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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.
#ifndef CHROME_BROWSER_UI_WEBUI_TRANSLATE_INTERNALS_TRANSLATE_INTERNALS_HANDLER_H_
#define CHROME_BROWSER_UI_WEBUI_TRANSLATE_INTERNALS_TRANSLATE_INTERNALS_HANDLER_H_
#include <string>
#include "base/callback_list.h"
#include "base/memory/scoped_ptr.h"
#include "components/translate/core/browser/translate_language_list.h"
#include "components/translate/core/browser/translate_manager.h"
#include "content/public/browser/notification_observer.h"
#include "content/public/browser/notification_registrar.h"
#include "content/public/browser/web_ui_message_handler.h"
#include "content/public/common/webplugininfo.h"
namespace translate {
struct LanguageDetectionDetails;
struct TranslateErrorDetails;
struct TranslateEventDetails;
}
namespace base {
class DictionaryValue;
class ListValue;
class Value;
}
namespace content {
class NotificationDetails;
class NotificationSource;
}
// The handler class for TranslateInternals page operations.
class TranslateInternalsHandler : public content::WebUIMessageHandler,
public content::NotificationObserver {
public:
TranslateInternalsHandler();
~TranslateInternalsHandler() override;
// content::WebUIMessageHandler methods:
void RegisterMessages() override;
private:
// content::NotificationObserver implementation:
void Observe(int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) override;
// Callback for translate errors.
void OnTranslateError(const translate::TranslateErrorDetails& details);
// Callback for translate events.
virtual void OnTranslateEvent(
const translate::TranslateEventDetails& details);
// Handles the Javascript message 'removePrefItem'. This message is sent
// when UI requests to remove an item in the preference.
void OnRemovePrefItem(const base::ListValue* args);
// Handles the Javascript message 'requestInfo'. This message is sent
// when UI needs to show information concerned with the translation.
// For now, this returns only prefs to Javascript.
// |args| is not used.
void OnRequestInfo(const base::ListValue* args);
// Sends a messsage to Javascript.
void SendMessageToJs(const std::string& message, const base::Value& value);
// Sends the current preference to Javascript.
void SendPrefsToJs();
// Sends the languages currently supported by the server to JavaScript.
void SendSupportedLanguagesToJs();
// Subscription for translate events coming from the translate language list.
scoped_ptr<translate::TranslateLanguageList::EventCallbackList::Subscription>
event_subscription_;
// Subscription for translate errors coming from the translate manager.
scoped_ptr<
translate::TranslateManager::TranslateErrorCallbackList::Subscription>
error_subscription_;
content::NotificationRegistrar notification_registrar_;
DISALLOW_COPY_AND_ASSIGN(TranslateInternalsHandler);
};
#endif // CHROME_BROWSER_UI_WEBUI_TRANSLATE_INTERNALS_TRANSLATE_INTERNALS_HANDLER_H_
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