content/renderer/load_progress_tracker.h

   1 // Copyright (c) 2011 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_RENDERER_LOAD_PROGRESS_TRACKER_H_
   6 #define CONTENT_RENDERER_LOAD_PROGRESS_TRACKER_H_
   7
   8 #include "base/containers/hash_tables.h"
   9 #include "base/logging.h"
  10 #include "base/memory/weak_ptr.h"
  11 #include "base/time/time.h"
  12
  13 namespace content {
  14 class RenderViewImpl;
  15
  16 class LoadProgressTracker {
  17  public:
  18   explicit LoadProgressTracker(RenderViewImpl* render_view);
  19   ~LoadProgressTracker();
  20
  21   void DidStartLoading(int frame_routing_id);
  22   void DidStopLoading(int frame_routing_id);
  23
  24   void DidChangeLoadProgress(int frame_routing_id, double progress);
  25
  26  private:
  27   void ResetStates();
  28
  29   void SendChangeLoadProgress();
  30
  31   RenderViewImpl* render_view_;
  32
  33   // ProgressMap maps RenderFrame routing ids to a double representing that
  34   // frame's completion (from 0 to 1).
  35   typedef base::hash_map<int, double> ProgressMap;
  36   ProgressMap progresses_;
  37   double total_progress_;
  38
  39   base::TimeTicks last_time_progress_sent_;
  40
  41   base::WeakPtrFactory<LoadProgressTracker> weak_factory_;
  42
  43   DISALLOW_COPY_AND_ASSIGN(LoadProgressTracker);
  44 };
  45
  46 }  // namespace content
  47
  48 #endif  // CONTENT_RENDERER_LOAD_PROGRESS_TRACKER_H_