chrome/browser/ui/app_list/search/search_provider.h

   1 // Copyright 2013 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_UI_APP_LIST_SEARCH_SEARCH_PROVIDER_H_
   6 #define CHROME_BROWSER_UI_APP_LIST_SEARCH_SEARCH_PROVIDER_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/callback.h"
  10 #include "base/memory/scoped_ptr.h"
  11 #include "base/memory/scoped_vector.h"
  12 #include "base/strings/string16.h"
  13
  14 namespace app_list {
  15
  16 class ChromeSearchResult;
  17
  18 class SearchProvider {
  19  public:
  20   typedef ScopedVector<ChromeSearchResult> Results;
  21   typedef base::Closure ResultChangedCallback;
  22
  23   SearchProvider();
  24   virtual ~SearchProvider();
  25
  26   // Invoked to start a query.
  27   virtual void Start(const base::string16& query) = 0;
  28
  29   // Invoked to stop the current query and no more results changes.
  30   virtual void Stop() = 0;
  31
  32   void set_result_changed_callback(const ResultChangedCallback& callback) {
  33     result_changed_callback_ = callback;
  34   }
  35
  36   const Results& results() const { return results_; }
  37
  38  protected:
  39   // Interface for the derived class to generate search results.
  40   void Add(scoped_ptr<ChromeSearchResult> result);
  41   void ClearResults();
  42
  43  private:
  44   void FireResultChanged();
  45
  46   ResultChangedCallback result_changed_callback_;
  47   Results results_;
  48
  49   DISALLOW_COPY_AND_ASSIGN(SearchProvider);
  50 };
  51
  52 }  // namespace app_list
  53
  54 #endif  // CHROME_BROWSER_UI_APP_LIST_SEARCH_SEARCH_PROVIDER_H_