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// Copyright 2011 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_TAB_HELPER_H_
#define CHROME_BROWSER_TRANSLATE_TRANSLATE_TAB_HELPER_H_
#include <string>
#include "base/memory/scoped_ptr.h"
#include "chrome/browser/ui/translate/translate_bubble_model.h"
#include "components/translate/content/browser/content_translate_driver.h"
#include "components/translate/core/common/translate_errors.h"
#include "content/public/browser/web_contents_observer.h"
#include "content/public/browser/web_contents_user_data.h"
namespace content {
class BrowserContext;
class WebContents;
}
struct LanguageDetectionDetails;
class PrefService;
class TranslateAcceptLanguages;
class TranslatePrefs;
class TranslateManager;
class TranslateTabHelper
: public content::WebContentsObserver,
public content::WebContentsUserData<TranslateTabHelper> {
public:
virtual ~TranslateTabHelper();
// Gets the LanguageState associated with the page.
LanguageState& GetLanguageState();
// Returns the ContentTranslateDriver instance associated with this
// WebContents.
ContentTranslateDriver& translate_driver() { return translate_driver_; }
// Helper method to return a new TranslatePrefs instance.
static scoped_ptr<TranslatePrefs> CreateTranslatePrefs(PrefService* prefs);
// Helper method to return the TranslateAcceptLanguages instance associated
// with |browser_context|.
static TranslateAcceptLanguages* GetTranslateAcceptLanguages(
content::BrowserContext* browser_context);
// Helper method to return the TranslateManager instance associated with
// |web_contents|, or NULL if there is no such associated instance.
static TranslateManager* GetManagerFromWebContents(
content::WebContents* web_contents);
// Gets the associated TranslateManager.
TranslateManager* GetTranslateManager();
// Gets the associated WebContents. Returns NULL if the WebContents is being
// destroyed.
content::WebContents* GetWebContents();
// Denotes which state the user is in with respect to translate.
enum TranslateStep {
BEFORE_TRANSLATE,
TRANSLATING,
AFTER_TRANSLATE,
TRANSLATE_ERROR
};
// Called when the embedder should present UI to the user corresponding to the
// user's current |step|.
void ShowTranslateUI(TranslateStep step,
const std::string source_language,
const std::string target_language,
TranslateErrors::Type error_type,
bool triggered_from_menu);
private:
explicit TranslateTabHelper(content::WebContents* web_contents);
friend class content::WebContentsUserData<TranslateTabHelper>;
// content::WebContentsObserver implementation.
virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
virtual void DidNavigateAnyFrame(
const content::LoadCommittedDetails& details,
const content::FrameNavigateParams& params) OVERRIDE;
virtual void WebContentsDestroyed(
content::WebContents* web_contents) OVERRIDE;
void OnLanguageDetermined(const LanguageDetectionDetails& details,
bool page_needs_translation);
void OnPageTranslated(int32 page_id,
const std::string& original_lang,
const std::string& translated_lang,
TranslateErrors::Type error_type);
// Shows the translate bubble.
void ShowBubble(TranslateStep step, TranslateErrors::Type error_type);
ContentTranslateDriver translate_driver_;
scoped_ptr<TranslateManager> translate_manager_;
DISALLOW_COPY_AND_ASSIGN(TranslateTabHelper);
};
#endif // CHROME_BROWSER_TRANSLATE_TRANSLATE_TAB_HELPER_H_
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