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_PUBLIC_BROWSER_SCREEN_ORIENTATION_PROVIDER_H_
6#define CONTENT_PUBLIC_BROWSER_SCREEN_ORIENTATION_PROVIDER_H_
7
8#include "base/macros.h"
9#include "content/common/content_export.h"
10#include "third_party/WebKit/public/platform/WebScreenOrientationLockType.h"
11
12namespace content {
13
14class ScreenOrientationDispatcherHost;
15class WebContents;
16
17// Interface that needs to be implemented by any backend that wants to handle
18// screen orientation lock/unlock.
19class CONTENT_EXPORT ScreenOrientationProvider {
20 public:
21  // Lock the screen orientation to |orientations|.
22  virtual void LockOrientation(
23      int request_id,
24      blink::WebScreenOrientationLockType orientations) = 0;
25
26  // Unlock the screen orientation.
27  virtual void UnlockOrientation() = 0;
28
29  // Inform about a screen orientation update. It is called to let the provider
30  // know if a lock has been resolved.
31  virtual void OnOrientationChange() = 0;
32
33  virtual ~ScreenOrientationProvider() {}
34
35 protected:
36  friend class ScreenOrientationDispatcherHostImpl;
37
38  static ScreenOrientationProvider* Create(
39      ScreenOrientationDispatcherHost* dispatcher_host,
40      WebContents* web_contents);
41
42  ScreenOrientationProvider() {}
43
44  DISALLOW_COPY_AND_ASSIGN(ScreenOrientationProvider);
45};
46
47#if !defined(OS_ANDROID)
48// static
49ScreenOrientationProvider* ScreenOrientationProvider::Create(
50    ScreenOrientationDispatcherHost* dispatcher_host,
51    WebContents* web_contents) {
52  return NULL;
53}
54#endif // !defined(OS_ANDROID)
55
56} // namespace content
57
58#endif // CONTENT_PUBLIC_BROWSER_SCREEN_ORIENTATION_PROVIDER_H_
59