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// Copyright 2015 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 "ios/chrome/browser/ui/webui/flags_ui.h"
#include <string>
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/macros.h"
#include "base/memory/ref_counted_memory.h"
#include "base/strings/utf_string_conversions.h"
#include "base/values.h"
#include "components/flags_ui/flags_ui_constants.h"
#include "components/flags_ui/flags_ui_pref_names.h"
#include "components/flags_ui/pref_service_flags_storage.h"
#include "components/grit/components_resources.h"
#include "components/grit/components_scaled_resources.h"
#include "components/prefs/pref_registry_simple.h"
#include "components/prefs/pref_service.h"
#include "components/strings/grit/components_chromium_strings.h"
#include "components/strings/grit/components_google_chrome_strings.h"
#include "components/strings/grit/components_strings.h"
#include "components/version_info/version_info.h"
#include "ios/chrome/browser/about_flags.h"
#include "ios/chrome/browser/application_context.h"
#include "ios/chrome/browser/browser_state/chrome_browser_state.h"
#include "ios/chrome/browser/chrome_url_constants.h"
#include "ios/public/provider/web/web_ui_ios.h"
#include "ios/public/provider/web/web_ui_ios_message_handler.h"
#include "ios/web/public/web_ui_ios_data_source.h"
#include "ios/web/public/web_ui_ios_data_source.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/base/resource/resource_bundle.h"
namespace {
web::WebUIIOSDataSource* CreateFlagsUIHTMLSource(
BaseFlagsUI::FlagsUIKind flags_ui_kind) {
web::WebUIIOSDataSource* source = web::WebUIIOSDataSource::Create(
flags_ui_kind == BaseFlagsUI::FLAGS_UI_APPLE ? kChromeUIAppleFlagsHost
: kChromeUIFlagsHost);
if (flags_ui_kind == BaseFlagsUI::FLAGS_UI_APPLE) {
source->AddLocalizedString(flags_ui::kFlagsTableTitle,
IDS_FLAGS_UI_ALTERNATIVES_UI_TABLE_TITLE);
source->AddLocalizedString(
flags_ui::kFlagsNoExperimentsAvailable,
IDS_FLAGS_UI_ALTERNATIVES_UI_NO_EXPERIMENTS_AVAILABLE);
} else {
source->AddLocalizedString(flags_ui::kFlagsLongTitle,
IDS_FLAGS_UI_LONG_TITLE);
source->AddLocalizedString(flags_ui::kFlagsTableTitle,
IDS_FLAGS_UI_TABLE_TITLE);
}
source->AddLocalizedString(flags_ui::kFlagsWarningHeader,
IDS_FLAGS_UI_WARNING_HEADER);
source->AddLocalizedString(flags_ui::kFlagsBlurb, IDS_FLAGS_UI_WARNING_TEXT);
source->AddLocalizedString(flags_ui::kFlagsUnsupportedTableTitle,
IDS_FLAGS_UI_UNSUPPORTED_TABLE_TITLE);
source->AddLocalizedString(flags_ui::kFlagsNotSupported,
IDS_FLAGS_UI_NOT_AVAILABLE);
source->AddLocalizedString(flags_ui::kFlagsRestartNotice,
IDS_FLAGS_UI_RELAUNCH_NOTICE);
source->AddLocalizedString(flags_ui::kFlagsRestartButton,
IDS_FLAGS_UI_RELAUNCH_BUTTON);
source->AddLocalizedString(flags_ui::kResetAllButton,
IDS_FLAGS_UI_RESET_ALL_BUTTON);
source->AddLocalizedString(flags_ui::kDisable, IDS_FLAGS_UI_DISABLE);
source->AddLocalizedString(flags_ui::kEnable, IDS_FLAGS_UI_ENABLE);
source->SetJsonPath("strings.js");
source->AddResourcePath(flags_ui::kFlagsJS, IDR_FLAGS_UI_FLAGS_JS);
source->SetDefaultResource(flags_ui_kind == BaseFlagsUI::FLAGS_UI_APPLE
? IDR_APPLE_FLAGS_HTML
: IDR_FLAGS_UI_FLAGS_HTML);
return source;
}
////////////////////////////////////////////////////////////////////////////////
//
// FlagsDOMHandler
//
////////////////////////////////////////////////////////////////////////////////
// The handler for Javascript messages for the about:flags page.
class FlagsDOMHandler : public web::WebUIIOSMessageHandler {
public:
FlagsDOMHandler()
: access_(flags_ui::kGeneralAccessFlagsOnly),
experimental_features_requested_(false) {}
~FlagsDOMHandler() override {}
// Initializes the DOM handler with the provided flags storage and flags
// access. If there were flags experiments requested from javascript before
// this was called, it calls |HandleRequestExperimentalFeatures| again.
void Init(flags_ui::FlagsStorage* flags_storage, flags_ui::FlagAccess access);
// WebUIMessageHandler implementation.
void RegisterMessages() override;
// Callback for the "requestExperimentFeatures" message.
void HandleRequestExperimentalFeatures(const base::ListValue* args);
// Callback for the "enableExperimentalFeature" message.
void HandleEnableExperimentalFeatureMessage(const base::ListValue* args);
// Callback for the "restartBrowser" message. Restores all tabs on restart.
void HandleRestartBrowser(const base::ListValue* args);
// Callback for the "resetAllFlags" message.
void HandleResetAllFlags(const base::ListValue* args);
private:
scoped_ptr<flags_ui::FlagsStorage> flags_storage_;
flags_ui::FlagAccess access_;
bool experimental_features_requested_;
DISALLOW_COPY_AND_ASSIGN(FlagsDOMHandler);
};
void FlagsDOMHandler::RegisterMessages() {
web_ui()->RegisterMessageCallback(
flags_ui::kRequestExperimentalFeatures,
base::Bind(&FlagsDOMHandler::HandleRequestExperimentalFeatures,
base::Unretained(this)));
web_ui()->RegisterMessageCallback(
flags_ui::kEnableExperimentalFeature,
base::Bind(&FlagsDOMHandler::HandleEnableExperimentalFeatureMessage,
base::Unretained(this)));
web_ui()->RegisterMessageCallback(
flags_ui::kRestartBrowser,
base::Bind(&FlagsDOMHandler::HandleRestartBrowser,
base::Unretained(this)));
web_ui()->RegisterMessageCallback(
flags_ui::kResetAllFlags,
base::Bind(&FlagsDOMHandler::HandleResetAllFlags,
base::Unretained(this)));
}
void FlagsDOMHandler::Init(flags_ui::FlagsStorage* flags_storage,
flags_ui::FlagAccess access) {
flags_storage_.reset(flags_storage);
access_ = access;
if (experimental_features_requested_)
HandleRequestExperimentalFeatures(NULL);
}
void FlagsDOMHandler::HandleRequestExperimentalFeatures(
const base::ListValue* args) {
experimental_features_requested_ = true;
// Bail out if the handler hasn't been initialized yet. The request will be
// handled after the initialization.
if (!flags_storage_)
return;
base::DictionaryValue results;
scoped_ptr<base::ListValue> supported_features(new base::ListValue);
scoped_ptr<base::ListValue> unsupported_features(new base::ListValue);
GetFlagFeatureEntries(flags_storage_.get(), access_, supported_features.get(),
unsupported_features.get());
results.Set(flags_ui::kSupportedFeatures, supported_features.release());
results.Set(flags_ui::kUnsupportedFeatures, unsupported_features.release());
// Cannot restart the browser on iOS.
results.SetBoolean(flags_ui::kNeedsRestart, false);
results.SetBoolean(flags_ui::kShowOwnerWarning,
access_ == flags_ui::kGeneralAccessFlagsOnly);
results.SetBoolean(flags_ui::kShowBetaChannelPromotion, false);
results.SetBoolean(flags_ui::kShowDevChannelPromotion, false);
web_ui()->CallJavascriptFunction(flags_ui::kReturnExperimentalFeatures,
results);
}
void FlagsDOMHandler::HandleEnableExperimentalFeatureMessage(
const base::ListValue* args) {
DCHECK(flags_storage_);
DCHECK_EQ(2u, args->GetSize());
if (args->GetSize() != 2)
return;
std::string entry_internal_name;
std::string enable_str;
if (!args->GetString(0, &entry_internal_name) ||
!args->GetString(1, &enable_str))
return;
SetFeatureEntryEnabled(flags_storage_.get(), entry_internal_name,
enable_str == "true");
}
void FlagsDOMHandler::HandleRestartBrowser(const base::ListValue* args) {
NOTREACHED();
}
void FlagsDOMHandler::HandleResetAllFlags(const base::ListValue* args) {
DCHECK(flags_storage_);
ResetAllFlags(flags_storage_.get());
}
} // namespace
///////////////////////////////////////////////////////////////////////////////
//
// BaseFlagsUI
//
///////////////////////////////////////////////////////////////////////////////
BaseFlagsUI::BaseFlagsUI(web::WebUIIOS* web_ui, FlagsUIKind flags_ui_kind)
: web::WebUIIOSController(web_ui), weak_factory_(this) {
Initialize(web_ui, flags_ui_kind);
}
void BaseFlagsUI::Initialize(web::WebUIIOS* web_ui, FlagsUIKind flags_ui_kind) {
FlagsDOMHandler* handler = new FlagsDOMHandler();
web_ui->AddMessageHandler(handler);
flags_ui::FlagAccess flag_access = flags_ui::kOwnerAccessToFlags;
if (flags_ui_kind == FLAGS_UI_APPLE)
flag_access = flags_ui::kAppleReviewAccessToFlags;
handler->Init(new flags_ui::PrefServiceFlagsStorage(
GetApplicationContext()->GetLocalState()),
flag_access);
// Set up the about:flags source.
web::WebUIIOSDataSource::Add(ios::ChromeBrowserState::FromWebUIIOS(web_ui),
CreateFlagsUIHTMLSource(flags_ui_kind));
}
BaseFlagsUI::~BaseFlagsUI() {}
// static
base::RefCountedMemory* BaseFlagsUI::GetFaviconResourceBytes(
ui::ScaleFactor scale_factor) {
return ResourceBundle::GetSharedInstance().LoadDataResourceBytesForScale(
IDR_FLAGS_FAVICON, scale_factor);
}
///////////////////////////////////////////////////////////////////////////////
//
// FlagsUI
//
///////////////////////////////////////////////////////////////////////////////
FlagsUI::FlagsUI(web::WebUIIOS* web_ui)
: BaseFlagsUI(web_ui, BaseFlagsUI::FLAGS_UI_GENERIC) {}
FlagsUI::~FlagsUI() {}
///////////////////////////////////////////////////////////////////////////////
//
// AppleFlagsUI
//
///////////////////////////////////////////////////////////////////////////////
AppleFlagsUI::AppleFlagsUI(web::WebUIIOS* web_ui)
: BaseFlagsUI(web_ui, BaseFlagsUI::FLAGS_UI_APPLE) {}
AppleFlagsUI::~AppleFlagsUI() {}
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