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// Copyright (c) 2010 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_TRANSLATE_TRANSLATE_MANAGER_H_
#define CHROME_BROWSER_TRANSLATE_TRANSLATE_MANAGER_H_
#include <map>
#include <set>
#include <string>
#include "base/singleton.h"
#include "base/task.h"
#include "chrome/browser/translate/translate_infobars_delegates.h"
#include "chrome/common/notification_observer.h"
#include "chrome/common/notification_registrar.h"
#include "chrome/common/translate_errors.h"
class GURL;
class PrefService;
class TabContents;
// The TranslateManager class is responsible for showing an info-bar when a page
// in a language different than the user language is loaded. It triggers the
// page translation the user requests.
// It is a singleton.
class TranslateManager : public NotificationObserver {
public:
virtual ~TranslateManager();
// NotificationObserver implementation:
virtual void Observe(NotificationType type,
const NotificationSource& source,
const NotificationDetails& details);
// Convenience method to know if a tab is showing a translate infobar.
static bool IsShowingTranslateInfobar(TabContents* tab);
// Returns true if the URL can be translated, if it is not an internal URL
// (chrome:// and others).
static bool IsTranslatableURL(const GURL& url);
// Used by unit-test to enable the TranslateManager for testing purpose.
static void set_test_enabled(bool enabled) { test_enabled_ = enabled; }
static bool test_enabled() { return test_enabled_; }
protected:
TranslateManager();
private:
friend struct DefaultSingletonTraits<TranslateManager>;
// Starts the translation process on |tab| containing the page in the
// |page_lang| language.
void InitiateTranslation(TabContents* tab, const std::string& page_lang);
// If the tab identified by |process_id| and |render_id| has been closed, this
// does nothing, otherwise it calls InitiateTranslation.
void InitiateTranslationPosted(int process_id,
int render_id,
const std::string& page_lang);
// Returns true if the passed language has been configured by the user as an
// accept language.
bool IsAcceptLanguage(TabContents* tab, const std::string& language);
// Initializes the |accept_languages_| language table based on the associated
// preference in |prefs|.
void InitAcceptLanguages(PrefService* prefs);
// Convenience method that adds a translate infobar to |tab|.
static void AddTranslateInfoBar(
TabContents* tab,
TranslateInfoBarDelegate::TranslateState state,
const GURL& url,
const std::string& original_language,
const std::string& target_language,
TranslateErrors::Type error_type);
// Returns the language to translate to, which is the language the UI is
// configured in. Returns an empty string if that language is not supported
// by the translation service.
static std::string GetTargetLanguage();
NotificationRegistrar notification_registrar_;
// A map that associates a profile with its parsed "accept languages".
typedef std::set<std::string> LanguageSet;
typedef std::map<PrefService*, LanguageSet> PrefServiceLanguagesMap;
PrefServiceLanguagesMap accept_languages_;
ScopedRunnableMethodFactory<TranslateManager> method_factory_;
static bool test_enabled_;
DISALLOW_COPY_AND_ASSIGN(TranslateManager);
};
#endif // CHROME_BROWSER_TRANSLATE_TRANSLATE_MANAGER_H_
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