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// Copyright 2014 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 "extensions/browser/renderer_startup_helper.h"
#include "base/values.h"
#include "components/keyed_service/content/browser_context_dependency_manager.h"
#include "content/public/browser/notification_service.h"
#include "content/public/browser/notification_types.h"
#include "content/public/browser/render_process_host.h"
#include "extensions/browser/extension_function_dispatcher.h"
#include "extensions/browser/extension_registry.h"
#include "extensions/browser/extensions_browser_client.h"
#include "extensions/browser/guest_view/web_view/web_view_guest.h"
#include "extensions/common/extension_messages.h"
#include "extensions/common/extension_set.h"
#include "extensions/common/extensions_client.h"
#include "extensions/common/features/feature_channel.h"
#include "extensions/common/features/feature_session_type.h"
#include "ui/base/webui/web_ui_util.h"
using content::BrowserContext;
namespace extensions {
RendererStartupHelper::RendererStartupHelper(BrowserContext* browser_context)
: browser_context_(browser_context) {
DCHECK(browser_context);
registrar_.Add(this, content::NOTIFICATION_RENDERER_PROCESS_CREATED,
content::NotificationService::AllBrowserContextsAndSources());
registrar_.Add(this, content::NOTIFICATION_RENDERER_PROCESS_TERMINATED,
content::NotificationService::AllBrowserContextsAndSources());
}
RendererStartupHelper::~RendererStartupHelper() {}
void RendererStartupHelper::Observe(
int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) {
switch (type) {
case content::NOTIFICATION_RENDERER_PROCESS_CREATED:
InitializeProcess(
content::Source<content::RenderProcessHost>(source).ptr());
break;
case content::NOTIFICATION_RENDERER_PROCESS_TERMINATED:
UntrackProcess(content::Source<content::RenderProcessHost>(source).ptr());
break;
default:
NOTREACHED() << "Unexpected notification: " << type;
}
}
void RendererStartupHelper::InitializeProcess(
content::RenderProcessHost* process) {
ExtensionsBrowserClient* client = ExtensionsBrowserClient::Get();
if (!client->IsSameContext(browser_context_, process->GetBrowserContext()))
return;
bool activity_logging_enabled =
client->IsActivityLoggingEnabled(process->GetBrowserContext());
// We only send the ActivityLoggingEnabled message if it is enabled; otherwise
// the default (not enabled) is correct.
if (activity_logging_enabled) {
process->Send(
new ExtensionMsg_SetActivityLoggingEnabled(activity_logging_enabled));
}
// Extensions need to know the channel and the session type for API
// restrictions. The values are sent to all renderers, as the non-extension
// renderers may have content scripts.
process->Send(new ExtensionMsg_SetSessionInfo(
GetCurrentChannel(), GetCurrentFeatureSessionType()));
// Platform apps need to know the system font.
// TODO(dbeam): this is not the system font in all cases.
process->Send(new ExtensionMsg_SetSystemFont(webui::GetFontFamily(),
webui::GetFontSize()));
// Scripting whitelist. This is modified by tests and must be communicated
// to renderers.
process->Send(new ExtensionMsg_SetScriptingWhitelist(
extensions::ExtensionsClient::Get()->GetScriptingWhitelist()));
// If the new render process is a WebView guest process, propagate the WebView
// partition ID to it.
std::string webview_partition_id = WebViewGuest::GetPartitionID(process);
if (!webview_partition_id.empty()) {
process->Send(new ExtensionMsg_SetWebViewPartitionID(
WebViewGuest::GetPartitionID(process)));
}
// Loaded extensions.
std::vector<ExtensionMsg_Loaded_Params> loaded_extensions;
const ExtensionSet& extensions =
ExtensionRegistry::Get(browser_context_)->enabled_extensions();
for (const auto& ext : extensions) {
// Renderers don't need to know about themes.
if (!ext->is_theme()) {
// TODO(kalman): Only include tab specific permissions for extension
// processes, no other process needs it, so it's mildly wasteful.
// I am not sure this is possible to know this here, at such a low
// level of the stack. Perhaps site isolation can help.
bool include_tab_permissions = true;
loaded_extensions.push_back(
ExtensionMsg_Loaded_Params(ext.get(), include_tab_permissions));
}
}
process->Send(new ExtensionMsg_Loaded(loaded_extensions));
auto iter = pending_active_extensions_.find(process);
if (iter != pending_active_extensions_.end()) {
for (const ExtensionId& id : iter->second) {
DCHECK(extensions.Contains(id));
process->Send(new ExtensionMsg_ActivateExtension(id));
}
}
initialized_processes_.insert(process);
}
void RendererStartupHelper::UntrackProcess(
content::RenderProcessHost* process) {
if (!ExtensionsBrowserClient::Get()->IsSameContext(
browser_context_, process->GetBrowserContext())) {
return;
}
initialized_processes_.erase(process);
pending_active_extensions_.erase(process);
}
void RendererStartupHelper::ActivateExtensionInProcess(
const Extension& extension,
content::RenderProcessHost* process) {
// Renderers don't need to know about themes. We also don't normally
// "activate" themes, but this could happen if someone tries to open a tab
// to the e.g. theme's manifest.
if (extension.is_theme())
return;
if (initialized_processes_.count(process))
process->Send(new ExtensionMsg_ActivateExtension(extension.id()));
else
pending_active_extensions_[process].insert(extension.id());
}
void RendererStartupHelper::OnExtensionLoaded(const Extension& extension) {
// Renderers don't need to know about themes.
if (extension.is_theme())
return;
// We don't need to include tab permisisons here, since the extension
// was just loaded.
// Uninitialized renderers will be informed of the extension load during the
// first batch of messages.
std::vector<ExtensionMsg_Loaded_Params> params(
1,
ExtensionMsg_Loaded_Params(&extension, false /* no tab permissions */));
for (content::RenderProcessHost* process : initialized_processes_)
process->Send(new ExtensionMsg_Loaded(params));
}
void RendererStartupHelper::OnExtensionUnloaded(const Extension& extension) {
// Renderers don't need to know about themes.
if (extension.is_theme())
return;
for (content::RenderProcessHost* process : initialized_processes_)
process->Send(new ExtensionMsg_Unloaded(extension.id()));
for (auto& process_extensions_pair : pending_active_extensions_)
process_extensions_pair.second.erase(extension.id());
}
//////////////////////////////////////////////////////////////////////////////
// static
RendererStartupHelper* RendererStartupHelperFactory::GetForBrowserContext(
BrowserContext* context) {
return static_cast<RendererStartupHelper*>(
GetInstance()->GetServiceForBrowserContext(context, true));
}
// static
RendererStartupHelperFactory* RendererStartupHelperFactory::GetInstance() {
return base::Singleton<RendererStartupHelperFactory>::get();
}
RendererStartupHelperFactory::RendererStartupHelperFactory()
: BrowserContextKeyedServiceFactory(
"RendererStartupHelper",
BrowserContextDependencyManager::GetInstance()) {
// No dependencies on other services.
}
RendererStartupHelperFactory::~RendererStartupHelperFactory() {}
KeyedService* RendererStartupHelperFactory::BuildServiceInstanceFor(
content::BrowserContext* context) const {
return new RendererStartupHelper(context);
}
BrowserContext* RendererStartupHelperFactory::GetBrowserContextToUse(
BrowserContext* context) const {
// Redirected in incognito.
return ExtensionsBrowserClient::Get()->GetOriginalContext(context);
}
bool RendererStartupHelperFactory::ServiceIsCreatedWithBrowserContext() const {
return true;
}
} // namespace extensions
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