chromium/components/performance_manager/public/graph/page_node.h

// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef COMPONENTS_PERFORMANCE_MANAGER_PUBLIC_GRAPH_PAGE_NODE_H_
#define COMPONENTS_PERFORMANCE_MANAGER_PUBLIC_GRAPH_PAGE_NODE_H_

#include <optional>
#include <ostream>
#include <string>

#include "base/containers/flat_set.h"
#include "base/observer_list_types.h"
#include "components/performance_manager/public/graph/node.h"
#include "components/performance_manager/public/graph/node_set_view.h"
#include "components/performance_manager/public/mojom/coordination_unit.mojom.h"
#include "components/performance_manager/public/mojom/lifecycle.mojom.h"
#include "components/performance_manager/public/resource_attribution/page_context.h"
#include "services/metrics/public/cpp/ukm_source_id.h"
#include "third_party/blink/public/common/permissions/permission_utils.h"

class GURL;

namespace content {
class WebContents;
}

namespace performance_manager {

class FrameNode;
class PageNodeObserver;

enum class PageType { … };

// A PageNode represents the root of a FrameTree, or equivalently a WebContents.
// These may correspond to normal tabs, WebViews, Chrome Apps or Extensions.
class PageNode : public TypedNode<PageNode> { … };

// Pure virtual observer interface. Derive from this if you want to be forced to
// implement the entire interface.
class PageNodeObserver : public base::CheckedObserver { … };

// Default implementation of observer that provides dummy versions of each
// function. Derive from this if you only need to implement a few of the
// functions.
class PageNode::ObserverDefaultImpl : public PageNodeObserver { … };

// std::ostream support for PageNode::EmbeddingType.
std::ostream& operator<<(
    std::ostream& os,
    performance_manager::PageNode::EmbeddingType embedding_type);

}  // namespace performance_manager

#endif  // COMPONENTS_PERFORMANCE_MANAGER_PUBLIC_GRAPH_PAGE_NODE_H_