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// Copyright 2016 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.
#ifndef CHROME_BROWSER_UI_WEBUI_SETTINGS_ABOUT_HANDLER_H_
#define CHROME_BROWSER_UI_WEBUI_SETTINGS_ABOUT_HANDLER_H_
#include <memory>
#include <string>
#include "base/compiler_specific.h"
#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "base/strings/string16.h"
#include "build/build_config.h"
#include "chrome/browser/ui/webui/help/version_updater.h"
#include "chrome/browser/ui/webui/settings/settings_page_ui_handler.h"
#include "components/policy/core/common/policy_service.h"
#include "content/public/browser/notification_observer.h"
#include "content/public/browser/notification_registrar.h"
#include "content/public/browser/web_ui_message_handler.h"
#if defined(OS_CHROMEOS)
#include "base/task/cancelable_task_tracker.h"
#include "chromeos/system/version_loader.h"
#endif // defined(OS_CHROMEOS)
namespace base {
class DictionaryValue;
class FilePath;
class ListValue;
}
namespace content {
class WebUIDataSource;
}
class Profile;
namespace settings {
// WebUI message handler for the help page.
class AboutHandler : public settings::SettingsPageUIHandler,
public content::NotificationObserver {
public:
AboutHandler();
~AboutHandler() override;
static AboutHandler* Create(content::WebUIDataSource* html_source,
Profile* profile);
// WebUIMessageHandler implementation.
void RegisterMessages() override;
void OnJavascriptAllowed() override;
void OnJavascriptDisallowed() override;
// NotificationObserver implementation.
void Observe(int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) override;
// Returns the browser version as a string.
static base::string16 BuildBrowserVersionString();
private:
void OnDeviceAutoUpdatePolicyChanged(const base::Value* previous_policy,
const base::Value* current_policy);
// Called once the JS page is ready to be called, serves as a signal to the
// handler to register C++ observers.
void HandlePageReady(const base::ListValue* args);
// Called once when the page has loaded. On ChromeOS, this gets the current
// update status. On other platforms, it will request and perform an update
// (if one is available).
void HandleRefreshUpdateStatus(const base::ListValue* args);
void RefreshUpdateStatus();
#if defined(OS_MACOSX)
// Promotes the updater for all users.
void PromoteUpdater(const base::ListValue* args);
#endif
// Relaunches the browser. |args| must be empty.
void HandleRelaunchNow(const base::ListValue* args);
// Opens the feedback dialog. |args| must be empty.
void HandleOpenFeedbackDialog(const base::ListValue* args);
// Opens the help page. |args| must be empty.
void HandleOpenHelpPage(const base::ListValue* args);
#if defined(OS_CHROMEOS)
// Sets the release track version.
void HandleSetChannel(const base::ListValue* args);
// Checks for and applies update, triggered by JS.
void HandleRequestUpdate(const base::ListValue* args);
// Retrieves OS, ARC and firmware versions.
void HandleGetVersionInfo(const base::ListValue* args);
void OnGetVersionInfoReady(
std::string callback_id,
std::unique_ptr<base::DictionaryValue> version_info);
void HandleGetCurrentChannel(const base::ListValue* args);
void HandleGetTargetChannel(const base::ListValue* args);
// C++ callback for either of |HandleGetCurrentChannel| or
// |HandleGetTargetChannel|,
void OnGetChannelReady(std::string callback_id, const std::string& channel);
#endif
// Checks for and applies update.
void RequestUpdate();
// Callback method which forwards status updates to the page.
void SetUpdateStatus(VersionUpdater::Status status,
int progress,
const base::string16& fail_message);
#if defined(OS_MACOSX)
// Callback method which forwards promotion state to the page.
void SetPromotionState(VersionUpdater::PromotionState state);
#endif
#if defined(OS_CHROMEOS)
void HandleGetRegulatoryInfo(const base::ListValue* args);
// Callback for when the directory with the regulatory label image and alt
// text has been found.
void OnRegulatoryLabelDirFound(std::string callback_id,
const base::FilePath& path);
// Callback for when the regulatory text has been read.
void OnRegulatoryLabelTextRead(std::string callback_id,
const base::FilePath& path,
const std::string& text);
#endif
// Specialized instance of the VersionUpdater used to update the browser.
std::unique_ptr<VersionUpdater> version_updater_;
// Used to observe notifications.
content::NotificationRegistrar registrar_;
// Used to observe changes in the |kDeviceAutoUpdateDisabled| policy.
std::unique_ptr<policy::PolicyChangeRegistrar> policy_registrar_;
// Used for callbacks.
base::WeakPtrFactory<AboutHandler> weak_factory_;
DISALLOW_COPY_AND_ASSIGN(AboutHandler);
};
} // namespace settings
#endif // CHROME_BROWSER_UI_WEBUI_SETTINGS_ABOUT_HANDLER_H_