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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.
#ifndef CHROME_BROWSER_UI_WEBUI_HELP_HELP_HANDLER_H_
#define CHROME_BROWSER_UI_WEBUI_HELP_HELP_HANDLER_H_
#include <string>
#include "base/compiler_specific.h"
#include "base/memory/weak_ptr.h"
#include "base/strings/string16.h"
#include "chrome/browser/ui/webui/help/version_updater.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;
}
// WebUI message handler for the help page.
class HelpHandler : public content::WebUIMessageHandler,
public content::NotificationObserver {
public:
HelpHandler();
~HelpHandler() override;
// WebUIMessageHandler implementation.
void RegisterMessages() override;
// Adds string values for the UI to |localized_strings|.
static void GetLocalizedValues(base::DictionaryValue* localized_strings);
// 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:
// Initializes querying values for the page.
void OnPageLoaded(const base::ListValue* args);
#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 RelaunchNow(const base::ListValue* args);
// Opens the feedback dialog. |args| must be empty.
void OpenFeedbackDialog(const base::ListValue* args);
// Opens the help page. |args| must be empty.
void OpenHelpPage(const base::ListValue* args);
#if defined(OS_CHROMEOS)
// Sets the release track version.
void SetChannel(const base::ListValue* args);
// Performs relaunch and powerwash.
void RelaunchAndPowerwash(const base::ListValue* args);
#endif
// Checks for and applies update.
void RequestUpdate(const base::ListValue* args);
// 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)
// Callbacks from VersionLoader.
void OnOSVersion(const std::string& version);
void OnOSFirmware(const std::string& firmware);
void OnCurrentChannel(const std::string& channel);
void OnTargetChannel(const std::string& channel);
// Callback for when the directory with the regulatory label image and alt
// text has been found.
void OnRegulatoryLabelDirFound(const base::FilePath& path);
// Callback for setting the regulatory label source.
void OnRegulatoryLabelImageFound(const base::FilePath& path);
// Callback for setting the regulatory label alt text.
void OnRegulatoryLabelTextRead(const std::string& text);
#endif
// Specialized instance of the VersionUpdater used to update the browser.
scoped_ptr<VersionUpdater> version_updater_;
// Used to observe notifications.
content::NotificationRegistrar registrar_;
// Used for callbacks.
base::WeakPtrFactory<HelpHandler> weak_factory_;
DISALLOW_COPY_AND_ASSIGN(HelpHandler);
};
#endif // CHROME_BROWSER_UI_WEBUI_HELP_HELP_HANDLER_H_
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