components/sync_driver/revisit/current_tab_matcher.h

   1 // Copyright 2015 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 COMPONENTS_SYNC_DRIVER_CURRENT_TAB_MATCHER_H_
   6 #define COMPONENTS_SYNC_DRIVER_CURRENT_TAB_MATCHER_H_
   7
   8 #include "base/gtest_prod_util.h"
   9 #include "components/sessions/session_types.h"
  10 #include "components/sync_driver/revisit/page_equality.h"
  11 #include "components/sync_driver/revisit/page_visit_observer.h"
  12
  13 namespace sync_driver {
  14
  15 // This class checks the current navigation entry for the given tabs to see if
  16 // they correspond to the same page we were constructed to look for. Upon
  17 // finding multiple matches, the most recently modified will be chosen.
  18 class CurrentTabMatcher {
  19  public:
  20   explicit CurrentTabMatcher(const PageEquality& page_equality);
  21   void Check(const sessions::SessionTab* tab);
  22   void Emit(const PageVisitObserver::TransitionType transition);
  23
  24  private:
  25   FRIEND_TEST_ALL_PREFIXES(CurrentTabMatcherTest, Timestamp);
  26
  27   const PageEquality page_equality_;
  28   const sessions::SessionTab* most_recent_match_ = nullptr;
  29
  30   DISALLOW_COPY_AND_ASSIGN(CurrentTabMatcher);
  31 };
  32
  33 }  // namespace sync_driver
  34
  35 #endif  // COMPONENTS_SYNC_DRIVER_CURRENT_TAB_MATCHER_H_