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// Copyright 2013 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/extension_util.h"
#include "base/command_line.h"
#include "chrome/browser/extensions/extension_service.h"
#include "chrome/browser/extensions/extension_sync_service.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/common/extensions/sync_helper.h"
#include "content/public/browser/site_instance.h"
#include "extensions/browser/extension_prefs.h"
#include "extensions/browser/extension_registry.h"
#include "extensions/browser/extension_system.h"
#include "extensions/common/extension.h"
#include "extensions/common/manifest.h"
#include "extensions/common/manifest_handlers/incognito_info.h"
namespace extensions {
namespace util {
bool IsIncognitoEnabled(const std::string& extension_id,
content::BrowserContext* context) {
const Extension* extension = ExtensionRegistry::Get(context)->
GetExtensionById(extension_id, ExtensionRegistry::ENABLED);
if (extension) {
if (!extension->can_be_incognito_enabled())
return false;
// If this is an existing component extension we always allow it to
// work in incognito mode.
if (extension->location() == Manifest::COMPONENT)
return true;
if (extension->force_incognito_enabled())
return true;
}
return ExtensionPrefs::Get(context)->IsIncognitoEnabled(extension_id);
}
void SetIsIncognitoEnabled(const std::string& extension_id,
content::BrowserContext* context,
bool enabled) {
ExtensionService* service =
ExtensionSystem::Get(context)->extension_service();
CHECK(service);
const Extension* extension = service->GetInstalledExtension(extension_id);
if (extension) {
if (!extension->can_be_incognito_enabled())
return;
if (extension->location() == Manifest::COMPONENT) {
// This shouldn't be called for component extensions unless it is called
// by sync, for syncable component extensions.
// See http://crbug.com/112290 and associated CLs for the sordid history.
DCHECK(sync_helper::IsSyncable(extension));
// If we are here, make sure the we aren't trying to change the value.
DCHECK_EQ(enabled, IsIncognitoEnabled(extension_id, service->profile()));
return;
}
}
ExtensionPrefs* extension_prefs = service->extension_prefs();
// Broadcast unloaded and loaded events to update browser state. Only bother
// if the value changed and the extension is actually enabled, since there is
// no UI otherwise.
bool old_enabled = extension_prefs->IsIncognitoEnabled(extension_id);
if (enabled == old_enabled)
return;
extension_prefs->SetIsIncognitoEnabled(extension_id, enabled);
bool extension_is_enabled = service->extensions()->Contains(extension_id);
// When we reload the extension the ID may be invalidated if we've passed it
// by const ref everywhere. Make a copy to be safe.
std::string id = extension_id;
if (extension_is_enabled)
service->ReloadExtension(id);
// Reloading the extension invalidates the |extension| pointer.
extension = service->GetInstalledExtension(id);
if (extension) {
ExtensionSyncService::Get(service->profile())->
SyncExtensionChangeIfNeeded(*extension);
}
}
bool CanCrossIncognito(const Extension* extension,
content::BrowserContext* context) {
// We allow the extension to see events and data from another profile iff it
// uses "spanning" behavior and it has incognito access. "split" mode
// extensions only see events for a matching profile.
CHECK(extension);
return IsIncognitoEnabled(extension->id(), context) &&
!IncognitoInfo::IsSplitMode(extension);
}
bool CanLoadInIncognito(const Extension* extension,
content::BrowserContext* context) {
CHECK(extension);
if (extension->is_hosted_app())
return true;
// Packaged apps and regular extensions need to be enabled specifically for
// incognito (and split mode should be set).
return IncognitoInfo::IsSplitMode(extension) &&
IsIncognitoEnabled(extension->id(), context);
}
bool AllowFileAccess(const std::string& extension_id,
content::BrowserContext* context) {
return CommandLine::ForCurrentProcess()->HasSwitch(
switches::kDisableExtensionsFileAccessCheck) ||
ExtensionPrefs::Get(context)->AllowFileAccess(extension_id);
}
void SetAllowFileAccess(const std::string& extension_id,
content::BrowserContext* context,
bool allow) {
ExtensionService* service =
ExtensionSystem::Get(context)->extension_service();
CHECK(service);
// Reload to update browser state. Only bother if the value changed and the
// extension is actually enabled, since there is no UI otherwise.
if (allow == AllowFileAccess(extension_id, context))
return;
service->extension_prefs()->SetAllowFileAccess(extension_id, allow);
bool extension_is_enabled = service->extensions()->Contains(extension_id);
if (extension_is_enabled)
service->ReloadExtension(extension_id);
}
bool IsAppLaunchable(const std::string& extension_id,
content::BrowserContext* context) {
return !(ExtensionPrefs::Get(context)->GetDisableReasons(extension_id) &
Extension::DISABLE_UNSUPPORTED_REQUIREMENT);
}
bool IsAppLaunchableWithoutEnabling(const std::string& extension_id,
content::BrowserContext* context) {
return ExtensionRegistry::Get(context)->GetExtensionById(
extension_id, ExtensionRegistry::ENABLED) != NULL;
}
bool IsExtensionIdle(const std::string& extension_id,
content::BrowserContext* context) {
ProcessManager* process_manager =
ExtensionSystem::Get(context)->process_manager();
DCHECK(process_manager);
ExtensionHost* host =
process_manager->GetBackgroundHostForExtension(extension_id);
if (host)
return false;
content::SiteInstance* site_instance = process_manager->GetSiteInstanceForURL(
Extension::GetBaseURLFromExtensionId(extension_id));
if (site_instance && site_instance->HasProcess())
return false;
return process_manager->GetRenderViewHostsForExtension(extension_id).empty();
}
bool IsExtensionInstalledPermanently(const std::string& extension_id,
content::BrowserContext* context) {
const Extension* extension = ExtensionRegistry::Get(context)->
GetExtensionById(extension_id, ExtensionRegistry::EVERYTHING);
return extension && !extension->is_ephemeral();
}
} // namespace util
} // namespace extensions
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