1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
|
// Copyright 2023 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_RESOURCE_ATTRIBUTION_PAGE_CONTEXT_H_
#define COMPONENTS_PERFORMANCE_MANAGER_PUBLIC_RESOURCE_ATTRIBUTION_PAGE_CONTEXT_H_
#include <compare>
#include <optional>
#include <string>
#include "base/check.h"
#include "base/memory/weak_ptr.h"
#include "base/unguessable_token.h"
namespace content {
class WebContents;
}
namespace performance_manager {
class PageNode;
}
namespace resource_attribution {
class PageContext {
public:
~PageContext();
PageContext(const PageContext& other);
PageContext& operator=(const PageContext& other);
PageContext(PageContext&& other);
PageContext& operator=(PageContext&& other);
// UI thread methods
// Returns the PageContext for `contents`, which must be non-null. Returns
// nullopt if the WebContents is not registered with PerformanceManager.
static std::optional<PageContext> FromWebContents(
content::WebContents* contents);
// Returns the WebContents for this context, or nullptr if it no longer
// exists.
content::WebContents* GetWebContents() const;
// Returns the PageNode for this context, or a null WeakPtr if it no longer
// exists.
base::WeakPtr<performance_manager::PageNode> GetWeakPageNode() const;
// PM sequence methods
// Returns the PageContext for `node`. Equivalent to
// node->GetResourceContext().
static PageContext FromPageNode(const performance_manager::PageNode* node);
// Returns the PageContext for `node`, or nullopt if `node` is null.
static std::optional<PageContext> FromWeakPageNode(
base::WeakPtr<performance_manager::PageNode> node);
// Returns the PageNode for this context, or nullptr if it no longer exists.
performance_manager::PageNode* GetPageNode() const;
// Returns a string representation of the context for debugging. This matches
// the interface of base::TokenType and base::UnguessableToken, for
// convenience.
std::string ToString() const;
// Compare PageContexts by PageNode token.
constexpr friend auto operator<=>(const PageContext& a,
const PageContext& b) {
return a.token_ <=> b.token_;
}
// Test PageContexts for equality by PageNode token.
constexpr friend bool operator==(const PageContext& a, const PageContext& b) {
return a.token_ == b.token_;
}
private:
PageContext(base::UnguessableToken token,
base::WeakPtr<content::WebContents> weak_web_contents,
base::WeakPtr<performance_manager::PageNode> weak_node);
// A unique identifier for the PageNode. A PageNodeImpl::PageToken will be
// assigned to this, but DEPS rules won't let PageNodeImpl be included in a
// public header so UnguessableToken is used directly here. Used to ensure
// that PageContexts for the same PageNode compare equal.
base::UnguessableToken token_;
// A pointer to the WebContents that must be dereferenced on the UI thread.
base::WeakPtr<content::WebContents> weak_web_contents_;
// A pointer to the PageNode that must be dereferenced on the PM sequence.
base::WeakPtr<performance_manager::PageNode> weak_node_;
};
} // namespace resource_attribution
#endif // COMPONENTS_PERFORMANCE_MANAGER_PUBLIC_RESOURCE_ATTRIBUTION_PAGE_CONTEXT_H_
|
