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 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  13 #pragma implementation "helpbest.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #ifdef __BORLANDC__
  20 #pragma hdrstop
  21 #endif
  22
  23 #ifndef WX_PRECOMP
  24 #include "wx/defs.h"
  25 #endif
  26
  27 #include "wx/filefn.h"
  28 #include "wx/log.h"
  29
  30 #if wxUSE_HELP && wxUSE_MS_HTML_HELP && defined(__WIN95__) \
  31     && wxUSE_WXHTML_HELP && !defined(__WXUNIVERSAL__)
  32
  33 #include "wx/msw/helpchm.h"
  34 #include "wx/html/helpctrl.h"
  35 #include "wx/msw/helpbest.h"
  36
  37 IMPLEMENT_DYNAMIC_CLASS( wxBestHelpController, wxHelpControllerBase )
  38
  39 bool wxBestHelpController::Initialize( const wxString& filename )
  40 {
  41     // try wxCHMHelpController
  42     wxCHMHelpController* chm = new wxCHMHelpController;
  43
  44     m_helpControllerType = wxUseChmHelp;
  45     // do not warn upon failure
  46     wxLogNull dontWarnOnFailure;
  47
  48     if( chm->Initialize( GetValidFilename( filename ) ) )
  49     {
  50         m_helpController = chm;
  51         return true;
  52     }
  53
  54     // failed
  55     delete chm;
  56
  57     // try wxHtmlHelpController
  58     wxHtmlHelpController* html = new wxHtmlHelpController;
  59
  60     m_helpControllerType = wxUseHtmlHelp;
  61     if( html->Initialize( GetValidFilename( filename ) ) )
  62     {
  63         m_helpController = html;
  64         return true;
  65     }
  66
  67     // failed
  68     delete html;
  69
  70     return false;
  71 }
  72
  73 wxString wxBestHelpController::GetValidFilename( const wxString& filename ) const
  74 {
  75     wxString tmp = filename;
  76     ::wxStripExtension( tmp );
  77
  78     switch( m_helpControllerType )
  79     {
  80         case wxUseChmHelp:
  81             if( ::wxFileExists( tmp + wxT(".chm") ) )
  82                 return tmp + wxT(".chm");
  83
  84             return filename;
  85
  86         case wxUseHtmlHelp:
  87             if( ::wxFileExists( tmp + wxT(".htb") ) )
  88                 return tmp + wxT(".htb");
  89             if( ::wxFileExists( tmp + wxT(".zip") ) )
  90                 return tmp + wxT(".zip");
  91             if( ::wxFileExists( tmp + wxT(".hhp") ) )
  92                 return tmp + wxT(".hhp");
  93
  94             return filename;
  95
  96         default:
  97             // we CAN'T get here
  98             wxFAIL_MSG( wxT("wxBestHelpController: Must call Initialize, first!") );
  99     }
 100
 101     return wxEmptyString;
 102 }
 103
 104 #endif
 105     // wxUSE_HELP && wxUSE_MS_HTML_HELP && defined(__WIN95__) && wxUSE_WXHTML_HELP