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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/download/content/public/all_download_item_notifier.h"
#include "base/trace_event/memory_usage_estimator.h"
namespace download {
AllDownloadItemNotifier::AllDownloadItemNotifier(
content::DownloadManager* manager,
AllDownloadItemNotifier::Observer* observer)
: manager_(manager), observer_(observer) {
DCHECK(observer_);
manager_->AddObserver(this);
content::DownloadManager::DownloadVector items;
manager_->GetAllDownloads(&items);
for (content::DownloadManager::DownloadVector::const_iterator it =
items.begin();
it != items.end(); ++it) {
(*it)->AddObserver(this);
observing_.insert(*it);
}
if (manager_->IsManagerInitialized())
observer_->OnManagerInitialized(manager_);
}
AllDownloadItemNotifier::~AllDownloadItemNotifier() {
if (manager_)
manager_->RemoveObserver(this);
for (auto it = observing_.begin(); it != observing_.end(); ++it) {
(*it)->RemoveObserver(this);
}
observing_.clear();
}
size_t AllDownloadItemNotifier::EstimateMemoryUsage() const {
return base::trace_event::EstimateMemoryUsage(observing_);
}
void AllDownloadItemNotifier::OnManagerInitialized() {
observer_->OnManagerInitialized(manager_);
}
void AllDownloadItemNotifier::ManagerGoingDown(
content::DownloadManager* manager) {
DCHECK_EQ(manager_, manager);
// We might get deleted while calling `observer_->OnManagerGoingDown()`.
// If so, the destructor will remove `this` as an observer of `manager_`.
auto weak_ptr = weak_factory_.GetWeakPtr();
observer_->OnManagerGoingDown(manager);
if (!weak_ptr)
return;
manager_->RemoveObserver(this);
manager_ = nullptr;
}
void AllDownloadItemNotifier::OnDownloadCreated(
content::DownloadManager* manager,
DownloadItem* item) {
item->AddObserver(this);
observing_.insert(item);
observer_->OnDownloadCreated(manager, item);
}
void AllDownloadItemNotifier::OnDownloadUpdated(DownloadItem* item) {
observer_->OnDownloadUpdated(manager_, item);
}
void AllDownloadItemNotifier::OnDownloadOpened(DownloadItem* item) {
observer_->OnDownloadOpened(manager_, item);
}
void AllDownloadItemNotifier::OnDownloadRemoved(DownloadItem* item) {
observer_->OnDownloadRemoved(manager_, item);
}
void AllDownloadItemNotifier::OnDownloadDestroyed(DownloadItem* item) {
item->RemoveObserver(this);
observing_.erase(item);
observer_->OnDownloadDestroyed(manager_, item);
}
} // namespace download
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