/******************************************************************************

Copyright (c) 1999 Microsoft Corporation

Module Name:
    HelpViewerWrapper.h

Abstract:
    This file contains the declaration of the class used to wrap the HTML Help Viewer.

Revision History:
    Davide Massarenti   (dmassare)  01/20/2000
        created

******************************************************************************/

#if !defined(__INCLUDED___PCH___HELPVIEWERWRAPPER_H___)
#define __INCLUDED___PCH___HELPVIEWERWRAPPER_H___

#include <HelpCenter.h>

#include <htmlhelp.h>

#include <oleacc.h>


#define ID_NOTIFY_FROM_HH (12345)
#define WINDOW_STYLE      "HCStyle"


class ATL_NO_VTABLE CPCHHelpViewerWrapper :
    public CComObjectRootEx<CComSingleThreadModel>,
    public CStockPropImpl                 <CPCHHelpViewerWrapper, IPCHHelpViewerWrapper, &IID_IPCHHelpViewerWrapper, &LIBID_HelpCenterTypeLib>,
    public CComControl                    <CPCHHelpViewerWrapper>,
    public IPersistStreamInitImpl         <CPCHHelpViewerWrapper>,
    public IOleControlImpl                <CPCHHelpViewerWrapper>,
    public IOleObjectImpl                 <CPCHHelpViewerWrapper>,
    public IOleInPlaceActiveObjectImpl    <CPCHHelpViewerWrapper>,
    public IViewObjectExImpl              <CPCHHelpViewerWrapper>,
    public IOleInPlaceObjectWindowlessImpl<CPCHHelpViewerWrapper>,
    public CComCoClass                    <CPCHHelpViewerWrapper, &CLSID_PCHHelpViewerWrapper>
{
    static MPC::CComSafeAutoCriticalSection s_csec;
    static bool                    			s_fInitialized;
    static DWORD                   			s_dwLastStyle;
    static MPC::WStringList        			s_lstAvailable;

    //
    // This is the OLEACC stuff used to access the WebBrowser object inside the HTMLHelp viewer.
    //
    static HINSTANCE               s_hInst;
    static LPFNOBJECTFROMLRESULT   s_pfObjectFromLresult;

    ////////////////////////////////////////

    class ATL_NO_VTABLE ServiceProvider :
        public CComObjectRootEx<CComSingleThreadModel>,
        public IServiceProvider
    {
        CPCHHelpCenterExternal* m_parent;
		HWND                    m_hWnd;

    public:
    BEGIN_COM_MAP(ServiceProvider)
        COM_INTERFACE_ENTRY(IServiceProvider)
    END_COM_MAP()

        ServiceProvider();
        virtual ~ServiceProvider();

        HRESULT Attach( /*[in]*/ CPCHHelpCenterExternal* parent, /*[in]*/ HWND hWnd );
        void    Detach(                                                             );

        //
        // IServiceProvider
        //
        STDMETHOD(QueryService)( REFGUID guidService, REFIID riid, void **ppv );
    };

    ////////////////////////////////////////

    CPCHHelpCenterExternal*          		m_parent;
	CPCHHelpViewerWrapper::ServiceProvider* m_ServiceProvider;

    bool                           	 		m_fFirstTime;
    MPC::wstring                   	 		m_szWindowStyle;
    HWND                           	 		m_hwndHH;
  		 
    CComPtr<IHTMLDocument2>        	 		m_spDoc;
    CComPtr<IWebBrowser2>          	 		m_WB2;
	CComBSTR                         		m_bstrPendingNavigation;

    ////////////////////////////////////////

    void AcquireWindowStyle();
    void ReleaseWindowStyle();
    void ExtractWebBrowser();

    void InternalDisplayTopic( /*[in]*/ LPCWSTR szURL );


public:
DECLARE_NO_REGISTRY()
DECLARE_NOT_AGGREGATABLE(CPCHHelpViewerWrapper)

DECLARE_PROTECT_FINAL_CONSTRUCT()

BEGIN_COM_MAP(CPCHHelpViewerWrapper)
    COM_INTERFACE_ENTRY(IPCHHelpViewerWrapper)
    COM_INTERFACE_ENTRY2(IDispatch, IPCHHelpViewerWrapper)
    COM_INTERFACE_ENTRY(IViewObjectEx)
    COM_INTERFACE_ENTRY(IViewObject2)
    COM_INTERFACE_ENTRY(IViewObject)
    COM_INTERFACE_ENTRY(IOleInPlaceObjectWindowless)
    COM_INTERFACE_ENTRY(IOleInPlaceObject)
    COM_INTERFACE_ENTRY2(IOleWindow, IOleInPlaceObjectWindowless)
    COM_INTERFACE_ENTRY(IOleInPlaceActiveObject)
    COM_INTERFACE_ENTRY(IOleControl)
    COM_INTERFACE_ENTRY(IOleObject)
    COM_INTERFACE_ENTRY(IPersistStreamInit)
    COM_INTERFACE_ENTRY2(IPersist, IPersistStreamInit)
END_COM_MAP()

BEGIN_PROP_MAP(CPCHHelpViewerWrapper)
END_PROP_MAP()

    CPCHHelpViewerWrapper();
    virtual ~CPCHHelpViewerWrapper();

	BOOL ProcessWindowMessage( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam, LRESULT& lResult, DWORD dwMsgMapID = 0 );

    BOOL PreTranslateAccelerator( LPMSG pMsg, HRESULT& hRet );

// IViewObjectEx
    DECLARE_VIEW_STATUS(0)

// IOleObject
    STDMETHOD(SetClientSite)(IOleClientSite *pClientSite);

// IPCHHelpViewerWrapper
public:
	STDMETHOD(get_WebBrowser)( /*[out,retval]*/ IUnknown* *pVal );

    STDMETHOD(Navigate)( /*[in]*/ BSTR bstrURL );
    STDMETHOD(Print   )(                       );
};

/////////////////////////////////////////////////////////////////////////////

#endif // !defined(__INCLUDED___PCH___HELPVIEWERWRAPPER_H___)