Add TitledUrlIndex for indexing arbitrary title/URL pairs

components/bookmarks/browser/titled_url_match.h

+// Copyright 2016 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 COMPONENTS_BOOKMARKS_BROWSER_TITLED_URL_MATCH_H_
+#define COMPONENTS_BOOKMARKS_BROWSER_TITLED_URL_MATCH_H_
+
+#include <stddef.h>
+
+#include <cstddef>
+#include <utility>
+#include <vector>
+
+#include "components/bookmarks/browser/titled_url_node.h"
+
+namespace bookmarks {
+
+struct TitledUrlMatch {

[sky, 2016/12/01 20:24:51]

Same comment here.

[mattreynolds, 2016/12/01 23:33:18]

Done.

+  // Each MatchPosition is the [begin, end) positions of a match within a
+  // string.
+  typedef std::pair<size_t, size_t> MatchPosition;
+  typedef std::vector<MatchPosition> MatchPositions;
+
+  TitledUrlMatch();
+  TitledUrlMatch(const TitledUrlMatch& other);
+  ~TitledUrlMatch();
+
+  // Extracts and returns the offsets from |match_positions|.
+  static std::vector<size_t> OffsetsFromMatchPositions(
+      const MatchPositions& match_positions);
+
+  // Replaces the offsets in |match_positions| with those given in |offsets|,
+  // deleting any which are npos, and returns the updated list of match
+  // positions.
+  static MatchPositions ReplaceOffsetsInMatchPositions(
+      const MatchPositions& match_positions,
+      const std::vector<size_t>& offsets);
+
+  // The matching node of a query.
+  const TitledUrlNode* node;
+
+  // Location of the matching words in the title of the node.
+  MatchPositions title_match_positions;
+
+  // Location of the matching words in the URL of the node.
+  MatchPositions url_match_positions;
+};
+
+}  // namespace bookmarks
+
+#endif  // COMPONENTS_BOOKMARKS_BROWSER_TITLED_URL_MATCH_H_