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)
  70 : ActorAccessible(self)
  71 {
  72   auto control = Toolkit::Control::DownCast(self);
  73
  74   Internal::Control&       internalControl = Toolkit::Internal::GetImplementation(control);
  75   Internal::Control::Impl& controlImpl     = Internal::Control::Impl::Get(internalControl);
  76
  77   self.PropertySetSignal().Connect(&controlImpl, [this, &controlImpl](Dali::Handle& handle, Dali::Property::Index index, Dali::Property::Value value) {
  78     if(this->Self() != Dali::Accessibility::Accessible::GetCurrentlyHighlightedActor())
  79     {
  80       return;
  81     }
  82
  83     if(index == DevelControl::Property::ACCESSIBILITY_NAME || (index == GetNamePropertyIndex() && controlImpl.mAccessibilityName.empty()))
  84     {
  85       if(controlImpl.mAccessibilityGetNameSignal.Empty())
  86       {
  87         Emit(Dali::Accessibility::ObjectPropertyChangeEvent::NAME);
  88       }
  89     }
  90
  91     if(index == DevelControl::Property::ACCESSIBILITY_DESCRIPTION || (index == GetDescriptionPropertyIndex() && controlImpl.mAccessibilityDescription.empty()))
  92     {
  93       if(controlImpl.mAccessibilityGetDescriptionSignal.Empty())
  94       {
  95         Emit(Dali::Accessibility::ObjectPropertyChangeEvent::DESCRIPTION);
  96       }
  97     }
  98   });
  99 }
 100
 101 std::string ControlAccessible::GetName() const
 102 {
 103   auto control = Dali::Toolkit::Control::DownCast(Self());
 104
 105   Internal::Control&       internalControl = Toolkit::Internal::GetImplementation(control);
 106   Internal::Control::Impl& controlImpl     = Internal::Control::Impl::Get(internalControl);
 107   std::string name;
 108
 109   if(!controlImpl.mAccessibilityGetNameSignal.Empty())
 110   {
 111     controlImpl.mAccessibilityGetNameSignal.Emit(name);
 112   }
 113   else if(!controlImpl.mAccessibilityName.empty())
 114   {
 115     name = controlImpl.mAccessibilityName;
 116   }
 117   else if(auto raw = GetNameRaw(); !raw.empty())
 118   {
 119     name = raw;
 120   }
 121   else
 122   {
 123     name = Self().GetProperty<std::string>(Actor::Property::NAME);
 124   }
 125
 126   if(!controlImpl.mAccessibilityTranslationDomain.empty())
 127   {
 128     return GetLocaleText(name, controlImpl.mAccessibilityTranslationDomain.c_str());
 129   }
 130
 131   return GetLocaleText(name);
 132 }
 133
 134 std::string ControlAccessible::GetNameRaw() const
 135 {
 136   return {};
 137 }
 138
 139 std::string ControlAccessible::GetDescription() const
 140 {
 141   auto control = Dali::Toolkit::Control::DownCast(Self());
 142
 143   Internal::Control&       internalControl = Toolkit::Internal::GetImplementation(control);
 144   Internal::Control::Impl& controlImpl     = Internal::Control::Impl::Get(internalControl);
 145   std::string description;
 146
 147   if(!controlImpl.mAccessibilityGetDescriptionSignal.Empty())
 148   {
 149     controlImpl.mAccessibilityGetDescriptionSignal.Emit(description);
 150   }
 151   else if(!controlImpl.mAccessibilityDescription.empty())
 152   {
 153     description = controlImpl.mAccessibilityDescription;
 154   }
 155   else
 156   {
 157     description = GetDescriptionRaw();
 158   }
 159
 160   if(!controlImpl.mAccessibilityTranslationDomain.empty())
 161   {
 162     return GetLocaleText(description, controlImpl.mAccessibilityTranslationDomain.c_str());
 163   }
 164
 165   return GetLocaleText(description);
 166 }
 167
 168 std::string ControlAccessible::GetDescriptionRaw() const
 169 {
 170   return {};
 171 }
 172
 173 Dali::Accessibility::Role ControlAccessible::GetRole() const
 174 {
 175   return Self().GetProperty<Dali::Accessibility::Role>(Toolkit::DevelControl::Property::ACCESSIBILITY_ROLE);
 176 }
 177
 178 std::string ControlAccessible::GetLocalizedRoleName() const
 179 {
 180   return GetLocaleText(GetRoleName());
 181 }
 182
 183 bool ControlAccessible::IsShowing()
 184 {
 185   Dali::Actor self = Self();
 186   if(!self.GetProperty<bool>(Actor::Property::VISIBLE) || self.GetProperty<Vector4>(Actor::Property::WORLD_COLOR).a == 0 || self.GetProperty<bool>(Dali::DevelActor::Property::CULLED))
 187   {
 188     return false;
 189   }
 190
 191   auto* child  = this;
 192   auto* parent = dynamic_cast<Toolkit::DevelControl::ControlAccessible*>(child->GetParent());
 193   if(!parent)
 194   {
 195     return true;
 196   }
 197
 198   auto childExtent = child->GetExtents(Dali::Accessibility::CoordinateType::WINDOW);
 199   while(parent)
 200   {
 201     auto control      = Dali::Toolkit::Control::DownCast(parent->Self());
 202     if(!control.GetProperty<bool>(Actor::Property::VISIBLE))
 203     {
 204       return false;
 205     }
 206     auto clipMode     = control.GetProperty(Actor::Property::CLIPPING_MODE).Get<bool>();
 207     auto parentExtent = parent->GetExtents(Dali::Accessibility::CoordinateType::WINDOW);
 208     if ((clipMode != ClippingMode::DISABLED) && !parentExtent.Intersects(childExtent))
 209     {
 210       return false;
 211     }
 212     parent = dynamic_cast<Toolkit::DevelControl::ControlAccessible*>(parent->GetParent());
 213   }
 214
 215   return true;
 216 }
 217
 218 Dali::Accessibility::States ControlAccessible::CalculateStates()
 219 {
 220   using Dali::Accessibility::State;
 221
 222   Dali::Actor self = Self();
 223   Dali::Accessibility::States states;
 224
 225   states[State::FOCUSABLE]     = self.GetProperty<bool>(Actor::Property::KEYBOARD_FOCUSABLE);
 226   states[State::FOCUSED]       = Toolkit::KeyboardFocusManager::Get().GetCurrentFocusActor() == self;
 227   states[State::HIGHLIGHTABLE] = self.GetProperty<bool>(Toolkit::DevelControl::Property::ACCESSIBILITY_HIGHLIGHTABLE);
 228   states[State::HIGHLIGHTED]   = GetCurrentlyHighlightedActor() == self;
 229   states[State::ENABLED]       = true;
 230   states[State::SENSITIVE]     = true;
 231   states[State::VISIBLE]       = self.GetProperty<bool>(Actor::Property::VISIBLE);
 232   states[State::SHOWING]       = IsShowing();
 233   states[State::DEFUNCT]       = !self.GetProperty(Dali::DevelActor::Property::CONNECTED_TO_SCENE).Get<bool>();
 234
 235   return states;
 236 }
 237
 238 Dali::Accessibility::States ControlAccessible::GetStates()
 239 {
 240   return CalculateStates();
 241 }
 242
 243 Dali::Accessibility::Attributes ControlAccessible::GetAttributes() const
 244 {
 245   std::unordered_map<std::string, std::string> attributeMap;
 246   auto control = Dali::Toolkit::Control::DownCast(Self());
 247   auto attribute = control.GetProperty(Dali::Toolkit::DevelControl::Property::ACCESSIBILITY_ATTRIBUTES);
 248   auto map = attribute.GetMap();
 249
 250   if(map)
 251   {
 252     auto mapSize = map->Count();
 253
 254     for(unsigned int i = 0; i < mapSize; i++)
 255     {
 256       auto mapKey = map->GetKeyAt(i);
 257       if(mapKey.type == Dali::Property::Key::STRING)
 258       {
 259         std::string mapValue;
 260         if(map->GetValue(i).Get(mapValue))
 261         {
 262           attributeMap.emplace(std::move(mapKey.stringKey), std::move(mapValue));
 263         }
 264       }
 265     }
 266   }
 267
 268   return attributeMap;
 269 }
 270
 271 bool ControlAccessible::IsHidden() const
 272 {
 273   auto control = Dali::Toolkit::Control::DownCast(Self());
 274
 275   Internal::Control&       internalControl = Toolkit::Internal::GetImplementation(control);
 276   Internal::Control::Impl& controlImpl     = Internal::Control::Impl::Get(internalControl);
 277
 278   return controlImpl.mAccessibilityHidden;
 279 }
 280
 281 bool ControlAccessible::GrabFocus()
 282 {
 283   return Toolkit::KeyboardFocusManager::Get().SetCurrentFocusActor(Self());
 284 }
 285
 286 void ControlAccessible::ScrollToSelf()
 287 {
 288   auto* child = this;
 289   auto* parent = dynamic_cast<Toolkit::DevelControl::ControlAccessible*>(child->GetParent());
 290
 291   while (parent)
 292   {
 293     if (parent->IsScrollable())
 294     {
 295       parent->ScrollToChild(child->Self());
 296     }
 297
 298     parent = dynamic_cast<Toolkit::DevelControl::ControlAccessible*>(parent->GetParent());
 299   }
 300 }
 301
 302 void ControlAccessible::RegisterPositionPropertyNotification()
 303 {
 304   auto                     control         = Dali::Toolkit::Control::DownCast(Self());
 305   Internal::Control&       internalControl = Toolkit::Internal::GetImplementation(control);
 306   Internal::Control::Impl& controlImpl     = Internal::Control::Impl::Get(internalControl);
 307   controlImpl.RegisterAccessibilityPositionPropertyNotification();
 308 }
 309
 310 void ControlAccessible::UnregisterPositionPropertyNotification()
 311 {
 312   auto                     control         = Dali::Toolkit::Control::DownCast(Self());
 313   Internal::Control&       internalControl = Toolkit::Internal::GetImplementation(control);
 314   Internal::Control::Impl& controlImpl     = Internal::Control::Impl::Get(internalControl);
 315   controlImpl.UnregisterAccessibilityPositionPropertyNotification();
 316 }
 317
 318 bool ControlAccessible::GrabHighlight()
 319 {
 320   Dali::Actor self = Self();
 321   auto oldHighlightedActor = GetCurrentlyHighlightedActor();
 322
 323   if(!Dali::Accessibility::IsUp())
 324   {
 325     return false;
 326   }
 327
 328   if(self == oldHighlightedActor)
 329   {
 330     return true;
 331   }
 332
 333   // Clear the old highlight.
 334   if(oldHighlightedActor)
 335   {
 336     auto oldHighlightedObject = Dali::Accessibility::Component::DownCast(Accessible::Get(oldHighlightedActor));
 337     if(oldHighlightedObject)
 338     {
 339       oldHighlightedObject->ClearHighlight();
 340     }
 341   }
 342
 343   auto highlight = GetHighlightActor();
 344   if(!highlight)
 345   {
 346     highlight = CreateHighlightIndicatorActor();
 347     SetHighlightActor(highlight);
 348   }
 349
 350   highlight.SetProperty(Actor::Property::ANCHOR_POINT, AnchorPoint::TOP_LEFT);
 351   highlight.SetProperty(Actor::Property::POSITION_Z, 1.0f);
 352   highlight.SetProperty(Actor::Property::POSITION, Vector2(0.0f, 0.0f));
 353
 354   // Need to set resize policy again, to update SIZE property which is set by
 355   // NUIViewAccessible. The highlight could move from NUIViewAccessible to
 356   // ControlAccessible. In this case, highlight has incorrect size.
 357   highlight.SetResizePolicy(ResizePolicy::FILL_TO_PARENT, Dimension::ALL_DIMENSIONS);
 358
 359   // Remember the highlight actor, so that when the default is changed with
 360   // SetHighlightActor(), the currently displayed highlight can still be cleared.
 361   mCurrentHighlightActor = highlight;
 362   ScrollToSelf();
 363   self.Add(highlight);
 364   SetCurrentlyHighlightedActor(self);
 365   EmitHighlighted(true);
 366   RegisterPositionPropertyNotification();
 367
 368   return true;
 369 }
 370
 371 bool ControlAccessible::ClearHighlight()
 372 {
 373   Dali::Actor self = Self();
 374
 375   if(!Dali::Accessibility::IsUp())
 376   {
 377     return false;
 378   }
 379
 380   if(GetCurrentlyHighlightedActor() == self)
 381   {
 382     UnregisterPositionPropertyNotification();
 383     self.Remove(mCurrentHighlightActor.GetHandle());
 384     mCurrentHighlightActor = {};
 385     SetCurrentlyHighlightedActor({});
 386     EmitHighlighted(false);
 387     return true;
 388   }
 389   return false;
 390 }
 391
 392 std::string ControlAccessible::GetActionName(size_t index) const
 393 {
 394   if(index >= GetActionCount())
 395   {
 396     return {};
 397   }
 398
 399   Dali::TypeInfo type;
 400   Self().GetTypeInfo(type);
 401   DALI_ASSERT_ALWAYS(type && "no TypeInfo object");
 402   return type.GetActionName(index);
 403 }
 404
 405 std::string ControlAccessible::GetLocalizedActionName(size_t index) const
 406 {
 407   return GetLocaleText(GetActionName(index));
 408 }
 409
 410 std::string ControlAccessible::GetActionDescription(size_t index) const
 411 {
 412   return {};
 413 }
 414
 415 size_t ControlAccessible::GetActionCount() const
 416 {
 417   Dali::TypeInfo type;
 418   Self().GetTypeInfo(type);
 419   DALI_ASSERT_ALWAYS(type && "no TypeInfo object");
 420   return type.GetActionCount();
 421 }
 422
 423 std::string ControlAccessible::GetActionKeyBinding(size_t index) const
 424 {
 425   return {};
 426 }
 427
 428 bool ControlAccessible::DoAction(size_t index)
 429 {
 430   std::string actionName = GetActionName(index);
 431   return Self().DoAction(actionName, {});
 432 }
 433
 434 bool ControlAccessible::DoAction(const std::string& name)
 435 {
 436   return Self().DoAction(name, {});
 437 }
 438
 439 bool ControlAccessible::DoGesture(const Dali::Accessibility::GestureInfo& gestureInfo)
 440 {
 441   auto control = Dali::Toolkit::Control::DownCast(Self());
 442
 443   Internal::Control&       internalControl = Toolkit::Internal::GetImplementation(control);
 444   Internal::Control::Impl& controlImpl     = Internal::Control::Impl::Get(internalControl);
 445
 446   if(!controlImpl.mAccessibilityDoGestureSignal.Empty())
 447   {
 448     auto ret = std::make_pair(gestureInfo, false);
 449     controlImpl.mAccessibilityDoGestureSignal.Emit(ret);
 450     return ret.second;
 451   }
 452
 453   return false;
 454 }
 455
 456 std::vector<Dali::Accessibility::Relation> ControlAccessible::GetRelationSet()
 457 {
 458   auto control = Dali::Toolkit::Control::DownCast(Self());
 459
 460   return DevelControl::GetAccessibilityRelations(control);
 461 }
 462
 463 bool ControlAccessible::ScrollToChild(Actor child)
 464 {
 465   return false;
 466 }
 467
 468 Dali::Property::Index ControlAccessible::GetNamePropertyIndex()
 469 {
 470   return Actor::Property::NAME;
 471 }
 472
 473 Dali::Property::Index ControlAccessible::GetDescriptionPropertyIndex()
 474 {
 475   return Dali::Property::INVALID_INDEX;
 476 }
 477
 478 void ControlAccessible::SetLastPosition(Vector2 position)
 479 {
 480   mLastPosition = position;
 481 }
 482
 483 Vector2 ControlAccessible::GetLastPosition() const
 484 {
 485   return mLastPosition;
 486 }
 487
 488 } // namespace Dali::Toolkit::DevelControl