src/generic/helpext.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        helpext.cpp
   3 // Purpose:     an external help controller for wxWindows
   4 // Author:      Karsten Ballueder
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Karsten Ballueder
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #   pragma implementation "wxexthlp.h"
  14 #endif
  15
  16 #include "wx/wxprec.h"
  17
  18 #ifdef __BORLANDC__
  19     #pragma hdrstop
  20 #endif
  21
  22 #if wxUSE_HELP
  23
  24 #ifndef WX_PRECOMP
  25     #include "wx/setup.h"
  26     #include "wx/string.h"
  27     #include "wx/utils.h"
  28     #include "wx/list.h"
  29     #include "wx/intl.h"
  30 #endif
  31
  32 #include "wx/helpbase.h"
  33 #include "wx/generic/helpext.h"
  34
  35 #include <stdio.h>
  36 #include <ctype.h>
  37 #include <sys/stat.h>
  38
  39 #ifndef __WINDOWS__
  40     #include   <unistd.h>
  41 #endif
  42
  43 IMPLEMENT_CLASS(wxExtHelpController, wxHTMLHelpControllerBase)
  44
  45 /**
  46    This class implements help via an external browser.
  47    It requires the name of a directory containing the documentation
  48    and a file mapping numerical Section numbers to relative URLS.
  49 */
  50
  51 wxExtHelpController::wxExtHelpController(void)
  52 {
  53    m_BrowserName = WXEXTHELP_DEFAULTBROWSER;
  54    m_BrowserIsNetscape = WXEXTHELP_DEFAULTBROWSER_IS_NETSCAPE;
  55
  56    char *browser = getenv(WXEXTHELP_ENVVAR_BROWSER);
  57    if(browser)
  58    {
  59       m_BrowserName = browser;
  60       browser = getenv(WXEXTHELP_ENVVAR_BROWSERISNETSCAPE);
  61       m_BrowserIsNetscape = browser && (atoi(browser) != 0);
  62    }
  63 }
  64
  65
  66 void
  67 wxExtHelpController::SetBrowser(wxString const & browsername, bool isNetscape)
  68 {
  69    m_BrowserName = browsername;
  70    m_BrowserIsNetscape = isNetscape;
  71 }
  72
  73 // Set viewer: new, generic name for SetBrowser
  74 void wxExtHelpController::SetViewer(const wxString& viewer, long flags)
  75 {
  76     SetBrowser(viewer, ((flags & wxHELP_NETSCAPE) == wxHELP_NETSCAPE));
  77 }
  78
  79 bool
  80 wxExtHelpController::DisplayHelp(wxString const &relativeURL)
  81 {
  82    wxBusyCursor b; // display a busy cursor
  83
  84
  85 #ifdef __WXMSW__
  86    wxString url;
  87    url << m_MapFile << '\\' << relativeURL.BeforeFirst('#');
  88    bool bOk = (int)ShellExecute(NULL, "open", url,
  89                                 NULL, NULL, SW_SHOWNORMAL ) > 32;
  90    if ( !bOk )
  91    {
  92       wxLogSysError(_("Cannot open URL '%s'"), relativeURL.c_str());
  93       return false;
  94    }
  95    else
  96       return true;
  97 #else
  98    // assume UNIX
  99    wxString command;
 100
 101    if(m_BrowserIsNetscape) // try re-loading first
 102    {
 103       wxString lockfile;
 104       wxGetHomeDir(&lockfile);
 105       lockfile << WXEXTHELP_SEPARATOR << _T(".netscape/lock");
 106       struct stat statbuf;
 107       if(lstat(lockfile.fn_str(), &statbuf) == 0)
 108       // cannot use wxFileExists, because it's a link pointing to a
 109       // non-existing location      if(wxFileExists(lockfile))
 110       {
 111          long success;
 112          command << m_BrowserName << _T(" -remote openURL(")
 113                  << _T("file://") << m_MapFile
 114                  << WXEXTHELP_SEPARATOR << relativeURL << _T(")");
 115          success = wxExecute(command);
 116          if(success != 0 ) // returns PID on success
 117             return TRUE;
 118       }
 119    }
 120    command = m_BrowserName;
 121    command << _T(" file://")
 122            << m_MapFile << WXEXTHELP_SEPARATOR << relativeURL;
 123    return wxExecute(command) != 0;
 124 #endif
 125 }
 126
 127 #endif // wxUSE_HELP
 128