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