Instant Extended: Fallback to local preview if the remote instant page is not ready on user input.

chrome/browser/instant/instant_loader.h

 // Copyright 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_INSTANT_INSTANT_LOADER_H_
 #define CHROME_BROWSER_INSTANT_INSTANT_LOADER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 64 matching lines @@
   bool is_pointer_down_from_activate() const {
     return is_pointer_down_from_activate_;
   }
 
   // Returns info about the last navigation by the Instant page. If the page
   // hasn't navigated since the last Update(), the URL is empty.
   const history::HistoryAddPageArgs& last_navigation() const {
     return last_navigation_;
   }
 
+  // Tells the loader that it is in fallback mode.
+  void set_is_in_fallback_mode();
+  bool is_in_fallback_mode() const { return is_in_fallback_mode_; }
+
   // Called by the history tab helper with information that it would have added
   // to the history service had this WebContents not been used for Instant.
   void DidNavigate(const history::HistoryAddPageArgs& add_page_args);
 
   // Returns true if the loader is using
   // InstantController::kLocalOmniboxPopupURL as the |instant_url_|.
   bool IsUsingLocalPreview() const;
 
   // Calls through to methods of the same name on InstantClient.
   void Update(const string16& text,
               size_t selection_start,
               size_t selection_end,
               bool verbatim);
   void Submit(const string16& text);
   void Cancel(const string16& text);
   void SetPopupBounds(const gfx::Rect& bounds);
   void SetMarginSize(int start, int end);
+  void InitializeFonts();
   void SendAutocompleteResults(
       const std::vector<InstantAutocompleteResult>& results);
   void UpOrDownKeyPressed(int count);
   void SearchModeChanged(const chrome::search::Mode& mode);
   void SendThemeBackgroundInfo(const ThemeBackgroundInfo& theme_info);
   void SendThemeAreaHeight(int height);
   void SetDisplayInstantResults(bool display_instant_results);
   void KeyCaptureChanged(bool is_key_capture_enabled);
 
  private:
   class WebContentsDelegateImpl;
 
   // Overridden from InstantClient::Delegate:
   virtual void SetSuggestions(
       const std::vector<InstantSuggestion>& suggestions) OVERRIDE;
   virtual void InstantSupportDetermined(bool supports_instant) OVERRIDE;
   virtual void ShowInstantPreview(InstantShownReason reason,
                                   int height,
                                   InstantSizeUnits units) OVERRIDE;
   virtual void StartCapturingKeyStrokes() OVERRIDE;
   virtual void StopCapturingKeyStrokes() OVERRIDE;
   virtual void RenderViewGone() OVERRIDE;
   virtual void AboutToNavigateMainFrame(const GURL& url) OVERRIDE;
   virtual void NavigateToURL(const GURL& url,
                              content::PageTransition transition) OVERRIDE;
+  virtual void RenderViewCreated(content::RenderViewHost* host) OVERRIDE;
 
   // Overridden from content::NotificationObserver:
   virtual void Observe(int type,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
   void SetupPreviewContents();
   void CleanupPreviewContents();
   void ReplacePreviewContents(content::WebContents* old_contents,
                               content::WebContents* new_contents);
 
   InstantClient client_;
   InstantController* const controller_;
 
   // Delegate of the preview WebContents. Used when the user does some gesture
   // on the preview and it needs to be activated.
   scoped_ptr<WebContentsDelegateImpl> delegate_;
   scoped_ptr<content::WebContents> contents_;
 
   const std::string instant_url_;
   bool supports_instant_;
   bool is_pointer_down_from_activate_;
   history::HistoryAddPageArgs last_navigation_;
 
+  // Indicates if this loader is running as a fallback loader using the local
+  // preview because the actual instant page was too slow to load.
+  bool is_in_fallback_mode_;
+
   // Used to get notifications about renderers coming and going.
   content::NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(InstantLoader);
 };
 
 #endif  // CHROME_BROWSER_INSTANT_INSTANT_LOADER_H_