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 #ifdef __GNUG__
  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__) && wxUSE_WXHTML_HELP
  31 #include "wx/msw/helpchm.h"
  32 #include "wx/html/helpctrl.h"
  33 #include "wx/msw/helpbest.h"
  34
  35 IMPLEMENT_DYNAMIC_CLASS( wxBestHelpController, wxHelpControllerBase );
  36
  37 bool wxBestHelpController::Initialize( const wxString& filename )
  38 {
  39     // try wxCHMHelpController
  40     wxCHMHelpController* chm = new wxCHMHelpController;
  41
  42     m_helpControllerType = wxUseChmHelp;
  43     // do not warn upon failure
  44     wxLogNull dontWarnOnFailure;
  45
  46     if( chm->Initialize( GetValidFilename( filename ) ) )
  47     {
  48         m_helpController = chm;
  49         return TRUE;
  50     }
  51
  52     // failed
  53     delete chm;
  54
  55     // try wxHtmlHelpController
  56     wxHtmlHelpController* html = new wxHtmlHelpController;
  57
  58     m_helpControllerType = wxUseHtmlHelp;
  59     if( html->Initialize( GetValidFilename( filename ) ) )
  60     {
  61         m_helpController = html;
  62         return TRUE;
  63     }
  64
  65     // failed
  66     delete html;
  67
  68     return FALSE;
  69 }
  70
  71 wxString wxBestHelpController::GetValidFilename( const wxString& filename ) const
  72 {
  73     wxString tmp = filename;
  74     ::wxStripExtension( tmp );
  75
  76     switch( m_helpControllerType )
  77     {
  78         case wxUseChmHelp:
  79             if( ::wxFileExists( tmp + ".chm" ) )
  80                 return tmp + ".chm";
  81
  82             return filename;
  83
  84         case wxUseHtmlHelp:
  85             if( ::wxFileExists( tmp + ".htb" ) )
  86                 return tmp + ".htb";
  87             if( ::wxFileExists( tmp + ".zip" ) )
  88                 return tmp + ".zip";
  89             if( ::wxFileExists( tmp + ".hhp" ) )
  90                 return tmp + ".hhp";
  91
  92             return filename;
  93
  94         default:
  95             // we CAN'T get here
  96             wxFAIL_MSG( wxT("wxBestHelpController: Must call Initialize, first!") );
  97     }
  98
  99     return wxEmptyString;
 100 }
 101
 102 #endif
 103     // wxUSE_HELP && wxUSE_MS_HTML_HELP && defined(__WIN95__) && wxUSE_WXHTML_HELP