chrome/browser/autocomplete/bookmark_provider.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROME_BROWSER_AUTOCOMPLETE_BOOKMARK_PROVIDER_H_
   6 #define CHROME_BROWSER_AUTOCOMPLETE_BOOKMARK_PROVIDER_H_
   7
   8 #include <string>
   9
  10 #include "chrome/browser/autocomplete/autocomplete_input.h"
  11 #include "chrome/browser/autocomplete/autocomplete_match.h"
  12 #include "chrome/browser/autocomplete/autocomplete_provider.h"
  13 #include "chrome/browser/history/snippet.h"
  14
  15 class BookmarkModel;
  16 struct BookmarkTitleMatch;
  17 class Profile;
  18
  19 // This class is an autocomplete provider which quickly (and synchronously)
  20 // provides autocomplete suggestions based on the titles of bookmarks. Page
  21 // titles, URLs, and typed and visit counts of the bookmarks are not currently
  22 // taken into consideration as those factors will have been used by the
  23 // HistoryQuickProvider (HQP) while identifying suggestions.
  24 //
  25 // TODO(mrossetti): Propose a way to coordinate with the HQP the taking of typed
  26 // and visit counts and last visit dates, etc. into consideration while scoring.
  27 class BookmarkProvider : public AutocompleteProvider {
  28  public:
  29   BookmarkProvider(AutocompleteProviderListener* listener, Profile* profile);
  30
  31   // When |minimal_changes| is true short circuit any additional searching and
  32   // leave the previous matches for this provider unchanged, otherwise perform
  33   // a complete search for |input| across all bookmark titles.
  34   virtual void Start(const AutocompleteInput& input,
  35                      bool minimal_changes) OVERRIDE;
  36
  37   // Sets the BookmarkModel for unit tests.
  38   void set_bookmark_model_for_testing(BookmarkModel* bookmark_model) {
  39     bookmark_model_ = bookmark_model;
  40   }
  41
  42  private:
  43   virtual ~BookmarkProvider();
  44
  45   // Performs the actual matching of |input| over the bookmarks and fills in
  46   // |matches_|. If |best_match| then only suggest the single best match,
  47   // otherwise suggest the top |kMaxMatches| matches.
  48   void DoAutocomplete(const AutocompleteInput& input, bool best_match);
  49
  50   // Compose an AutocompleteMatch based on |title_match| that has 1) the URL of
  51   // title_match's bookmark, and 2) the bookmark's title, not the URL's page
  52   // title, as the description.
  53   AutocompleteMatch TitleMatchToACMatch(const BookmarkTitleMatch& title_match);
  54
  55   // Converts |positions| into ACMatchClassifications and returns the
  56   // classifications. |text_length| is used to determine the need to add an
  57   // 'unhighlighted' classification span so the tail of the source string
  58   // properly highlighted.
  59   static ACMatchClassifications ClassificationsFromMatch(
  60       const Snippet::MatchPositions& positions,
  61       size_t text_length);
  62
  63   BookmarkModel* bookmark_model_;
  64
  65   // Languages used during the URL formatting.
  66   std::string languages_;
  67
  68   DISALLOW_COPY_AND_ASSIGN(BookmarkProvider);
  69 };
  70
  71 #endif  // CHROME_BROWSER_AUTOCOMPLETE_BOOKMARK_PROVIDER_H_