// 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 CONTENT_BROWSER_FRAME_HOST_NAVIGATION_CONTROLLER_ANDROID_H_
#define CONTENT_BROWSER_FRAME_HOST_NAVIGATION_CONTROLLER_ANDROID_H_

#include <jni.h>

#include "base/android/scoped_java_ref.h"
#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "content/common/content_export.h"

namespace content {

class NavigationController;

// Android wrapper around NavigationController that provides safer passage
// from java and back to native and provides java with a means of communicating
// with its native counterpart.
class CONTENT_EXPORT NavigationControllerAndroid {
 public:
  static bool Register(JNIEnv* env);

  explicit NavigationControllerAndroid(
      NavigationController* navigation_controller);
  ~NavigationControllerAndroid();

  NavigationController* navigation_controller() const {
    return navigation_controller_;
  }

  base::android::ScopedJavaLocalRef<jobject> GetJavaObject();

  jboolean CanGoBack(JNIEnv* env, jobject obj);
  jboolean CanGoForward(JNIEnv* env, jobject obj);
  jboolean CanGoToOffset(JNIEnv* env, jobject obj, jint offset);
  void GoBack(JNIEnv* env, jobject obj);
  void GoForward(JNIEnv* env, jobject obj);
  void GoToOffset(JNIEnv* env, jobject obj, jint offset);
  void GoToNavigationIndex(JNIEnv* env, jobject obj, jint index);

 private:
  NavigationController* navigation_controller_;
  base::android::ScopedJavaGlobalRef<jobject> obj_;

  DISALLOW_COPY_AND_ASSIGN(NavigationControllerAndroid);
};

}  // namespace content

#endif  // CONTENT_BROWSER_FRAME_HOST_NAVIGATION_CONTROLLER_ANDROID_H_