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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/android/omnibox/omnibox_prerender.h"
#include "base/android/jni_string.h"
#include "base/check.h"
#include "base/notreached.h"
#include "chrome/browser/android/tab_android.h"
#include "chrome/browser/predictors/autocomplete_action_predictor.h"
#include "chrome/browser/predictors/autocomplete_action_predictor_factory.h"
#include "chrome/browser/predictors/loading_predictor.h"
#include "chrome/browser/predictors/loading_predictor_factory.h"
#include "chrome/browser/preloading/prefetch/search_prefetch/search_prefetch_service.h"
#include "chrome/browser/preloading/prefetch/search_prefetch/search_prefetch_service_factory.h"
#include "chrome/browser/preloading/prerender/prerender_manager.h"
#include "chrome/browser/preloading/prerender/prerender_utils.h"
#include "chrome/browser/profiles/profile.h"
#include "components/omnibox/browser/autocomplete_match.h"
#include "components/omnibox/browser/autocomplete_result.h"
#include "components/omnibox/browser/base_search_provider.h"
#include "content/public/browser/web_contents.h"
#include "url/gurl.h"
// Must come after all headers that specialize FromJniType() / ToJniType().
#include "chrome/browser/ui/android/omnibox/jni_headers/OmniboxPrerender_jni.h"
using base::android::JavaParamRef;
using predictors::AutocompleteActionPredictor;
using predictors::AutocompleteActionPredictorFactory;
OmniboxPrerender::OmniboxPrerender(JNIEnv* env,
const jni_zero::JavaRef<jobject>& obj)
: weak_java_omnibox_(env, obj) {}
OmniboxPrerender::~OmniboxPrerender() = default;
static jlong JNI_OmniboxPrerender_Init(JNIEnv* env,
const JavaParamRef<jobject>& obj) {
OmniboxPrerender* omnibox = new OmniboxPrerender(env, obj);
return reinterpret_cast<intptr_t>(omnibox);
}
void OmniboxPrerender::Clear(JNIEnv* env,
const JavaParamRef<jobject>& obj,
Profile* profile) {
DCHECK(profile);
if (!profile)
return;
AutocompleteActionPredictor* action_predictor =
AutocompleteActionPredictorFactory::GetForProfile(profile);
action_predictor->UpdateDatabaseFromTransitionalMatches(GURL());
}
void OmniboxPrerender::InitializeForProfile(JNIEnv* env,
const JavaParamRef<jobject>& obj,
Profile* profile) {
// Initialize the AutocompleteActionPredictor for this profile.
// It needs to register for notifications as part of its initialization.
AutocompleteActionPredictorFactory::GetForProfile(profile);
}
void OmniboxPrerender::PrerenderMaybe(
JNIEnv* env,
const JavaParamRef<jobject>& obj,
const JavaParamRef<jstring>& j_url,
const JavaParamRef<jstring>& j_current_url,
jlong jsource_match,
Profile* profile,
const JavaParamRef<jobject>& j_tab) {
AutocompleteResult* autocomplete_result =
reinterpret_cast<AutocompleteResult*>(jsource_match);
std::u16string url_string =
base::android::ConvertJavaStringToUTF16(env, j_url);
std::u16string current_url_string =
base::android::ConvertJavaStringToUTF16(env, j_current_url);
content::WebContents* web_contents =
TabAndroid::GetNativeTab(env, j_tab)->web_contents();
// TODO(apiccion) Use a delegate for communicating with web_contents.
// This can happen in OmniboxTests since the results are generated
// in Java only.
if (!autocomplete_result)
return;
if (!profile)
return;
// TODO(crbug.com/40830195): Consider how to co-work with preconnect.
if (SearchPrefetchService* search_prefetch_service =
SearchPrefetchServiceFactory::GetForProfile(profile)) {
search_prefetch_service->OnResultChanged(web_contents,
*autocomplete_result);
}
auto* default_match = autocomplete_result->default_match();
if (!default_match)
return;
AutocompleteActionPredictor* action_predictor =
AutocompleteActionPredictorFactory::GetForProfile(profile);
if (!action_predictor)
return;
action_predictor->
RegisterTransitionalMatches(url_string, *autocomplete_result);
AutocompleteActionPredictor::Action recommended_action =
action_predictor->RecommendAction(url_string, *default_match,
web_contents);
GURL current_url = GURL(current_url_string);
// Ask for prerendering if the destination URL is different than the
// current URL.
if (default_match->destination_url == current_url)
return;
switch (recommended_action) {
case AutocompleteActionPredictor::ACTION_PRERENDER:
DoPrerender(*default_match, profile, web_contents);
break;
case AutocompleteActionPredictor::ACTION_PRECONNECT:
DoPreconnect(*default_match, profile);
break;
case AutocompleteActionPredictor::ACTION_NONE:
break;
default:
NOTREACHED();
}
}
void OmniboxPrerender::DoPrerender(const AutocompleteMatch& match,
Profile* profile,
content::WebContents* web_contents) {
DCHECK(profile);
if (!profile)
return;
DCHECK(web_contents);
if (!web_contents)
return;
// AutocompleteActionPredictor does not perform prerendering for search
// AutocompleteMatches. See `AutocompleteActionPredictor::RecommendAction` for
// more information.
// SearchPrefetchService is responsible for handling search
// AutocompleteMatches and preloading search result pages when needed.
DCHECK(!AutocompleteMatch::IsSearchType(match.type));
predictors::AutocompleteActionPredictorFactory::GetForProfile(profile)
->StartPrerendering(match.destination_url, *web_contents);
}
void OmniboxPrerender::DoPreconnect(const AutocompleteMatch& match,
Profile* profile) {
auto* loading_predictor =
predictors::LoadingPredictorFactory::GetForProfile(profile);
if (loading_predictor) {
loading_predictor->PrepareForPageLoad(
/*initiator_origin=*/std::nullopt, match.destination_url,
predictors::HintOrigin::OMNIBOX,
predictors::AutocompleteActionPredictor::IsPreconnectable(match));
}
}
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