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// Copyright (c) 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 "chrome/browser/extensions/settings_api_helpers.h"
#include "chrome/browser/extensions/api/preference/preference_api.h"
#include "chrome/common/pref_names.h"
#include "components/search_engines/search_engines_pref_names.h"
#include "extensions/browser/extension_pref_value_map.h"
#include "extensions/browser/extension_pref_value_map_factory.h"
#include "extensions/browser/extension_registry.h"
#include "extensions/common/extension_set.h"
namespace extensions {
namespace {
// Returns which |extension| (if any) is overriding a particular |type| of
// setting.
const Extension* FindOverridingExtension(
content::BrowserContext* browser_context,
SettingsApiOverrideType type) {
const ExtensionSet& extensions =
ExtensionRegistry::Get(browser_context)->enabled_extensions();
for (ExtensionSet::const_iterator it = extensions.begin();
it != extensions.end();
++it) {
const SettingsOverrides* settings = SettingsOverrides::Get(it->get());
if (settings) {
if (type == BUBBLE_TYPE_HOME_PAGE && !settings->homepage)
continue;
if (type == BUBBLE_TYPE_STARTUP_PAGES && settings->startup_pages.empty())
continue;
if (type == BUBBLE_TYPE_SEARCH_ENGINE && !settings->search_engine)
continue;
std::string key;
switch (type) {
case BUBBLE_TYPE_HOME_PAGE:
key = prefs::kHomePage;
break;
case BUBBLE_TYPE_STARTUP_PAGES:
key = prefs::kRestoreOnStartup;
break;
case BUBBLE_TYPE_SEARCH_ENGINE:
key = prefs::kDefaultSearchProviderEnabled;
break;
}
// Found an extension overriding the current type, check if primary.
PreferenceAPI* preference_api = PreferenceAPI::Get(browser_context);
if (preference_api && // Expected to be NULL in unit tests.
!preference_api->DoesExtensionControlPref((*it)->id(), key, NULL))
continue; // Not primary.
// Found the primary extension.
return it->get();
}
}
return NULL;
}
} // namespace
const Extension* GetExtensionOverridingHomepage(
content::BrowserContext* browser_context) {
return FindOverridingExtension(browser_context, BUBBLE_TYPE_HOME_PAGE);
}
const Extension* GetExtensionOverridingStartupPages(
content::BrowserContext* browser_context) {
return FindOverridingExtension(browser_context, BUBBLE_TYPE_STARTUP_PAGES);
}
const Extension* GetExtensionOverridingSearchEngine(
content::BrowserContext* browser_context) {
return FindOverridingExtension(browser_context, BUBBLE_TYPE_SEARCH_ENGINE);
}
const Extension* GetExtensionOverridingProxy(
content::BrowserContext* browser_context) {
ExtensionPrefValueMap* extension_prefs_value_map =
ExtensionPrefValueMapFactory::GetForBrowserContext(browser_context);
if (!extension_prefs_value_map)
return NULL; // Can be null during testing.
std::string extension_id =
extension_prefs_value_map->GetExtensionControllingPref(prefs::kProxy);
if (extension_id.empty())
return NULL;
return ExtensionRegistry::Get(browser_context)->GetExtensionById(
extension_id, ExtensionRegistry::ENABLED);
}
} // namespace extensions
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