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// Copyright (c) 2010 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_HISTORY_QUICK_PROVIDER_H_
#define CHROME_BROWSER_AUTOCOMPLETE_HISTORY_QUICK_PROVIDER_H_
#pragma once
#include <string>
#include "chrome/browser/autocomplete/history_provider.h"
#include "chrome/browser/history/history_types.h"
#include "chrome/browser/history/in_memory_url_index.h"
class Profile;
namespace history {
class HistoryBackend;
} // namespace history
// This class is an autocomplete provider (a pseudo-internal component of
// the history system) which quickly (and synchronously) provides matching
// results from recently or frequently visited sites in the profile's
// history.
//
// TODO(mrossetti): Review to see if the following applies since we're not
// using the database during the autocomplete pass.
class HistoryQuickProvider : public HistoryProvider {
public:
HistoryQuickProvider(ACProviderListener* listener, Profile* profile);
~HistoryQuickProvider();
// AutocompleteProvider. |minimal_changes| is ignored since there
// is no asynch completion performed.
virtual void Start(const AutocompleteInput& input,
bool minimal_changes) OVERRIDE;
virtual void DeleteMatch(const AutocompleteMatch& match) OVERRIDE;
// Performs the autocomplete matching and scoring.
void DoAutocomplete();
private:
friend class HistoryQuickProviderTest;
AutocompleteMatch QuickMatchToACMatch(
const history::ScoredHistoryMatch& history_match,
MatchType match_type,
size_t match_number);
// Breaks a string down into individual words and return as a vector with
// the individual words in their original order.
static history::InMemoryURLIndex::String16Vector WordVectorFromString16(
const string16& uni_string);
// Determines the relevance for some input, given its type and which match it
// is. If |match_type| is NORMAL, |match_number| is a number
// [0, kMaxSuggestions) indicating the relevance of the match (higher == more
// relevant). For other values of |match_type|, |match_number| is ignored.
static int CalculateRelevance(int raw_score,
AutocompleteInput::Type input_type,
MatchType match_type,
size_t match_number);
// Returns the index that should be used for history lookups.
history::InMemoryURLIndex* GetIndex();
// Only for use in unittests. Takes ownership of |index|.
void SetIndexForTesting(history::InMemoryURLIndex* index);
AutocompleteInput autocomplete_input_;
bool trim_http_;
std::string languages_;
// Only used for testing.
scoped_ptr<history::InMemoryURLIndex> index_for_testing_;
};
#endif // CHROME_BROWSER_AUTOCOMPLETE_HISTORY_QUICK_PROVIDER_H_
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