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