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// Copyright (c) 2011 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/plugin_data_remover_helper.h"
#include <string>
#include "base/memory/ref_counted.h"
#include "chrome/browser/plugin_data_remover.h"
#include "chrome/browser/prefs/pref_service.h"
#include "chrome/browser/profiles/profile.h"
#include "content/browser/browser_thread.h"
#include "content/common/notification_service.h"
// The internal class is refcounted so it can outlive PluginDataRemoverHelper.
class PluginDataRemoverHelper::Internal
: public base::RefCountedThreadSafe<PluginDataRemoverHelper::Internal> {
public:
explicit Internal(const char* pref_name, PrefService* prefs)
: pref_name_(pref_name), prefs_(prefs) {}
void StartUpdate() {
BrowserThread::PostTask(
BrowserThread::FILE,
FROM_HERE,
NewRunnableMethod(
this,
&PluginDataRemoverHelper::Internal::UpdateOnFileThread));
}
void Invalidate() {
prefs_ = NULL;
}
private:
friend class base::RefCountedThreadSafe<Internal>;
~Internal() {}
void UpdateOnFileThread() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
bool result = PluginDataRemover::IsSupported();
BrowserThread::PostTask(
BrowserThread::UI,
FROM_HERE,
NewRunnableMethod(this,
&PluginDataRemoverHelper::Internal::SetPrefOnUIThread,
result));
}
void SetPrefOnUIThread(bool value) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
if (prefs_)
prefs_->SetBoolean(pref_name_.c_str(), value);
}
std::string pref_name_;
// Weak pointer.
PrefService* prefs_;
DISALLOW_COPY_AND_ASSIGN(Internal);
};
PluginDataRemoverHelper::PluginDataRemoverHelper() {}
PluginDataRemoverHelper::~PluginDataRemoverHelper() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
if (internal_)
internal_->Invalidate();
}
void PluginDataRemoverHelper::Init(const char* pref_name,
PrefService* prefs,
NotificationObserver* observer) {
pref_.Init(pref_name, prefs, observer);
registrar_.Add(this, content::NOTIFICATION_PLUGIN_ENABLE_STATUS_CHANGED,
NotificationService::AllSources());
internal_ = make_scoped_refptr(new Internal(pref_name, prefs));
internal_->StartUpdate();
}
void PluginDataRemoverHelper::Observe(int type,
const NotificationSource& source,
const NotificationDetails& details) {
if (type == content::NOTIFICATION_PLUGIN_ENABLE_STATUS_CHANGED) {
internal_->StartUpdate();
} else {
NOTREACHED();
}
}
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