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// Copyright 2025 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_PRELOADING_SEARCH_PRELOAD_SEARCH_PRELOAD_PIPELINE_MANAGER_H_
#define CHROME_BROWSER_PRELOADING_SEARCH_PRELOAD_SEARCH_PRELOAD_PIPELINE_MANAGER_H_
#include "base/containers/flat_map.h"
#include "base/memory/weak_ptr.h"
#include "chrome/browser/preloading/search_preload/search_preload_pipeline.h"
#include "content/public/browser/web_contents_observer.h"
#include "content/public/browser/web_contents_user_data.h"
#include "url/gurl.h"
class AutocompleteResult;
class Profile;
class SearchPreloadService;
class TemplateURLService;
struct AutocompleteMatch;
namespace content {
class WebContents;
}
namespace omnibox::mojom {
enum class NavigationPredictor;
}
// Roles:
//
// - Manages preload pipelines per WebContents.
// - Starts preloads in response to Omnibox events.
class SearchPreloadPipelineManager
: public content::WebContentsUserData<SearchPreloadPipelineManager>,
public content::WebContentsObserver {
public:
~SearchPreloadPipelineManager() override;
// Not movable nor copyable.
SearchPreloadPipelineManager(const SearchPreloadPipelineManager&&) = delete;
SearchPreloadPipelineManager& operator=(
const SearchPreloadPipelineManager&&) = delete;
SearchPreloadPipelineManager(const SearchPreloadPipelineManager&) = delete;
SearchPreloadPipelineManager& operator=(const SearchPreloadPipelineManager&) =
delete;
base::WeakPtr<SearchPreloadPipelineManager> GetWeakPtr() {
return weak_factory_.GetWeakPtr();
}
// Implements `content::WebContentsObserver`
void DidFinishNavigation(
content::NavigationHandle* navigation_handle) override;
// Clears all preloads.
void ClearPreloads();
// Called when autocomplete is updated.
void OnAutocompleteResultChanged(
Profile& profile,
base::WeakPtr<SearchPreloadService> search_preload_service,
const AutocompleteResult& result,
const std::optional<net::HttpNoVarySearchData>& no_vary_search_hint);
// Called when a user is likely to navigate to the match.
//
// Returns true iff a new prefetch is triggered by this call. Note that it
// returns false if a prefetch for the same canonical URL has already
// triggered.
bool OnNavigationLikely(
Profile& profile,
base::WeakPtr<SearchPreloadService> search_preload_service,
const AutocompleteMatch& match,
omnibox::mojom::NavigationPredictor navigation_predictor,
const std::optional<net::HttpNoVarySearchData>& no_vary_search_hint);
// Invalidates a pipeline with `canonical_url`.
//
// Returns true iff invalidated successfully.
bool InvalidatePipelineForTesting(GURL canonical_url);
private:
friend content::WebContentsUserData<SearchPreloadPipelineManager>;
WEB_CONTENTS_USER_DATA_KEY_DECL();
explicit SearchPreloadPipelineManager(content::WebContents* contents);
void EraseNotAlivePipelines();
// Returns `(singal_result_prefetch, signal_result_prerender)`.
std::tuple<std::optional<SearchPreloadSignalResult>,
std::optional<SearchPreloadSignalResult>>
OnAutocompleteResultChangedProcessOne(
Profile& profile,
base::WeakPtr<SearchPreloadService> search_preload_service,
TemplateURLService& template_url_service,
const AutocompleteMatch& match,
const std::optional<net::HttpNoVarySearchData>& no_vary_search_hint);
// Manages pipeline per canonical URL.
base::flat_map<GURL, std::unique_ptr<SearchPreloadPipeline>> pipelines_;
base::WeakPtrFactory<SearchPreloadPipelineManager> weak_factory_{this};
};
#endif // CHROME_BROWSER_PRELOADING_SEARCH_PRELOAD_SEARCH_PRELOAD_PIPELINE_MANAGER_H_
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