dbus/property.cc

   1 // Copyright (c) 2012 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 "dbus/property.h"
   6
   7 #include "base/basictypes.h"
   8 #include "base/bind.h"
   9 #include "base/logging.h"
  10
  11 #include "dbus/message.h"
  12 #include "dbus/object_path.h"
  13 #include "dbus/object_proxy.h"
  14
  15 namespace dbus {
  16
  17 //
  18 // PropertyBase implementation.
  19 //
  20
  21 void PropertyBase::Init(PropertySet* property_set, const std::string& name) {
  22   DCHECK(!property_set_);
  23   property_set_ = property_set;
  24   name_ = name;
  25 }
  26
  27
  28 //
  29 // PropertySet implementation.
  30 //
  31
  32 PropertySet::PropertySet(
  33     ObjectProxy* object_proxy,
  34     const std::string& interface,
  35     const PropertyChangedCallback& property_changed_callback)
  36     : object_proxy_(object_proxy),
  37       interface_(interface),
  38       property_changed_callback_(property_changed_callback),
  39       weak_ptr_factory_(this) {}
  40
  41 PropertySet::~PropertySet() {
  42 }
  43
  44 void PropertySet::RegisterProperty(const std::string& name,
  45                                    PropertyBase* property) {
  46   property->Init(this, name);
  47   properties_map_[name] = property;
  48 }
  49
  50 void PropertySet::ConnectSignals() {
  51   DCHECK(object_proxy_);
  52   object_proxy_->ConnectToSignal(
  53       kPropertiesInterface,
  54       kPropertiesChanged,
  55       base::Bind(&PropertySet::ChangedReceived,
  56                  weak_ptr_factory_.GetWeakPtr()),
  57       base::Bind(&PropertySet::ChangedConnected,
  58                  weak_ptr_factory_.GetWeakPtr()));
  59 }
  60
  61
  62 void PropertySet::ChangedReceived(Signal* signal) {
  63   DCHECK(signal);
  64   MessageReader reader(signal);
  65
  66   std::string interface;
  67   if (!reader.PopString(&interface)) {
  68     LOG(WARNING) << "Property changed signal has wrong parameters: "
  69                  << "expected interface name: " << signal->ToString();
  70     return;
  71   }
  72
  73   if (interface != this->interface())
  74     return;
  75
  76   if (!UpdatePropertiesFromReader(&reader)) {
  77     LOG(WARNING) << "Property changed signal has wrong parameters: "
  78                  << "expected dictionary: " << signal->ToString();
  79   }
  80
  81   // TODO(keybuk): dbus properties api has invalidated properties array
  82   // on the end, we don't handle this right now because I don't know of
  83   // any service that sends it - or what they expect us to do with it.
  84   // Add later when we need it.
  85 }
  86
  87 void PropertySet::ChangedConnected(const std::string& interface_name,
  88                                    const std::string& signal_name,
  89                                    bool success) {
  90   LOG_IF(WARNING, !success) << "Failed to connect to " << signal_name
  91                             << "signal.";
  92 }
  93
  94
  95 void PropertySet::Get(PropertyBase* property, GetCallback callback) {
  96   MethodCall method_call(kPropertiesInterface, kPropertiesGet);
  97   MessageWriter writer(&method_call);
  98   writer.AppendString(interface());
  99   writer.AppendString(property->name());
 100
 101   DCHECK(object_proxy_);
 102   object_proxy_->CallMethod(&method_call,
 103                             ObjectProxy::TIMEOUT_USE_DEFAULT,
 104                             base::Bind(&PropertySet::OnGet,
 105                                        GetWeakPtr(),
 106                                        property,
 107                                        callback));
 108 }
 109
 110 void PropertySet::OnGet(PropertyBase* property, GetCallback callback,
 111                         Response* response) {
 112   if (!response) {
 113     LOG(WARNING) << property->name() << ": Get: failed.";
 114     return;
 115   }
 116
 117   MessageReader reader(response);
 118   if (property->PopValueFromReader(&reader))
 119     NotifyPropertyChanged(property->name());
 120
 121   if (!callback.is_null())
 122     callback.Run(response);
 123 }
 124
 125 void PropertySet::GetAll() {
 126   MethodCall method_call(kPropertiesInterface, kPropertiesGetAll);
 127   MessageWriter writer(&method_call);
 128   writer.AppendString(interface());
 129
 130   DCHECK(object_proxy_);
 131   object_proxy_->CallMethod(&method_call,
 132                             ObjectProxy::TIMEOUT_USE_DEFAULT,
 133                             base::Bind(&PropertySet::OnGetAll,
 134                                        weak_ptr_factory_.GetWeakPtr()));
 135 }
 136
 137 void PropertySet::OnGetAll(Response* response) {
 138   if (!response) {
 139     LOG(WARNING) << "GetAll request failed for: " << interface_;
 140     return;
 141   }
 142
 143   MessageReader reader(response);
 144   if (!UpdatePropertiesFromReader(&reader)) {
 145     LOG(WARNING) << "GetAll response has wrong parameters: "
 146                  << "expected dictionary: " << response->ToString();
 147   }
 148 }
 149
 150 void PropertySet::Set(PropertyBase* property, SetCallback callback) {
 151   MethodCall method_call(kPropertiesInterface, kPropertiesSet);
 152   MessageWriter writer(&method_call);
 153   writer.AppendString(interface());
 154   writer.AppendString(property->name());
 155   property->AppendSetValueToWriter(&writer);
 156
 157   DCHECK(object_proxy_);
 158   object_proxy_->CallMethod(&method_call,
 159                             ObjectProxy::TIMEOUT_USE_DEFAULT,
 160                             base::Bind(&PropertySet::OnSet,
 161                                        GetWeakPtr(),
 162                                        property,
 163                                        callback));
 164 }
 165
 166 void PropertySet::OnSet(PropertyBase* property,
 167                         SetCallback callback,
 168                         Response* response) {
 169   LOG_IF(WARNING, !response) << property->name() << ": Set: failed.";
 170   if (!callback.is_null())
 171     callback.Run(response);
 172 }
 173
 174 bool PropertySet::UpdatePropertiesFromReader(MessageReader* reader) {
 175   DCHECK(reader);
 176   MessageReader array_reader(NULL);
 177   if (!reader->PopArray(&array_reader))
 178     return false;
 179
 180   while (array_reader.HasMoreData()) {
 181     MessageReader dict_entry_reader(NULL);
 182     if (array_reader.PopDictEntry(&dict_entry_reader))
 183       UpdatePropertyFromReader(&dict_entry_reader);
 184   }
 185
 186   return true;
 187 }
 188
 189 bool PropertySet::UpdatePropertyFromReader(MessageReader* reader) {
 190   DCHECK(reader);
 191
 192   std::string name;
 193   if (!reader->PopString(&name))
 194     return false;
 195
 196   PropertiesMap::iterator it = properties_map_.find(name);
 197   if (it == properties_map_.end())
 198     return false;
 199
 200   PropertyBase* property = it->second;
 201   if (property->PopValueFromReader(reader)) {
 202     NotifyPropertyChanged(name);
 203     return true;
 204   } else {
 205     return false;
 206   }
 207 }
 208
 209
 210 void PropertySet::NotifyPropertyChanged(const std::string& name) {
 211   if (!property_changed_callback_.is_null())
 212     property_changed_callback_.Run(name);
 213 }
 214
 215 //
 216 // Property<Byte> specialization.
 217 //
 218
 219 template <>
 220 Property<uint8>::Property() : value_(0) {
 221 }
 222
 223 template <>
 224 bool Property<uint8>::PopValueFromReader(MessageReader* reader) {
 225   return reader->PopVariantOfByte(&value_);
 226 }
 227
 228 template <>
 229 void Property<uint8>::AppendSetValueToWriter(MessageWriter* writer) {
 230   writer->AppendVariantOfByte(set_value_);
 231 }
 232
 233 //
 234 // Property<bool> specialization.
 235 //
 236
 237 template <>
 238 Property<bool>::Property() : value_(false) {
 239 }
 240
 241 template <>
 242 bool Property<bool>::PopValueFromReader(MessageReader* reader) {
 243   return reader->PopVariantOfBool(&value_);
 244 }
 245
 246 template <>
 247 void Property<bool>::AppendSetValueToWriter(MessageWriter* writer) {
 248   writer->AppendVariantOfBool(set_value_);
 249 }
 250
 251 //
 252 // Property<int16> specialization.
 253 //
 254
 255 template <>
 256 Property<int16>::Property() : value_(0) {
 257 }
 258
 259 template <>
 260 bool Property<int16>::PopValueFromReader(MessageReader* reader) {
 261   return reader->PopVariantOfInt16(&value_);
 262 }
 263
 264 template <>
 265 void Property<int16>::AppendSetValueToWriter(MessageWriter* writer) {
 266   writer->AppendVariantOfInt16(set_value_);
 267 }
 268
 269 //
 270 // Property<uint16> specialization.
 271 //
 272
 273 template <>
 274 Property<uint16>::Property() : value_(0) {
 275 }
 276
 277 template <>
 278 bool Property<uint16>::PopValueFromReader(MessageReader* reader) {
 279   return reader->PopVariantOfUint16(&value_);
 280 }
 281
 282 template <>
 283 void Property<uint16>::AppendSetValueToWriter(MessageWriter* writer) {
 284   writer->AppendVariantOfUint16(set_value_);
 285 }
 286
 287 //
 288 // Property<int32> specialization.
 289 //
 290
 291 template <>
 292 Property<int32>::Property() : value_(0) {
 293 }
 294
 295 template <>
 296 bool Property<int32>::PopValueFromReader(MessageReader* reader) {
 297   return reader->PopVariantOfInt32(&value_);
 298 }
 299
 300 template <>
 301 void Property<int32>::AppendSetValueToWriter(MessageWriter* writer) {
 302   writer->AppendVariantOfInt32(set_value_);
 303 }
 304
 305 //
 306 // Property<uint32> specialization.
 307 //
 308
 309 template <>
 310 Property<uint32>::Property() : value_(0) {
 311 }
 312
 313 template <>
 314 bool Property<uint32>::PopValueFromReader(MessageReader* reader) {
 315   return reader->PopVariantOfUint32(&value_);
 316 }
 317
 318 template <>
 319 void Property<uint32>::AppendSetValueToWriter(MessageWriter* writer) {
 320   writer->AppendVariantOfUint32(set_value_);
 321 }
 322
 323 //
 324 // Property<int64> specialization.
 325 //
 326
 327 template <>
 328 Property<int64>::Property() : value_(0), set_value_(0) {
 329 }
 330
 331 template <>
 332 bool Property<int64>::PopValueFromReader(MessageReader* reader) {
 333   return reader->PopVariantOfInt64(&value_);
 334 }
 335
 336 template <>
 337 void Property<int64>::AppendSetValueToWriter(MessageWriter* writer) {
 338   writer->AppendVariantOfInt64(set_value_);
 339 }
 340
 341 //
 342 // Property<uint64> specialization.
 343 //
 344
 345 template <>
 346 Property<uint64>::Property() : value_(0) {
 347 }
 348
 349 template <>
 350 bool Property<uint64>::PopValueFromReader(MessageReader* reader) {
 351   return reader->PopVariantOfUint64(&value_);
 352 }
 353
 354 template <>
 355 void Property<uint64>::AppendSetValueToWriter(MessageWriter* writer) {
 356   writer->AppendVariantOfUint64(set_value_);
 357 }
 358
 359 //
 360 // Property<double> specialization.
 361 //
 362
 363 template <>
 364 Property<double>::Property() : value_(0.0) {
 365 }
 366
 367 template <>
 368 bool Property<double>::PopValueFromReader(MessageReader* reader) {
 369   return reader->PopVariantOfDouble(&value_);
 370 }
 371
 372 template <>
 373 void Property<double>::AppendSetValueToWriter(MessageWriter* writer) {
 374   writer->AppendVariantOfDouble(set_value_);
 375 }
 376
 377 //
 378 // Property<std::string> specialization.
 379 //
 380
 381 template <>
 382 bool Property<std::string>::PopValueFromReader(MessageReader* reader) {
 383   return reader->PopVariantOfString(&value_);
 384 }
 385
 386 template <>
 387 void Property<std::string>::AppendSetValueToWriter(MessageWriter* writer) {
 388   writer->AppendVariantOfString(set_value_);
 389 }
 390
 391 //
 392 // Property<ObjectPath> specialization.
 393 //
 394
 395 template <>
 396 bool Property<ObjectPath>::PopValueFromReader(MessageReader* reader) {
 397   return reader->PopVariantOfObjectPath(&value_);
 398 }
 399
 400 template <>
 401 void Property<ObjectPath>::AppendSetValueToWriter(MessageWriter* writer) {
 402   writer->AppendVariantOfObjectPath(set_value_);
 403 }
 404
 405 //
 406 // Property<std::vector<std::string> > specialization.
 407 //
 408
 409 template <>
 410 bool Property<std::vector<std::string> >::PopValueFromReader(
 411     MessageReader* reader) {
 412   MessageReader variant_reader(NULL);
 413   if (!reader->PopVariant(&variant_reader))
 414     return false;
 415
 416   value_.clear();
 417   return variant_reader.PopArrayOfStrings(&value_);
 418 }
 419
 420 template <>
 421 void Property<std::vector<std::string> >::AppendSetValueToWriter(
 422     MessageWriter* writer) {
 423   MessageWriter variant_writer(NULL);
 424   writer->OpenVariant("as", &variant_writer);
 425   variant_writer.AppendArrayOfStrings(set_value_);
 426   writer->CloseContainer(&variant_writer);
 427 }
 428
 429 //
 430 // Property<std::vector<ObjectPath> > specialization.
 431 //
 432
 433 template <>
 434 bool Property<std::vector<ObjectPath> >::PopValueFromReader(
 435     MessageReader* reader) {
 436   MessageReader variant_reader(NULL);
 437   if (!reader->PopVariant(&variant_reader))
 438     return false;
 439
 440   value_.clear();
 441   return variant_reader.PopArrayOfObjectPaths(&value_);
 442 }
 443
 444 template <>
 445 void Property<std::vector<ObjectPath> >::AppendSetValueToWriter(
 446     MessageWriter* writer) {
 447   MessageWriter variant_writer(NULL);
 448   writer->OpenVariant("ao", &variant_writer);
 449   variant_writer.AppendArrayOfObjectPaths(set_value_);
 450   writer->CloseContainer(&variant_writer);
 451 }
 452
 453 //
 454 // Property<std::vector<uint8> > specialization.
 455 //
 456
 457 template <>
 458 bool Property<std::vector<uint8> >::PopValueFromReader(MessageReader* reader) {
 459   MessageReader variant_reader(NULL);
 460   if (!reader->PopVariant(&variant_reader))
 461     return false;
 462
 463   value_.clear();
 464   const uint8* bytes = NULL;
 465   size_t length = 0;
 466   if (!variant_reader.PopArrayOfBytes(&bytes, &length))
 467     return false;
 468   value_.assign(bytes, bytes + length);
 469   return true;
 470 }
 471
 472 template <>
 473 void Property<std::vector<uint8> >::AppendSetValueToWriter(
 474     MessageWriter* writer) {
 475   MessageWriter variant_writer(NULL);
 476   writer->OpenVariant("ay", &variant_writer);
 477   variant_writer.AppendArrayOfBytes(set_value_.data(), set_value_.size());
 478   writer->CloseContainer(&variant_writer);
 479 }
 480
 481 }  // namespace dbus