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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/download/download_status_updater.h"
#include <vector>
#include "base/logging.h"
#include "base/stl_util.h"
#include "chrome/browser/download/download_util.h"
namespace {
// DownloadStatusUpdater::UpdateAppIconDownloadProgress() expects to only be
// called once when a DownloadItem completes, then not again (except perhaps
// until it is resumed). The existence of WasInProgressData is effectively a
// boolean that indicates whether that final UpdateAppIconDownloadProgress()
// call has been made for a given DownloadItem. It is expected that there will
// be many more non-in-progress downloads than in-progress downloads, so
// WasInProgressData is set for in-progress downloads and cleared from
// non-in-progress downloads instead of the other way around in order to save
// memory.
class WasInProgressData : public base::SupportsUserData::Data {
public:
static bool Get(content::DownloadItem* item) {
return item->GetUserData(kKey) != NULL;
}
static void Clear(content::DownloadItem* item) {
item->RemoveUserData(kKey);
}
explicit WasInProgressData(content::DownloadItem* item) {
item->SetUserData(kKey, this);
}
private:
static const char kKey[];
DISALLOW_COPY_AND_ASSIGN(WasInProgressData);
};
const char WasInProgressData::kKey[] =
"DownloadItem DownloadStatusUpdater WasInProgressData";
} // anonymous namespace
DownloadStatusUpdater::DownloadStatusUpdater() {
}
DownloadStatusUpdater::~DownloadStatusUpdater() {
STLDeleteElements(¬ifiers_);
}
bool DownloadStatusUpdater::GetProgress(float* progress,
int* download_count) const {
*progress = 0;
*download_count = 0;
bool progress_certain = true;
int64 received_bytes = 0;
int64 total_bytes = 0;
for (std::vector<AllDownloadItemNotifier*>::const_iterator it =
notifiers_.begin(); it != notifiers_.end(); ++it) {
if ((*it)->GetManager()) {
content::DownloadManager::DownloadVector items;
(*it)->GetManager()->GetAllDownloads(&items);
for (content::DownloadManager::DownloadVector::const_iterator it =
items.begin(); it != items.end(); ++it) {
if ((*it)->IsInProgress()) {
++*download_count;
if ((*it)->GetTotalBytes() <= 0) {
// There may or may not be more data coming down this pipe.
progress_certain = false;
} else {
received_bytes += (*it)->GetReceivedBytes();
total_bytes += (*it)->GetTotalBytes();
}
}
}
}
}
if (total_bytes > 0)
*progress = static_cast<float>(received_bytes) / total_bytes;
return progress_certain;
}
void DownloadStatusUpdater::AddManager(content::DownloadManager* manager) {
notifiers_.push_back(new AllDownloadItemNotifier(manager, this));
content::DownloadManager::DownloadVector items;
manager->GetAllDownloads(&items);
for (content::DownloadManager::DownloadVector::const_iterator
it = items.begin(); it != items.end(); ++it) {
OnDownloadCreated(manager, *it);
}
}
void DownloadStatusUpdater::OnDownloadCreated(
content::DownloadManager* manager, content::DownloadItem* item) {
// Ignore downloads loaded from history, which are in a terminal state.
// TODO(benjhayden): Use the Observer interface to distinguish between
// historical and started downloads.
if (item->IsInProgress()) {
UpdateAppIconDownloadProgress(item);
new WasInProgressData(item);
}
// else, the lack of WasInProgressData indicates to OnDownloadUpdated that it
// should not call UpdateAppIconDownloadProgress().
}
void DownloadStatusUpdater::OnDownloadUpdated(
content::DownloadManager* manager, content::DownloadItem* item) {
if (item->IsInProgress()) {
// If the item was interrupted/cancelled and then resumed/restarted, then
// set WasInProgress so that UpdateAppIconDownloadProgress() will be called
// when it completes.
if (!WasInProgressData::Get(item))
new WasInProgressData(item);
} else {
// The item is now in a terminal state. If it was already in a terminal
// state, then do not call UpdateAppIconDownloadProgress() again. If it is
// now transitioning to a terminal state, then clear its WasInProgressData
// so that UpdateAppIconDownloadProgress() won't be called after this final
// call.
if (!WasInProgressData::Get(item))
return;
WasInProgressData::Clear(item);
}
UpdateAppIconDownloadProgress(item);
}
#if defined(USE_AURA) || defined(OS_ANDROID)
void DownloadStatusUpdater::UpdateAppIconDownloadProgress(
content::DownloadItem* download) {
// TODO(davemoore): Implement once UX for aura download is decided <104742>
// TODO(avi): Implement for Android?
}
#endif
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