1 #ifndef DALI_INTERNAL_ACCESSIBILITY_BRIDGE_BASE_H
2 #define DALI_INTERNAL_ACCESSIBILITY_BRIDGE_BASE_H
5 * Copyright (c) 2021 Samsung Electronics Co., Ltd.
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
22 #include <dali/public-api/actors/layer.h>
23 #include <dali/public-api/dali-adaptor-version.h>
24 #include <dali/public-api/object/weak-handle.h>
25 #include <dali/public-api/signals/connection-tracker.h>
30 #include <dali/devel-api/adaptor-framework/proxy-accessible.h>
31 #include <dali/devel-api/adaptor-framework/window-devel.h>
32 #include <dali/devel-api/atspi-interfaces/accessible.h>
33 #include <dali/devel-api/atspi-interfaces/application.h>
34 #include <dali/devel-api/atspi-interfaces/collection.h>
35 #include <dali/devel-api/atspi-interfaces/socket.h>
36 #include <dali/internal/accessibility/bridge/accessibility-common.h>
39 * @brief The ApplicationAccessible class is to define Accessibility Application.
41 class ApplicationAccessible : public virtual Dali::Accessibility::Accessible,
42 public virtual Dali::Accessibility::Application,
43 public virtual Dali::Accessibility::Collection,
44 public virtual Dali::Accessibility::Component,
45 public virtual Dali::Accessibility::Socket
48 Dali::Accessibility::ProxyAccessible mParent;
49 std::vector<Dali::Accessibility::Accessible*> mChildren;
51 std::string mToolkitName{"dali"};
52 bool mIsEmbedded{false};
54 std::string GetName() const override
59 std::string GetDescription() const override
64 Dali::Accessibility::Accessible* GetParent() override
69 size_t GetChildCount() const override
71 return mChildren.size();
74 std::vector<Dali::Accessibility::Accessible*> GetChildren() override
79 Dali::Accessibility::Accessible* GetChildAtIndex(size_t index) override
81 auto size = mChildren.size();
84 throw std::domain_error{"invalid index " + std::to_string(index) + " for object with " + std::to_string(size) + " children"};
86 return mChildren[index];
89 size_t GetIndexInParent() override
96 throw std::domain_error{"can't call GetIndexInParent on application object"};
99 Dali::Accessibility::Role GetRole() const override
101 return Dali::Accessibility::Role::APPLICATION;
104 Dali::Accessibility::States GetStates() override
106 Dali::Accessibility::States result;
108 for(auto* child : mChildren)
110 result = result | child->GetStates();
113 // The Application object should never have the SENSITIVE state
114 result[Dali::Accessibility::State::SENSITIVE] = false;
120 * @brief Gets the Accessible object from the window.
122 * @param[in] window The window to find
123 * @return Null if mChildren is empty, otherwise the Accessible object
124 * @note Currently, the default window would be returned when mChildren is not empty.
126 Dali::Accessibility::Accessible* GetWindowAccessible(Dali::Window window)
128 if(mChildren.empty())
133 Dali::Layer rootLayer = window.GetRootLayer();
135 // Find a child which is related to the window.
136 for(auto i = 0u; i < mChildren.size(); ++i)
138 if(rootLayer == mChildren[i]->GetInternalActor())
144 // If can't find its children, return the default window.
148 bool DoGesture(const Dali::Accessibility::GestureInfo& gestureInfo) override
153 std::vector<Dali::Accessibility::Relation> GetRelationSet() override
158 Dali::Actor GetInternalActor() override
160 return Dali::Actor{};
163 Dali::Accessibility::Address GetAddress() const override
170 std::string GetToolkitName() const override
175 std::string GetVersion() const override
177 return std::to_string(Dali::ADAPTOR_MAJOR_VERSION) + "." + std::to_string(Dali::ADAPTOR_MINOR_VERSION);
182 Dali::Accessibility::Address Embed(Dali::Accessibility::Address plug) override
185 mParent.SetAddress(plug);
190 void Unembed(Dali::Accessibility::Address plug) override
192 if(mParent.GetAddress() == plug)
195 mParent.SetAddress({});
196 Dali::Accessibility::Bridge::GetCurrentBridge()->SetExtentsOffset(0, 0);
200 void SetOffset(std::int32_t x, std::int32_t y) override
207 Dali::Accessibility::Bridge::GetCurrentBridge()->SetExtentsOffset(x, y);
212 Dali::Rect<> GetExtents(Dali::Accessibility::CoordinateType type) const override
214 using limits = std::numeric_limits<float>;
216 float minX = limits::max();
217 float minY = limits::max();
218 float maxX = limits::min();
219 float maxY = limits::min();
221 for(Dali::Accessibility::Accessible* child : mChildren)
223 auto* component = Dali::Accessibility::Component::DownCast(child);
229 auto extents = component->GetExtents(type);
231 minX = std::min(minX, extents.x);
232 minY = std::min(minY, extents.y);
233 maxX = std::max(maxX, extents.x + extents.width);
234 maxY = std::max(maxY, extents.y + extents.height);
237 return {minX, minY, maxX - minX, maxY - minY};
240 Dali::Accessibility::ComponentLayer GetLayer() const override
242 return Dali::Accessibility::ComponentLayer::WINDOW;
245 std::int16_t GetMdiZOrder() const override
250 bool GrabFocus() override
255 double GetAlpha() const override
260 bool GrabHighlight() override
265 bool ClearHighlight() override
270 bool IsScrollable() const override
277 * @brief Enumeration for CoalescableMessages.
279 enum class CoalescableMessages
281 BOUNDS_CHANGED, ///< Bounds changed
282 SET_OFFSET, ///< Set offset
285 // Custom specialization of std::hash
289 struct hash<std::pair<CoalescableMessages, Dali::Accessibility::Accessible*>>
291 size_t operator()(std::pair<CoalescableMessages, Dali::Accessibility::Accessible*> value) const
293 return (static_cast<size_t>(value.first) * 131) ^ reinterpret_cast<size_t>(value.second);
299 * @brief The BridgeBase class is basic class for Bridge functions.
301 class BridgeBase : public Dali::Accessibility::Bridge, public Dali::ConnectionTracker
303 std::map<std::pair<CoalescableMessages, Dali::Accessibility::Accessible*>, std::tuple<unsigned int, unsigned int, std::function<void()>>> mCoalescableMessages;
306 * @brief Removes all CoalescableMessages using Tick signal.
308 * @return False if mCoalescableMessages is empty, otherwise true.
310 bool TickCoalescableMessages();
314 * @brief Adds CoalescableMessages, Accessible, and delay time to mCoalescableMessages.
316 * @param[in] kind CoalescableMessages enum value
317 * @param[in] obj Accessible object
318 * @param[in] delay The delay time
319 * @param[in] functor The function to be called // NEED TO UPDATE!
321 void AddCoalescableMessage(CoalescableMessages kind, Dali::Accessibility::Accessible* obj, float delay, std::function<void()> functor);
324 * @brief Callback when the visibility of the window is changed.
326 * @param[in] window The window to be changed
327 * @param[in] visible The visibility of the window
329 void OnWindowVisibilityChanged(Dali::Window window, bool visible);
332 * @brief Callback when the window focus is changed.
334 * @param[in] window The window whose focus is changed
335 * @param[in] focusIn Whether the focus is in/out
337 void OnWindowFocusChanged(Dali::Window window, bool focusIn);
340 * @copydoc Dali::Accessibility::Bridge::GetBusName()
342 const std::string& GetBusName() const override;
345 * @copydoc Dali::Accessibility::Bridge::AddTopLevelWindow()
347 void AddTopLevelWindow(Dali::Accessibility::Accessible* windowAccessible) override;
350 * @copydoc Dali::Accessibility::Bridge::RemoveTopLevelWindow()
352 void RemoveTopLevelWindow(Dali::Accessibility::Accessible* windowAccessible) override;
355 * @copydoc Dali::Accessibility::Bridge::RegisterDefaultLabel()
357 void RegisterDefaultLabel(Dali::Accessibility::Accessible* object) override;
360 * @copydoc Dali::Accessibility::Bridge::UnregisterDefaultLabel()
362 void UnregisterDefaultLabel(Dali::Accessibility::Accessible* object) override;
365 * @copydoc Dali::Accessibility::Bridge::GetDefaultLabel()
367 Dali::Accessibility::Accessible* GetDefaultLabel(Dali::Accessibility::Accessible* root) const override;
370 * @copydoc Dali::Accessibility::Bridge::GetApplication()
372 Dali::Accessibility::Accessible* GetApplication() const override
374 return &mApplication;
378 * @brief Adds function to dbus interface.
380 template<typename SELF, typename... RET, typename... ARGS>
381 void AddFunctionToInterface(
382 DBus::DBusInterfaceDescription& desc, const std::string& funcName, DBus::ValueOrError<RET...> (SELF::*funcPtr)(ARGS...))
384 if(auto self = dynamic_cast<SELF*>(this))
385 desc.addMethod<DBus::ValueOrError<RET...>(ARGS...)>(
387 [=](ARGS... args) -> DBus::ValueOrError<RET...> {
390 return (self->*funcPtr)(std::move(args)...);
392 catch(std::domain_error& e)
394 return DBus::Error{e.what()};
400 * @brief Adds 'Get' property to dbus interface.
402 template<typename T, typename SELF>
403 void AddGetPropertyToInterface(DBus::DBusInterfaceDescription& desc,
404 const std::string& funcName,
405 T (SELF::*funcPtr)())
407 if(auto self = dynamic_cast<SELF*>(this))
408 desc.addProperty<T>(funcName,
409 [=]() -> DBus::ValueOrError<T> {
412 return (self->*funcPtr)();
414 catch(std::domain_error& e)
416 return DBus::Error{e.what()};
423 * @brief Adds 'Set' property to dbus interface.
425 template<typename T, typename SELF>
426 void AddSetPropertyToInterface(DBus::DBusInterfaceDescription& desc,
427 const std::string& funcName,
428 void (SELF::*funcPtr)(T))
430 if(auto self = dynamic_cast<SELF*>(this))
431 desc.addProperty<T>(funcName, {}, [=](T t) -> DBus::ValueOrError<void> {
434 (self->*funcPtr)(std::move(t));
437 catch(std::domain_error& e)
439 return DBus::Error{e.what()};
445 * @brief Adds 'Set' and 'Get' properties to dbus interface.
447 template<typename T, typename T1, typename SELF>
448 void AddGetSetPropertyToInterface(DBus::DBusInterfaceDescription& desc,
449 const std::string& funcName,
450 T1 (SELF::*funcPtrGet)(),
451 DBus::ValueOrError<void> (SELF::*funcPtrSet)(T))
453 if(auto self = dynamic_cast<SELF*>(this))
456 [=]() -> DBus::ValueOrError<T> {
459 return (self->*funcPtrGet)();
461 catch(std::domain_error& e)
463 return DBus::Error{e.what()};
466 [=](T t) -> DBus::ValueOrError<void> {
469 (self->*funcPtrSet)(std::move(t));
472 catch(std::domain_error& e)
474 return DBus::Error{e.what()};
480 * @brief Adds 'Get' and 'Set' properties to dbus interface.
482 template<typename T, typename T1, typename SELF>
483 void AddGetSetPropertyToInterface(DBus::DBusInterfaceDescription& desc,
484 const std::string& funcName,
485 T1 (SELF::*funcPtrGet)(),
486 void (SELF::*funcPtrSet)(T))
488 if(auto self = dynamic_cast<SELF*>(this))
491 [=]() -> DBus::ValueOrError<T> {
494 return (self->*funcPtrGet)();
496 catch(std::domain_error& e)
498 return DBus::Error{e.what()};
501 [=](T t) -> DBus::ValueOrError<void> {
504 (self->*funcPtrSet)(std::move(t));
507 catch(std::domain_error& e)
509 return DBus::Error{e.what()};
515 * @brief Gets the string of the path excluding the specified prefix.
517 * @param path The path to get
518 * @return The string stripped of the specific prefix
520 static std::string StripPrefix(const std::string& path);
523 * @brief Finds the Accessible object according to the path.
525 * @param[in] path The path for Accessible object
526 * @return The Accessible object corresponding to the path
528 Dali::Accessibility::Accessible* Find(const std::string& path) const;
531 * @brief Finds the Accessible object with the given address.
533 * @param[in] ptr The unique Address of the object
534 * @return The Accessible object corresponding to the path
536 Dali::Accessibility::Accessible* Find(const Dali::Accessibility::Address& ptr) const;
539 * @brief Returns the target object of the currently executed DBus method call.
541 * @return The Accessible object
542 * @note When a DBus method is called on some object, this target object (`currentObject`) is temporarily saved by the bridge,
543 * because DBus handles the invocation target separately from the method arguments.
544 * We then use the saved object inside the 'glue' method (e.g. BridgeValue::GetMinimum)
545 * to call the equivalent method on the respective C++ object (this could be ScrollBar::AccessibleImpl::GetMinimum in the example given).
547 Dali::Accessibility::Accessible* FindCurrentObject() const;
550 * @brief Returns the target object of the currently executed DBus method call.
552 * This method tries to downcast the return value of FindCurrentObject() to the requested type,
553 * issuing an error reply to the DBus caller if the requested type is not implemented. Whether
554 * a given type is implemented is decided based on the return value of Accessible::GetInterfaces()
555 * for the current object.
557 * @tparam I The requested AT-SPI interface
558 * @return The Accessible object (cast to a more derived type)
560 * @see FindCurrentObject()
561 * @see Dali::Accessibility::AtspiInterface
562 * @see Dali::Accessibility::AtspiInterfaceType
563 * @see Dali::Accessibility::Accessible::GetInterfaces()
565 template<Dali::Accessibility::AtspiInterface I>
566 auto* FindCurrentObjectWithInterface() const
568 using Type = Dali::Accessibility::AtspiInterfaceType<I>;
571 auto* currentObject = FindCurrentObject();
572 DALI_ASSERT_DEBUG(currentObject); // FindCurrentObject() throws domain_error
574 if(!(result = Dali::Accessibility::Accessible::DownCast<I>(currentObject)))
578 s << "Object " << currentObject->GetAddress().ToString();
579 s << " does not implement ";
580 s << Dali::Accessibility::Accessible::GetInterfaceName(I);
582 throw std::domain_error{s.str()};
589 * @copydoc Dali::Accessibility::Bridge::FindByPath()
591 Dali::Accessibility::Accessible* FindByPath(const std::string& name) const override;
594 * @copydoc Dali::Accessibility::Bridge::SetApplicationName()
596 void SetApplicationName(std::string name) override
598 mApplication.mName = std::move(name);
602 * @copydoc Dali::Accessibility::Bridge::SetToolkitName()
604 void SetToolkitName(std::string_view toolkitName) override
606 mApplication.mToolkitName = std::string{toolkitName};
610 // We use a weak handle in order not to keep a window alive forever if someone forgets to UnregisterDefaultLabel()
611 using DefaultLabelType = std::pair<Dali::WeakHandle<Dali::Window>, Dali::Accessibility::Accessible*>;
612 using DefaultLabelsType = std::list<DefaultLabelType>;
614 mutable ApplicationAccessible mApplication;
615 DefaultLabelsType mDefaultLabels;
616 bool mIsScreenReaderSuppressed = false;
621 * @param[in] id An ID (integer value)
626 * @brief Gets the ID.
627 * @return The ID to be set
632 * @brief Update registered events.
634 void UpdateRegisteredEvents();
636 using CacheElementType = std::tuple<
637 Dali::Accessibility::Address,
638 Dali::Accessibility::Address,
639 Dali::Accessibility::Address,
640 std::vector<Dali::Accessibility::Address>,
641 std::vector<std::string>,
643 Dali::Accessibility::Role,
645 std::array<uint32_t, 2>>;
648 * @brief Gets Items // NEED TO UPDATE!
652 DBus::ValueOrError<std::vector<CacheElementType>> GetItems();
655 * @brief Creates CacheElement.
657 * CreateCacheElement method works for GetItems which is a part of ATSPI protocol.
658 * ATSPI client library (libatspi from at-spi2-core) depending on cacheing policy configuration uses GetItems
659 * to pre-load entire accessible tree from application to its own cache in single dbus call.
660 * Otherwise the particular nodes in a tree are cached lazily when client library tries to access them.
661 * @param item Accessible to get information
662 * @return The elements to be cached
664 CacheElementType CreateCacheElement(Dali::Accessibility::Accessible* item);
667 * @brief Removes expired elements from the default label collection.
669 void CompressDefaultLabels();
672 * @brief Gets the window to which this accessible belongs (or an empty handle).
674 * @param accessible The accessible
677 static Dali::WeakHandle<Dali::Window> GetWindow(Dali::Accessibility::Accessible* accessible);
681 virtual ~BridgeBase();
684 * @copydoc Dali::Accessibility::Bridge::ForceUp()
686 ForceUpResult ForceUp() override;
689 * @copydoc Dali::Accessibility::Bridge::ForceDown()
691 void ForceDown() override;
693 DBus::DBusServer mDbusServer;
694 DBusWrapper::ConnectionPtr mConnectionPtr;
696 DBus::DBusClient mRegistry;
697 bool IsBoundsChangedEventAllowed{false};
700 #endif // DALI_INTERNAL_ACCESSIBILITY_BRIDGE_BASE_H