blob: 88778577aa9322becc4a459a8e56549707b58197 [file] [log] [blame]
// Copyright 2018 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.
#include "content/common/content_export.h"
namespace content {
class RenderWidgetHost;
// An observer API implemented by classes which are interested
// in RenderWidgetHost events.
class CONTENT_EXPORT RenderWidgetHostObserver {
// This method is invoked when the visibility of the RenderWidgetHost changes.
virtual void RenderWidgetHostVisibilityChanged(RenderWidgetHost* widget_host,
bool became_visible) {}
// This method is invoked when the observed RenderWidgetHost is destroyed.
// This is guaranteed to be the last call made to the observer, so if the
// observer is tied to the observed RenderWidgetHost, it is safe to delete it.
virtual void RenderWidgetHostDestroyed(RenderWidgetHost* widget_host) {}
virtual ~RenderWidgetHostObserver() {}
} // namespace content