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      1 // Copyright 2013 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CHROME_BROWSER_ANDROID_RECENTLY_CLOSED_TABS_BRIDGE_H_
      6 #define CHROME_BROWSER_ANDROID_RECENTLY_CLOSED_TABS_BRIDGE_H_
      7 
      8 #include <jni.h>
      9 
     10 #include "base/android/scoped_java_ref.h"
     11 #include "base/compiler_specific.h"
     12 #include "chrome/browser/sessions/tab_restore_service_observer.h"
     13 
     14 class Profile;
     15 class TabRestoreService;
     16 
     17 // Provides the list of recently closed tabs to Java.
     18 class RecentlyClosedTabsBridge : public TabRestoreServiceObserver {
     19  public:
     20   explicit RecentlyClosedTabsBridge(Profile* profile);
     21 
     22   void Destroy(JNIEnv* env, jobject obj);
     23   void SetRecentlyClosedCallback(JNIEnv* env, jobject obj, jobject jcallback);
     24   jboolean GetRecentlyClosedTabs(JNIEnv* env,
     25                                  jobject obj,
     26                                  jobject jtabs,
     27                                  jint max_tab_count);
     28   jboolean OpenRecentlyClosedTab(JNIEnv* env,
     29                                  jobject obj,
     30                                  jobject jtab,
     31                                  jint tab_id);
     32   void ClearRecentlyClosedTabs(JNIEnv* env, jobject obj);
     33 
     34   // Observer callback for TabRestoreServiceObserver. Notifies the registered
     35   // callback that the recently closed tabs list has changed.
     36   virtual void TabRestoreServiceChanged(TabRestoreService* service) OVERRIDE;
     37 
     38   // Observer callback when our associated TabRestoreService is destroyed.
     39   virtual void TabRestoreServiceDestroyed(TabRestoreService* service) OVERRIDE;
     40 
     41   // Registers JNI methods.
     42   static bool Register(JNIEnv* env);
     43 
     44  private:
     45   virtual ~RecentlyClosedTabsBridge();
     46 
     47   // Construct and initialize tab_restore_service_ if it's NULL.
     48   // tab_restore_service_ may still be NULL, however, in incognito mode.
     49   void EnsureTabRestoreService();
     50 
     51   // The callback to be notified when the list of recently closed tabs changes.
     52   base::android::ScopedJavaGlobalRef<jobject> callback_;
     53 
     54   // The profile whose recently closed tabs are being monitored.
     55   Profile* profile_;
     56 
     57   // TabRestoreService that we are observing.
     58   TabRestoreService* tab_restore_service_;
     59 
     60   DISALLOW_COPY_AND_ASSIGN(RecentlyClosedTabsBridge);
     61 };
     62 
     63 #endif  // CHROME_BROWSER_ANDROID_RECENTLY_CLOSED_TABS_BRIDGE_H_
     64