/* -*- 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 .

 */

#pragma once

#include <tools/link.hxx>

#include <tools/fract.hxx>

#include <vcl/weld/Scrollbar.hxx>

#include <vcl/window.hxx>

#include <sfx2/viewfrm.hxx>

#include <sfx2/viewfac.hxx>

#include <sfx2/viewsh.hxx>

#include <sfx2/zoomitem.hxx>

#include <swdllapi.h>

#include <shellid.hxx>

class SwDocShell;

class SwScrollbar;

class SwViewShell;

class SwPagePreview;

class SwRect;

class CommandEvent;

class SwPagePreviewLayout;

/// Provides the VCL widget that is used for the main area of the File -> Print Preview window.

class SAL_DLLPUBLIC_RTTI SwPagePreviewWin final : public vcl::Window

{

    SwViewShell* mpViewShell;

    sal_uInt16 mnSttPage;

    sal_Int16 mnRow;

    sal_Int16 mnCol;

    Size maPxWinSize;

    double mfScale;

    SwPagePreview& mrView;

    bool mbCalcScaleForPreviewLayout;

    tools::Rectangle maPaintedPreviewDocRect;

    SwPagePreviewLayout* mpPgPreviewLayout;

    void SetPagePreview( sal_Int16 nRow, sal_Int16 nCol );

    using Window::Scroll;

public:

    SwPagePreviewWin( vcl::Window* pParent, SwPagePreview& rView );

    virtual ~SwPagePreviewWin() override;

    // calls SwViewShell::Paint

    virtual void Paint( vcl::RenderContext& rRenderContext, const tools::Rectangle& rRect ) override;

    virtual void KeyInput( const KeyEvent & ) override;

    virtual void Command( const CommandEvent& rCEvt ) override;

    virtual void MouseButtonDown(const MouseEvent& rMEvt) override;

    virtual void DataChanged( const DataChangedEvent& ) override;

    void SetViewShell( SwViewShell* pShell );

    SwViewShell* GetViewShell() const

    {

        return mpViewShell;

    }

    sal_Int16 GetRow() const

    {

        return mnRow;

    }

    sal_Int16 GetCol() const

    {

        return mnCol;

    }

    sal_uInt16 GetSttPage() const

    {

        return mnSttPage;

    }

    void SetSttPage(sal_uInt16 n)

    {

        mnSttPage = n;

    }

    /** get selected page number of document preview

        @return selected page number

    */

    sal_uInt16 SelectedPage() const;

    /** set selected page number in document preview

        @param _nSelectedPageNum

        input parameter - physical page number of page that will be the selected one.

    */

    void SetSelectedPage( sal_uInt16 _nSelectedPageNum );

    // If we only have one column we do not have a oth page

    sal_uInt16 GetDefSttPage() const   { return 1 == mnCol ? 1 : 0; }

    void CalcWish( sal_Int16 nNewRow, sal_Int16 nNewCol );

    void SetWinSize( const Size& rNewSize );

    // Add <MV_SELPAGE>, <MV_SCROLL>

    enum MoveMode{ MV_CALC, MV_PAGE_UP, MV_PAGE_DOWN, MV_DOC_STT, MV_DOC_END,

                   MV_SELPAGE, MV_SCROLL, MV_NEWWINSIZE, MV_SPECIFIC_PAGE };

    bool MovePage( int eMoveMode );

    // Create the status bar's string

    OUString GetStatusStr( sal_uInt16 nPageCount ) const;

    void RepaintCoreRect( const SwRect& rRect );

    /** Method to adjust preview to a new zoom factor

        paint of preview is prepared for a new zoom factor

        Zoom type has also been considered.

        Thus, add new parameter <_eZoomType>

    */

    void AdjustPreviewToNewZoom( const sal_uInt16 _nZoomFactor,

                                 const SvxZoomType _eZoomType );

    const tools::Rectangle& GetPaintedPreviewDocRect() const

    {

        return maPaintedPreviewDocRect;

    }

    void Scroll(tools::Long nXMove, tools::Long nYMove, ScrollFlags nFlags = ScrollFlags::NONE) override;

    /** Method to enable/disable book preview

        @param _bBookPreview

        input parameter - boolean indicating, if book preview mode has to

        switch on <true> or of <false>

        @return boolean indicating, if book preview mode has changed.

    */

    bool SetBookPreviewMode( const bool _bBookPreview );

    virtual rtl::Reference<comphelper::OAccessible> CreateAccessible() override;

    void ReInit();

};

/**

 * View of a document

 */

class SW_DLLPUBLIC SwPagePreview final : public SfxViewShell

{

    // ViewWindow and handle to core

    // current dispatcher shell

    VclPtr<SwPagePreviewWin> m_pViewWin;

    //viewdata of the previous SwView and the new cursor position

    OUString m_sSwViewData;

    //and the new cursor position if the user double click in the PagePreview

    OUString m_sNewCursorPosition;

    // to support keyboard the number of the page to go to can be set too

    sal_uInt16 m_nNewPage;

    // visible range

    OUString m_sPageStr;

    Size m_aDocSize;

    tools::Rectangle               m_aVisArea;

    // MDI control elements

    VclPtr<SwScrollbar> m_pHScrollbar;

    VclPtr<SwScrollbar> m_pVScrollbar;

    bool mbHScrollbarEnabled : 1;

    bool mbVScrollbarEnabled : 1;

    sal_uInt16 mnPageCount;

    bool m_bNormalPrint;

    // New members to reset design mode at draw view for form shell on switching

    // back from writer page preview to normal view.

    bool mbResetFormDesignMode:1;

    bool mbFormDesignModeToReset:1;

    SAL_DLLPRIVATE void Init();

    SAL_DLLPRIVATE Point AlignToPixel(const Point& rPt) const;

    SAL_DLLPRIVATE void CreateScrollbar( bool bHori);

    DECL_DLLPRIVATE_LINK(HoriScrollHdl, weld::Scrollbar&, void);

    DECL_DLLPRIVATE_LINK(VertScrollHdl, weld::Scrollbar&, void);

    SAL_DLLPRIVATE void ScrollHdl(const weld::Scrollbar&, bool bHorizontal);

    SAL_DLLPRIVATE void EndScrollHdl(const weld::Scrollbar&, bool bHorizontal);

    SAL_DLLPRIVATE bool ChgPage( int eMvMode, bool bUpdateScrollbar = true );

    SAL_DLLPRIVATE virtual SfxPrinter*     GetPrinter( bool bCreate = false ) override;

    SAL_DLLPRIVATE virtual sal_uInt16      SetPrinter( SfxPrinter *pNewPrinter, SfxPrinterChangeFlags nDiffFlags = SFX_PRINTER_ALL ) override;

    SAL_DLLPRIVATE virtual bool            HasPrintOptionsPage() const override;

    SAL_DLLPRIVATE virtual std::unique_ptr<SfxTabPage> CreatePrintOptionsPage(weld::Container* pPage, weld::DialogController* pController, const SfxItemSet &rOptions) override;

    SAL_DLLPRIVATE void CalcAndSetBorderPixel( SvBorder &rToFill );

    /** Helper method to execute SfxRequest FN_PAGE_UP and FN_PAGE_DOWN

        @param _bPgUp

        input parameter - boolean that indicates, if FN_PAGE_UP or FN_PAGE_DOWN

        has to be executed.

        @param _pReq

        optional input parameter - pointer to the <SfxRequest> instance, if existing.

    */

    SAL_DLLPRIVATE void ExecPgUpAndPgDown( const bool  _bPgUp,

                             SfxRequest* _pReq );

    virtual void    InnerResizePixel( const Point &rOfs, const Size &rSize, bool inplaceEditModeChange ) override;

    virtual void    OuterResizePixel( const Point &rOfs, const Size &rSize ) override;

    void Activate(bool bMDI) override;

    void         SetZoom(SvxZoomType eSet, sal_uInt16 nFactor);

public:

    SFX_DECL_VIEWFACTORY(SwPagePreview);

    SFX_DECL_INTERFACE(SW_PAGEPREVIEW)

private:

    /// SfxInterface initializer.

    static void InitInterface_Impl();

public:

    SwViewShell* GetViewShell() const

    { return m_pViewWin->GetViewShell(); }

    void RepaintCoreRect( const SwRect& rRect )

    { m_pViewWin->RepaintCoreRect( rRect ); }

    void DocSzChgd(const Size& rNewSize);

    void SetVisArea( const tools::Rectangle& );

    void ScrollViewSzChg();

    void ScrollDocSzChg();

    void ShowHScrollbar(bool bShow);

    void ShowVScrollbar(bool bShow);

    void EnableHScrollbar(bool bEnable);

    void EnableVScrollbar(bool bEnable);

    sal_uInt16 GetPageCount() const        { return mnPageCount; }

    sal_uInt16 GetSelectedPage() const {return m_pViewWin->SelectedPage();}

    bool HandleWheelCommands( const CommandEvent& );

    const OUString& GetPrevSwViewData() const       { return m_sSwViewData; }

    void SetNewCursorPos( const OUString& rStr ) { m_sNewCursorPosition = rStr; }

    const OUString& GetNewCursorPos() const           { return m_sNewCursorPosition; }

    sal_uInt16 GetNewPage() const {return m_nNewPage;}

    // Handler

    void Execute(SfxRequest&);

    void GetState(SfxItemSet&);

    static void StateUndo(SfxItemSet&);

    SwDocShell* GetDocShell();

    // Inline method to request values of new members

    // <mbResetFormDesignMode> and <mbFormDesignModeToReset>

    bool ResetFormDesignMode() const

    {

        return mbResetFormDesignMode;

    }

    bool FormDesignModeToReset() const

    {

        return mbFormDesignModeToReset;

    }

    /** Adjust position of vertical scrollbar

        Currently used, if the complete preview layout rows fit into to the given

        window, if a new page is selected and this page is visible.

        @param _nNewThumbPos

        input parameter - new position, which will be assigned to the vertical

        scrollbar.

    */

    void SetVScrollbarThumbPos( const sal_uInt16 _nNewThumbPos );

    void PrintSettingsChanged();

    SwPagePreview(SfxViewFrame& rFrame, SfxViewShell*);

    virtual ~SwPagePreview() override;

};

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