Move LanguageState to the translate component

components/translate/core/browser/language_state.h

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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_TAB_CONTENTS_LANGUAGE_STATE_H_
-#define CHROME_BROWSER_TAB_CONTENTS_LANGUAGE_STATE_H_
+#ifndef COMPONENTS_TRANSLATE_CORE_BROWSER_LANGUAGE_STATE_H_
+#define COMPONENTS_TRANSLATE_CORE_BROWSER_LANGUAGE_STATE_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 
-class LanguageStateObserver;
-
-namespace content {
-struct LoadCommittedDetails;
-class NavigationController;
-class WebContents;
-}
+class TranslateDriver;
 
 // This class holds the language state of the current page.
-// There is one LanguageState instance per WebContents.
+// There is one LanguageState instance per tab.
 // It is used to determine when navigating to a new page whether it should
 // automatically be translated.
 // This auto-translate behavior is the expected behavior when:
 // - user is on page in language A that they had translated to language B.
 // - user clicks a link in that page that takes them to a page also in language
 //   A.
-
 class LanguageState {
  public:
-  explicit LanguageState(content::NavigationController* nav_controller);
+  explicit LanguageState(TranslateDriver* driver);
   ~LanguageState();
 
   // Should be called when the page did a new navigation (whether it is a main
   // frame or sub-frame navigation).
-  void DidNavigate(const content::LoadCommittedDetails& details);
+  void DidNavigate(bool in_page_navigation, bool is_main_frame, bool reload);
 
   // Should be called when the language of the page has been determined.
   // |page_needs_translation| when false indicates that the browser should not
   // offer to translate the page.
   void LanguageDetermined(const std::string& page_language,
                           bool page_needs_translation);
 
   // Returns the language the current page should be translated to, based on the
   // previous page languages and the transition.  This should be called after
   // the language page has been determined.
@@ skipping 18 matching lines @@
   void set_translation_pending(bool value) { translation_pending_ = value; }
 
   // Whether the user has already declined to translate the page.
   bool translation_declined() const { return translation_declined_; }
   void set_translation_declined(bool value) { translation_declined_ = value; }
 
   // Whether the current page was navigated through an in-page (fragment)
   // navigation.
   bool in_page_navigation() const { return in_page_navigation_; }
 
-  // Whether the translate is enabled. This value is supposed to be used for the
-  // Translate icon on the Omnibox.
+  // Whether the translate is enabled.
   bool translate_enabled() const { return translate_enabled_; }
   void SetTranslateEnabled(bool value);
 
   // Whether the current page's language is different from the previous
   // language.
   bool HasLanguageChanged() const;
 
-  void set_observer(LanguageStateObserver* observer) { observer_ = observer; }
-
  private:
   void SetIsPageTranslated(bool value);
 
   // Whether the page is translated or not.
   bool is_page_translated_;
 
   // The languages this page is in. Note that current_lang_ is different from
   // original_lang_ when the page has been translated.
   // Note that these might be empty if the page language has not been determined
   // yet.
   std::string original_lang_;
   std::string current_lang_;
 
   // Same as above but for the previous page.
   std::string prev_original_lang_;
   std::string prev_current_lang_;
 
-  // The navigation controller of the tab we are associated with.
-  content::NavigationController* navigation_controller_;
+  // Provides driver-level context to the shared code of the component. Must
+  // outlive this object.
+  TranslateDriver* translate_driver_;
 
   // Whether it is OK to offer to translate the page.  Some pages explictly
   // specify that they should not be translated by the browser (this is the case
   // for GMail for example, which provides its own translation features).
   bool page_needs_translation_;
 
-  // Whether a translation is currently pending (WebContents waiting for the
-  // PAGE_TRANSLATED notification).  This is needed to avoid sending duplicate
-  // translate requests to a page.  TranslateManager initiates translations
-  // when it received the LANGUAGE_DETERMINED notification.  This is sent by
-  // the renderer with the page contents, every time the load stops for the
-  // main frame, so we may get several.
-  // TODO(jcampan): make the renderer send the language just once per navigation
+  // Whether a translation is currently pending.
+  // This is needed to avoid sending duplicate translate requests to a page.
+  // Translations may be initiated every time the load stops for the main frame,
+  // which may happen several times.
+  // TODO(jcampan): make the client send the language just once per navigation
   //                then we can get rid of that state.
   bool translation_pending_;
 
   // Whether the user has declined to translate the page (by closing the infobar
   // for example).  This is necessary as a new infobar could be shown if a new
   // load happens in the page after the user closed the infobar.
   bool translation_declined_;
 
   // Whether the current navigation is a fragment navigation (in page).
   bool in_page_navigation_;
 
   // Whether the Translate is enabled.
   bool translate_enabled_;
 
-  LanguageStateObserver* observer_;
-
   DISALLOW_COPY_AND_ASSIGN(LanguageState);
 };
 
-#endif  // CHROME_BROWSER_TAB_CONTENTS_LANGUAGE_STATE_H_
+#endif  // COMPONENTS_TRANSLATE_CORE_BROWSER_LANGUAGE_STATE_H_