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 "bridge-base.h"
31 * @brief The BridgeAccessible class is to correspond with Dali::Accessibility::Accessible.
33 class BridgeAccessible : public virtual BridgeBase
42 * @brief Registers Accessible functions to dbus interfaces.
44 void RegisterInterfaces();
48 * @brief Enumeration for NeighborSearchMode.
50 enum class NeighborSearchMode
52 NORMAL = 0, ///< Normal
53 RECURSE_FROM_ROOT = 1, ///< Recurse from root
54 CONTINUE_AFTER_FAILED_RECURSION = 2, ///< Continue after failed recursion
55 RECURSE_TO_OUTSIDE = 3, ///< Recurse to outside
58 using ReadingMaterialType = DBus::ValueOrError<
59 std::unordered_map<std::string, std::string>, // attributes
61 std::string, // labeledByName
62 std::string, // textIfceName
64 Dali::Accessibility::States,
65 std::string, // localized name
66 int32_t, // child count
67 double, // current value
68 double, // minimum increment
69 double, // maximum value
70 double, // minimum value
71 std::string, // description
72 int32_t, // index in parent
73 bool, // isSelectedInParent
74 bool, // hasCheckBoxChild
75 int32_t, // listChildrenCount
76 int32_t, // firstSelectedChildIndex
77 Dali::Accessibility::Accessible*, // parent
78 Dali::Accessibility::States, // parentStateSet
79 int32_t, // parentChildCount
80 uint32_t, // parentRole
81 int32_t, // selectedChildCount,
82 Dali::Accessibility::Accessible* // describedByObject
85 using Relation = std::tuple<uint32_t, std::vector<Dali::Accessibility::Address>>;
88 * @copydoc Dali::Accessibility::Accessible::GetChildCount()
93 * @copydoc Dali::Accessibility::Accessible::GetChildAtIndex()
95 DBus::ValueOrError<Dali::Accessibility::Accessible*> GetChildAtIndex(int index);
98 * @copydoc Dali::Accessibility::Accessible::GetParent()
100 Dali::Accessibility::Accessible* GetParent();
103 * @copydoc Dali::Accessibility::Accessible::GetChildren()
105 DBus::ValueOrError<std::vector<Dali::Accessibility::Accessible*>> GetChildren();
108 * @copydoc Dali::Accessibility::Accessible::GetName()
110 std::string GetName();
113 * @copydoc Dali::Accessibility::Accessible::GetDescription()
115 std::string GetDescription();
118 * @copydoc Dali::Accessibility::Accessible::GetRole()
120 DBus::ValueOrError<uint32_t> GetRole();
123 * @copydoc Dali::Accessibility::Accessible::GetRoleName()
125 DBus::ValueOrError<std::string> GetRoleName();
128 * @copydoc Dali::Accessibility::Accessible::GetLocalizedRoleName()
130 DBus::ValueOrError<std::string> GetLocalizedRoleName();
133 * @copydoc Dali::Accessibility::Accessible::GetIndexInParent()
135 DBus::ValueOrError<int32_t> GetIndexInParent();
138 * @copydoc Dali::Accessibility::Accessible::GetStates()
140 DBus::ValueOrError<std::array<uint32_t, 2>> GetStates();
143 * @copydoc Dali::Accessibility::Accessible::GetAttributes()
145 DBus::ValueOrError<std::unordered_map<std::string, std::string>> GetAttributes();
148 * @copydoc Dali::Accessibility::Accessible::GetInterfaces()
150 DBus::ValueOrError<std::vector<std::string>> GetInterfaces();
153 * @brief Gets Accessible object on which surface lies the point with given coordinates.
155 * @param[in] x X coordinate of a point
156 * @param[in] y Y coordinate of a point
157 * @param[in] coordinateType The coordinate type
158 * @return The array containing the Accessible object, recursive status, and deputy Accessible
160 DBus::ValueOrError<Dali::Accessibility::Accessible*, uint8_t, Dali::Accessibility::Accessible*> GetNavigableAtPoint(int32_t x, int32_t y, uint32_t coordinateType);
163 * @brief Gets Accessible object that, dependently to the given direction parameter,
164 * stands in navigation order immediately before/after the Accessible object being a target of this dbus call.
166 * The 'direction' parameter denotes if the neighbor object search is done forward or backward in UI elements navigation order.
167 * @param[in] rootPath The path of root Accessible object
168 * @param[in] direction 1 is forward, 0 is backward
169 * @param[in] searchMode BridgeAccessible::NeighborSearchMode enum
170 * @return The array containing the neighbor Accessible object and recursive status
172 DBus::ValueOrError<Dali::Accessibility::Accessible*, uint8_t> GetNeighbor(std::string rootPath, int32_t direction, int32_t searchMode);
175 * @brief Gets the default label information.
177 * The "Default label" is a text that could be read by screen-reader immediately
178 * after the navigation context has changed (window activates, popup shows up, tab changes) and before first UI element is highlighted.
179 * @return The array containing the Accessible object being a source of default label text, its role, and its attributes
180 * @note This is a Tizen only feature not present in upstream ATSPI.
181 * Feature can be enabled/disabled for particular context root object by setting value of its accessibility attribute "default_label".
183 DBus::ValueOrError<Dali::Accessibility::Accessible*, uint32_t, std::unordered_map<std::string, std::string>> GetDefaultLabelInfo();
186 * @brief Gets Reading material information of the self object.
187 * @return Reading material information
189 ReadingMaterialType GetReadingMaterial();
192 * @copydoc Dali::Accessibility::Bridge::SuppressScreenReader()
194 void SuppressScreenReader(bool) override;
197 * @copydoc Dali::Accessibility::Accessible::DoGesture()
199 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);
202 * @copydoc Dali::Accessibility::Accessible::GetRelationSet()
204 DBus::ValueOrError<std::vector<Relation>> GetRelationSet();
208 * @brief Calculates Neighbor candidate object in root node.
210 * The DFS algorithm in the method is implemented in iterative way.
211 * @param root The accessible root object
212 * @param start The start node
213 * @param forward If forward is 1, then it navigates forward, otherwise backward.
214 * @param searchMode BridgeAccessible::NeighborSearchMode enum
215 * @return The neighbor Accessible object
217 Dali::Accessibility::Accessible* CalculateNeighbor(Dali::Accessibility::Accessible* root, Dali::Accessibility::Accessible* start, unsigned char forward, NeighborSearchMode searchMode);
220 * @brief Gets valid children accessible.
222 * @param[in] children Children accessible objects
223 * @param start The start node
224 * @return The valid children
226 std::vector<Dali::Accessibility::Component*> GetValidChildren(const std::vector<Dali::Accessibility::Accessible*>& children, Dali::Accessibility::Accessible* start);
229 * @brief Sorts children accessible based on the coordinates from top-left to bottom-right.
231 * @param[in,out] children Children accessible objects
232 * @return The sorted children
234 void SortChildrenFromTopLeft(std::vector<Dali::Accessibility::Component*>& children);
237 * @brief Gets the currently highlighted accessible.
239 * @return The highlighted accessible
240 * @remarks This is an experimental feature and might not be supported now.
242 Dali::Accessibility::Accessible* GetCurrentlyHighlighted();
245 * @brief Finds the non defunct sibling of the node.
247 * @param[out] areAllChildrenVisited True if all children are visited
248 * @param[in] node The accessible object to find its non defunct sibling
249 * @param[in] start The start node
250 * @param[in] root The root node
251 * @param[in] forward If forward is 1, then it navigates forward, otherwise backward.
252 * @return The non defunct sibling accessible
254 * @note This function performs a Depth-First Search (DFS) on all children within the node.
256 Dali::Accessibility::Accessible* FindNonDefunctSibling(bool& areAllChildrenVisited, Dali::Accessibility::Accessible* node, Dali::Accessibility::Accessible* start, Dali::Accessibility::Accessible* root, unsigned char forward);
259 * @brief Gets the next non defunct sibling.
261 * @param obj The accessible object to find its non defunct sibling
262 * @param start The start node
263 * @param forward If forward is 1, then it navigates forward, otherwise backward.
264 * @return The non defunct sibling accessible
266 Dali::Accessibility::Accessible* GetNextNonDefunctSibling(Dali::Accessibility::Accessible* obj, Dali::Accessibility::Accessible* start, unsigned char forward);
269 * @brief Gets Component object in relation.
270 * @param obj The accessible object to find component in its address
271 * @param relationType Accessibility::RelationType enum
272 * @return The Component object
274 Dali::Accessibility::Component* GetObjectInRelation(Dali::Accessibility::Accessible* obj, Dali::Accessibility::RelationType relationType);
277 * @brief Calculates and gets Component object that can be navigable at given coordinates.
279 * This method calculates which Component should be addressed if user hits certain point in a screen.
280 * @param root The root node
281 * @param point The coordinate of a point
282 * @param type This type says if the coordinates of a point refer to the device screen or current window.
283 * @param maxRecursionDepth The maximum recursion depth count
284 * @return The Component object
286 Dali::Accessibility::Component* CalculateNavigableAccessibleAtPoint(Dali::Accessibility::Accessible* root, Dali::Accessibility::Point point, Dali::Accessibility::CoordinateType type, unsigned int maxRecursionDepth);
289 bool mIsScreenReaderSuppressed = false;
292 #endif // DALI_INTERNAL_ACCESSIBILITY_BRIDGE_ACCESSIBLE_H