutable std::unique_ptr<vcl::MenuLayoutData> mpLayoutData;
    std::unique_ptr<SalMenu> mpSalMenu;

    // Stores the help ID of the menu
    OUString m_sMenuHelpId;

protected:
    SAL_DLLPRIVATE Menu* ImplGetStartMenu();
    SAL_DLLPRIVATE Menu* ImplFindSelectMenu();
    SAL_DLLPRIVATE Menu* ImplFindMenu( sal_uInt16 nId );
    SAL_DLLPRIVATE Size  ImplCalcSize( vcl::Window* pWin );
    SAL_DLLPRIVATE bool  ImplIsVisible( sal_uInt16 nPos ) const;
    SAL_DLLPRIVATE bool  ImplCurrentlyHiddenOnGUI(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::RenderContext& rRenderContext, Size const & rSize,
                                  sal_uInt16 nBorder, tools::Long nOffY = 0, MenuItemData const * pThisDataOnly = nullptr,
                                  bool bHighlighted = false, bool bLayout = false, bool bRollover = false ) const;
    SAL_DLLPRIVATE void ImplPaintMenuTitle(vcl::RenderContext&, const tools::Rectangle& rRect) const;
    SAL_DLLPRIVATE void ImplSelect();
    SAL_DLLPRIVATE void ImplCallHighlight( sal_uInt16 nHighlightItem );
    SAL_DLLPRIVATE void ImplCallEventListeners( VclEventId nEvent, sal_uInt16 nPos );
    DECL_DLLPRIVATE_LINK(ImplCallSelect, void*, void );

    SAL_DLLPRIVATE void ImplFillLayoutData() const;
    SAL_DLLPRIVATE SalMenu* ImplGetSalMenu() const { return mpSalMenu.get(); }
    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(vcl::RenderContext const & rRenderContext, tools::Long& rCheckHeight, tools::Long& rRadioHeight) const;

    // returns native submenu arrow size and spacing from right border
    // return value is whether it's supported natively
    SAL_DLLPRIVATE static bool ImplGetNativeSubmenuArrowSize(vcl::RenderContext const & rRenderContext, Size& rArrowSize, tools::Long& rArrowSpacing);

    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 OUString &rIdent);

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

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

public:
    SAL_DLLPRIVATE void ImplKillLayoutData() const;

#if defined(MACOSX)
    void ImplSelectWithStart( Menu* pStartMenu = nullptr );
#endif

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() override;
    virtual void dispose() override;

    void Activate();
    void Deactivate();
    void Select();

    void InsertItem(sal_uInt16 nItemId, const OUString& rStr,
                    MenuItemBits nItemBits = MenuItemBits::NONE,
                    const OUString &rIdent = {},
                    sal_uInt16 nPos = MENU_APPEND);
    void InsertItem(sal_uInt16 nItemId, const Image& rImage,
                    MenuItemBits nItemBits = MenuItemBits::NONE,
                    const OUString &rIdent = {},
                    sal_uInt16 nPos = MENU_APPEND);
    void InsertItem(sal_uInt16 nItemId,
                    const OUString& rString, const Image& rImage,
                    MenuItemBits nItemBits = MenuItemBits::NONE,
                    const OUString &rIdent = {},
                    sal_uInt16 nPos = MENU_APPEND);
    void InsertSeparator(const OUString &rIdent = {}, sal_uInt16 nPos = MENU_APPEND);
    void RemoveItem( sal_uInt16 nPos );
    void Clear();

    void CreateAutoMnemonics();

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

    bool HasValidEntries(bool bCheckPopups) const;
    sal_uInt16 GetItemCount() const;
    sal_uInt16 GetItemId(sal_uInt16 nPos) const;
    sal_uInt16 GetItemId(std::u16string_view rIdent) const;
    sal_uInt16 GetItemPos( sal_uInt16 nItemId ) const;
    OUString GetItemIdent(sal_uInt16 nItemId) const;
    MenuItemType GetItemType( sal_uInt16 nPos ) const;
    sal_uInt16 GetCurItemId() const { return nSelectedId;}
    OUString const & GetCurItemIdent() const { return sSelectedIdent; }
    void SetItemBits( sal_uInt16 nItemId, MenuItemBits nBits );
    MenuItemBits GetItemBits( sal_uInt16 nItemId ) const;

    void SetUserValue(sal_uInt16 nItemId, void* nUserValue, MenuUserDataReleaseFunction aFunc=nullptr);
    void* 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 );
    void CheckItem( std::u16string_view rIdent, bool bCheck = true );
    bool IsItemCheckable(sal_uInt16 nItemId) const;
    bool IsItemChecked( sal_uInt16 nItemId ) const;

    virtual void SelectItem(sal_uInt16 nItemId) = 0;

    void EnableItem( sal_uInt16 nItemId, bool bEnable = true );
    void EnableItem(std::u16string_view 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 bRemoveEmptyPopups = false );

    void UpdateNativeMenu();

    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 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 OUString& rHelpId );
    OUString GetHelpId( sal_uInt16 nItemId ) const;

    void SetHelpId( const OUString& rHelpId ) { m_sMenuHelpId = rHelpId; }
    const OUString & GetHelpId() const { return m_sMenuHelpId; }

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

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

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

    sal_uInt16 GetTitleHeight() const
    {
        return nTitleHeight;
    }

    void AddEventListener( const Link<VclMenuEvent&,void>& rEventListener );
    void RemoveEventListener( const Link<VclMenuEvent&,void>& rEventListener );

    Menu& operator =( const Menu& rMenu );

    // for menu functions
    MenuItemList* GetItemList() const
    {
        return pItemList.get();
    }

    // returns the system's menu handle if native menus are supported
    void GetSystemMenuData(SystemMenuData& rData) 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)
    tools::Rectangle GetCharacterBounds( sal_uInt16 nItemId, tools::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)
    tools::Long GetIndexForPoint( const Point& rPoint, sal_uInt16& rItemID ) const;
    // returns the bounding rectangle for an item at pos nItemPos
    tools::Rectangle GetBoundingRectangle( sal_uInt16 nItemPos ) const;

    rtl::Reference<comphelper::OAccessible> GetAccessible();
    void SetAccessible(const rtl::Reference<comphelper::OAccessible>& rAccessible);

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

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

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

    void SetAccessibleDescription( sal_uInt16 nItemId, const OUString& rStr );
    OUString GetAccessibleDescription( 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

    bool HandleMenuCommandEvent(Menu* pMenu, sal_uInt16 nEventId);
    bool HandleMenuActivateEvent(Menu* pMenu);
    bool HandleMenuDeActivateEvent(Menu* pMenu);

    /**
     * Sets an ID.
     */
    void set_id(const OUString& rID) { maID = rID; }

    /**
     * Get the ID of the window.
     */
    const OUString& get_id() const { return maID; }

    virtual void DumpAsPropertyTree(tools::JsonWriter&) const;

private:
    rtl::Reference<comphelper::OAccessible> CreateAccessible();
};

struct MenuBarButtonCallbackArg
{
    sal_uInt16 nId;    // Id of the button
    bool bHighlight;   // highlight on/off
};

class VCL_DLLPUBLIC MenuBar final : public Menu
{
    Link<void*,void> maCloseHdl;
    bool mbCloseBtnVisible : 1;
    bool mbFloatBtnVisible : 1;
    bool mbHideBtnVisible : 1;
    bool mbDisplayable : 1;

    friend class Menu;
    friend class MenuBarWindow;
    friend class SystemWindow;

    SAL_DLLPRIVATE VclPtr<MenuBarWindow> ImplCreate(vcl::Window* pParent, MenuBarWindow* pWindow);
    SAL_DLLPRIVATE void ImplDestroy(bool bDelete);
    SAL_DLLPRIVATE bool ImplHandleKeyEvent(const KeyEvent& rKEvent);
    SAL_DLLPRIVATE bool ImplHandleCmdEvent(const CommandEvent& rCEvent);

public:
    MenuBar();
    SAL_DLLPRIVATE MenuBar( const MenuBar& rMenu );
    SAL_DLLPRIVATE virtual ~MenuBar() override;
    virtual void dispose() override;

    MenuBar& operator =( const MenuBar& rMenu );

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

    /// Return the MenuBarWindow.
    SAL_DLLPRIVATE MenuBarWindow* getMenuBarWindow();

    /// Close the 'pStartedFrom' menu window.
    virtual void ClosePopup(PopupMenu* pPopupMenu) override;

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

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

    SAL_DLLPRIVATE virtual void SelectItem(sal_uInt16 nId) override;
    SAL_DLLPRIVATE bool HandleMenuHighlightEvent(Menu* pMenu, sal_uInt16 nEventId);
    bool HandleMenuButtonEvent(sal_uInt16 nEventId);

    void SetCloseButtonClickHdl( const Link<void*,void>& rLink ) { maCloseHdl = rLink; }
    const Link<void*,void>& GetCloseButtonClickHdl() const       { return maCloseHdl; }

    //  - 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 displayable, this does not necessarily mean that it is currently visible
    void SetDisplayable( bool bDisplayable );
    bool IsDisplayable() const                       { return mbDisplayable; }

    // 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_DLLPRIVATE sal_uInt16 AddMenuBarButton( const Image&, const Link<MenuBarButtonCallbackArg&,bool>&, const OUString& );
    // 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
    SAL_DLLPRIVATE void SetMenuBarButtonHighlightHdl( sal_uInt16 nId, const Link<MenuBarButtonCallbackArg&,bool>& );
    // returns the rectangle occupied by the additional button named nId
    // coordinates are relative to the systemwindow the menubar is attached to
    // if the menubar is unattached an empty rectangle is returned
    SAL_DLLPRIVATE tools::Rectangle GetMenuBarButtonRectPixel( sal_uInt16 nId );
    SAL_DLLPRIVATE void RemoveMenuBarButton( sal_uInt16 nId );
    void LayoutChanged();
    // get the height of the menubar, return the native menubar height if that is active or the vcl
    // one if not
    SAL_DLLPRIVATE int GetMenuBarHeight() const;
};

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

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

private:
    SAL_DLLPRIVATE MenuFloatingWindow * ImplGetFloatingWindow() const;
    SAL_DLLPRIVATE bool Run(const VclPtr<MenuFloatingWindow>&, bool bRealExecute, bool bPreSelectFirst, FloatWinPopupFlags nPopupModeFlags, Menu* pSFrom, const tools::Rectangle& rRect);
    SAL_DLLPRIVATE void FinishRun(const VclPtr<MenuFloatingWindow>&, const VclPtr<vcl::Window>& pParentWin, bool bRealExecute, bool bIsNativeMenu);
    SAL_DLLPRIVATE sal_uInt16 ImplExecute(const VclPtr<vcl::Window>& pParentWin, const tools::Rectangle& rRect, FloatWinPopupFlags nPopupModeFlags, Menu* pSFrom, bool bPreSelectFirst);
    SAL_DLLPRIVATE void ImplFlushPendingSelect();
    SAL_DLLPRIVATE tools::Long ImplCalcHeight( sal_uInt16 nEntries ) const;
    SAL_DLLPRIVATE sal_uInt16 ImplCalcVisEntries( tools::Long nMaxHeight, sal_uInt16 nStartEntry, sal_uInt16* pLastVisible = nullptr ) const;

public:
    PopupMenu();
    PopupMenu( const PopupMenu& rMenu );
    virtual ~PopupMenu() override;

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

    /// Close the 'pStartedFrom' menu window.
    SAL_DLLPRIVATE virtual void ClosePopup(PopupMenu* pPopupMenu) override;

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

    sal_uInt16 Execute( vcl::Window* pWindow, const Point& rPopupPos );
    sal_uInt16 Execute( vcl::Window* pWindow, const tools::Rectangle& rRect, PopupMenuFlags nFlags = PopupMenuFlags::NONE );

    // for the TestTool
    void EndExecute();
    virtual void SelectItem(sal_uInt16 nId) override;
    void SetSelectedEntry( sal_uInt16 nId ); // for use by native submenu only

    css::uno::Reference<css::awt::XPopupMenu> CreateMenuInterface();

    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

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
