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;
119 Dali::Accessibility::Attributes GetAttributes() const override
125 * @brief Gets the Accessible object from the window.
127 * @param[in] window The window to find
128 * @return Null if mChildren is empty, otherwise the Accessible object
129 * @note Currently, the default window would be returned when mChildren is not empty.
131 Dali::Accessibility::Accessible* GetWindowAccessible(Dali::Window window)
133 if(mChildren.empty())
138 Dali::Layer rootLayer = window.GetRootLayer();
140 // Find a child which is related to the window.
141 for(auto i = 0u; i < mChildren.size(); ++i)
143 if(rootLayer == mChildren[i]->GetInternalActor())
149 // If can't find its children, return the default window.
153 bool DoGesture(const Dali::Accessibility::GestureInfo& gestureInfo) override
158 std::vector<Dali::Accessibility::Relation> GetRelationSet() override
163 Dali::Actor GetInternalActor() override
165 return Dali::Actor{};
168 Dali::Accessibility::Address GetAddress() const override
175 std::string GetToolkitName() const override
180 std::string GetVersion() const override
182 return std::to_string(Dali::ADAPTOR_MAJOR_VERSION) + "." + std::to_string(Dali::ADAPTOR_MINOR_VERSION);
187 Dali::Accessibility::Address Embed(Dali::Accessibility::Address plug) override
190 mParent.SetAddress(plug);
195 void Unembed(Dali::Accessibility::Address plug) override
197 if(mParent.GetAddress() == plug)
200 mParent.SetAddress({});
201 Dali::Accessibility::Bridge::GetCurrentBridge()->SetExtentsOffset(0, 0);
205 void SetOffset(std::int32_t x, std::int32_t y) override
212 Dali::Accessibility::Bridge::GetCurrentBridge()->SetExtentsOffset(x, y);
217 Dali::Rect<> GetExtents(Dali::Accessibility::CoordinateType type) const override
219 using limits = std::numeric_limits<float>;
221 float minX = limits::max();
222 float minY = limits::max();
223 float maxX = limits::min();
224 float maxY = limits::min();
226 for(Dali::Accessibility::Accessible* child : mChildren)
228 auto* component = Dali::Accessibility::Component::DownCast(child);
234 auto extents = component->GetExtents(type);
236 minX = std::min(minX, extents.x);
237 minY = std::min(minY, extents.y);
238 maxX = std::max(maxX, extents.x + extents.width);
239 maxY = std::max(maxY, extents.y + extents.height);
242 return {minX, minY, maxX - minX, maxY - minY};
245 Dali::Accessibility::ComponentLayer GetLayer() const override
247 return Dali::Accessibility::ComponentLayer::WINDOW;
250 std::int16_t GetMdiZOrder() const override
255 bool GrabFocus() override
260 double GetAlpha() const override
265 bool GrabHighlight() override
270 bool ClearHighlight() override
275 bool IsScrollable() const override
282 * @brief Enumeration for CoalescableMessages.
284 enum class CoalescableMessages
286 BOUNDS_CHANGED, ///< Bounds changed
287 SET_OFFSET, ///< Set offset
288 POST_RENDER, ///< Post render
291 // Custom specialization of std::hash
295 struct hash<std::pair<CoalescableMessages, Dali::Accessibility::Accessible*>>
297 size_t operator()(std::pair<CoalescableMessages, Dali::Accessibility::Accessible*> value) const
299 return (static_cast<size_t>(value.first) * 131) ^ reinterpret_cast<size_t>(value.second);
305 * @brief The BridgeBase class is basic class for Bridge functions.
307 class BridgeBase : public Dali::Accessibility::Bridge, public Dali::ConnectionTracker
309 std::unordered_map<std::pair<CoalescableMessages, Dali::Accessibility::Accessible*>, std::tuple<unsigned int, unsigned int, std::function<void()>>> mCoalescableMessages;
312 * @brief Removes all CoalescableMessages using Tick signal.
314 * @return False if mCoalescableMessages is empty, otherwise true.
316 bool TickCoalescableMessages();
320 * @brief Adds CoalescableMessages, Accessible, and delay time to mCoalescableMessages.
322 * @param[in] kind CoalescableMessages enum value
323 * @param[in] obj Accessible object
324 * @param[in] delay The delay time
325 * @param[in] functor The function to be called // NEED TO UPDATE!
327 void AddCoalescableMessage(CoalescableMessages kind, Dali::Accessibility::Accessible* obj, float delay, std::function<void()> functor);
330 * @brief Callback when the visibility of the window is changed.
332 * @param[in] window The window to be changed
333 * @param[in] visible The visibility of the window
335 void OnWindowVisibilityChanged(Dali::Window window, bool visible);
338 * @brief Callback when the window focus is changed.
340 * @param[in] window The window whose focus is changed
341 * @param[in] focusIn Whether the focus is in/out
343 void OnWindowFocusChanged(Dali::Window window, bool focusIn);
346 * @copydoc Dali::Accessibility::Bridge::GetBusName()
348 const std::string& GetBusName() const override;
351 * @copydoc Dali::Accessibility::Bridge::AddTopLevelWindow()
353 void AddTopLevelWindow(Dali::Accessibility::Accessible* windowAccessible) override;
356 * @copydoc Dali::Accessibility::Bridge::RemoveTopLevelWindow()
358 void RemoveTopLevelWindow(Dali::Accessibility::Accessible* windowAccessible) override;
361 * @copydoc Dali::Accessibility::Bridge::RegisterDefaultLabel()
363 void RegisterDefaultLabel(Dali::Accessibility::Accessible* object) override;
366 * @copydoc Dali::Accessibility::Bridge::UnregisterDefaultLabel()
368 void UnregisterDefaultLabel(Dali::Accessibility::Accessible* object) override;
371 * @copydoc Dali::Accessibility::Bridge::GetDefaultLabel()
373 Dali::Accessibility::Accessible* GetDefaultLabel(Dali::Accessibility::Accessible* root) const override;
376 * @copydoc Dali::Accessibility::Bridge::GetApplication()
378 Dali::Accessibility::Accessible* GetApplication() const override
380 return &mApplication;
384 * @brief Adds function to dbus interface.
386 template<typename SELF, typename... RET, typename... ARGS>
387 void AddFunctionToInterface(
388 DBus::DBusInterfaceDescription& desc, const std::string& funcName, DBus::ValueOrError<RET...> (SELF::*funcPtr)(ARGS...))
390 if(auto self = dynamic_cast<SELF*>(this))
391 desc.addMethod<DBus::ValueOrError<RET...>(ARGS...)>(
393 [=](ARGS... args) -> DBus::ValueOrError<RET...> {
396 return (self->*funcPtr)(std::move(args)...);
398 catch(std::domain_error& e)
400 return DBus::Error{e.what()};
406 * @brief Adds 'Get' property to dbus interface.
408 template<typename T, typename SELF>
409 void AddGetPropertyToInterface(DBus::DBusInterfaceDescription& desc,
410 const std::string& funcName,
411 T (SELF::*funcPtr)())
413 if(auto self = dynamic_cast<SELF*>(this))
414 desc.addProperty<T>(funcName,
415 [=]() -> DBus::ValueOrError<T> {
418 return (self->*funcPtr)();
420 catch(std::domain_error& e)
422 return DBus::Error{e.what()};
429 * @brief Adds 'Set' property to dbus interface.
431 template<typename T, typename SELF>
432 void AddSetPropertyToInterface(DBus::DBusInterfaceDescription& desc,
433 const std::string& funcName,
434 void (SELF::*funcPtr)(T))
436 if(auto self = dynamic_cast<SELF*>(this))
437 desc.addProperty<T>(funcName, {}, [=](T t) -> DBus::ValueOrError<void> {
440 (self->*funcPtr)(std::move(t));
443 catch(std::domain_error& e)
445 return DBus::Error{e.what()};
451 * @brief Adds 'Set' and 'Get' properties to dbus interface.
453 template<typename T, typename T1, typename SELF>
454 void AddGetSetPropertyToInterface(DBus::DBusInterfaceDescription& desc,
455 const std::string& funcName,
456 T1 (SELF::*funcPtrGet)(),
457 DBus::ValueOrError<void> (SELF::*funcPtrSet)(T))
459 if(auto self = dynamic_cast<SELF*>(this))
462 [=]() -> DBus::ValueOrError<T> {
465 return (self->*funcPtrGet)();
467 catch(std::domain_error& e)
469 return DBus::Error{e.what()};
472 [=](T t) -> DBus::ValueOrError<void> {
475 (self->*funcPtrSet)(std::move(t));
478 catch(std::domain_error& e)
480 return DBus::Error{e.what()};
486 * @brief Adds 'Get' and 'Set' properties to dbus interface.
488 template<typename T, typename T1, typename SELF>
489 void AddGetSetPropertyToInterface(DBus::DBusInterfaceDescription& desc,
490 const std::string& funcName,
491 T1 (SELF::*funcPtrGet)(),
492 void (SELF::*funcPtrSet)(T))
494 if(auto self = dynamic_cast<SELF*>(this))
497 [=]() -> DBus::ValueOrError<T> {
500 return (self->*funcPtrGet)();
502 catch(std::domain_error& e)
504 return DBus::Error{e.what()};
507 [=](T t) -> DBus::ValueOrError<void> {
510 (self->*funcPtrSet)(std::move(t));
513 catch(std::domain_error& e)
515 return DBus::Error{e.what()};
521 * @brief Gets the string of the path excluding the specified prefix.
523 * @param path The path to get
524 * @return The string stripped of the specific prefix
526 static std::string StripPrefix(const std::string& path);
529 * @brief Finds the Accessible object according to the path.
531 * @param[in] path The path for Accessible object
532 * @return The Accessible object corresponding to the path
534 Dali::Accessibility::Accessible* Find(const std::string& path) const;
537 * @brief Finds the Accessible object with the given address.
539 * @param[in] ptr The unique Address of the object
540 * @return The Accessible object corresponding to the path
542 Dali::Accessibility::Accessible* Find(const Dali::Accessibility::Address& ptr) const;
545 * @brief Returns the target object of the currently executed DBus method call.
547 * @return The Accessible object
548 * @note When a DBus method is called on some object, this target object (`currentObject`) is temporarily saved by the bridge,
549 * because DBus handles the invocation target separately from the method arguments.
550 * We then use the saved object inside the 'glue' method (e.g. BridgeValue::GetMinimum)
551 * to call the equivalent method on the respective C++ object (this could be ScrollBar::AccessibleImpl::GetMinimum in the example given).
553 Dali::Accessibility::Accessible* FindCurrentObject() const;
556 * @brief Returns the target object of the currently executed DBus method call.
558 * This method tries to downcast the return value of FindCurrentObject() to the requested type,
559 * issuing an error reply to the DBus caller if the requested type is not implemented. Whether
560 * a given type is implemented is decided based on the return value of Accessible::GetInterfaces()
561 * for the current object.
563 * @tparam I The requested AT-SPI interface
564 * @return The Accessible object (cast to a more derived type)
566 * @see FindCurrentObject()
567 * @see Dali::Accessibility::AtspiInterface
568 * @see Dali::Accessibility::AtspiInterfaceType
569 * @see Dali::Accessibility::Accessible::GetInterfaces()
571 template<Dali::Accessibility::AtspiInterface I>
572 auto* FindCurrentObjectWithInterface() const
574 using Type = Dali::Accessibility::AtspiInterfaceType<I>;
577 auto* currentObject = FindCurrentObject();
578 DALI_ASSERT_DEBUG(currentObject); // FindCurrentObject() throws domain_error
580 if(!(result = Dali::Accessibility::Accessible::DownCast<I>(currentObject)))
584 s << "Object " << currentObject->GetAddress().ToString();
585 s << " does not implement ";
586 s << Dali::Accessibility::Accessible::GetInterfaceName(I);
588 throw std::domain_error{s.str()};
595 * @copydoc Dali::Accessibility::Bridge::FindByPath()
597 Dali::Accessibility::Accessible* FindByPath(const std::string& name) const override;
600 * @copydoc Dali::Accessibility::Bridge::SetApplicationName()
602 void SetApplicationName(std::string name) override
604 mApplication.mName = std::move(name);
608 * @copydoc Dali::Accessibility::Bridge::SetToolkitName()
610 void SetToolkitName(std::string_view toolkitName) override
612 mApplication.mToolkitName = std::string{toolkitName};
616 // We use a weak handle in order not to keep a window alive forever if someone forgets to UnregisterDefaultLabel()
617 using DefaultLabelType = std::pair<Dali::WeakHandle<Dali::Window>, Dali::Accessibility::Accessible*>;
618 using DefaultLabelsType = std::list<DefaultLabelType>;
620 mutable ApplicationAccessible mApplication;
621 DefaultLabelsType mDefaultLabels;
622 bool mIsScreenReaderSuppressed = false;
627 * @param[in] id An ID (integer value)
632 * @brief Gets the ID.
633 * @return The ID to be set
638 * @brief Update registered events.
640 void UpdateRegisteredEvents();
642 using CacheElementType = std::tuple<
643 Dali::Accessibility::Address,
644 Dali::Accessibility::Address,
645 Dali::Accessibility::Address,
646 std::vector<Dali::Accessibility::Address>,
647 std::vector<std::string>,
649 Dali::Accessibility::Role,
651 std::array<uint32_t, 2>>;
654 * @brief Gets Items // NEED TO UPDATE!
658 DBus::ValueOrError<std::vector<CacheElementType>> GetItems();
661 * @brief Creates CacheElement.
663 * CreateCacheElement method works for GetItems which is a part of ATSPI protocol.
664 * ATSPI client library (libatspi from at-spi2-core) depending on cacheing policy configuration uses GetItems
665 * to pre-load entire accessible tree from application to its own cache in single dbus call.
666 * Otherwise the particular nodes in a tree are cached lazily when client library tries to access them.
667 * @param item Accessible to get information
668 * @return The elements to be cached
670 CacheElementType CreateCacheElement(Dali::Accessibility::Accessible* item);
673 * @brief Removes expired elements from the default label collection.
675 void CompressDefaultLabels();
678 * @brief Gets the window to which this accessible belongs (or an empty handle).
680 * @param accessible The accessible
683 static Dali::WeakHandle<Dali::Window> GetWindow(Dali::Accessibility::Accessible* accessible);
687 virtual ~BridgeBase();
690 * @copydoc Dali::Accessibility::Bridge::ForceUp()
692 ForceUpResult ForceUp() override;
695 * @copydoc Dali::Accessibility::Bridge::ForceDown()
697 void ForceDown() override;
699 DBus::DBusServer mDbusServer;
700 DBusWrapper::ConnectionPtr mConnectionPtr;
702 DBus::DBusClient mRegistry;
703 bool IsBoundsChangedEventAllowed{false};
706 #endif // DALI_INTERNAL_ACCESSIBILITY_BRIDGE_BASE_H