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// Copyright (c) 2010 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/chromeos/offline/offline_load_service.h"
#include "base/ref_counted.h"
#include "base/singleton.h"
#include "chrome/browser/browser_thread.h"
#include "chrome/browser/tab_contents/navigation_controller.h"
#include "chrome/browser/tab_contents/tab_contents.h"
#include "chrome/browser/tab_contents/tab_util.h"
#include "chrome/common/notification_service.h"
namespace chromeos {
// A utility class that serves a singleton instance of OfflineLoadService.
// OfflineLoadSerivce itself cannot be a singleton as it implements
// RefCount interface.
class OfflineLoadServiceSingleton {
public:
chromeos::OfflineLoadService* offline_load_service() {
return offline_load_service_.get();
}
private:
friend struct DefaultSingletonTraits<OfflineLoadServiceSingleton>;
OfflineLoadServiceSingleton()
: offline_load_service_(new chromeos::OfflineLoadService()) {}
virtual ~OfflineLoadServiceSingleton() {}
scoped_refptr<chromeos::OfflineLoadService> offline_load_service_;
DISALLOW_COPY_AND_ASSIGN(OfflineLoadServiceSingleton);
};
// static
OfflineLoadService* OfflineLoadService::Get() {
return Singleton<OfflineLoadServiceSingleton>::get()->offline_load_service();
}
void OfflineLoadService::Observe(NotificationType type,
const NotificationSource& source,
const NotificationDetails& details) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
if (type.value == NotificationType::TAB_CLOSED) {
registrar_.Remove(this, NotificationType::TAB_CLOSED, source);
NavigationController* tab = Source<NavigationController>(source).ptr();
BrowserThread::PostTask(
BrowserThread::IO, FROM_HERE,
NewRunnableMethod(this,
&OfflineLoadService::RemoveTabContents,
tab->tab_contents()));
}
}
bool OfflineLoadService::ShouldProceed(int process_host_id,
int render_view_id,
const GURL& url) const {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
TabContents* tab_contents = tab_util::GetTabContentsByID(
process_host_id, render_view_id);
DCHECK(tab_contents);
bool proceed = tabs_.find(tab_contents) != tabs_.end();
DLOG(INFO) << "ShouldProceed:" << proceed << ", url=" << url.spec()
<< ", tab_contents=" << tab_contents;
return proceed;
}
void OfflineLoadService::Proceeded(int process_host_id,
int render_view_id,
const GURL& url) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
TabContents* tab_contents = tab_util::GetTabContentsByID(
process_host_id, render_view_id);
DCHECK(tab_contents);
if (tabs_.find(tab_contents) == tabs_.end()) {
DLOG(INFO) << "Proceeded: url=" << url.spec()
<< ", tab_contents=" << tab_contents;
tabs_.insert(tab_contents);
BrowserThread::PostTask(
BrowserThread::UI, FROM_HERE,
NewRunnableMethod(this,
&OfflineLoadService::RegisterNotification,
&tab_contents->controller()));
} else {
DLOG(WARNING) << "Proceeded: ignoring duplicate";
}
}
void OfflineLoadService::RemoveTabContents(TabContents* tab_contents) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
tabs_.erase(tabs_.find(tab_contents));
}
void OfflineLoadService::RegisterNotification(
NavigationController* navigation_controller) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
registrar_.Add(this, NotificationType::TAB_CLOSED,
Source<NavigationController>(
navigation_controller));
}
} // namespace chromeos
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