File: lazy_event_dispatch_util.cc

package info (click to toggle)
chromium 139.0.7258.127-2
  • links: PTS, VCS
  • area: main
  • in suites: forky
  • size: 6,122,156 kB
  • sloc: cpp: 35,100,771; ansic: 7,163,530; javascript: 4,103,002; python: 1,436,920; asm: 946,517; xml: 746,709; pascal: 187,653; perl: 88,691; sh: 88,436; objc: 79,953; sql: 51,488; cs: 44,583; fortran: 24,137; makefile: 22,147; tcl: 15,277; php: 13,980; yacc: 8,984; ruby: 7,485; awk: 3,720; lisp: 3,096; lex: 1,327; ada: 727; jsp: 228; sed: 36
file content (124 lines) | stat: -rw-r--r-- 4,343 bytes parent folder | download | duplicates (7)
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
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "extensions/browser/events/lazy_event_dispatch_util.h"

#include <optional>

#include "base/observer_list.h"
#include "base/version.h"
#include "content/public/browser/browser_context.h"
#include "extensions/browser/event_router.h"
#include "extensions/browser/extension_prefs.h"

namespace extensions {

namespace {

// Previously installed version number.
const char kPrefPreviousVersion[] = "previous_version";

// A preference key storing the information about an extension that was
// installed but not loaded. We keep the pending info here so that we can send
// chrome.runtime.onInstalled event during the extension load.
const char kPrefPendingOnInstalledEventDispatchInfo[] =
    "pending_on_installed_event_dispatch_info";

}  // namespace

LazyEventDispatchUtil::LazyEventDispatchUtil(
    content::BrowserContext* browser_context)
    : browser_context_(browser_context) {
  extension_registry_observation_.Observe(
      ExtensionRegistry::Get(browser_context_));
}

LazyEventDispatchUtil::~LazyEventDispatchUtil() = default;

void LazyEventDispatchUtil::AddObserver(Observer* observer) {
  observers_.AddObserver(observer);
}

void LazyEventDispatchUtil::RemoveObserver(Observer* observer) {
  observers_.RemoveObserver(observer);
}

void LazyEventDispatchUtil::OnExtensionLoaded(
    content::BrowserContext* browser_context,
    const Extension* extension) {
  base::Version previous_version;
  if (ReadPendingOnInstallInfoFromPref(extension->id(), &previous_version)) {
    for (auto& observer : observers_) {
      observer.OnExtensionInstalledAndLoaded(browser_context_, extension,
                                             previous_version);
    }
    RemovePendingOnInstallInfoFromPref(extension->id());
  }
}

void LazyEventDispatchUtil::OnExtensionUninstalled(
    content::BrowserContext* browser_context,
    const Extension* extension,
    UninstallReason reason) {
  RemovePendingOnInstallInfoFromPref(extension->id());
}

void LazyEventDispatchUtil::OnExtensionWillBeInstalled(
    content::BrowserContext* browser_context,
    const Extension* extension,
    bool is_update,
    const std::string& old_name) {
  StorePendingOnInstallInfoToPref(extension);
}

bool LazyEventDispatchUtil::ReadPendingOnInstallInfoFromPref(
    const ExtensionId& extension_id,
    base::Version* previous_version) {
  ExtensionPrefs* prefs = ExtensionPrefs::Get(browser_context_);
  DCHECK(prefs);

  const base::Value::Dict* info = prefs->ReadPrefAsDict(
      extension_id, kPrefPendingOnInstalledEventDispatchInfo);
  if (!info) {
    return false;
  }

  const std::string* previous_version_string =
      info->FindString(kPrefPreviousVersion);
  // |previous_version_string| can be empty.
  *previous_version = base::Version(
      previous_version_string ? *previous_version_string : std::string());
  return true;
}

void LazyEventDispatchUtil::RemovePendingOnInstallInfoFromPref(
    const ExtensionId& extension_id) {
  ExtensionPrefs* prefs = ExtensionPrefs::Get(browser_context_);
  DCHECK(prefs);

  prefs->UpdateExtensionPref(
      extension_id, kPrefPendingOnInstalledEventDispatchInfo, std::nullopt);
}

void LazyEventDispatchUtil::StorePendingOnInstallInfoToPref(
    const Extension* extension) {
  ExtensionPrefs* prefs = ExtensionPrefs::Get(browser_context_);
  DCHECK(prefs);

  // |pending_on_install_info| currently only contains a version string. Instead
  // of making the pref hold a plain string, we store it as a dictionary value
  // so that we can add more stuff to it in the future if necessary.
  base::Value::Dict pending_on_install_info;
  base::Version previous_version = ExtensionRegistry::Get(browser_context_)
                                       ->GetStoredVersion(extension->id());
  pending_on_install_info.Set(kPrefPreviousVersion,
                              previous_version.IsValid()
                                  ? previous_version.GetString()
                                  : std::string());
  prefs->UpdateExtensionPref(extension->id(),
                             kPrefPendingOnInstalledEventDispatchInfo,
                             base::Value(std::move(pending_on_install_info)));
}

}  // namespace extensions