DialogSurfaceHolder implementation.

media/base/android/dialog_surface_holder.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MEDIA_BASE_ANDROID_DIALOG_SURFACE_HOLDER_H_
 #define MEDIA_BASE_ANDROID_DIALOG_SURFACE_HOLDER_H_
 
 #include <jni.h>
 #include <stddef.h>
 #include <stdint.h>
 
 #include <set>
 #include <string>
 
 #include "base/android/scoped_java_ref.h"
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/task_runner.h"
 #include "base/threading/thread_checker.h"
 #include "base/time/time.h"
 #include "media/base/media_export.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gl/android/scoped_java_surface.h"
 
+namespace base {
+class WaitableEvent;
+}
+
 namespace media {
 
 class DialogSurfaceCallback;
 class DialogSurfaceManager;
 
 // This class implements the C++ wrapper around a java DialogSurfaceHolder.
 // All callbacks happen on the thread that it's constructed on.
 class MEDIA_EXPORT DialogSurfaceHolder {
  public:
   // These must match DialogSurface.java
   enum CallbackOp { SURFACE_CREATED = 0, SURFACE_DESTROYED = 1 };
 
   // Callback type for finding out about the status of the surface.  While we
   // don't use this directly, it lets us keep DialogSurfaceCallback as an
   // implementation detail.
   using Callback = base::Callback<void(CallbackOp)>;
 
   // Configuration for the surface.
   struct Config {
     gfx::Rect rect;
     // This may also include pixel format, is_secure, etc.
   };
 
+  // |unwrapped_surface| is the IDialogSurface java instance, which
+  // we will take ownership of.  |callback| is the wrapped callback that it will
+  // use to communicate with us (DialogSurfaceCallback).
+  // Note: one generally doesn't want to call this directly.  Use
+  // DialogSurfaceManager instead.
+  DialogSurfaceHolder(const base::android::JavaRef<jobject>& unwrapped_surface,
+                      std::unique_ptr<DialogSurfaceCallback>&& callback);
+  ~DialogSurfaceHolder();
+
   // Schedule a relayout and/or reposition of the surface.
-  // void ScheduleLayout(const Config& config);
+  void ScheduleLayout(const Config& config);
 
   // Return the java surface, if any.  One should not assume that this is
   // available immediately.  The callback will be called with SURFACE_CREATED
   // when it is available.  Of course, it may become unavailable again
   // asynchronously, so one must always check.
-  // gl::ScopedJavaSurface GetSurface();
+  gl::ScopedJavaSurface GetSurface();
+
+ protected:
+  bool CalledOnValidThread() const;
+
+ private:
+  // Java DialogSurfaceWrapper instance.
+  base::android::ScopedJavaGlobalRef<jobject> j_wrapped_surface_;
+
+  // Callback that's associated with this surface.  We maintain ownership of it
+  // so that the native object stays around while we do.
+  std::unique_ptr<DialogSurfaceCallback> wrapped_callback_;
+
+  base::ThreadChecker thread_checker_;
+
+  DISALLOW_COPY_AND_ASSIGN(DialogSurfaceHolder);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_ANDROID_DIALOG_SURFACE_HOLDER_H_