Issue #1391 - Remove the DOM battery API

1 files changed, 0 insertions, 508 deletions

diff --git a/hal/linux/UPowerClient.cpp b/hal/linux/UPowerClient.cpp
deleted file mode 100644
index 9f6e04379e..0000000000
--- a/hal/linux/UPowerClient.cpp
+++ /dev/null
@@ -1,508 +0,0 @@
-/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-#include "Hal.h"
-#include "HalLog.h"
-#include <dbus/dbus-glib.h>
-#include <dbus/dbus-glib-lowlevel.h>
-#include <mozilla/Attributes.h>
-#include <mozilla/dom/battery/Constants.h>
-#include "nsAutoRef.h"
-#include <cmath>
-
-/*
- * Helper that manages the destruction of glib objects as soon as they leave
- * the current scope.
- *
- * We are specializing nsAutoRef class.
- */
-
-template <>
-class nsAutoRefTraits<GHashTable> : public nsPointerRefTraits<GHashTable>
-{
-public:
-  static void Release(GHashTable* ptr) { g_hash_table_unref(ptr); }
-};
-
-using namespace mozilla::dom::battery;
-
-namespace mozilla {
-namespace hal_impl {
-
-/**
- * This is the declaration of UPowerClient class. This class is listening and
- * communicating to upower daemon through DBus.
- * There is no header file because this class shouldn't be public.
- */
-class UPowerClient
-{
-public:
-  static UPowerClient* GetInstance();
-
-  void BeginListening();
-  void StopListening();
-
-  double GetLevel();
-  bool   IsCharging();
-  double GetRemainingTime();
-
-  ~UPowerClient();
-
-private:
-  UPowerClient();
-
-  enum States {
-    eState_Unknown = 0,
-    eState_Charging,
-    eState_Discharging,
-    eState_Empty,
-    eState_FullyCharged,
-    eState_PendingCharge,
-    eState_PendingDischarge
-  };
-
-  /**
-   * Update the currently tracked device.
-   * @return whether everything went ok.
-   */
-  void UpdateTrackedDeviceSync();
-
-  /**
-   * Returns a hash table with the properties of aDevice.
-   * Note: the caller has to unref the hash table.
-   */
-  GHashTable* GetDevicePropertiesSync(DBusGProxy* aProxy);
-  void GetDevicePropertiesAsync(DBusGProxy* aProxy);
-  static void GetDevicePropertiesCallback(DBusGProxy* aProxy,
-                                          DBusGProxyCall* aCall,
-                                          void* aData);
-
-  /**
-   * Using the device properties (aHashTable), this method updates the member
-   * variable storing the values we care about.
-   */
-  void UpdateSavedInfo(GHashTable* aHashTable);
-
-  /**
-   * Callback used by 'DeviceChanged' signal.
-   */
-  static void DeviceChanged(DBusGProxy* aProxy, const gchar* aObjectPath,
-                            UPowerClient* aListener);
-
-  /**
-   * Callback used by 'PropertiesChanged' signal.
-   * This method is called when the the battery level changes.
-   * (Only with upower >= 0.99)
-   */
-  static void PropertiesChanged(DBusGProxy* aProxy, const gchar*,
-                                GHashTable*, char**,
-                                UPowerClient* aListener);
-
-  /**
-   * Callback called when mDBusConnection gets a signal.
-   */
-  static DBusHandlerResult ConnectionSignalFilter(DBusConnection* aConnection,
-                                                  DBusMessage* aMessage,
-                                                  void* aData);
-
-  // The DBus connection object.
-  DBusGConnection* mDBusConnection;
-
-  // The DBus proxy object to upower.
-  DBusGProxy* mUPowerProxy;
-
-  // The path of the tracked device.
-  gchar* mTrackedDevice;
-
-  // The DBusGProxy for the tracked device.
-  DBusGProxy* mTrackedDeviceProxy;
-
-  double mLevel;
-  bool mCharging;
-  double mRemainingTime;
-
-  static UPowerClient* sInstance;
-
-  static const guint sDeviceTypeBattery = 2;
-  static const guint64 kUPowerUnknownRemainingTime = 0;
-};
-
-/*
- * Implementation of mozilla::hal_impl::EnableBatteryNotifications,
- *                   mozilla::hal_impl::DisableBatteryNotifications,
- *               and mozilla::hal_impl::GetCurrentBatteryInformation.
- */
-
-void
-EnableBatteryNotifications()
-{
-  UPowerClient::GetInstance()->BeginListening();
-}
-
-void
-DisableBatteryNotifications()
-{
-  UPowerClient::GetInstance()->StopListening();
-}
-
-void
-GetCurrentBatteryInformation(hal::BatteryInformation* aBatteryInfo)
-{
-  UPowerClient* upowerClient = UPowerClient::GetInstance();
-
-  aBatteryInfo->level() = upowerClient->GetLevel();
-  aBatteryInfo->charging() = upowerClient->IsCharging();
-  aBatteryInfo->remainingTime() = upowerClient->GetRemainingTime();
-}
-
-/*
- * Following is the implementation of UPowerClient.
- */
-
-UPowerClient* UPowerClient::sInstance = nullptr;
-
-/* static */ UPowerClient*
-UPowerClient::GetInstance()
-{
-  if (!sInstance) {
-    sInstance = new UPowerClient();
-  }
-
-  return sInstance;
-}
-
-UPowerClient::UPowerClient()
-  : mDBusConnection(nullptr)
-  , mUPowerProxy(nullptr)
-  , mTrackedDevice(nullptr)
-  , mTrackedDeviceProxy(nullptr)
-  , mLevel(kDefaultLevel)
-  , mCharging(kDefaultCharging)
-  , mRemainingTime(kDefaultRemainingTime)
-{
-}
-
-UPowerClient::~UPowerClient()
-{
-  NS_ASSERTION(!mDBusConnection && !mUPowerProxy && !mTrackedDevice && !mTrackedDeviceProxy,
-               "The observers have not been correctly removed! "
-               "(StopListening should have been called)");
-}
-
-void
-UPowerClient::BeginListening()
-{
-  GError* error = nullptr;
-  mDBusConnection = dbus_g_bus_get(DBUS_BUS_SYSTEM, &error);
-
-  if (!mDBusConnection) {
-    HAL_LOG("Failed to open connection to bus: %s\n", error->message);
-    g_error_free(error);
-    return;
-  }
-
-  DBusConnection* dbusConnection =
-    dbus_g_connection_get_connection(mDBusConnection);
-
-  // Make sure we do not exit the entire program if DBus connection get lost.
-  dbus_connection_set_exit_on_disconnect(dbusConnection, false);
-
-  // Listening to signals the DBus connection is going to get so we will know
-  // when it is lost and we will be able to disconnect cleanly.
-  dbus_connection_add_filter(dbusConnection, ConnectionSignalFilter, this,
-                             nullptr);
-
-  mUPowerProxy = dbus_g_proxy_new_for_name(mDBusConnection,
-                                           "org.freedesktop.UPower",
-                                           "/org/freedesktop/UPower",
-                                           "org.freedesktop.UPower");
-
-  UpdateTrackedDeviceSync();
-
-  /*
-   * TODO: we should probably listen to DeviceAdded and DeviceRemoved signals.
-   * If we do that, we would have to disconnect from those in StopListening.
-   * It's not yet implemented because it requires testing hot plugging and
-   * removal of a battery.
-   */
-  dbus_g_proxy_add_signal(mUPowerProxy, "DeviceChanged", G_TYPE_STRING,
-                          G_TYPE_INVALID);
-  dbus_g_proxy_connect_signal(mUPowerProxy, "DeviceChanged",
-                              G_CALLBACK (DeviceChanged), this, nullptr);
-}
-
-void
-UPowerClient::StopListening()
-{
-  // If mDBusConnection isn't initialized, that means we are not really listening.
-  if (!mDBusConnection) {
-    return;
-  }
-
-  dbus_connection_remove_filter(
-      dbus_g_connection_get_connection(mDBusConnection),
-      ConnectionSignalFilter, this);
-
-  dbus_g_proxy_disconnect_signal(mUPowerProxy, "DeviceChanged",
-                                 G_CALLBACK (DeviceChanged), this);
-
-  g_free(mTrackedDevice);
-  mTrackedDevice = nullptr;
-
-  if (mTrackedDeviceProxy) {
-    dbus_g_proxy_disconnect_signal(mTrackedDeviceProxy, "PropertiesChanged",
-                                   G_CALLBACK (PropertiesChanged), this);
-
-    g_object_unref(mTrackedDeviceProxy);
-    mTrackedDeviceProxy = nullptr;
-  }
-
-  g_object_unref(mUPowerProxy);
-  mUPowerProxy = nullptr;
-
-  dbus_g_connection_unref(mDBusConnection);
-  mDBusConnection = nullptr;
-
-  // We should now show the default values, not the latest we got.
-  mLevel = kDefaultLevel;
-  mCharging = kDefaultCharging;
-  mRemainingTime = kDefaultRemainingTime;
-}
-
-void
-UPowerClient::UpdateTrackedDeviceSync()
-{
-  GType typeGPtrArray = dbus_g_type_get_collection("GPtrArray",
-                                                   DBUS_TYPE_G_OBJECT_PATH);
-  GPtrArray* devices = nullptr;
-  GError* error = nullptr;
-
-  // Reset the current tracked device:
-  g_free(mTrackedDevice);
-  mTrackedDevice = nullptr;
-
-  // Reset the current tracked device proxy:
-  if (mTrackedDeviceProxy) {
-    dbus_g_proxy_disconnect_signal(mTrackedDeviceProxy, "PropertiesChanged",
-                                   G_CALLBACK (PropertiesChanged), this);
-
-    g_object_unref(mTrackedDeviceProxy);
-    mTrackedDeviceProxy = nullptr;
-  }
-
-  // If that fails, that likely means upower isn't installed.
-  if (!dbus_g_proxy_call(mUPowerProxy, "EnumerateDevices", &error, G_TYPE_INVALID,
-                         typeGPtrArray, &devices, G_TYPE_INVALID)) {
-    HAL_LOG("Error: %s\n", error->message);
-    g_error_free(error);
-    return;
-  }
-
-  /*
-   * We are looking for the first device that is a battery.
-   * TODO: we could try to combine more than one battery.
-   */
-  for (guint i=0; i<devices->len; ++i) {
-    gchar* devicePath = static_cast<gchar*>(g_ptr_array_index(devices, i));
-
-    DBusGProxy* proxy = dbus_g_proxy_new_from_proxy(mUPowerProxy,
-                                                    "org.freedesktop.DBus.Properties",
-                                                    devicePath);
-
-    nsAutoRef<GHashTable> hashTable(GetDevicePropertiesSync(proxy));
-
-    if (g_value_get_uint(static_cast<const GValue*>(g_hash_table_lookup(hashTable, "Type"))) == sDeviceTypeBattery) {
-      UpdateSavedInfo(hashTable);
-      mTrackedDevice = devicePath;
-      mTrackedDeviceProxy = proxy;
-      break;
-    }
-
-    g_object_unref(proxy);
-    g_free(devicePath);
-  }
-
-  if (mTrackedDeviceProxy) {
-    dbus_g_proxy_add_signal(mTrackedDeviceProxy, "PropertiesChanged",
-                            G_TYPE_STRING,
-                            dbus_g_type_get_map("GHashTable", G_TYPE_STRING,
-                                                G_TYPE_VALUE),
-                            G_TYPE_STRV, G_TYPE_INVALID);
-    dbus_g_proxy_connect_signal(mTrackedDeviceProxy, "PropertiesChanged",
-                                G_CALLBACK (PropertiesChanged), this, nullptr);
-  }
-
-  g_ptr_array_free(devices, true);
-}
-
-/* static */ void
-UPowerClient::DeviceChanged(DBusGProxy* aProxy, const gchar* aObjectPath,
-                            UPowerClient* aListener)
-{
-  if (!aListener->mTrackedDevice) {
-    return;
-  }
-
-#if GLIB_MAJOR_VERSION >= 2 && GLIB_MINOR_VERSION >= 16
-  if (g_strcmp0(aObjectPath, aListener->mTrackedDevice)) {
-#else
-  if (g_ascii_strcasecmp(aObjectPath, aListener->mTrackedDevice)) {
-#endif
-    return;
-  }
-
-  aListener->GetDevicePropertiesAsync(aListener->mTrackedDeviceProxy);
-}
-
-/* static */ void
-UPowerClient::PropertiesChanged(DBusGProxy* aProxy, const gchar*, GHashTable*,
-                                char**, UPowerClient* aListener)
-{
-  aListener->GetDevicePropertiesAsync(aListener->mTrackedDeviceProxy);
-}
-
-/* static */ DBusHandlerResult
-UPowerClient::ConnectionSignalFilter(DBusConnection* aConnection,
-                                     DBusMessage* aMessage, void* aData)
-{
-  if (dbus_message_is_signal(aMessage, DBUS_INTERFACE_LOCAL, "Disconnected")) {
-    static_cast<UPowerClient*>(aData)->StopListening();
-    // We do not return DBUS_HANDLER_RESULT_HANDLED here because the connection
-    // might be shared and some other filters might want to do something.
-  }
-
-  return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
-}
-
-GHashTable*
-UPowerClient::GetDevicePropertiesSync(DBusGProxy* aProxy)
-{
-  GError* error = nullptr;
-  GHashTable* hashTable = nullptr;
-  GType typeGHashTable = dbus_g_type_get_map("GHashTable", G_TYPE_STRING,
-                                            G_TYPE_VALUE);
-  if (!dbus_g_proxy_call(aProxy, "GetAll", &error, G_TYPE_STRING,
-                         "org.freedesktop.UPower.Device", G_TYPE_INVALID,
-                         typeGHashTable, &hashTable, G_TYPE_INVALID)) {
-    HAL_LOG("Error: %s\n", error->message);
-    g_error_free(error);
-    return nullptr;
-  }
-
-  return hashTable;
-}
-
-/* static */ void
-UPowerClient::GetDevicePropertiesCallback(DBusGProxy* aProxy,
-                                          DBusGProxyCall* aCall, void* aData)
-{
-  GError* error = nullptr;
-  GHashTable* hashTable = nullptr;
-  GType typeGHashTable = dbus_g_type_get_map("GHashTable", G_TYPE_STRING,
-                                             G_TYPE_VALUE);
-  if (!dbus_g_proxy_end_call(aProxy, aCall, &error, typeGHashTable,
-                             &hashTable, G_TYPE_INVALID)) {
-    HAL_LOG("Error: %s\n", error->message);
-    g_error_free(error);
-  } else {
-    sInstance->UpdateSavedInfo(hashTable);
-    hal::NotifyBatteryChange(hal::BatteryInformation(sInstance->mLevel,
-                                                     sInstance->mCharging,
-                                                     sInstance->mRemainingTime));
-    g_hash_table_unref(hashTable);
-  }
-}
-
-void
-UPowerClient::GetDevicePropertiesAsync(DBusGProxy* aProxy)
-{
-  dbus_g_proxy_begin_call(aProxy, "GetAll", GetDevicePropertiesCallback, nullptr,
-                          nullptr, G_TYPE_STRING,
-                          "org.freedesktop.UPower.Device", G_TYPE_INVALID);
-}
-
-void
-UPowerClient::UpdateSavedInfo(GHashTable* aHashTable)
-{
-  bool isFull = false;
-
-  /*
-   * State values are confusing...
-   * First of all, after looking at upower sources (0.9.13), it seems that
-   * PendingDischarge and PendingCharge are not used.
-   * In addition, FullyCharged and Empty states are not clear because we do not
-   * know if the battery is actually charging or not. Those values come directly
-   * from sysfs (in the Linux kernel) which have four states: "Empty", "Full",
-   * "Charging" and "Discharging". In sysfs, "Empty" and "Full" are also only
-   * related to the level, not to the charging state.
-   * In this code, we are going to assume that Full means charging and Empty
-   * means discharging because if that is not the case, the state should not
-   * last a long time (actually, it should disappear at the following update).
-   * It might be even very hard to see real cases where the state is Empty and
-   * the battery is charging or the state is Full and the battery is discharging
-   * given that plugging/unplugging the battery should have an impact on the
-   * level.
-   */
-  switch (g_value_get_uint(static_cast<const GValue*>(g_hash_table_lookup(aHashTable, "State")))) {
-    case eState_Unknown:
-      mCharging = kDefaultCharging;
-      break;
-    case eState_FullyCharged:
-      isFull = true;
-      MOZ_FALLTHROUGH;
-    case eState_Charging:
-    case eState_PendingCharge:
-      mCharging = true;
-      break;
-    case eState_Discharging:
-    case eState_Empty:
-    case eState_PendingDischarge:
-      mCharging = false;
-      break;
-  }
-
-  /*
-   * The battery level might be very close to 100% (like 99%) without
-   * increasing. It seems that upower sets the battery state as 'full' in that
-   * case so we should trust it and not even try to get the value.
-   */
-  if (isFull) {
-    mLevel = 1.0;
-  } else {
-    mLevel = round(g_value_get_double(static_cast<const GValue*>(g_hash_table_lookup(aHashTable, "Percentage"))))*0.01;
-  }
-
-  if (isFull) {
-    mRemainingTime = 0;
-  } else {
-    mRemainingTime = mCharging ? g_value_get_int64(static_cast<const GValue*>(g_hash_table_lookup(aHashTable, "TimeToFull")))
-                               : g_value_get_int64(static_cast<const GValue*>(g_hash_table_lookup(aHashTable, "TimeToEmpty")));
-
-    if (mRemainingTime == kUPowerUnknownRemainingTime) {
-      mRemainingTime = kUnknownRemainingTime;
-    }
-  }
-}
-
-double
-UPowerClient::GetLevel()
-{
-  return mLevel;
-}
-
-bool
-UPowerClient::IsCharging()
-{
-  return mCharging;
-}
-
-double
-UPowerClient::GetRemainingTime()
-{
-  return mRemainingTime;
-}
-
-} // namespace hal_impl
-} // namespace mozilla