components/password_manager/core/browser/log_router.cc

   1 // Copyright 2014 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 "components/password_manager/core/browser/log_router.h"
   6
   7 #include "base/stl_util.h"
   8 #include "components/password_manager/core/browser/log_receiver.h"
   9 #include "components/password_manager/core/browser/password_manager_client.h"
  10
  11 namespace password_manager {
  12
  13 LogRouter::LogRouter() {
  14 }
  15
  16 LogRouter::~LogRouter() {
  17 }
  18
  19 void LogRouter::ProcessLog(const std::string& text) {
  20   // This may not be called when there are no receivers (i.e., the router is
  21   // inactive), because in that case the logs cannot be displayed.
  22   DCHECK(receivers_.might_have_observers());
  23   accumulated_logs_.append(text);
  24   FOR_EACH_OBSERVER(LogReceiver, receivers_, LogSavePasswordProgress(text));
  25 }
  26
  27 bool LogRouter::RegisterClient(PasswordManagerClient* client) {
  28   DCHECK(client);
  29   clients_.AddObserver(client);
  30   return receivers_.might_have_observers();
  31 }
  32
  33 void LogRouter::UnregisterClient(PasswordManagerClient* client) {
  34   DCHECK(clients_.HasObserver(client));
  35   clients_.RemoveObserver(client);
  36 }
  37
  38 std::string LogRouter::RegisterReceiver(LogReceiver* receiver) {
  39   DCHECK(receiver);
  40   DCHECK(accumulated_logs_.empty() || receivers_.might_have_observers());
  41
  42   if (!receivers_.might_have_observers()) {
  43     FOR_EACH_OBSERVER(
  44         PasswordManagerClient, clients_, OnLogRouterAvailabilityChanged(true));
  45   }
  46   receivers_.AddObserver(receiver);
  47   return accumulated_logs_;
  48 }
  49
  50 void LogRouter::UnregisterReceiver(LogReceiver* receiver) {
  51   DCHECK(receivers_.HasObserver(receiver));
  52   receivers_.RemoveObserver(receiver);
  53   if (!receivers_.might_have_observers()) {
  54     accumulated_logs_.clear();
  55     FOR_EACH_OBSERVER(
  56         PasswordManagerClient, clients_, OnLogRouterAvailabilityChanged(false));
  57   }
  58 }
  59
  60 }  // namespace password_manager