dali-toolkit/devel-api/controls/control-accessible.cpp

   1 /*
   2  * Copyright (c) 2021 Samsung Electronics Co., Ltd.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  *
  16  */
  17
  18 // CLASS HEADER
  19 #include "control-accessible.h"
  20
  21 // EXTERNAL INCLUDES
  22 #ifdef DGETTEXT_ENABLED
  23 #include <libintl.h>
  24 #endif
  25
  26 #include <dali/devel-api/actors/actor-devel.h>
  27 #include <dali/devel-api/adaptor-framework/window-devel.h>
  28
  29 // INTERNAL INCLUDES
  30 #include <dali-toolkit/devel-api/asset-manager/asset-manager.h>
  31 #include <dali-toolkit/internal/controls/control/control-data-impl.h>
  32 #include <dali-toolkit/public-api/controls/control-impl.h>
  33 #include <dali-toolkit/public-api/controls/control.h>
  34 #include <dali-toolkit/public-api/controls/image-view/image-view.h>
  35 #include <dali-toolkit/public-api/focus-manager/keyboard-focus-manager.h>
  36
  37 namespace Dali::Toolkit::DevelControl
  38 {
  39 namespace
  40 {
  41 static std::string GetLocaleText(std::string string, const char *domain = "dali-toolkit")
  42 {
  43 #ifdef DGETTEXT_ENABLED
  44     /*TODO: currently non-localized string is used as a key for translation lookup. In case the lookup key formatting is forced
  45           consider calling utility function for converting non-localized string into well-formatted key before lookup. */
  46     return dgettext(domain, string.c_str());
  47 #else
  48     return string;
  49 #endif
  50 }
  51
  52 static Dali::Actor CreateHighlightIndicatorActor()
  53 {
  54   std::string focusBorderImagePath(AssetManager::GetDaliImagePath());
  55   focusBorderImagePath += "/keyboard_focus.9.png";
  56
  57   // Create the default if it hasn't been set and one that's shared by all the
  58   // keyboard focusable actors
  59   auto actor = Toolkit::ImageView::New(focusBorderImagePath);
  60   actor.SetResizePolicy(ResizePolicy::FILL_TO_PARENT, Dimension::ALL_DIMENSIONS);
  61
  62   DevelControl::AppendAccessibilityAttribute(actor, "highlight", std::string());
  63   actor.SetProperty(Toolkit::DevelControl::Property::ACCESSIBILITY_HIGHLIGHTABLE, false);
  64
  65   return actor;
  66 }
  67 } // unnamed namespace
  68
  69 ControlAccessible::ControlAccessible(Dali::Actor self, Dali::Accessibility::Role role, bool modal)
  70 : ActorAccessible(self),
  71   mIsModal(modal)
  72 {
  73   auto control = Dali::Toolkit::Control::DownCast(Self());
  74
  75   Internal::Control&       internalControl = Toolkit::Internal::GetImplementation(control);
  76   Internal::Control::Impl& controlImpl     = Internal::Control::Impl::Get(internalControl);
  77   if(controlImpl.mAccessibilityRole == Dali::Accessibility::Role::UNKNOWN)
  78   {
  79     controlImpl.mAccessibilityRole = role;
  80   }
  81
  82   Self().PropertySetSignal().Connect(&controlImpl, [this, &controlImpl](Dali::Handle& handle, Dali::Property::Index index, Dali::Property::Value value) {
  83     if(this->Self() != Dali::Accessibility::Accessible::GetCurrentlyHighlightedActor())
  84     {
  85       return;
  86     }
  87
  88     if(index == DevelControl::Property::ACCESSIBILITY_NAME || (index == GetNamePropertyIndex() && !controlImpl.mAccessibilityNameSet))
  89     {
  90       if(controlImpl.mAccessibilityGetNameSignal.Empty())
  91       {
  92         Emit(Dali::Accessibility::ObjectPropertyChangeEvent::NAME);
  93       }
  94     }
  95
  96     if(index == DevelControl::Property::ACCESSIBILITY_DESCRIPTION || (index == GetDescriptionPropertyIndex() && !controlImpl.mAccessibilityDescriptionSet))
  97     {
  98       if(controlImpl.mAccessibilityGetDescriptionSignal.Empty())
  99       {
 100         Emit(Dali::Accessibility::ObjectPropertyChangeEvent::DESCRIPTION);
 101       }
 102     }
 103   });
 104 }
 105
 106 std::string ControlAccessible::GetName() const
 107 {
 108   auto control = Dali::Toolkit::Control::DownCast(Self());
 109
 110   Internal::Control&       internalControl = Toolkit::Internal::GetImplementation(control);
 111   Internal::Control::Impl& controlImpl     = Internal::Control::Impl::Get(internalControl);
 112   std::string name;
 113
 114   if(!controlImpl.mAccessibilityGetNameSignal.Empty())
 115   {
 116     controlImpl.mAccessibilityGetNameSignal.Emit(name);
 117   }
 118   else if(controlImpl.mAccessibilityNameSet)
 119   {
 120     name = controlImpl.mAccessibilityName;
 121   }
 122   else if(auto raw = GetNameRaw(); !raw.empty())
 123   {
 124     name = raw;
 125   }
 126   else
 127   {
 128     name = Self().GetProperty<std::string>(Actor::Property::NAME);
 129   }
 130
 131   if(controlImpl.mAccessibilityTranslationDomainSet)
 132   {
 133     return GetLocaleText(name, controlImpl.mAccessibilityTranslationDomain.c_str());
 134   }
 135
 136   return GetLocaleText(name);
 137 }
 138
 139 std::string ControlAccessible::GetNameRaw() const
 140 {
 141   return {};
 142 }
 143
 144 std::string ControlAccessible::GetDescription() const
 145 {
 146   auto control = Dali::Toolkit::Control::DownCast(Self());
 147
 148   Internal::Control&       internalControl = Toolkit::Internal::GetImplementation(control);
 149   Internal::Control::Impl& controlImpl     = Internal::Control::Impl::Get(internalControl);
 150   std::string description;
 151
 152   if(!controlImpl.mAccessibilityGetDescriptionSignal.Empty())
 153   {
 154     controlImpl.mAccessibilityGetDescriptionSignal.Emit(description);
 155   }
 156   else if(controlImpl.mAccessibilityDescriptionSet)
 157   {
 158     description = controlImpl.mAccessibilityDescription;
 159   }
 160   else
 161   {
 162     description = GetDescriptionRaw();
 163   }
 164   if(controlImpl.mAccessibilityTranslationDomainSet)
 165   {
 166     return GetLocaleText(description, controlImpl.mAccessibilityTranslationDomain.c_str());
 167   }
 168
 169   return GetLocaleText(description);
 170 }
 171
 172 std::string ControlAccessible::GetDescriptionRaw() const
 173 {
 174   return {};
 175 }
 176
 177 Dali::Accessibility::Role ControlAccessible::GetRole() const
 178 {
 179   return Self().GetProperty<Dali::Accessibility::Role>(Toolkit::DevelControl::Property::ACCESSIBILITY_ROLE);
 180 }
 181
 182 std::string ControlAccessible::GetLocalizedRoleName() const
 183 {
 184   return GetLocaleText(GetRoleName());
 185 }
 186
 187 bool ControlAccessible::IsShowing()
 188 {
 189   Dali::Actor self = Self();
 190   if(!self.GetProperty<bool>(Actor::Property::VISIBLE) || self.GetProperty<Vector4>(Actor::Property::WORLD_COLOR).a == 0 || self.GetProperty<bool>(Dali::DevelActor::Property::CULLED))
 191   {
 192     return false;
 193   }
 194
 195   auto* child  = this;
 196   auto* parent = dynamic_cast<Toolkit::DevelControl::ControlAccessible*>(child->GetParent());
 197   if(!parent)
 198   {
 199     return true;
 200   }
 201
 202   auto childExtent = child->GetExtents(Dali::Accessibility::CoordinateType::WINDOW);
 203   while(parent)
 204   {
 205     auto control      = Dali::Toolkit::Control::DownCast(parent->Self());
 206     if(!control.GetProperty<bool>(Actor::Property::VISIBLE))
 207     {
 208       return false;
 209     }
 210     auto clipMode     = control.GetProperty(Actor::Property::CLIPPING_MODE).Get<bool>();
 211     auto parentExtent = parent->GetExtents(Dali::Accessibility::CoordinateType::WINDOW);
 212     if ((clipMode != ClippingMode::DISABLED) && !parentExtent.Intersects(childExtent))
 213     {
 214       return false;
 215     }
 216     parent = dynamic_cast<Toolkit::DevelControl::ControlAccessible*>(parent->GetParent());
 217   }
 218
 219   return true;
 220 }
 221
 222 Dali::Accessibility::States ControlAccessible::CalculateStates()
 223 {
 224   Dali::Actor self = Self();
 225   Dali::Accessibility::States state;
 226   state[Dali::Accessibility::State::FOCUSABLE] = self.GetProperty<bool>(Actor::Property::KEYBOARD_FOCUSABLE);
 227   state[Dali::Accessibility::State::FOCUSED]   = Toolkit::KeyboardFocusManager::Get().GetCurrentFocusActor() == self;
 228
 229   if(self.GetProperty(Toolkit::DevelControl::Property::ACCESSIBILITY_HIGHLIGHTABLE).GetType() == Dali::Property::NONE)
 230   {
 231     state[Dali::Accessibility::State::HIGHLIGHTABLE] = false;
 232   }
 233   else
 234   {
 235     state[Dali::Accessibility::State::HIGHLIGHTABLE] = self.GetProperty(Toolkit::DevelControl::Property::ACCESSIBILITY_HIGHLIGHTABLE).Get<bool>();
 236   }
 237
 238   state[Dali::Accessibility::State::HIGHLIGHTED] = GetCurrentlyHighlightedActor() == self;
 239   state[Dali::Accessibility::State::ENABLED]     = true;
 240   state[Dali::Accessibility::State::SENSITIVE]   = true;
 241   state[Dali::Accessibility::State::VISIBLE]     = self.GetProperty<bool>(Actor::Property::VISIBLE);
 242
 243   if(mIsModal)
 244   {
 245     state[Dali::Accessibility::State::MODAL] = true;
 246   }
 247   state[Dali::Accessibility::State::SHOWING] = IsShowing();
 248   state[Dali::Accessibility::State::DEFUNCT] = !self.GetProperty(Dali::DevelActor::Property::CONNECTED_TO_SCENE).Get<bool>();
 249   return state;
 250 }
 251
 252 Dali::Accessibility::States ControlAccessible::GetStates()
 253 {
 254   return CalculateStates();
 255 }
 256
 257 Dali::Accessibility::Attributes ControlAccessible::GetAttributes() const
 258 {
 259   std::unordered_map<std::string, std::string> attributeMap;
 260   auto control = Dali::Toolkit::Control::DownCast(Self());
 261   auto attribute = control.GetProperty(Dali::Toolkit::DevelControl::Property::ACCESSIBILITY_ATTRIBUTES);
 262   auto map = attribute.GetMap();
 263
 264   if(map)
 265   {
 266     auto mapSize = map->Count();
 267
 268     for(unsigned int i = 0; i < mapSize; i++)
 269     {
 270       auto mapKey = map->GetKeyAt(i);
 271       if(mapKey.type == Dali::Property::Key::STRING)
 272       {
 273         std::string mapValue;
 274         if(map->GetValue(i).Get(mapValue))
 275         {
 276           attributeMap.emplace(std::move(mapKey.stringKey), std::move(mapValue));
 277         }
 278       }
 279     }
 280   }
 281
 282   return attributeMap;
 283 }
 284
 285 bool ControlAccessible::IsHidden() const
 286 {
 287   auto control = Dali::Toolkit::Control::DownCast(Self());
 288
 289   Internal::Control&       internalControl = Toolkit::Internal::GetImplementation(control);
 290   Internal::Control::Impl& controlImpl     = Internal::Control::Impl::Get(internalControl);
 291
 292   return controlImpl.mAccessibilityHidden;
 293 }
 294
 295 bool ControlAccessible::GrabFocus()
 296 {
 297   return Toolkit::KeyboardFocusManager::Get().SetCurrentFocusActor(Self());
 298 }
 299
 300 void ControlAccessible::ScrollToSelf()
 301 {
 302   auto* child = this;
 303   auto* parent = dynamic_cast<Toolkit::DevelControl::ControlAccessible*>(child->GetParent());
 304
 305   while (parent)
 306   {
 307     if (parent->IsScrollable())
 308     {
 309       parent->ScrollToChild(child->Self());
 310     }
 311
 312     parent = dynamic_cast<Toolkit::DevelControl::ControlAccessible*>(parent->GetParent());
 313   }
 314 }
 315
 316 void ControlAccessible::RegisterPositionPropertyNotification()
 317 {
 318   auto                     control         = Dali::Toolkit::Control::DownCast(Self());
 319   Internal::Control&       internalControl = Toolkit::Internal::GetImplementation(control);
 320   Internal::Control::Impl& controlImpl     = Internal::Control::Impl::Get(internalControl);
 321   controlImpl.RegisterAccessibilityPositionPropertyNotification();
 322 }
 323
 324 void ControlAccessible::UnregisterPositionPropertyNotification()
 325 {
 326   auto                     control         = Dali::Toolkit::Control::DownCast(Self());
 327   Internal::Control&       internalControl = Toolkit::Internal::GetImplementation(control);
 328   Internal::Control::Impl& controlImpl     = Internal::Control::Impl::Get(internalControl);
 329   controlImpl.UnregisterAccessibilityPositionPropertyNotification();
 330 }
 331
 332 bool ControlAccessible::GrabHighlight()
 333 {
 334   Dali::Actor self = Self();
 335   auto oldHighlightedActor = GetCurrentlyHighlightedActor();
 336
 337   if(!Dali::Accessibility::IsUp())
 338   {
 339     return false;
 340   }
 341
 342   if(self == oldHighlightedActor)
 343   {
 344     return true;
 345   }
 346
 347   // Clear the old highlight.
 348   if(oldHighlightedActor)
 349   {
 350     auto oldHighlightObject = dynamic_cast<Dali::Accessibility::Component*>(Internal::Control::Impl::GetAccessibilityObject(oldHighlightedActor));
 351     if(oldHighlightObject)
 352     {
 353       oldHighlightObject->ClearHighlight();
 354     }
 355   }
 356
 357   auto highlight = GetHighlightActor();
 358   if(!highlight)
 359   {
 360     highlight = CreateHighlightIndicatorActor();
 361     SetHighlightActor(highlight);
 362   }
 363
 364   highlight.SetProperty(Actor::Property::ANCHOR_POINT, AnchorPoint::TOP_LEFT);
 365   highlight.SetProperty(Actor::Property::POSITION_Z, 1.0f);
 366   highlight.SetProperty(Actor::Property::POSITION, Vector2(0.0f, 0.0f));
 367
 368   // Need to set resize policy again, to update SIZE property which is set by
 369   // NUIViewAccessible. The highlight could move from NUIViewAccessible to
 370   // ControlAccessible. In this case, highlight has incorrect size.
 371   highlight.SetResizePolicy(ResizePolicy::FILL_TO_PARENT, Dimension::ALL_DIMENSIONS);
 372
 373   // Remember the highlight actor, so that when the default is changed with
 374   // SetHighlightActor(), the currently displayed highlight can still be cleared.
 375   mCurrentHighlightActor = highlight;
 376   ScrollToSelf();
 377   self.Add(highlight);
 378   SetCurrentlyHighlightedActor(self);
 379   EmitHighlighted(true);
 380   RegisterPositionPropertyNotification();
 381
 382   return true;
 383 }
 384
 385 bool ControlAccessible::ClearHighlight()
 386 {
 387   Dali::Actor self = Self();
 388
 389   if(!Dali::Accessibility::IsUp())
 390   {
 391     return false;
 392   }
 393
 394   if(GetCurrentlyHighlightedActor() == self)
 395   {
 396     UnregisterPositionPropertyNotification();
 397     self.Remove(mCurrentHighlightActor.GetHandle());
 398     mCurrentHighlightActor = {};
 399     SetCurrentlyHighlightedActor({});
 400     EmitHighlighted(false);
 401     return true;
 402   }
 403   return false;
 404 }
 405
 406 std::string ControlAccessible::GetActionName(size_t index) const
 407 {
 408   if(index >= GetActionCount())
 409   {
 410     return {};
 411   }
 412
 413   Dali::TypeInfo type;
 414   Self().GetTypeInfo(type);
 415   DALI_ASSERT_ALWAYS(type && "no TypeInfo object");
 416   return type.GetActionName(index);
 417 }
 418
 419 std::string ControlAccessible::GetLocalizedActionName(size_t index) const
 420 {
 421   return GetLocaleText(GetActionName(index));
 422 }
 423
 424 std::string ControlAccessible::GetActionDescription(size_t index) const
 425 {
 426   return {};
 427 }
 428
 429 size_t ControlAccessible::GetActionCount() const
 430 {
 431   Dali::TypeInfo type;
 432   Self().GetTypeInfo(type);
 433   DALI_ASSERT_ALWAYS(type && "no TypeInfo object");
 434   return type.GetActionCount();
 435 }
 436
 437 std::string ControlAccessible::GetActionKeyBinding(size_t index) const
 438 {
 439   return {};
 440 }
 441
 442 bool ControlAccessible::DoAction(size_t index)
 443 {
 444   std::string actionName = GetActionName(index);
 445   return Self().DoAction(actionName, {});
 446 }
 447
 448 bool ControlAccessible::DoAction(const std::string& name)
 449 {
 450   return Self().DoAction(name, {});
 451 }
 452
 453 bool ControlAccessible::DoGesture(const Dali::Accessibility::GestureInfo& gestureInfo)
 454 {
 455   auto control = Dali::Toolkit::Control::DownCast(Self());
 456
 457   Internal::Control&       internalControl = Toolkit::Internal::GetImplementation(control);
 458   Internal::Control::Impl& controlImpl     = Internal::Control::Impl::Get(internalControl);
 459
 460   if(!controlImpl.mAccessibilityDoGestureSignal.Empty())
 461   {
 462     auto ret = std::make_pair(gestureInfo, false);
 463     controlImpl.mAccessibilityDoGestureSignal.Emit(ret);
 464     return ret.second;
 465   }
 466
 467   return false;
 468 }
 469
 470 std::vector<Dali::Accessibility::Relation> ControlAccessible::GetRelationSet()
 471 {
 472   auto control = Dali::Toolkit::Control::DownCast(Self());
 473
 474   Internal::Control&       internalControl = Toolkit::Internal::GetImplementation(control);
 475   Internal::Control::Impl& controlImpl     = Internal::Control::Impl::Get(internalControl);
 476
 477   std::vector<Dali::Accessibility::Relation> ret;
 478
 479   for(auto& relation : controlImpl.mAccessibilityRelations)
 480   {
 481     auto& targets = relation.second;
 482
 483     ret.emplace_back(Accessibility::Relation{relation.first, {}});
 484
 485     // Map every Accessible* to its Address
 486     std::transform(targets.begin(), targets.end(), std::back_inserter(ret.back().targets), [](auto* x) {
 487       return x->GetAddress();
 488     });
 489   }
 490
 491   return ret;
 492 }
 493
 494 bool ControlAccessible::ScrollToChild(Actor child)
 495 {
 496   return false;
 497 }
 498
 499 Dali::Property::Index ControlAccessible::GetNamePropertyIndex()
 500 {
 501   return Actor::Property::NAME;
 502 }
 503
 504 Dali::Property::Index ControlAccessible::GetDescriptionPropertyIndex()
 505 {
 506   return Dali::Property::INVALID_INDEX;
 507 }
 508
 509 void ControlAccessible::SetLastPosition(Vector2 position)
 510 {
 511   mLastPosition = position;
 512 }
 513
 514 Vector2 ControlAccessible::GetLastPosition() const
 515 {
 516   return mLastPosition;
 517 }
 518
 519 } // namespace Dali::Toolkit::DevelControl