src/msw/helpbest.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        helpbest.cpp
   3 // Purpose:     Tries to load MS HTML Help, falls back to wxHTML upon failure
   4 // Author:      Mattia Barbon
   5 // Modified by:
   6 // Created:     02/04/2001
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Mattia Barbon
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #ifdef __BORLANDC__
  16 #pragma hdrstop
  17 #endif
  18
  19 #ifndef WX_PRECOMP
  20 #include "wx/defs.h"
  21 #endif
  22
  23 #include "wx/filefn.h"
  24 #include "wx/log.h"
  25
  26 #if wxUSE_HELP && wxUSE_MS_HTML_HELP && defined(__WIN95__) \
  27     && wxUSE_WXHTML_HELP && !defined(__WXUNIVERSAL__)
  28
  29 #include "wx/msw/helpchm.h"
  30 #include "wx/html/helpctrl.h"
  31 #include "wx/msw/helpbest.h"
  32
  33 IMPLEMENT_DYNAMIC_CLASS( wxBestHelpController, wxHelpControllerBase )
  34
  35 bool wxBestHelpController::Initialize( const wxString& filename )
  36 {
  37     // try wxCHMHelpController
  38     wxCHMHelpController* chm = new wxCHMHelpController;
  39
  40     m_helpControllerType = wxUseChmHelp;
  41     // do not warn upon failure
  42     wxLogNull dontWarnOnFailure;
  43
  44     if( chm->Initialize( GetValidFilename( filename ) ) )
  45     {
  46         m_helpController = chm;
  47         return true;
  48     }
  49
  50     // failed
  51     delete chm;
  52
  53     // try wxHtmlHelpController
  54     wxHtmlHelpController* html = new wxHtmlHelpController;
  55
  56     m_helpControllerType = wxUseHtmlHelp;
  57     if( html->Initialize( GetValidFilename( filename ) ) )
  58     {
  59         m_helpController = html;
  60         return true;
  61     }
  62
  63     // failed
  64     delete html;
  65
  66     return false;
  67 }
  68
  69 wxString wxBestHelpController::GetValidFilename( const wxString& filename ) const
  70 {
  71     wxString tmp = filename;
  72     ::wxStripExtension( tmp );
  73
  74     switch( m_helpControllerType )
  75     {
  76         case wxUseChmHelp:
  77             if( ::wxFileExists( tmp + wxT(".chm") ) )
  78                 return tmp + wxT(".chm");
  79
  80             return filename;
  81
  82         case wxUseHtmlHelp:
  83             if( ::wxFileExists( tmp + wxT(".htb") ) )
  84                 return tmp + wxT(".htb");
  85             if( ::wxFileExists( tmp + wxT(".zip") ) )
  86                 return tmp + wxT(".zip");
  87             if( ::wxFileExists( tmp + wxT(".hhp") ) )
  88                 return tmp + wxT(".hhp");
  89
  90             return filename;
  91
  92         default:
  93             // we CAN'T get here
  94             wxFAIL_MSG( wxT("wxBestHelpController: Must call Initialize, first!") );
  95     }
  96
  97     return wxEmptyString;
  98 }
  99
 100 #endif
 101     // wxUSE_HELP && wxUSE_MS_HTML_HELP && defined(__WIN95__) && wxUSE_WXHTML_HELP