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
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
|
// Copyright 2021 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/extension_host_registry.h"
#include "base/check.h"
#include "base/containers/contains.h"
#include "base/no_destructor.h"
#include "base/observer_list.h"
#include "components/keyed_service/content/browser_context_dependency_manager.h"
#include "components/keyed_service/content/browser_context_keyed_service_factory.h"
#include "content/public/browser/render_frame_host.h"
#include "extensions/browser/extension_host.h"
#include "extensions/browser/extensions_browser_client.h"
namespace extensions {
namespace {
class ExtensionHostRegistryFactory : public BrowserContextKeyedServiceFactory {
public:
ExtensionHostRegistryFactory();
ExtensionHostRegistryFactory(const ExtensionHostRegistryFactory&) = delete;
ExtensionHostRegistryFactory& operator=(const ExtensionHostRegistryFactory&) =
delete;
~ExtensionHostRegistryFactory() override = default;
ExtensionHostRegistry* GetForBrowserContext(content::BrowserContext* context);
private:
// BrowserContextKeyedServiceFactory:
content::BrowserContext* GetBrowserContextToUse(
content::BrowserContext* context) const override;
std::unique_ptr<KeyedService> BuildServiceInstanceForBrowserContext(
content::BrowserContext* context) const override;
};
ExtensionHostRegistryFactory::ExtensionHostRegistryFactory()
: BrowserContextKeyedServiceFactory(
"ExtensionHostRegistry",
BrowserContextDependencyManager::GetInstance()) {}
ExtensionHostRegistry* ExtensionHostRegistryFactory::GetForBrowserContext(
content::BrowserContext* browser_context) {
return static_cast<ExtensionHostRegistry*>(
GetServiceForBrowserContext(browser_context, /*create=*/true));
}
content::BrowserContext* ExtensionHostRegistryFactory::GetBrowserContextToUse(
content::BrowserContext* context) const {
// This seems like a service that should have its own instance in incognito
// in order to better ensure there isn't any bleed-over from off-the-record
// contexts. Unfortunately, other systems (I'm looking at you,
// LazyBackgroundTaskQueue!) rely on this, and are set up to be redirect to
// the original context. This makes it quite challenging to let this have its
// own incognito context.
return ExtensionsBrowserClient::Get()->GetContextRedirectedToOriginal(
context);
}
std::unique_ptr<KeyedService>
ExtensionHostRegistryFactory::BuildServiceInstanceForBrowserContext(
content::BrowserContext* context) const {
return std::make_unique<ExtensionHostRegistry>();
}
} // namespace
ExtensionHostRegistry::ExtensionHostRegistry() = default;
ExtensionHostRegistry::~ExtensionHostRegistry() = default;
// static
ExtensionHostRegistry* ExtensionHostRegistry::Get(
content::BrowserContext* browser_context) {
return static_cast<ExtensionHostRegistryFactory*>(GetFactory())
->GetForBrowserContext(browser_context);
}
// static
BrowserContextKeyedServiceFactory* ExtensionHostRegistry::GetFactory() {
static base::NoDestructor<ExtensionHostRegistryFactory> g_factory;
return g_factory.get();
}
void ExtensionHostRegistry::ExtensionHostCreated(
ExtensionHost* extension_host) {
DCHECK(!base::Contains(extension_hosts_, extension_host));
extension_hosts_.insert(extension_host);
// Note: There's not currently any observer method corresponding to host
// creation, because most systems and listeners care about the host being
// at a certain state of readiness. This is just to start properly
// tracking the host.
}
void ExtensionHostRegistry::ExtensionHostRenderProcessReady(
ExtensionHost* extension_host) {
DCHECK(base::Contains(extension_hosts_, extension_host));
for (Observer& observer : observers_) {
observer.OnExtensionHostRenderProcessReady(
extension_host->browser_context(), extension_host);
}
}
void ExtensionHostRegistry::ExtensionHostCompletedFirstLoad(
ExtensionHost* extension_host) {
DCHECK(base::Contains(extension_hosts_, extension_host));
// TODO(devlin): This can unexpectedly fire when a renderer process is
// terminating. When a renderer process is terminated, it causes the
// RenderFrameHostImpl to reset its loading state, which calls
// DidStopLoading() if it was loading. Then, if the first load never
// happened, ExtensionHost will fire the DidCompleteFirstLoad() notification.
//
// This is probably a behavioral bug. We should have ExtensionHost check
// whether the renderer is still around or whether the load succeeded before
// notifying observers, or at least indicate the success in the notification.
for (Observer& observer : observers_) {
observer.OnExtensionHostCompletedFirstLoad(
extension_host->browser_context(), extension_host);
}
}
void ExtensionHostRegistry::ExtensionHostDocumentElementAvailable(
ExtensionHost* extension_host) {
DCHECK(base::Contains(extension_hosts_, extension_host));
for (Observer& observer : observers_) {
observer.OnExtensionHostDocumentElementAvailable(
extension_host->browser_context(), extension_host);
}
}
void ExtensionHostRegistry::ExtensionHostRenderProcessGone(
ExtensionHost* extension_host) {
DCHECK(base::Contains(extension_hosts_, extension_host));
for (Observer& observer : observers_) {
observer.OnExtensionHostRenderProcessGone(extension_host->browser_context(),
extension_host);
}
}
void ExtensionHostRegistry::ExtensionHostDestroyed(
ExtensionHost* extension_host) {
DCHECK(base::Contains(extension_hosts_, extension_host));
extension_hosts_.erase(extension_host);
for (Observer& observer : observers_) {
observer.OnExtensionHostDestroyed(extension_host->browser_context(),
extension_host);
}
}
std::vector<ExtensionHost*> ExtensionHostRegistry::GetHostsForExtension(
const ExtensionId& extension_id) {
std::vector<ExtensionHost*> hosts;
for (ExtensionHost* host : extension_hosts_) {
if (host->extension_id() == extension_id) {
hosts.push_back(host);
}
}
return hosts;
}
ExtensionHost* ExtensionHostRegistry::GetExtensionHostForPrimaryMainFrame(
content::RenderFrameHost* render_frame_host) {
DCHECK(render_frame_host->IsInPrimaryMainFrame())
<< "GetExtensionHostForPrimaryMainFrame() should only be called with "
<< "the primary main frame.";
for (ExtensionHost* host : extension_hosts_) {
if (host->main_frame_host() == render_frame_host) {
return host;
}
}
return nullptr;
}
void ExtensionHostRegistry::AddObserver(Observer* observer) {
observers_.AddObserver(observer);
}
void ExtensionHostRegistry::RemoveObserver(Observer* observer) {
observers_.RemoveObserver(observer);
}
void ExtensionHostRegistry::Shutdown() {
for (Observer& observer : observers_) {
observer.OnExtensionHostRegistryShutdown(this);
}
}
} // namespace extensions
|
