//----------------------------------------------------------------------------
// ObjectWindows
// Copyright (c) 1995, 1996 by Borland International, All Rights Reserved
//
/// \file
/// Declares THelpContext and THelpFileManager.
//----------------------------------------------------------------------------
 
#if !defined(OWL_HLPMANAG_H)
#define OWL_HLPMANAG_H
 
#include <owl/private/defs.h>
#if defined(BI_HAS_PRAGMA_ONCE)
# pragma once
#endif
 
#include <owl/window.h>
#include <htmlhelp.h>
 
namespace owl {
 
class _OWLCLASS THelpContext;
class _OWLCLASS TWindow;
 
/// \cond NoSuppressDoxygenWarning
#include <owl/preclass.h>
/// \endcond
 
 
// moved from owl/signatur.h
 
struct THelpHitInfo
{
  THelpHitInfo(const TPoint& pt, TWindow* wnd):Point(pt),Window(wnd){}
  THelpHitInfo(int x,int y, TWindow* wnd):Point(x,y),Window(wnd){}
 
  TPoint     Point;
  TWindow*  Window;
};
 
 
class _OWLCLASS THlpNotify : public HHN_NOTIFY{
  public:
    THlpNotify(){}
 
    operator  NMHDR&() { return hdr; }
};
 
class _OWLCLASS THlpPopup : public  HH_POPUP {
  public:
    THlpPopup(uint id = 0);
};
 
class _OWLCLASS THlpAklink : public  HH_AKLINK {
  public:
    THlpAklink()
      {
        ZeroMemory(this,sizeof(HH_AKLINK));
        cbStruct = sizeof(HH_AKLINK);
       }
};
 
class _OWLCLASS THlpEnumIt : public  HH_ENUM_IT {
  public:
    THlpEnumIt()
      {
        ZeroMemory(this,sizeof(HH_ENUM_IT));
        cbStruct = sizeof(HH_ENUM_IT);
       }
};
 
class _OWLCLASS THlpSetInfoType : public  HH_SET_INFOTYPE {
  public:
    THlpSetInfoType()
      {
        ZeroMemory(this,sizeof(HH_SET_INFOTYPE));
        cbStruct = sizeof(HH_SET_INFOTYPE);
       }
};
 
class _OWLCLASS THlpFtsQuery : public  HH_FTS_QUERY {
  public:
    THlpFtsQuery()
      {
        ZeroMemory(this,sizeof(HH_FTS_QUERY));
        cbStruct = sizeof(HH_FTS_QUERY);
       }
};
 
class _OWLCLASS THlpWinType : public  HH_WINTYPE {
  public:
    THlpWinType()
      {
        ZeroMemory(this,sizeof(HH_WINTYPE));
        cbStruct = sizeof(HH_WINTYPE);
       }
    void SetStyle(int style);
    void SetProperties(int prop);
    void SetToolBarFlags(int flags);
    void SetWindowsPos(const TRect& rect);
};
 
class _OWLCLASS THlpTrack : public  HHNTRACK {
  public:
    THlpTrack(){}
 
    operator  NMHDR&() { return hdr; }
};
 
//
/// \class THelpContext
// ~~~~~ ~~~~~~~~~~~~
/// THelpContext is a class that maintains information about a menu item id and
/// a child control id with a help context id.
/// As particular windows get and lose focus, their context tables are removed
/// from a global context table.
//
class _OWLCLASS THelpContext {
  public:
    THelpContext();
    THelpContext(TWindow* window, int helpId, int menuId, int controlId);
    THelpContext(const THelpContext&);
   ~THelpContext();
 
    THelpContext& operator =(const THelpContext&);
    bool operator ==(const THelpContext&) const;
    // not implemented just to make happy STL
    bool operator <(const THelpContext&) const;
 
    int GetHelpFileContextId() const;
    int GetMenuContextId() const;
    int GetControlContextId() const;
    TWindow* GetWindow() const;
    void SetWindow(TWindow* window);
 
  private:
    TWindow* Window;
    int HelpFileContextId;
    int MenuContextId;
    int ControlContextId;
};
 
// Forward declarations
template <class T> class TBaseList;
template<class T> class TBaseListIterator;
 
//
/// \class THelpFileManager
// ~~~~~ ~~~~~~~~~~~~~~~~
/// THelpFileManager, which is designed to be a mix-in for TApplication, uses the
/// global context table. THelpFileManager looks for the WM_HELP message and calls
/// the help file with the associated context ID.
/// \todo HTMLHelp should be by default, and discourage using old WinHelp files
/// as they are not well supported under Windows Vista and later.
//
class _OWLCLASS THelpFileManager : virtual public TEventHandler {
  public:
DECLARE_CASTABLE;
    THelpFileManager(const tstring& helpFileName);
    virtual ~THelpFileManager();
 
    virtual void ActivateHelp(TWindow*, int helpFileContextId, uint hlpCmd = HELP_CONTEXT);
    virtual void DeactivateHelp();
 
    void         SetHelpFile(const tstring& helpFileName);
    tstring   GetHelpFile() const;
 
    bool     GetHelpContextFromControl(THelpContext&, int controlId, HWND ctrl) const;
    bool     GetHelpContextFromMenu(THelpContext&, int menuId) const;
 
    void     AddContextInfo(TWindow*, int helpId, int menuId, int controlId);
    void     RemoveContextInfo(TWindow*);
 
  protected:
    virtual bool  ProcessHelpMsg (MSG& msg);
    virtual void  SetHelpCursor();
 
    void   EvHelp(const HELPINFO&);
    void   EvHelpHit(const THelpHitInfo&);
 
    void  CmContextHelp ();
    void   CeContextHelp (TCommandEnabler& ce);
    void   CmWhatIsThis();
 
    //  not finished wil be changed ???????????????
  public:
    HWND   HtmlHelp(TWindow*, LPCTSTR lpszHelp, uint hlpCmd, DWORD_PTR data);
 
    HWND HtmlHelp(TWindow* w, const tstring& helpFile, uint hlpCmd, DWORD_PTR data)
    {return HtmlHelp(w, helpFile.c_str(), hlpCmd, data);}
 
    void  TranslateWinToHTML(bool translate) { WinToHTML = translate;}
 
  protected:
    bool   UseHTMLHelp;
    bool   WinToHTML;
 
  protected:
    typedef TBaseList<THelpContext>          TContextList;
    typedef TBaseListIterator<THelpContext> TContextListIterator;
    TContextList* ContextTable;
 
    tstring   HelpFileName;
    TCursor*     HelpCursor;
 
     bool         ContextHelp;
    bool         HelpState;
 
    TPoint      LastHit;
    TWindow*    LastParent;
 
  DECLARE_RESPONSE_TABLE(THelpFileManager);
};
 
/// \class THtmlHelpDll
// ~~~~~ ~~~~~~~~~~~~
/// Wrapper for the HHCTRL.OCX itself
class _OWLCLASS THtmlHelpDll : public TModule {
  public:
    THtmlHelpDll();
 
    TModuleProc0<HRESULT> DllCanUnloadNow;
    TModuleProc3<HRESULT,REFCLSID,REFIID,void**>   DllGetClassObject;
    TModuleProc4<HWND,HWND,LPCTSTR,uint,DWORD_PTR>   HtmlHelp;
};
 
//
/// Loader for the HHCTRL.OCX
typedef _OWLCLASS TDllLoader<THtmlHelpDll> THtmlHelp;
 
#if defined(_OWLDLL) || defined(BI_APP_DLL)
  //
  /// Export template of TDllLoader<THtmlHelpDll> when building ObjectWindows
  /// DLL and provide import declaration of DLL instance for users of the class.
  //
  template class _OWLCLASS TDllLoader<THtmlHelpDll>;
#endif
 
/// \cond NoSuppressDoxygenWarning
#include <owl/posclass.h>
/// \endcond
 
//----------------------------------------------------------------------------
// Macros to simplify usage of THelpContext
//
 
#define DECLARE_HELPCONTEXT(cls)               \
    static THelpContext __hcEntries[]
 
#define DEFINE_HELPCONTEXT(cls)\
  THelpContext cls::__hcEntries[] = {
 
#define END_HELPCONTEXT        \
    THelpContext(0, 0, 0, 0)   \
  }
 
#define HCENTRY_MENU(hcId, menuId)                    \
  THelpContext(0, hcId, menuId, 0)
 
#define HCENTRY_CONTROL(hcId, ctlId)                  \
  THelpContext(0, hcId, 0, ctlId)
 
#define HCENTRY_MENU_AND_CONTROL(hcId, menuId, ctlId) \
  THelpContext(0, hcId, menuId, ctlId)
 
#define SETUP_HELPCONTEXT(appCls, cls)                                  \
  {                                                                     \
    appCls* app = TYPESAFE_DOWNCAST(GetApplication(), appCls);          \
    if (app) {                                                          \
      for (THelpContext* hc = &__hcEntries[0]; !IsLastIndirectContext(*hc); hc++) { \
        app->AddContextInfo(this,                                       \
                            hc->GetHelpFileContextId(),                 \
                            hc->GetMenuContextId(),                     \
                            hc->GetControlContextId());                 \
      }                                                                 \
    }                                                                   \
  }
 
#define CLEANUP_HELPCONTEXT(appCls, cls)                          \
  {                                                               \
    appCls* app = TYPESAFE_DOWNCAST(GetApplication(), appCls);    \
    if (app)                                                      \
      app->RemoveContextInfo(this);                               \
  }
 
const int TablePtr = -1;
 
//----------------------------------------------------------------------------
// Inline implementations
//
 
//
/// Return true if the context entry is a pointer to another table.
//
inline bool
IsIndirectHelpContext(const THelpContext& context)
{
  if (context.GetMenuContextId() == TablePtr &&
      context.GetHelpFileContextId() == TablePtr &&
      context.GetControlContextId() == TablePtr)
    return true;
  return false;
}
 
//
/// Return true if this entry is the last entry.
//
inline bool
IsLastIndirectContext(const THelpContext& context)
{
  if (context.GetMenuContextId() == 0 &&
      context.GetHelpFileContextId() == 0 &&
      context.GetControlContextId() == 0)
    return true;
  return false;
}
 
//
/// Returns the name of the help file.
//
inline tstring
THelpFileManager::GetHelpFile() const
{
  return HelpFileName;
}
 
//
//
//
inline void
THelpFileManager::EvHelpHit(const THelpHitInfo& hit)
{
  LastHit      = hit.Point;
  LastParent  = hit.Window;
}
 
//
/// Returns the help file context id for the context entry.
//
inline int
THelpContext::GetHelpFileContextId() const
{
  return HelpFileContextId;
}
 
//
/// Returns the menu id for this context entry.
//
inline int
THelpContext::GetMenuContextId() const
{
  return MenuContextId;
}
 
//
/// Returns the child control id for this context entry.
//
inline int
THelpContext::GetControlContextId() const
{
  return ControlContextId;
}
 
//
/// Returns the window this entry is associated with.
//
inline TWindow*
THelpContext::GetWindow() const
{
  return Window;
}
 
//
/// Sets the window for this context entry.
//
inline void
THelpContext::SetWindow(TWindow* window)
{
  Window = window;
}
 
 
} // OWL namespace
 
 
#endif  // OWL_HLPMANAG_H