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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 "base/memory/weak_ptr.h"
      9 #include "chrome/browser/ui/find_bar/find_bar_controller.h"
     10 #include "chrome/browser/ui/find_bar/find_notification_details.h"
     11 #include "chrome/common/search_provider.h"
     12 #include "content/public/browser/web_contents_observer.h"
     13 #include "content/public/browser/web_contents_user_data.h"
     14 
     15 class SearchEngineTabHelperDelegate;
     16 class TemplateURL;
     17 
     18 // Per-tab search engine manager. Handles dealing search engine processing
     19 // functionality.
     20 class SearchEngineTabHelper
     21     : public content::WebContentsObserver,
     22       public content::WebContentsUserData<SearchEngineTabHelper> {
     23  public:
     24   virtual ~SearchEngineTabHelper();
     25 
     26   SearchEngineTabHelperDelegate* delegate() const { return delegate_; }
     27   void set_delegate(SearchEngineTabHelperDelegate* d) { delegate_ = d; }
     28 
     29   // content::WebContentsObserver overrides.
     30   virtual void DidNavigateMainFrame(
     31       const content::LoadCommittedDetails& details,
     32       const content::FrameNavigateParams& params) OVERRIDE;
     33   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
     34 
     35  private:
     36   explicit SearchEngineTabHelper(content::WebContents* web_contents);
     37   friend class content::WebContentsUserData<SearchEngineTabHelper>;
     38 
     39   // Handles when a page specifies an OSDD (OpenSearch Description Document).
     40   void OnPageHasOSDD(const GURL& page_url,
     41                      const GURL& osdd_url,
     42                      const search_provider::OSDDType& msg_provider_type);
     43 
     44   // Handles when an OSDD is downloaded.
     45   void OnDownloadedOSDD(scoped_ptr<TemplateURL> template_url);
     46 
     47   // If params has a searchable form, this tries to create a new keyword.
     48   void GenerateKeywordIfNecessary(
     49       const content::FrameNavigateParams& params);
     50 
     51   // Delegate for notifying our owner about stuff. Not owned by us.
     52   SearchEngineTabHelperDelegate* delegate_;
     53 
     54   base::WeakPtrFactory<SearchEngineTabHelper> weak_ptr_factory_;
     55 
     56   DISALLOW_COPY_AND_ASSIGN(SearchEngineTabHelper);
     57 };
     58 
     59 #endif  // CHROME_BROWSER_UI_SEARCH_ENGINES_SEARCH_ENGINE_TAB_HELPER_H_
     60