ui/display/chromeos/query_content_protection_task.h

   1 // Copyright 2015 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 UI_DISPLAY_CHROMEOS_QUERY_CONTENT_PROTECTION_TASK_H_
   6 #define UI_DISPLAY_CHROMEOS_QUERY_CONTENT_PROTECTION_TASK_H_
   7
   8 #include "base/callback.h"
   9 #include "base/memory/weak_ptr.h"
  10 #include "ui/display/display_export.h"
  11 #include "ui/display/types/display_constants.h"
  12
  13 namespace ui {
  14
  15 class DisplayLayoutManager;
  16 class NativeDisplayDelegate;
  17
  18 class DISPLAY_EXPORT QueryContentProtectionTask {
  19  public:
  20   struct Response {
  21     bool success = false;
  22     uint32_t link_mask = 0;
  23     uint32_t enabled = 0;
  24     uint32_t unfulfilled = 0;
  25   };
  26
  27   typedef base::Callback<void(Response)> ResponseCallback;
  28
  29   QueryContentProtectionTask(DisplayLayoutManager* layout_manager,
  30                              NativeDisplayDelegate* native_display_delegate,
  31                              int64_t display_id,
  32                              const ResponseCallback& callback);
  33   ~QueryContentProtectionTask();
  34
  35   void Run();
  36
  37  private:
  38   // Callback for NativeDisplayDelegate::GetHDCPState()
  39   void OnHDCPStateUpdate(bool success, HDCPState state);
  40
  41   DisplayLayoutManager* layout_manager_;  // Not owned.
  42
  43   NativeDisplayDelegate* native_display_delegate_;  // Not owned.
  44
  45   // Display ID for the query.
  46   int64_t display_id_;
  47
  48   // Called at the end of the query to signal completion.
  49   ResponseCallback callback_;
  50
  51   Response response_;
  52
  53   // Tracks the number of NativeDisplayDelegate requests sent but not answered
  54   // yet.
  55   size_t pending_requests_;
  56
  57   base::WeakPtrFactory<QueryContentProtectionTask> weak_ptr_factory_;
  58
  59   DISALLOW_COPY_AND_ASSIGN(QueryContentProtectionTask);
  60 };
  61
  62 }  // namespace ui
  63
  64 #endif  // UI_DISPLAY_CHROMEOS_QUERY_CONTENT_PROTECTION_TASK_H_