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      1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CHROME_BROWSER_UI_SEARCH_ENGINES_SEARCH_ENGINE_TAB_HELPER_H_
      6 #define CHROME_BROWSER_UI_SEARCH_ENGINES_SEARCH_ENGINE_TAB_HELPER_H_
      7 
      8 #include "chrome/browser/ui/find_bar/find_bar_controller.h"
      9 #include "chrome/browser/ui/find_bar/find_notification_details.h"
     10 #include "chrome/common/search_provider.h"
     11 #include "content/public/browser/web_contents_observer.h"
     12 #include "content/public/browser/web_contents_user_data.h"
     13 
     14 class SearchEngineTabHelperDelegate;
     15 
     16 // Per-tab search engine manager. Handles dealing search engine processing
     17 // functionality.
     18 class SearchEngineTabHelper
     19     : public content::WebContentsObserver,
     20       public content::WebContentsUserData<SearchEngineTabHelper> {
     21  public:
     22   virtual ~SearchEngineTabHelper();
     23 
     24   SearchEngineTabHelperDelegate* delegate() const { return delegate_; }
     25   void set_delegate(SearchEngineTabHelperDelegate* d) { delegate_ = d; }
     26 
     27   // content::WebContentsObserver overrides.
     28   virtual void DidNavigateMainFrame(
     29       const content::LoadCommittedDetails& details,
     30       const content::FrameNavigateParams& params) OVERRIDE;
     31   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
     32 
     33  private:
     34   explicit SearchEngineTabHelper(content::WebContents* web_contents);
     35   friend class content::WebContentsUserData<SearchEngineTabHelper>;
     36 
     37   // Handles when a page specifies an OSDD (OpenSearch Description Document).
     38   void OnPageHasOSDD(int32 page_id,
     39                      const GURL& doc_url,
     40                      const search_provider::OSDDType& msg_provider_type);
     41 
     42   // If params has a searchable form, this tries to create a new keyword.
     43   void GenerateKeywordIfNecessary(
     44       const content::FrameNavigateParams& params);
     45 
     46   // Delegate for notifying our owner about stuff. Not owned by us.
     47   SearchEngineTabHelperDelegate* delegate_;
     48 
     49   DISALLOW_COPY_AND_ASSIGN(SearchEngineTabHelper);
     50 };
     51 
     52 #endif  // CHROME_BROWSER_UI_SEARCH_ENGINES_SEARCH_ENGINE_TAB_HELPER_H_
     53