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// 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_AUTOCOMPLETE_AUTOCOMPLETE_CLASSIFIER_H_
#define CHROME_BROWSER_AUTOCOMPLETE_AUTOCOMPLETE_CLASSIFIER_H_
#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "base/memory/scoped_ptr.h"
#include "base/string16.h"
#include "components/browser_context_keyed_service/browser_context_keyed_service.h"
class AutocompleteController;
struct AutocompleteMatch;
class GURL;
class Profile;
class AutocompleteClassifier : public BrowserContextKeyedService {
public:
// Bitmap of AutocompleteProvider::Type values describing the default set of
// providers queried for the omnibox. Intended to be passed to
// AutocompleteController().
static const int kDefaultOmniboxProviders;
// Bitmap of AutocompleteProvider::Type values describing the set of providers
// that have been whitelisted as working properly with the Instant Extended
// API. Intended to be passed to AutocompleteController().
static const int kInstantExtendedOmniboxProviders;
explicit AutocompleteClassifier(Profile* profile);
virtual ~AutocompleteClassifier();
// 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(). |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 string16& text,
bool prefer_keyword,
bool allow_exact_keyword_match,
AutocompleteMatch* match,
GURL* alternate_nav_url);
private:
// BrowserContextKeyedService:
virtual void Shutdown() OVERRIDE;
scoped_ptr<AutocompleteController> controller_;
// Are we currently in Classify? Used to verify Classify isn't invoked
// recursively, since this can corrupt state and cause crashes.
bool inside_classify_;
DISALLOW_IMPLICIT_CONSTRUCTORS(AutocompleteClassifier);
};
#endif // CHROME_BROWSER_AUTOCOMPLETE_AUTOCOMPLETE_CLASSIFIER_H_
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