chrome/browser/ui/app_list/search/history.cc

   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 #include "chrome/browser/ui/app_list/search/history.h"
   6
   7 #include "base/files/file_path.h"
   8 #include "base/strings/string_util.h"
   9 #include "base/strings/utf_string_conversions.h"
  10 #include "chrome/browser/ui/app_list/search/history_data.h"
  11 #include "chrome/browser/ui/app_list/search/history_data_store.h"
  12 #include "chrome/browser/ui/app_list/search/tokenized_string.h"
  13 #include "content/public/browser/browser_context.h"
  14
  15 namespace app_list {
  16
  17 namespace {
  18
  19 // Normalize the given string by joining all its tokens with a space.
  20 std::string NormalizeString(const std::string& utf8) {
  21   TokenizedString tokenized(base::UTF8ToUTF16(utf8));
  22   return base::UTF16ToUTF8(JoinString(tokenized.tokens(), ' '));
  23 }
  24
  25 }  // namespace
  26
  27 History::History(content::BrowserContext* context)
  28     : browser_context_(context),
  29       data_loaded_(false) {
  30   const char kStoreDataFileName[] = "App Launcher Search";
  31   const size_t kMaxQueryEntries = 1000;
  32   const size_t kMaxSecondaryQueries = 5;
  33
  34   const base::FilePath data_file =
  35       browser_context_->GetPath().AppendASCII(kStoreDataFileName);
  36   store_ = new HistoryDataStore(data_file);
  37   data_.reset(
  38       new HistoryData(store_.get(), kMaxQueryEntries, kMaxSecondaryQueries));
  39   data_->AddObserver(this);
  40 }
  41
  42 History::~History() {
  43   data_->RemoveObserver(this);
  44 }
  45
  46 bool History::IsReady() const {
  47   return data_loaded_;
  48 }
  49
  50 void History::AddLaunchEvent(const std::string& query,
  51                              const std::string& result_id) {
  52   DCHECK(IsReady());
  53   data_->Add(NormalizeString(query), result_id);
  54 }
  55
  56 scoped_ptr<KnownResults> History::GetKnownResults(
  57     const std::string& query) const {
  58   DCHECK(IsReady());
  59   return data_->GetKnownResults(NormalizeString(query)).Pass();
  60 }
  61
  62 void History::OnHistoryDataLoadedFromStore() {
  63   data_loaded_ = true;
  64 }
  65
  66 }  // namespace app_list