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      1 // Copyright 2013 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_ANDROID_OMNIBOX_OMNIBOX_PRERENDER_H_
      6 #define CHROME_BROWSER_ANDROID_OMNIBOX_OMNIBOX_PRERENDER_H_
      7 
      8 #include "base/android/jni_helper.h"
      9 #include "base/memory/scoped_ptr.h"
     10 #include "base/strings/string16.h"
     11 
     12 class AutocompleteResult;
     13 class ProfielAndroid;
     14 class Profile;
     15 class TabAndroid;
     16 struct AutocompleteMatch;
     17 
     18 namespace content {
     19 class WebContents;
     20 }
     21 
     22 // This class is responsible for taking the user's omnibox input text,
     23 // AutocompleteResults and navigation actions and then feeding them to the
     24 // AutocompleteActionPredictor. The predictor uses it to update its
     25 // database and returns predictions on what page, if any, to pre-render
     26 // or pre-connect. This class then takes the corresponding action.
     27 class OmniboxPrerender {
     28  public:
     29   OmniboxPrerender(JNIEnv* env, jobject obj);
     30   virtual ~OmniboxPrerender();
     31 
     32   // Clears the transitional matches. This should be called when the user
     33   // stops typing into the omnibox (e.g. when navigating away, closing the
     34   // keyboard or changing tabs).
     35   void Clear(JNIEnv* env, jobject obj, jobject j_profile_android);
     36 
     37   // Initializes the underlying action predictor for a given profile instance.
     38   // This should be called as soon as possible as the predictor must register
     39   // for certain notifications to properly initialize before providing
     40   // predictions and updated its learning database.
     41   void InitializeForProfile(JNIEnv* env,
     42                             jobject obj,
     43                             jobject j_profile_android);
     44 
     45   // Potentailly invokes a pre-render or pre-connect given the url typed into
     46   // the omnibox and a corresponding autocomplete result. This should be
     47   // invoked everytime the omnibox changes (e.g. As the user types characters
     48   // this method should be invoked at least once per character).
     49   void PrerenderMaybe(JNIEnv* env,
     50                       jobject obj,
     51                       jstring j_url,
     52                       jstring j_current_url,
     53                       jint jsource_match,
     54                       jobject j_profile_android,
     55                       jobject j_tab);
     56 
     57  private:
     58 
     59   // Prerenders a given AutocompleteMatch's url.
     60   void DoPrerender(const AutocompleteMatch& match,
     61                    Profile* profile,
     62                    content::WebContents* web_contents);
     63   JavaObjectWeakGlobalRef weak_java_omnibox_;
     64 
     65   DISALLOW_COPY_AND_ASSIGN(OmniboxPrerender);
     66 };
     67 
     68 bool RegisterOmniboxPrerender(JNIEnv* env);
     69 
     70 #endif  // CHROME_BROWSER_ANDROID_OMNIBOX_OMNIBOX_PRERENDER_H_
     71