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// Copyright 2013 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.
#ifndef CHROME_BROWSER_ANDROID_MOST_VISITED_SITES_H_
#define CHROME_BROWSER_ANDROID_MOST_VISITED_SITES_H_
#include <jni.h>
#include "base/android/scoped_java_ref.h"
#include "base/compiler_specific.h"
#include "base/memory/weak_ptr.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/sync/profile_sync_service_observer.h"
#include "components/history/core/browser/history_types.h"
#include "components/suggestions/proto/suggestions.pb.h"
#include "content/public/browser/notification_observer.h"
#include "content/public/browser/notification_registrar.h"
namespace suggestions {
class SuggestionsService;
}
// Provides the list of most visited sites and their thumbnails to Java.
class MostVisitedSites : public ProfileSyncServiceObserver,
public content::NotificationObserver {
public:
typedef base::Callback<
void(base::android::ScopedJavaGlobalRef<jobject>* bitmap,
base::android::ScopedJavaGlobalRef<jobject>* j_callback)>
LookupSuccessCallback;
explicit MostVisitedSites(Profile* profile);
void Destroy(JNIEnv* env, jobject obj);
void OnLoadingComplete(JNIEnv* env, jobject obj);
void SetMostVisitedURLsObserver(JNIEnv* env,
jobject obj,
jobject j_observer,
jint num_sites);
void GetURLThumbnail(JNIEnv* env,
jobject obj,
jstring url,
jobject j_callback);
void BlacklistUrl(JNIEnv* env, jobject obj, jstring j_url);
void RecordOpenedMostVisitedItem(JNIEnv* env, jobject obj, jint index);
// content::NotificationObserver implementation.
virtual void Observe(int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) override;
// ProfileSyncServiceObserver implementation.
virtual void OnStateChanged() override;
// Registers JNI methods.
static bool Register(JNIEnv* env);
private:
// The source of the Most Visited sites.
enum MostVisitedSource {
TOP_SITES,
SUGGESTIONS_SERVICE
};
virtual ~MostVisitedSites();
void QueryMostVisitedURLs();
// Initialize the query to Top Sites. Called if the SuggestionsService is not
// enabled, or if it returns no data.
void InitiateTopSitesQuery();
// Callback for when data is available from TopSites.
void OnMostVisitedURLsAvailable(
base::android::ScopedJavaGlobalRef<jobject>* j_observer,
int num_sites,
const history::MostVisitedURLList& visited_list);
// Callback for when data is available from the SuggestionsService.
void OnSuggestionsProfileAvailable(
base::android::ScopedJavaGlobalRef<jobject>* j_observer,
const suggestions::SuggestionsProfile& suggestions_profile);
// Callback for when the local thumbnail lookup is complete.
void OnObtainedThumbnail(
base::android::ScopedJavaGlobalRef<jobject>* bitmap,
base::android::ScopedJavaGlobalRef<jobject>* j_callback);
// Requests a server thumbnail from the |suggestions_service|.
void GetSuggestionsThumbnailOnUIThread(
suggestions::SuggestionsService* suggestions_service,
const std::string& url_string,
base::android::ScopedJavaGlobalRef<jobject>* j_callback);
// Callback from the SuggestionsServer regarding the server thumbnail lookup.
void OnSuggestionsThumbnailAvailable(
base::android::ScopedJavaGlobalRef<jobject>* j_callback,
const GURL& url,
const SkBitmap* bitmap);
// Records specific UMA histogram metrics.
void RecordUMAMetrics();
// The profile whose most visited sites will be queried.
Profile* profile_;
// The observer to be notified when the list of most visited sites changes.
base::android::ScopedJavaGlobalRef<jobject> observer_;
// The maximum number of most visited sites to return.
int num_sites_;
// Whether the user is in a control group for the purposes of logging.
bool is_control_group_;
// Keeps track of whether the initial NTP load has been done.
bool initial_load_done_;
// Counters for UMA metrics.
// Number of tiles using a local thumbnail image for this NTP session.
int num_local_thumbs_;
// Number of tiles for which a server thumbnail is provided.
int num_server_thumbs_;
// Number of tiles for which no thumbnail is found/specified and a gray tile
// is used as the main tile.
int num_empty_thumbs_;
// Copy of the server suggestions (if enabled). Used for logging.
suggestions::SuggestionsProfile server_suggestions_;
content::NotificationRegistrar registrar_;
MostVisitedSource mv_source_;
// For callbacks may be run after destruction.
base::WeakPtrFactory<MostVisitedSites> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(MostVisitedSites);
};
#endif // CHROME_BROWSER_ANDROID_MOST_VISITED_SITES_H_
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