1// Copyright (c) 2010 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#include "chrome/browser/download/download_status_updater.h"
6
7#include "base/logging.h"
8#include "chrome/browser/download/download_status_updater_delegate.h"
9#include "chrome/browser/download/download_util.h"
10
11DownloadStatusUpdater::DownloadStatusUpdater() {
12}
13
14DownloadStatusUpdater::~DownloadStatusUpdater() {
15}
16
17void DownloadStatusUpdater::AddDelegate(
18    DownloadStatusUpdaterDelegate* delegate) {
19  delegates_.insert(delegate);
20  Update();
21}
22
23void DownloadStatusUpdater::RemoveDelegate(
24    DownloadStatusUpdaterDelegate* delegate) {
25  delegates_.erase(delegate);
26  Update();
27}
28
29void DownloadStatusUpdater::Update() {
30  float progress = 0;
31  bool progress_known = GetProgress(&progress);
32  download_util::UpdateAppIconDownloadProgress(
33      static_cast<int>(GetInProgressDownloadCount()),
34      progress_known,
35      progress);
36}
37
38bool DownloadStatusUpdater::GetProgress(float* progress) {
39  *progress = 0;
40
41  int64 received_bytes = 0;
42  int64 total_bytes = 0;
43  for (DelegateSet::iterator i = delegates_.begin();
44       i != delegates_.end(); ++i) {
45    if (!(*i)->IsDownloadProgressKnown())
46      return false;
47    received_bytes += (*i)->GetReceivedDownloadBytes();
48    total_bytes += (*i)->GetTotalDownloadBytes();
49  }
50
51  if (total_bytes > 0)
52    *progress = static_cast<float>(received_bytes) / total_bytes;
53  return true;
54}
55
56int64 DownloadStatusUpdater::GetInProgressDownloadCount() {
57  int64 download_count = 0;
58  for (DelegateSet::iterator i = delegates_.begin();
59       i != delegates_.end(); ++i) {
60    download_count += (*i)->GetInProgressDownloadCount();
61  }
62
63  return download_count;
64}
65