src/chromeos/dbus/power_policy_controller.cc

   1 // Copyright (c) 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 "chromeos/dbus/power_policy_controller.h"
   6
   7 #include "base/format_macros.h"
   8 #include "base/logging.h"
   9 #include "base/strings/string_util.h"
  10 #include "base/strings/stringprintf.h"
  11 #include "chromeos/dbus/dbus_thread_manager.h"
  12
  13 namespace chromeos {
  14
  15 namespace {
  16
  17 // Appends a description of |field|, a field within |delays|, a
  18 // power_manager::PowerManagementPolicy::Delays object, to |str|, an
  19 // std::string, if the field is set.  |name| is a char* describing the
  20 // field.
  21 #define APPEND_DELAY(str, delays, field, name)                                 \
  22     {                                                                          \
  23       if (delays.has_##field())                                                \
  24         str += base::StringPrintf(name "=%" PRId64 " ", delays.field());       \
  25     }
  26
  27 // Appends descriptions of all of the set delays in |delays|, a
  28 // power_manager::PowerManagementPolicy::Delays object, to |str|, an
  29 // std::string.  |prefix| should be a char* containing either "ac" or
  30 // "battery".
  31 #define APPEND_DELAYS(str, delays, prefix)                                     \
  32     {                                                                          \
  33       APPEND_DELAY(str, delays, screen_dim_ms, prefix "_screen_dim_ms");       \
  34       APPEND_DELAY(str, delays, screen_off_ms, prefix "_screen_off_ms");       \
  35       APPEND_DELAY(str, delays, screen_lock_ms, prefix "_screen_lock_ms");     \
  36       APPEND_DELAY(str, delays, idle_warning_ms, prefix "_idle_warning_ms");   \
  37       APPEND_DELAY(str, delays, idle_ms, prefix "_idle_ms");                   \
  38     }
  39
  40 // Returns the power_manager::PowerManagementPolicy_Action value
  41 // corresponding to |action|.
  42 power_manager::PowerManagementPolicy_Action GetProtoAction(
  43     PowerPolicyController::Action action) {
  44   switch (action) {
  45     case PowerPolicyController::ACTION_SUSPEND:
  46       return power_manager::PowerManagementPolicy_Action_SUSPEND;
  47     case PowerPolicyController::ACTION_STOP_SESSION:
  48       return power_manager::PowerManagementPolicy_Action_STOP_SESSION;
  49     case PowerPolicyController::ACTION_SHUT_DOWN:
  50       return power_manager::PowerManagementPolicy_Action_SHUT_DOWN;
  51     case PowerPolicyController::ACTION_DO_NOTHING:
  52       return power_manager::PowerManagementPolicy_Action_DO_NOTHING;
  53     default:
  54       NOTREACHED() << "Unhandled action " << action;
  55       return power_manager::PowerManagementPolicy_Action_DO_NOTHING;
  56   }
  57 }
  58
  59 }  // namespace
  60
  61 const int PowerPolicyController::kScreenLockAfterOffDelayMs = 10000;  // 10 sec.
  62
  63 // -1 is interpreted as "unset" by powerd, resulting in powerd's default
  64 // delays being used instead.  There are no similarly-interpreted values
  65 // for the other fields, unfortunately (but the constructor-assigned values
  66 // will only reach powerd if Chrome messes up and forgets to override them
  67 // with the pref-assigned values).
  68 PowerPolicyController::PrefValues::PrefValues()
  69     : ac_screen_dim_delay_ms(-1),
  70       ac_screen_off_delay_ms(-1),
  71       ac_screen_lock_delay_ms(-1),
  72       ac_idle_warning_delay_ms(-1),
  73       ac_idle_delay_ms(-1),
  74       battery_screen_dim_delay_ms(-1),
  75       battery_screen_off_delay_ms(-1),
  76       battery_screen_lock_delay_ms(-1),
  77       battery_idle_warning_delay_ms(-1),
  78       battery_idle_delay_ms(-1),
  79       ac_idle_action(ACTION_SUSPEND),
  80       battery_idle_action(ACTION_SUSPEND),
  81       lid_closed_action(ACTION_SUSPEND),
  82       use_audio_activity(true),
  83       use_video_activity(true),
  84       ac_brightness_percent(-1.0),
  85       battery_brightness_percent(-1.0),
  86       allow_screen_wake_locks(true),
  87       enable_auto_screen_lock(false),
  88       presentation_screen_dim_delay_factor(1.0),
  89       user_activity_screen_dim_delay_factor(1.0),
  90       wait_for_initial_user_activity(false) {}
  91
  92 // static
  93 std::string PowerPolicyController::GetPolicyDebugString(
  94     const power_manager::PowerManagementPolicy& policy) {
  95   std::string str;
  96   if (policy.has_ac_delays())
  97     APPEND_DELAYS(str, policy.ac_delays(), "ac");
  98   if (policy.has_battery_delays())
  99     APPEND_DELAYS(str, policy.battery_delays(), "battery");
 100   if (policy.has_ac_idle_action())
 101     str += base::StringPrintf("ac_idle=%d ", policy.ac_idle_action());
 102   if (policy.has_battery_idle_action())
 103     str += base::StringPrintf("battery_idle=%d ", policy.battery_idle_action());
 104   if (policy.has_lid_closed_action())
 105     str += base::StringPrintf("lid_closed=%d ", policy.lid_closed_action());
 106   if (policy.has_use_audio_activity())
 107     str += base::StringPrintf("use_audio=%d ", policy.use_audio_activity());
 108   if (policy.has_use_video_activity())
 109     str += base::StringPrintf("use_video=%d ", policy.use_audio_activity());
 110   if (policy.has_ac_brightness_percent()) {
 111     str += base::StringPrintf("ac_brightness_percent=%f ",
 112         policy.ac_brightness_percent());
 113   }
 114   if (policy.has_battery_brightness_percent()) {
 115     str += base::StringPrintf("battery_brightness_percent=%f ",
 116         policy.battery_brightness_percent());
 117   }
 118   if (policy.has_presentation_screen_dim_delay_factor()) {
 119     str += base::StringPrintf("presentation_screen_dim_delay_factor=%f ",
 120         policy.presentation_screen_dim_delay_factor());
 121   }
 122   if (policy.has_user_activity_screen_dim_delay_factor()) {
 123     str += base::StringPrintf("user_activity_screen_dim_delay_factor=%f ",
 124         policy.user_activity_screen_dim_delay_factor());
 125   }
 126   if (policy.has_wait_for_initial_user_activity()) {
 127     str += base::StringPrintf("wait_for_initial_user_activity=%d ",
 128         policy.wait_for_initial_user_activity());
 129   }
 130   if (policy.has_reason())
 131     str += base::StringPrintf("reason=\"%s\" ", policy.reason().c_str());
 132   base::TrimWhitespace(str, base::TRIM_TRAILING, &str);
 133   return str;
 134 }
 135
 136 PowerPolicyController::PowerPolicyController()
 137     : client_(NULL),
 138       prefs_were_set_(false),
 139       honor_screen_wake_locks_(true),
 140       next_wake_lock_id_(1) {
 141 }
 142
 143 PowerPolicyController::~PowerPolicyController() {
 144   if (client_) {
 145     client_->RemoveObserver(this);
 146     client_ = NULL;
 147   }
 148 }
 149
 150 void PowerPolicyController::Init(DBusThreadManager* manager) {
 151   client_ = manager->GetPowerManagerClient();
 152   client_->AddObserver(this);
 153 }
 154
 155 void PowerPolicyController::ApplyPrefs(const PrefValues& values) {
 156   prefs_policy_.Clear();
 157
 158   power_manager::PowerManagementPolicy::Delays* delays =
 159       prefs_policy_.mutable_ac_delays();
 160   delays->set_screen_dim_ms(values.ac_screen_dim_delay_ms);
 161   delays->set_screen_off_ms(values.ac_screen_off_delay_ms);
 162   delays->set_screen_lock_ms(values.ac_screen_lock_delay_ms);
 163   delays->set_idle_warning_ms(values.ac_idle_warning_delay_ms);
 164   delays->set_idle_ms(values.ac_idle_delay_ms);
 165
 166   // If auto screen-locking is enabled, ensure that the screen is locked soon
 167   // after it's turned off due to user inactivity.
 168   int64 lock_ms = delays->screen_off_ms() + kScreenLockAfterOffDelayMs;
 169   if (values.enable_auto_screen_lock && delays->screen_off_ms() > 0 &&
 170       (delays->screen_lock_ms() <= 0 || lock_ms < delays->screen_lock_ms()) &&
 171       lock_ms < delays->idle_ms()) {
 172     delays->set_screen_lock_ms(lock_ms);
 173   }
 174
 175   delays = prefs_policy_.mutable_battery_delays();
 176   delays->set_screen_dim_ms(values.battery_screen_dim_delay_ms);
 177   delays->set_screen_off_ms(values.battery_screen_off_delay_ms);
 178   delays->set_screen_lock_ms(values.battery_screen_lock_delay_ms);
 179   delays->set_idle_warning_ms(values.battery_idle_warning_delay_ms);
 180   delays->set_idle_ms(values.battery_idle_delay_ms);
 181
 182   lock_ms = delays->screen_off_ms() + kScreenLockAfterOffDelayMs;
 183   if (values.enable_auto_screen_lock && delays->screen_off_ms() > 0 &&
 184       (delays->screen_lock_ms() <= 0 || lock_ms < delays->screen_lock_ms()) &&
 185       lock_ms < delays->idle_ms()) {
 186     delays->set_screen_lock_ms(lock_ms);
 187   }
 188
 189   prefs_policy_.set_ac_idle_action(GetProtoAction(values.ac_idle_action));
 190   prefs_policy_.set_battery_idle_action(
 191       GetProtoAction(values.battery_idle_action));
 192   prefs_policy_.set_lid_closed_action(GetProtoAction(values.lid_closed_action));
 193   prefs_policy_.set_use_audio_activity(values.use_audio_activity);
 194   prefs_policy_.set_use_video_activity(values.use_video_activity);
 195   if (values.ac_brightness_percent >= 0.0)
 196     prefs_policy_.set_ac_brightness_percent(values.ac_brightness_percent);
 197   if (values.battery_brightness_percent >= 0.0) {
 198     prefs_policy_.set_battery_brightness_percent(
 199         values.battery_brightness_percent);
 200   }
 201   prefs_policy_.set_presentation_screen_dim_delay_factor(
 202       values.presentation_screen_dim_delay_factor);
 203   prefs_policy_.set_user_activity_screen_dim_delay_factor(
 204       values.user_activity_screen_dim_delay_factor);
 205   prefs_policy_.set_wait_for_initial_user_activity(
 206       values.wait_for_initial_user_activity);
 207
 208   honor_screen_wake_locks_ = values.allow_screen_wake_locks;
 209
 210   prefs_were_set_ = true;
 211   SendCurrentPolicy();
 212 }
 213
 214 int PowerPolicyController::AddScreenWakeLock(const std::string& reason) {
 215   int id = next_wake_lock_id_++;
 216   screen_wake_locks_[id] = reason;
 217   SendCurrentPolicy();
 218   return id;
 219 }
 220
 221 int PowerPolicyController::AddSystemWakeLock(const std::string& reason) {
 222   int id = next_wake_lock_id_++;
 223   system_wake_locks_[id] = reason;
 224   SendCurrentPolicy();
 225   return id;
 226 }
 227
 228 void PowerPolicyController::RemoveWakeLock(int id) {
 229   if (!screen_wake_locks_.erase(id) && !system_wake_locks_.erase(id))
 230     LOG(WARNING) << "Ignoring request to remove nonexistent wake lock " << id;
 231   else
 232     SendCurrentPolicy();
 233 }
 234
 235 void PowerPolicyController::PowerManagerRestarted() {
 236   SendCurrentPolicy();
 237 }
 238
 239 void PowerPolicyController::SendCurrentPolicy() {
 240   std::string reason;
 241
 242   power_manager::PowerManagementPolicy policy = prefs_policy_;
 243   if (prefs_were_set_)
 244     reason = "Prefs";
 245
 246   if (honor_screen_wake_locks_ && !screen_wake_locks_.empty()) {
 247     policy.mutable_ac_delays()->set_screen_dim_ms(0);
 248     policy.mutable_ac_delays()->set_screen_off_ms(0);
 249     policy.mutable_ac_delays()->set_screen_lock_ms(0);
 250     policy.mutable_battery_delays()->set_screen_dim_ms(0);
 251     policy.mutable_battery_delays()->set_screen_off_ms(0);
 252     policy.mutable_battery_delays()->set_screen_lock_ms(0);
 253   }
 254
 255   if (!screen_wake_locks_.empty() || !system_wake_locks_.empty()) {
 256     if (!policy.has_ac_idle_action() || policy.ac_idle_action() ==
 257         power_manager::PowerManagementPolicy_Action_SUSPEND) {
 258       policy.set_ac_idle_action(
 259           power_manager::PowerManagementPolicy_Action_DO_NOTHING);
 260     }
 261     if (!policy.has_battery_idle_action() || policy.battery_idle_action() ==
 262         power_manager::PowerManagementPolicy_Action_SUSPEND) {
 263       policy.set_battery_idle_action(
 264           power_manager::PowerManagementPolicy_Action_DO_NOTHING);
 265     }
 266   }
 267
 268   for (WakeLockMap::const_iterator it = screen_wake_locks_.begin();
 269        it != screen_wake_locks_.end(); ++it) {
 270     reason += (reason.empty() ? "" : ", ") + it->second;
 271   }
 272   for (WakeLockMap::const_iterator it = system_wake_locks_.begin();
 273        it != system_wake_locks_.end(); ++it) {
 274     reason += (reason.empty() ? "" : ", ") + it->second;
 275   }
 276
 277   if (!reason.empty())
 278     policy.set_reason(reason);
 279   client_->SetPolicy(policy);
 280 }
 281
 282 }  // namespace chromeos