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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_OMNIBOX_BROWSER_AUTOCOMPLETE_CLASSIFIER_H_
#define COMPONENTS_OMNIBOX_BROWSER_AUTOCOMPLETE_CLASSIFIER_H_
#include <memory>
#include <string>
#include "components/keyed_service/core/keyed_service.h"
#include "components/omnibox/browser/autocomplete_scheme_classifier.h"
#include "third_party/metrics_proto/omnibox_event.pb.h"
class AutocompleteController;
struct AutocompleteMatch;
class GURL;
class AutocompleteClassifier : public KeyedService {
public:
AutocompleteClassifier() = delete;
AutocompleteClassifier(
std::unique_ptr<AutocompleteController> controller_,
std::unique_ptr<AutocompleteSchemeClassifier> scheme_classifier);
AutocompleteClassifier(const AutocompleteClassifier&) = delete;
AutocompleteClassifier& operator=(const AutocompleteClassifier&) = delete;
~AutocompleteClassifier() override;
// KeyedService:
void Shutdown() override;
// Bitmap of AutocompleteProvider::Type values describing the default set of
// providers queried for the omnibox. Intended to be passed to
// AutocompleteController().
// The parameter |is_low_memory_device| permits suppression of certain
// Autocomplete providers on devices where memory is scarce. This is
// particularly relevant for Android, where visually rich suggestions should
// be suppressed to reduce memory pressure.
static int DefaultOmniboxProviders(bool is_low_memory_device = false);
// Given some string |text| that the user wants to use for navigation,
// determines how it should be interpreted.
// |prefer_keyword| should be true the when keyword UI is onscreen; see
// comments on AutocompleteController::Start().
// |allow_exact_keyword_match| should be true when treating the string as a
// potential keyword search is valid; see
// AutocompleteInput::allow_exact_keyword_match().
// |page_classification| gives information about the context (e.g., is the
// user on a search results page doing search term replacement); this may
// be useful in deciding how the input should be interpreted.
// |match| should be a non-NULL outparam that will be set to the default
// match for this input, if any (for invalid input, there will be no default
// match, and |match| will be left unchanged). |alternate_nav_url| is a
// possibly-NULL outparam that, if non-NULL, will be set to the navigational
// URL (if any) in case of an accidental search; see comments on
// AutocompleteResult::alternate_nav_url_ in autocomplete.h.
void Classify(
const std::u16string& text,
bool prefer_keyword,
bool allow_exact_keyword_match,
metrics::OmniboxEventProto::PageClassification page_classification,
AutocompleteMatch* match,
GURL* alternate_nav_url);
private:
std::unique_ptr<AutocompleteController> controller_;
std::unique_ptr<AutocompleteSchemeClassifier> scheme_classifier_;
// Are we currently in Classify? Used to verify Classify isn't invoked
// recursively, since this can corrupt state and cause crashes.
bool inside_classify_;
};
#endif // COMPONENTS_OMNIBOX_BROWSER_AUTOCOMPLETE_CLASSIFIER_H_
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