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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/ui/webui/flags_ui.h"
#include <string>
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/memory/ref_counted_memory.h"
#include "base/prefs/pref_registry_simple.h"
#include "base/prefs/pref_service.h"
#include "base/utf_string_conversions.h"
#include "base/values.h"
#include "chrome/browser/about_flags.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/lifetime/application_lifetime.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/common/pref_names.h"
#include "chrome/common/url_constants.h"
#include "content/public/browser/web_contents.h"
#include "content/public/browser/web_ui.h"
#include "content/public/browser/web_ui_data_source.h"
#include "content/public/browser/web_ui_message_handler.h"
#include "grit/browser_resources.h"
#include "grit/chromium_strings.h"
#include "grit/generated_resources.h"
#include "grit/theme_resources.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/base/resource/resource_bundle.h"
#if defined(OS_CHROMEOS)
#include "base/chromeos/chromeos_version.h"
#include "chrome/browser/chromeos/login/user_manager.h"
#include "chrome/browser/chromeos/settings/cros_settings.h"
#include "components/user_prefs/pref_registry_syncable.h"
#endif
using content::WebContents;
using content::WebUIMessageHandler;
namespace {
content::WebUIDataSource* CreateFlagsUIHTMLSource() {
content::WebUIDataSource* source =
content::WebUIDataSource::Create(chrome::kChromeUIFlagsHost);
source->SetUseJsonJSFormatV2();
source->AddLocalizedString("flagsLongTitle", IDS_FLAGS_LONG_TITLE);
source->AddLocalizedString("flagsTableTitle", IDS_FLAGS_TABLE_TITLE);
source->AddLocalizedString("flagsNoExperimentsAvailable",
IDS_FLAGS_NO_EXPERIMENTS_AVAILABLE);
source->AddLocalizedString("flagsWarningHeader", IDS_FLAGS_WARNING_HEADER);
source->AddLocalizedString("flagsBlurb", IDS_FLAGS_WARNING_TEXT);
source->AddLocalizedString("flagsNotSupported", IDS_FLAGS_NOT_AVAILABLE);
source->AddLocalizedString("flagsRestartNotice", IDS_FLAGS_RELAUNCH_NOTICE);
source->AddLocalizedString("flagsRestartButton", IDS_FLAGS_RELAUNCH_BUTTON);
source->AddLocalizedString("resetAllButton", IDS_FLAGS_RESET_ALL_BUTTON);
source->AddLocalizedString("disable", IDS_FLAGS_DISABLE);
source->AddLocalizedString("enable", IDS_FLAGS_ENABLE);
#if defined(OS_CHROMEOS)
if (!chromeos::UserManager::Get()->IsCurrentUserOwner() &&
base::chromeos::IsRunningOnChromeOS()) {
// Set the strings to show which user can actually change the flags.
std::string owner;
chromeos::CrosSettings::Get()->GetString(chromeos::kDeviceOwner, &owner);
source->AddString("ownerWarning",
l10n_util::GetStringFUTF16(IDS_SYSTEM_FLAGS_OWNER_ONLY,
UTF8ToUTF16(owner)));
} else {
source->AddString("ownerWarning", string16());
}
#endif
source->SetJsonPath("strings.js");
source->AddResourcePath("flags.js", IDR_FLAGS_JS);
source->SetDefaultResource(IDR_FLAGS_HTML);
return source;
}
////////////////////////////////////////////////////////////////////////////////
//
// FlagsDOMHandler
//
////////////////////////////////////////////////////////////////////////////////
// The handler for Javascript messages for the about:flags page.
class FlagsDOMHandler : public WebUIMessageHandler {
public:
explicit FlagsDOMHandler(PrefService* prefs, about_flags::FlagAccess access)
: prefs_(prefs), access_(access) {}
virtual ~FlagsDOMHandler() {}
// WebUIMessageHandler implementation.
virtual void RegisterMessages() OVERRIDE;
// Callback for the "requestFlagsExperiments" message.
void HandleRequestFlagsExperiments(const ListValue* args);
// Callback for the "enableFlagsExperiment" message.
void HandleEnableFlagsExperimentMessage(const ListValue* args);
// Callback for the "restartBrowser" message. Restores all tabs on restart.
void HandleRestartBrowser(const ListValue* args);
// Callback for the "resetAllFlags" message.
void HandleResetAllFlags(const ListValue* args);
private:
PrefService* prefs_;
about_flags::FlagAccess access_;
DISALLOW_COPY_AND_ASSIGN(FlagsDOMHandler);
};
void FlagsDOMHandler::RegisterMessages() {
web_ui()->RegisterMessageCallback("requestFlagsExperiments",
base::Bind(&FlagsDOMHandler::HandleRequestFlagsExperiments,
base::Unretained(this)));
web_ui()->RegisterMessageCallback("enableFlagsExperiment",
base::Bind(&FlagsDOMHandler::HandleEnableFlagsExperimentMessage,
base::Unretained(this)));
web_ui()->RegisterMessageCallback("restartBrowser",
base::Bind(&FlagsDOMHandler::HandleRestartBrowser,
base::Unretained(this)));
web_ui()->RegisterMessageCallback("resetAllFlags",
base::Bind(&FlagsDOMHandler::HandleResetAllFlags,
base::Unretained(this)));
}
void FlagsDOMHandler::HandleRequestFlagsExperiments(const ListValue* args) {
DictionaryValue results;
results.Set("flagsExperiments",
about_flags::GetFlagsExperimentsData(prefs_, access_));
results.SetBoolean("needsRestart",
about_flags::IsRestartNeededToCommitChanges());
web_ui()->CallJavascriptFunction("returnFlagsExperiments", results);
}
void FlagsDOMHandler::HandleEnableFlagsExperimentMessage(
const ListValue* args) {
DCHECK_EQ(2u, args->GetSize());
if (args->GetSize() != 2)
return;
std::string experiment_internal_name;
std::string enable_str;
if (!args->GetString(0, &experiment_internal_name) ||
!args->GetString(1, &enable_str))
return;
about_flags::SetExperimentEnabled(
prefs_,
experiment_internal_name,
enable_str == "true");
}
void FlagsDOMHandler::HandleRestartBrowser(const ListValue* args) {
chrome::AttemptRestart();
}
void FlagsDOMHandler::HandleResetAllFlags(const ListValue* args) {
about_flags::ResetAllFlags(g_browser_process->local_state());
}
} // namespace
///////////////////////////////////////////////////////////////////////////////
//
// FlagsUI
//
///////////////////////////////////////////////////////////////////////////////
FlagsUI::FlagsUI(content::WebUI* web_ui)
: WebUIController(web_ui),
ALLOW_THIS_IN_INITIALIZER_LIST(weak_factory_(this)) {
Profile* profile = Profile::FromWebUI(web_ui);
#if defined(OS_CHROMEOS)
chromeos::DeviceSettingsService::Get()->GetOwnershipStatusAsync(
base::Bind(&FlagsUI::FinishInitialization,
weak_factory_.GetWeakPtr(), profile));
#else
web_ui->AddMessageHandler(
new FlagsDOMHandler(g_browser_process->local_state(),
about_flags::kOwnerAccessToFlags));
// Set up the about:flags source.
content::WebUIDataSource::Add(profile, CreateFlagsUIHTMLSource());
#endif
}
FlagsUI::~FlagsUI() {
}
// static
base::RefCountedMemory* FlagsUI::GetFaviconResourceBytes(
ui::ScaleFactor scale_factor) {
return ResourceBundle::GetSharedInstance().
LoadDataResourceBytesForScale(IDR_FLAGS_FAVICON, scale_factor);
}
// static
void FlagsUI::RegisterPrefs(PrefRegistrySimple* registry) {
registry->RegisterListPref(prefs::kEnabledLabsExperiments);
}
#if defined(OS_CHROMEOS)
// static
void FlagsUI::RegisterUserPrefs(PrefRegistrySyncable* registry) {
registry->RegisterListPref(prefs::kEnabledLabsExperiments,
PrefRegistrySyncable::UNSYNCABLE_PREF);
}
void FlagsUI::FinishInitialization(
Profile* profile,
chromeos::DeviceSettingsService::OwnershipStatus status,
bool current_user_is_owner) {
// On Chrome OS the owner can set system wide flags and other users can only
// set flags for their own session.
if (!current_user_is_owner) {
web_ui()->AddMessageHandler(
new FlagsDOMHandler(profile->GetPrefs(),
about_flags::kGeneralAccessFlagsOnly));
} else {
web_ui()->AddMessageHandler(
new FlagsDOMHandler(g_browser_process->local_state(),
about_flags::kOwnerAccessToFlags));
// If the owner managed to set the flags pref on his own profile clear it
// because it will never be accessible anymore.
if (profile->GetPrefs()->HasPrefPath(prefs::kEnabledLabsExperiments))
profile->GetPrefs()->ClearPref(prefs::kEnabledLabsExperiments);
}
// Set up the about:flags source.
content::WebUIDataSource::Add(profile, CreateFlagsUIHTMLSource());
}
#endif
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