projecting_observer_chromeos.cc revision 23730a6e56a168d1879203e4b3819bb36e3d8f1f 
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 "ash/display/projecting_observer_chromeos.h"
6
7#include "chromeos/dbus/dbus_thread_manager.h"
8#include "chromeos/dbus/power_manager_client.h"
9#include "ui/display/chromeos/display_snapshot.h"
10
11namespace ash {
12
13namespace internal {
14
15ProjectingObserver::ProjectingObserver()
16    : has_internal_output_(false),
17      output_count_(0),
18      casting_session_count_(0) {}
19
20ProjectingObserver::~ProjectingObserver() {}
21
22void ProjectingObserver::OnDisplayModeChanged(
23    const ui::OutputConfigurator::DisplayStateList& outputs) {
24  has_internal_output_ = false;
25  output_count_ = outputs.size();
26
27  for (size_t i = 0; i < outputs.size(); ++i) {
28    if (outputs[i].display->type() == ui::OUTPUT_TYPE_INTERNAL) {
29      has_internal_output_ = true;
30      break;
31    }
32  }
33
34  SetIsProjecting();
35}
36
37void ProjectingObserver::OnCastingSessionStartedOrStopped(bool started) {
38  if (started) {
39    ++casting_session_count_;
40  } else {
41    DCHECK_GT(casting_session_count_, 0);
42    --casting_session_count_;
43    if (casting_session_count_ < 0)
44      casting_session_count_ = 0;
45  }
46
47  SetIsProjecting();
48}
49
50void ProjectingObserver::SetIsProjecting() {
51  // "Projecting" is defined as having more than 1 output connected while at
52  // least one of them is an internal output.
53  bool projecting = has_internal_output_ &&
54      (output_count_ + casting_session_count_ > 1);
55
56  chromeos::DBusThreadManager::Get()->GetPowerManagerClient()->SetIsProjecting(
57      projecting);
58}
59
60}  // namespace internal
61
62}  // namespace ash
63