Merge Chromium src@r53293

Change-Id: Ia79acf8670f385cee48c45b0a75371d8e950af34

1 files changed, 110 insertions, 0 deletions

diff --git a/chrome/browser/autocomplete/history_contents_provider.h b/chrome/browser/autocomplete/history_contents_provider.h
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+++ b/chrome/browser/autocomplete/history_contents_provider.h
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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_CONTENTS_PROVIDER_H_
+#define CHROME_BROWSER_AUTOCOMPLETE_HISTORY_CONTENTS_PROVIDER_H_
+
+#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_