components/web_cache/renderer/web_cache_render_process_observer.h

   1 // Copyright 2014 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 COMPONENTS_WEB_CACHE_RENDERER_WEB_CACHE_RENDER_PROCESS_OBSERVER_H_
   6 #define COMPONENTS_WEB_CACHE_RENDERER_WEB_CACHE_RENDER_PROCESS_OBSERVER_H_
   7
   8 #include "base/compiler_specific.h"
   9 #include "base/macros.h"
  10 #include "content/public/renderer/render_process_observer.h"
  11
  12 namespace web_cache {
  13
  14 // This class filters the incoming cache related control messages.
  15 class WebCacheRenderProcessObserver : public content::RenderProcessObserver {
  16  public:
  17   WebCacheRenderProcessObserver();
  18   ~WebCacheRenderProcessObserver() override;
  19
  20   // Needs to be called by RenderViews in case of navigations to execute
  21   // any 'clear cache' commands that were delayed until the next navigation.
  22   void ExecutePendingClearCache();
  23
  24  private:
  25   // RenderProcessObserver implementation.
  26   bool OnControlMessageReceived(const IPC::Message& message) override;
  27   void WebKitInitialized() override;
  28   void OnRenderProcessShutdown() override;
  29
  30   // Message handlers.
  31   void OnSetCacheCapacities(size_t min_dead_capacity,
  32                             size_t max_dead_capacity,
  33                             size_t capacity);
  34   // If |on_navigation| is true, the clearing is delayed until the next
  35   // navigation event.
  36   void OnClearCache(bool on_navigation);
  37
  38   // If true, the web cache shall be cleared before the next navigation event.
  39   bool clear_cache_pending_;
  40   bool webkit_initialized_;
  41   size_t pending_cache_min_dead_capacity_;
  42   size_t pending_cache_max_dead_capacity_;
  43   size_t pending_cache_capacity_;
  44
  45   DISALLOW_COPY_AND_ASSIGN(WebCacheRenderProcessObserver);
  46 };
  47
  48 }  // namespace web_cache
  49
  50 #endif  // COMPONENTS_WEB_CACHE_RENDERER_WEB_CACHE_RENDER_PROCESS_OBSERVER_H_
  51