| // Copyright (c) 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_PRERENDER_PRERENDER_TAB_HELPER_H_ |
| #define CHROME_BROWSER_PRERENDER_PRERENDER_TAB_HELPER_H_ |
| |
| #include <memory> |
| |
| #include "base/macros.h" |
| #include "base/memory/weak_ptr.h" |
| #include "base/time/time.h" |
| #include "chrome/browser/prerender/prerender_histograms.h" |
| #include "chrome/browser/prerender/prerender_origin.h" |
| #include "content/public/browser/web_contents_observer.h" |
| #include "content/public/browser/web_contents_user_data.h" |
| #include "url/gurl.h" |
| |
| namespace prerender { |
| |
| class PrerenderManager; |
| |
| // Notifies the PrerenderManager with the events happening in the prerendered |
| // WebContents. |
| class PrerenderTabHelper |
| : public content::WebContentsObserver, |
| public content::WebContentsUserData<PrerenderTabHelper> { |
| public: |
| ~PrerenderTabHelper() override; |
| |
| // content::WebContentsObserver implementation. |
| void DidStartNavigation( |
| content::NavigationHandle* navigation_handle) override; |
| void DidRedirectNavigation( |
| content::NavigationHandle* navigation_handle) override; |
| void DidFinishNavigation( |
| content::NavigationHandle* navigation_handle) override; |
| |
| // Called when the URL of the main frame changed, either when the load |
| // commits, or a redirect happens. |
| void MainFrameUrlDidChange(const GURL& url); |
| |
| // Called when this prerendered WebContents has just been swapped in. |
| void PrerenderSwappedIn(); |
| |
| base::TimeTicks swap_ticks() const { return swap_ticks_; } |
| |
| Origin origin() const { return origin_; } |
| |
| private: |
| explicit PrerenderTabHelper(content::WebContents* web_contents); |
| friend class content::WebContentsUserData<PrerenderTabHelper>; |
| |
| // Retrieves the PrerenderManager, or NULL, if none was found. |
| PrerenderManager* MaybeGetPrerenderManager() const; |
| |
| // Returns the current TimeTicks synchronized with PrerenderManager ticks. In |
| // tests the clock can be mocked out in PrerenderManager, but in production |
| // this should be always TimeTicks::Now(). |
| base::TimeTicks GetTimeTicksFromPrerenderManager() const; |
| |
| // Returns whether the WebContents being observed is currently prerendering. |
| bool IsPrerendering(); |
| |
| // The origin of the relevant prerender or ORIGIN_NONE if there is no |
| // prerender associated with the WebContents. |
| Origin origin_; |
| |
| // Record the most recent swap time. |
| base::TimeTicks swap_ticks_; |
| |
| // Current URL being loaded. |
| GURL url_; |
| |
| base::WeakPtrFactory<PrerenderTabHelper> weak_factory_; |
| |
| DISALLOW_COPY_AND_ASSIGN(PrerenderTabHelper); |
| }; |
| |
| } // namespace prerender |
| |
| #endif // CHROME_BROWSER_PRERENDER_PRERENDER_TAB_HELPER_H_ |