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// Copyright (c) 2012 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 "chrome/browser/extensions/api/preference/preference_helpers.h"
#include <memory>
#include <utility>
#include "base/json/json_writer.h"
#include "base/values.h"
#include "chrome/browser/extensions/api/preference/preference_api.h"
#include "chrome/browser/extensions/extension_util.h"
#include "chrome/browser/profiles/profile.h"
#include "components/prefs/pref_service.h"
#include "extensions/browser/event_router.h"
#include "extensions/browser/extension_prefs.h"
#include "extensions/browser/extension_registry.h"
#include "extensions/browser/extension_util.h"
#include "extensions/common/manifest_handlers/incognito_info.h"
#include "extensions/common/permissions/permissions_data.h"
namespace extensions {
namespace preference_helpers {
namespace {
const char kIncognitoPersistent[] = "incognito_persistent";
const char kIncognitoSessionOnly[] = "incognito_session_only";
const char kRegular[] = "regular";
const char kRegularOnly[] = "regular_only";
const char kLevelOfControlKey[] = "levelOfControl";
const char kNotControllable[] = "not_controllable";
const char kControlledByOtherExtensions[] = "controlled_by_other_extensions";
const char kControllableByThisExtension[] = "controllable_by_this_extension";
const char kControlledByThisExtension[] = "controlled_by_this_extension";
} // namespace
bool StringToScope(const std::string& s,
ExtensionPrefsScope* scope) {
if (s == kRegular)
*scope = kExtensionPrefsScopeRegular;
else if (s == kRegularOnly)
*scope = kExtensionPrefsScopeRegularOnly;
else if (s == kIncognitoPersistent)
*scope = kExtensionPrefsScopeIncognitoPersistent;
else if (s == kIncognitoSessionOnly)
*scope = kExtensionPrefsScopeIncognitoSessionOnly;
else
return false;
return true;
}
const char* GetLevelOfControl(
Profile* profile,
const std::string& extension_id,
const std::string& browser_pref,
bool incognito) {
PrefService* prefs = incognito ? profile->GetOffTheRecordPrefs()
: profile->GetPrefs();
bool from_incognito = false;
bool* from_incognito_ptr = incognito ? &from_incognito : nullptr;
const PrefService::Preference* pref = prefs->FindPreference(browser_pref);
if (!pref->IsExtensionModifiable())
return kNotControllable;
if (PreferenceAPI::Get(profile)->DoesExtensionControlPref(
extension_id,
browser_pref,
from_incognito_ptr)) {
return kControlledByThisExtension;
}
if (PreferenceAPI::Get(profile)->CanExtensionControlPref(extension_id,
browser_pref,
incognito)) {
return kControllableByThisExtension;
}
return kControlledByOtherExtensions;
}
void DispatchEventToExtensions(Profile* profile,
events::HistogramValue histogram_value,
const std::string& event_name,
base::ListValue* args,
APIPermission::ID permission,
bool incognito,
const std::string& browser_pref) {
EventRouter* router = EventRouter::Get(profile);
if (!router || !router->HasEventListener(event_name))
return;
for (const scoped_refptr<const extensions::Extension>& extension :
ExtensionRegistry::Get(profile)->enabled_extensions()) {
// TODO(bauerb): Only iterate over registered event listeners.
if (router->ExtensionHasEventListener(extension->id(), event_name) &&
extension->permissions_data()->HasAPIPermission(permission) &&
(!incognito || util::IsIncognitoEnabled(extension->id(), profile))) {
// Inject level of control key-value.
base::DictionaryValue* dict;
bool rv = args->GetDictionary(0, &dict);
DCHECK(rv);
std::string level_of_control =
GetLevelOfControl(profile, extension->id(), browser_pref, incognito);
dict->SetString(kLevelOfControlKey, level_of_control);
// If the extension is in incognito split mode,
// a) incognito pref changes are visible only to the incognito tabs
// b) regular pref changes are visible only to the incognito tabs if the
// incognito pref has not already been set
Profile* restrict_to_profile = nullptr;
if (IncognitoInfo::IsSplitMode(extension.get())) {
if (incognito) { // Handle case a).
// If off the record profile does not exist, there should be no
// extensions running in incognito at this time, and consequentially
// no need to dispatch an event restricted to an incognito extension.
// Furthermore, avoid calling GetPrimaryOTRProfile() in this case -
// this method creates off the record profile if one does not exist.
// Unnecessarily creating off the record profile is undesirable, and
// can lead to a crash if incognito is disallowed for the current
// profile (see https://crbug.com/796814).
if (!profile->HasPrimaryOTRProfile())
continue;
restrict_to_profile = profile->GetPrimaryOTRProfile();
} else { // Handle case b).
bool controlled_from_incognito = false;
bool controlled_by_extension =
PreferenceAPI::Get(profile)->DoesExtensionControlPref(
extension->id(), browser_pref, &controlled_from_incognito);
if (controlled_by_extension && controlled_from_incognito)
restrict_to_profile = profile;
}
}
std::unique_ptr<base::ListValue> args_copy(args->DeepCopy());
auto event =
std::make_unique<Event>(histogram_value, event_name,
std::move(args_copy), restrict_to_profile);
router->DispatchEventToExtension(extension->id(), std::move(event));
}
}
}
} // namespace preference_helpers
} // namespace extensions
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