1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
|
// 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_CONTENTS_PROVIDER_H_
#define CHROME_BROWSER_AUTOCOMPLETE_HISTORY_CONTENTS_PROVIDER_H_
#pragma once
#include "chrome/browser/autocomplete/autocomplete.h"
#include "chrome/browser/history/history.h"
namespace bookmark_utils {
struct TitleMatch;
}
// HistoryContentsProvider is an AutocompleteProvider that provides results from
// the contents (body and/or title) of previously visited pages.
// HistoryContentsProvider gets results from two sources:
// . HistoryService: this provides results for matches in the body/title of
// previously viewed pages. This is asynchronous.
// . BookmarkModel: provides results for matches in the titles of bookmarks.
// This is synchronous.
class HistoryContentsProvider : public AutocompleteProvider {
public:
HistoryContentsProvider(ACProviderListener* listener, Profile* profile)
: AutocompleteProvider(listener, profile, "HistoryContents"),
star_title_count_(0),
star_contents_count_(0),
title_count_(0),
contents_count_(0),
input_type_(AutocompleteInput::INVALID),
trim_http_(false),
have_results_(false) {
}
// As necessary asks the history service for the relevant results. When
// done SetResults is invoked.
virtual void Start(const AutocompleteInput& input,
bool minimal_changes);
virtual void Stop();
// Returns the total number of matches available in the database, up to
// kMaxMatchCount, whichever is smaller.
// Return value is incomplete if done() returns false.
size_t db_match_count() const { return results_.size(); }
// The maximum match count we'll report. If the db_match_count is greater
// than this, it will be clamped to this result.
static const size_t kMaxMatchCount = 50;
private:
~HistoryContentsProvider() {}
void QueryComplete(HistoryService::Handle handle,
history::QueryResults* results);
// Converts each MatchingPageResult in results_ to an AutocompleteMatch and
// adds it to matches_.
void ConvertResults();
// Creates and returns an AutocompleteMatch from a MatchingPageResult.
AutocompleteMatch ResultToMatch(const history::URLResult& result,
int score);
// Adds ACMatchClassifications to match from the offset positions in
// page_result.
void ClassifyDescription(const history::URLResult& result,
AutocompleteMatch* match) const;
// Calculates and returns the relevance of a particular result. See the
// chart in autocomplete.h for the list of values this returns.
int CalculateRelevance(const history::URLResult& result);
// Queries the bookmarks for any bookmarks whose title matches input. All
// matches are added directly to results_.
void QueryBookmarks(const AutocompleteInput& input);
// Converts a BookmarkModel::TitleMatch to a QueryResult and adds it to
// results_.
void AddBookmarkTitleMatchToResults(const bookmark_utils::TitleMatch& match);
CancelableRequestConsumerT<int, 0> request_consumer_;
// The number of times we're returned each different type of result. These are
// used by CalculateRelevance. Initialized in Start.
int star_title_count_;
int star_contents_count_;
int title_count_;
int contents_count_;
// Current autocomplete input type.
AutocompleteInput::Type input_type_;
// Whether we should trim "http://" from results.
bool trim_http_;
// Results from most recent query. These are cached so we don't have to
// re-issue queries for "minor changes" (which don't affect this provider).
history::QueryResults results_;
// Whether results_ is valid (so we can tell invalid apart from empty).
bool have_results_;
// Current query string.
std::wstring query_;
DISALLOW_COPY_AND_ASSIGN(HistoryContentsProvider);
};
#endif // CHROME_BROWSER_AUTOCOMPLETE_HISTORY_CONTENTS_PROVIDER_H_
|
