1 #ifndef DALI_INTERNAL_ACCESSIBILITY_BRIDGE_ACCESSIBLE_H
2 #define DALI_INTERNAL_ACCESSIBILITY_BRIDGE_ACCESSIBLE_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.
24 #include <unordered_map>
28 #include <dali/devel-api/atspi-interfaces/accessible.h>
29 #include <dali/devel-api/atspi-interfaces/component.h>
30 #include <dali/internal/accessibility/bridge/bridge-base.h>
33 * @brief The BridgeAccessible class is to correspond with Dali::Accessibility::Accessible.
35 class BridgeAccessible : public virtual BridgeBase
44 * @brief Registers Accessible functions to dbus interfaces.
46 void RegisterInterfaces();
49 * @brief Returns the Accessible object of the currently executed DBus method call.
51 * @return The Accessible object
53 Dali::Accessibility::Accessible* FindSelf() const;
57 * @brief Enumeration for NeighborSearchMode.
59 enum class NeighborSearchMode
61 NORMAL = 0, ///< Normal
62 RECURSE_FROM_ROOT = 1, ///< Recurse from root
63 CONTINUE_AFTER_FAILED_RECURSION = 2, ///< Continue after failed recursion
64 RECURSE_TO_OUTSIDE = 3, ///< Recurse to outside
67 using ReadingMaterialType = DBus::ValueOrError<
68 std::unordered_map<std::string, std::string>, // attributes
70 std::string, // labeledByName
71 std::string, // textIfceName
73 Dali::Accessibility::States,
74 std::string, // localized name
75 int32_t, // child count
76 double, // current value
77 double, // minimum increment
78 double, // maximum value
79 double, // minimum value
80 std::string, // description
81 int32_t, // index in parent
82 bool, // isSelectedInParent
83 bool, // hasCheckBoxChild
84 int32_t, // listChildrenCount
85 int32_t, // firstSelectedChildIndex
86 Dali::Accessibility::Accessible*, // parent
87 Dali::Accessibility::States, // parentStateSet
88 int32_t, // parentChildCount
89 uint32_t, // parentRole
90 int32_t, // selectedChildCount,
91 Dali::Accessibility::Accessible* // describedByObject
94 using Relation = std::tuple<uint32_t, std::vector<Dali::Accessibility::Address>>;
97 * @copydoc Dali::Accessibility::Accessible::GetChildCount()
102 * @copydoc Dali::Accessibility::Accessible::GetChildAtIndex()
104 DBus::ValueOrError<Dali::Accessibility::Accessible*> GetChildAtIndex(int index);
107 * @copydoc Dali::Accessibility::Accessible::GetParent()
109 Dali::Accessibility::Accessible* GetParent();
112 * @copydoc Dali::Accessibility::Accessible::GetChildren()
114 DBus::ValueOrError<std::vector<Dali::Accessibility::Accessible*>> GetChildren();
117 * @copydoc Dali::Accessibility::Accessible::GetName()
119 std::string GetName();
122 * @copydoc Dali::Accessibility::Accessible::GetDescription()
124 std::string GetDescription();
127 * @copydoc Dali::Accessibility::Accessible::GetRole()
129 DBus::ValueOrError<uint32_t> GetRole();
132 * @copydoc Dali::Accessibility::Accessible::GetRoleName()
134 DBus::ValueOrError<std::string> GetRoleName();
137 * @copydoc Dali::Accessibility::Accessible::GetLocalizedRoleName()
139 DBus::ValueOrError<std::string> GetLocalizedRoleName();
142 * @copydoc Dali::Accessibility::Accessible::GetIndexInParent()
144 DBus::ValueOrError<int32_t> GetIndexInParent();
147 * @copydoc Dali::Accessibility::Accessible::GetStates()
149 DBus::ValueOrError<std::array<uint32_t, 2>> GetStates();
152 * @copydoc Dali::Accessibility::Accessible::GetAttributes()
154 DBus::ValueOrError<std::unordered_map<std::string, std::string>> GetAttributes();
157 * @copydoc Dali::Accessibility::Accessible::GetInterfacesAsStrings()
159 DBus::ValueOrError<std::vector<std::string>> GetInterfacesAsStrings();
162 * @brief Gets Accessible object on which surface lies the point with given coordinates.
164 * @param[in] x X coordinate of a point
165 * @param[in] y Y coordinate of a point
166 * @param[in] coordinateType The coordinate type
167 * @return The array containing the Accessible object, recursive status, and deputy Accessible
169 DBus::ValueOrError<Dali::Accessibility::Accessible*, uint8_t, Dali::Accessibility::Accessible*> GetNavigableAtPoint(int32_t x, int32_t y, uint32_t coordinateType);
172 * @brief Gets Accessible object that, dependently to the given direction parameter,
173 * stands in navigation order immediately before/after the Accessible object being a target of this dbus call.
175 * The 'direction' parameter denotes if the neighbor object search is done forward or backward in UI elements navigation order.
176 * @param[in] rootPath The path of root Accessible object
177 * @param[in] direction 1 is forward, 0 is backward
178 * @param[in] searchMode BridgeAccessible::NeighborSearchMode enum
179 * @return The array containing the neighbor Accessible object and recursive status
181 DBus::ValueOrError<Dali::Accessibility::Accessible*, uint8_t> GetNeighbor(std::string rootPath, int32_t direction, int32_t searchMode);
184 * @brief Gets the default label information.
186 * The "Default label" is a text that could be read by screen-reader immediately
187 * after the navigation context has changed (window activates, popup shows up, tab changes) and before first UI element is highlighted.
188 * @return The array containing the Accessible object being a source of default label text, its role, and its attributes
189 * @note This is a Tizen only feature not present in upstream ATSPI.
190 * Feature can be enabled/disabled for particular context root object by setting value of its accessibility attribute "default_label".
192 DBus::ValueOrError<Dali::Accessibility::Accessible*, uint32_t, std::unordered_map<std::string, std::string>> GetDefaultLabelInfo();
195 * @brief Gets Reading material information of the self object.
196 * @return Reading material information
198 ReadingMaterialType GetReadingMaterial();
201 * @copydoc Dali::Accessibility::Accessible::DoGesture()
203 DBus::ValueOrError<bool> DoGesture(Dali::Accessibility::Gesture type, int32_t startPositionX, int32_t startPositionY, int32_t endPositionX, int32_t endPositionY, Dali::Accessibility::GestureState state, uint32_t eventTime);
206 * @copydoc Dali::Accessibility::Accessible::GetRelationSet()
208 DBus::ValueOrError<std::vector<Relation>> GetRelationSet();
212 * @brief Calculates Neighbor candidate object in root node.
214 * The DFS algorithm in the method is implemented in iterative way.
215 * @param root The accessible root object
216 * @param start The start node
217 * @param forward If forward is 1, then it navigates forward, otherwise backward.
218 * @param searchMode BridgeAccessible::NeighborSearchMode enum
219 * @return The neighbor Accessible object
221 Dali::Accessibility::Accessible* CalculateNeighbor(Dali::Accessibility::Accessible* root, Dali::Accessibility::Accessible* start, unsigned char forward, NeighborSearchMode searchMode);
224 * @brief Gets valid children accessible.
226 * @param[in] children Children accessible objects
227 * @param start The start node
228 * @return The valid children
230 std::vector<Dali::Accessibility::Component*> GetValidChildren(const std::vector<Dali::Accessibility::Accessible*>& children, Dali::Accessibility::Accessible* start);
233 * @brief Sorts children accessible based on the coordinates from top-left to bottom-right.
235 * @param[in,out] children Children accessible objects
236 * @return The sorted children
238 void SortChildrenFromTopLeft(std::vector<Dali::Accessibility::Component*>& children);
241 * @brief Gets the currently highlighted accessible.
243 * @return The highlighted accessible
244 * @remarks This is an experimental feature and might not be supported now.
246 Dali::Accessibility::Accessible* GetCurrentlyHighlighted();
249 * @brief Finds the non defunct sibling of the node.
251 * @param[out] areAllChildrenVisited True if all children are visited
252 * @param[in] node The accessible object to find its non defunct sibling
253 * @param[in] start The start node
254 * @param[in] root The root node
255 * @param[in] forward If forward is 1, then it navigates forward, otherwise backward.
256 * @return The non defunct sibling accessible
258 * @note This function performs a Depth-First Search (DFS) on all children within the node.
260 Dali::Accessibility::Accessible* FindNonDefunctSibling(bool& areAllChildrenVisited, Dali::Accessibility::Accessible* node, Dali::Accessibility::Accessible* start, Dali::Accessibility::Accessible* root, unsigned char forward);
263 * @brief Gets the next non defunct sibling.
265 * @param obj The accessible object to find its non defunct sibling
266 * @param start The start node
267 * @param forward If forward is 1, then it navigates forward, otherwise backward.
268 * @return The non defunct sibling accessible
270 Dali::Accessibility::Accessible* GetNextNonDefunctSibling(Dali::Accessibility::Accessible* obj, Dali::Accessibility::Accessible* start, unsigned char forward);
273 * @brief Gets Component object in relation.
274 * @param obj The accessible object to find component in its address
275 * @param relationType Accessibility::RelationType enum
276 * @return The Component object
278 Dali::Accessibility::Component* GetObjectInRelation(Dali::Accessibility::Accessible* obj, Dali::Accessibility::RelationType relationType);
281 * @brief Calculates and gets Component object that can be navigable at given coordinates.
283 * This method calculates which Component should be addressed if user hits certain point in a screen.
284 * @param root The root node
285 * @param point The coordinate of a point
286 * @param type This type says if the coordinates of a point refer to the device screen or current window.
287 * @param maxRecursionDepth The maximum recursion depth count
288 * @return The Component object
290 Dali::Accessibility::Component* CalculateNavigableAccessibleAtPoint(Dali::Accessibility::Accessible* root, Dali::Accessibility::Point point, Dali::Accessibility::CoordinateType type, unsigned int maxRecursionDepth);
293 #endif // DALI_INTERNAL_ACCESSIBILITY_BRIDGE_ACCESSIBLE_H