1// Copyright 2014 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 CONTENT_BROWSER_SCREEN_ORIENTATION_SCREEN_ORIENTATION_PROVIDER_ANDROID_H_
6#define CONTENT_BROWSER_SCREEN_ORIENTATION_SCREEN_ORIENTATION_PROVIDER_ANDROID_H_
7
8#include <jni.h>
9
10#include "base/compiler_specific.h"
11#include "content/public/browser/screen_orientation_provider.h"
12#include "content/public/browser/web_contents_observer.h"
13
14namespace content {
15
16class ScreenOrientationDispatcherHost;
17class WebContentsImpl;
18
19class ScreenOrientationProviderAndroid : public ScreenOrientationProvider,
20                                         public WebContentsObserver {
21 public:
22  explicit ScreenOrientationProviderAndroid(
23      ScreenOrientationDispatcherHost* dispatcher,
24      WebContents* web_contents);
25
26  static bool Register(JNIEnv* env);
27
28  // ScreenOrientationProvider
29  virtual void LockOrientation(int request_id,
30                               blink::WebScreenOrientationLockType) OVERRIDE;
31  virtual void UnlockOrientation() OVERRIDE;
32  virtual void OnOrientationChange() OVERRIDE;
33
34  // WebContentsObserver
35  virtual void DidToggleFullscreenModeForTab(bool entered_fullscreen) OVERRIDE;
36
37  // Ask the ScreenOrientationListener (Java) to start accurately listening to
38  // the screen orientation. It keep track of the number of start request if it
39  // is already running an accurate listening.
40  static void StartAccurateListening();
41
42  // Ask the ScreenOrientationListener (Java) to stop accurately listening to
43  // the screen orientation. It will actually stop only if the number of stop
44  // requests matches the number of start requests.
45  static void StopAccurateListening();
46
47 private:
48  WebContentsImpl* web_contents_impl();
49
50  // Whether the passed |lock| matches the current orientation. In other words,
51  // whether the orientation will need to change to match the |lock|.
52  bool LockMatchesCurrentOrientation(blink::WebScreenOrientationLockType lock);
53
54  // Returns the lock type that should be associated with 'natural' lock.
55  // Returns WebScreenOrientationLockDefault if the natural lock type can't be
56  // found.
57  blink::WebScreenOrientationLockType GetNaturalLockType() const;
58
59  virtual ~ScreenOrientationProviderAndroid();
60
61  // ScreenOrientationDispatcherHost owns ScreenOrientationProvider so
62  // dispatcher_ should not point to an invalid memory.
63  ScreenOrientationDispatcherHost* dispatcher_;
64
65  // Whether the ScreenOrientationProvider currently has a lock applied.
66  bool lock_applied_;
67
68  struct LockInformation {
69    LockInformation(int request_id, blink::WebScreenOrientationLockType lock);
70    int request_id;
71    blink::WebScreenOrientationLockType lock;
72  };
73  LockInformation* pending_lock_;
74
75  DISALLOW_COPY_AND_ASSIGN(ScreenOrientationProviderAndroid);
76};
77
78} // namespace content
79
80#endif // CONTENT_BROWSER_SCREEN_ORIENTATION_SCREEN_ORIENTATION_PROVIDER_ANDROID_H_
81