content/browser/screen_orientation/screen_orientation_provider.h

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