| // Copyright 2013 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_UI_SEARCH_INSTANT_SEARCH_PRERENDERER_H_ |
| #define CHROME_BROWSER_UI_SEARCH_INSTANT_SEARCH_PRERENDERER_H_ |
| |
| #include "base/basictypes.h" |
| #include "base/memory/scoped_ptr.h" |
| #include "base/strings/string16.h" |
| #include "chrome/common/instant_types.h" |
| #include "content/public/browser/navigation_controller.h" |
| |
| class GURL; |
| class Profile; |
| struct AutocompleteMatch; |
| |
| namespace chrome { |
| struct NavigateParams; |
| } |
| |
| namespace content { |
| class WebContents; |
| } |
| |
| namespace gfx { |
| class Size; |
| } |
| |
| namespace prerender { |
| class PrerenderHandle; |
| } |
| |
| // InstantSearchPrerenderer is responsible for prerendering the default search |
| // provider Instant search base page URL to prefetch high-confidence search |
| // suggestions. InstantSearchPrerenderer manages the prerender handle associated |
| // with the prerendered contents. |
| class InstantSearchPrerenderer { |
| public: |
| InstantSearchPrerenderer(Profile* profile, const GURL& url); |
| ~InstantSearchPrerenderer(); |
| |
| // Returns the InstantSearchPrerenderer instance for the given |profile|. |
| static InstantSearchPrerenderer* GetForProfile(Profile* profile); |
| |
| // Prerender the |prerender_url_| contents. The |
| // |session_storage_namespace_map| is used to identify the namespace of the |
| // active tab at the time the prerender is generated. The |size| gives the |
| // initial size for the target prerender. InstantSearchPrerenderer will run at |
| // most one prerender at a time, so launching a prerender will cancel the |
| // previous prerenders (if any). |
| void Init( |
| const content::SessionStorageNamespaceMap& session_storage_namespace_map, |
| const gfx::Size& size); |
| |
| // Cancels the current request. |
| void Cancel(); |
| |
| // Tells the Instant search base page to prerender |suggestion|. |
| void Prerender(const InstantSuggestion& suggestion); |
| |
| // Tells the Instant search base page to render the prefetched search results. |
| void Commit(const string16& query); |
| |
| // Returns true if the prerendered page can be used to process the search for |
| // the given |source|. |
| bool CanCommitQuery(content::WebContents* source, |
| const string16& query) const; |
| |
| // Returns true and updates |params->target_contents| if a prerendered page |
| // exists for |url| and is swapped in. |
| bool UsePrerenderedPage(const GURL& url, chrome::NavigateParams* params); |
| |
| // Returns the last prefetched search query. |
| const string16& get_last_query() const { |
| return last_instant_suggestion_.text; |
| } |
| |
| // Returns true when prerendering is allowed for the given |source| and |
| // |match|. |
| bool IsAllowed(const AutocompleteMatch& match, |
| content::WebContents* source) const; |
| |
| private: |
| friend class InstantSearchPrerendererTest; |
| |
| content::WebContents* prerender_contents() const; |
| |
| Profile* const profile_; |
| |
| // Instant search base page URL. |
| const GURL prerender_url_; |
| |
| scoped_ptr<prerender::PrerenderHandle> prerender_handle_; |
| |
| InstantSuggestion last_instant_suggestion_; |
| |
| DISALLOW_COPY_AND_ASSIGN(InstantSearchPrerenderer); |
| }; |
| |
| #endif // CHROME_BROWSER_UI_SEARCH_INSTANT_SEARCH_PRERENDERER_H_ |