include/wx/private/fswatcher.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/private/fswatcher.h
   3 // Purpose:     File system watcher impl classes
   4 // Author:      Bartosz Bekier
   5 // Created:     2009-05-26
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) 2009 Bartosz Bekier <bartosz.bekier@gmail.com>
   8 // Licence:     wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11 #ifndef WX_PRIVATE_FSWATCHER_H_
  12 #define WX_PRIVATE_FSWATCHER_H_
  13
  14 #include "wx/sharedptr.h"
  15
  16 #ifdef wxHAS_INOTIFY
  17     class wxFSWatchEntryUnix;
  18     #define wxFSWatchEntry wxFSWatchEntryUnix
  19     WX_DECLARE_STRING_HASH_MAP(wxSharedPtr<wxFSWatchEntry>,wxFSWatchEntries);
  20     #include "wx/unix/private/fswatcher_inotify.h"
  21 #elif defined(wxHAS_KQUEUE)
  22     class wxFSWatchEntryKq;
  23     #define wxFSWatchEntry wxFSWatchEntryKq
  24     WX_DECLARE_STRING_HASH_MAP(wxSharedPtr<wxFSWatchEntry>,wxFSWatchEntries);
  25     #include "wx/unix/private/fswatcher_kqueue.h"
  26 #elif defined(__WXMSW__)
  27     class wxFSWatchEntryMSW;
  28     #define wxFSWatchEntry wxFSWatchEntryMSW
  29     WX_DECLARE_STRING_HASH_MAP(wxSharedPtr<wxFSWatchEntry>,wxFSWatchEntries);
  30     #include "wx/msw/private/fswatcher.h"
  31 #else
  32     #define wxFSWatchEntry wxFSWatchEntryPolling
  33 #endif
  34
  35 class wxFSWatcherImpl
  36 {
  37 public:
  38     wxFSWatcherImpl(wxFileSystemWatcherBase* watcher) :
  39         m_watcher(watcher)
  40     {
  41     }
  42
  43     virtual ~wxFSWatcherImpl()
  44     {
  45         (void) RemoveAll();
  46     }
  47
  48     virtual bool Init() = 0;
  49
  50     virtual bool Add(const wxFSWatchInfo& winfo)
  51     {
  52         wxCHECK_MSG( m_watches.find(winfo.GetPath()) == m_watches.end(), false,
  53                      "Path '%s' is already watched");
  54
  55         // construct watch entry
  56         wxSharedPtr<wxFSWatchEntry> watch(new wxFSWatchEntry(winfo));
  57
  58         if (!DoAdd(watch))
  59             return false;
  60
  61         // add watch to our map (always succeedes, checked above)
  62         wxFSWatchEntries::value_type val(watch->GetPath(), watch);
  63         return m_watches.insert(val).second;
  64     }
  65
  66     virtual bool Remove(const wxFSWatchInfo& winfo)
  67     {
  68         wxFSWatchEntries::iterator it = m_watches.find(winfo.GetPath());
  69         wxCHECK_MSG( it != m_watches.end(), false, "Path '%s' is not watched");
  70
  71         wxSharedPtr<wxFSWatchEntry> watch = it->second;
  72         m_watches.erase(it);
  73         return DoRemove(watch);
  74     }
  75
  76     virtual bool RemoveAll()
  77     {
  78         m_watches.clear();
  79         return true;
  80     }
  81
  82 protected:
  83     virtual bool DoAdd(wxSharedPtr<wxFSWatchEntry> watch) = 0;
  84
  85     virtual bool DoRemove(wxSharedPtr<wxFSWatchEntry> watch) = 0;
  86
  87     wxFSWatchEntries m_watches;
  88     wxFileSystemWatcherBase* m_watcher;
  89 };
  90
  91
  92 #endif /* WX_PRIVATE_FSWATCHER_H_ */