net/proxy/load_state_change_coalescer.cc

   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 #include "net/proxy/load_state_change_coalescer.h"
   6
   7 namespace net {
   8
   9 LoadStateChangeCoalescer::LoadStateChangeCoalescer(
  10     const base::Callback<void(LoadState)>& callback,
  11     const base::TimeDelta& timeout,
  12     LoadState initial_load_state)
  13     : callback_(callback),
  14       timeout_(timeout),
  15       committed_load_state_(initial_load_state),
  16       pending_load_state_(initial_load_state) {
  17 }
  18
  19 void LoadStateChangeCoalescer::LoadStateChanged(LoadState load_state) {
  20   if (load_state == committed_load_state_) {
  21     timer_.Stop();
  22     return;
  23   }
  24   pending_load_state_ = load_state;
  25   timer_.Start(FROM_HERE, timeout_, this,
  26                &LoadStateChangeCoalescer::SendLoadStateChanged);
  27 }
  28
  29 LoadStateChangeCoalescer::~LoadStateChangeCoalescer() = default;
  30
  31 void LoadStateChangeCoalescer::SendLoadStateChanged() {
  32   committed_load_state_ = pending_load_state_;
  33   callback_.Run(pending_load_state_);
  34 }
  35
  36 }  // namespace net