content/common/font_cache_dispatcher_win.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CONTENT_COMMON_FONT_CACHE_DISPATCHER_WIN_H_
   6 #define CONTENT_COMMON_FONT_CACHE_DISPATCHER_WIN_H_
   7
   8 #include <windows.h>
   9
  10 #include "base/basictypes.h"
  11 #include "base/memory/singleton.h"
  12 #include "ipc/ipc_sender.h"
  13 #include "ipc/message_filter.h"
  14
  15 namespace content {
  16
  17 // Dispatches messages used for font caching on Windows. This is needed because
  18 // Windows can't load fonts into its kernel cache in sandboxed processes. So the
  19 // sandboxed process asks the browser process to do this for it.
  20 class FontCacheDispatcher : public IPC::MessageFilter, public IPC::Sender {
  21  public:
  22   FontCacheDispatcher();
  23   virtual ~FontCacheDispatcher();
  24
  25   // IPC::Sender implementation:
  26   virtual bool Send(IPC::Message* message) OVERRIDE;
  27
  28  private:
  29   // IPC::MessageFilter implementation:
  30   virtual void OnFilterAdded(IPC::Sender* sender) OVERRIDE;
  31   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
  32   virtual void OnChannelClosing() OVERRIDE;
  33
  34   // Message handlers.
  35   void OnPreCacheFont(const LOGFONT& font);
  36   void OnReleaseCachedFonts();
  37
  38   IPC::Sender* sender_;
  39
  40   DISALLOW_COPY_AND_ASSIGN(FontCacheDispatcher);
  41 };
  42
  43 }  // namespace content
  44
  45 #endif  // CONTENT_COMMON_FONT_CACHE_DISPATCHER_WIN_H_