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flutter::TestAccessibilityBridge Class Reference

`#include <test_accessibility_bridge.h>`

Inheritance diagram for flutter::TestAccessibilityBridge:

## Public Member Functions
| TestAccessibilityBridge ()=default
void | DispatchAccessibilityAction (AccessibilityNodeId target, FlutterSemanticsAction action, fml::MallocMapping data) override
| Dispatch accessibility action back to the Flutter framework. These actions are generated in the native accessibility system when users interact with the assistive technologies. For example, a FlutterSemanticsAction::kFlutterSemanticsActionTap is fired when user click or touch the screen. More...
Public Member Functions inherited from flutter::AccessibilityBridge
| AccessibilityBridge ()
| Creates a new instance of a accessibility bridge. More...
virtual | ~AccessibilityBridge ()
void | AddFlutterSemanticsNodeUpdate (const FlutterSemanticsNode2 &node)
| Adds a semantics node update to the pending semantics update. Calling this method alone will NOT update the semantics tree. To flush the pending updates, call the CommitUpdates(). More...
void | AddFlutterSemanticsCustomActionUpdate (const FlutterSemanticsCustomAction2 &action)
| Adds a custom semantics action update to the pending semantics update. Calling this method alone will NOT update the semantics tree. To flush the pending updates, call the CommitUpdates(). More...
void | CommitUpdates ()
| Flushes the pending updates and applies them to this accessibility bridge. Calling this with no pending updates does nothing, and callers should call this method at the end of an atomic batch to avoid leaving the tree in a unstable state. For example if a node reparents from A to B, callers should only call this method when both removal from A and addition to B are in the pending updates. More...
std::weak_ptr< FlutterPlatformNodeDelegate > | GetFlutterPlatformNodeDelegateFromID (AccessibilityNodeId id) const
| Get the flutter platform node delegate with the given id from this accessibility bridge. Returns expired weak_ptr if the delegate associated with the id does not exist or has been removed from the accessibility tree. More...
const ui::AXTreeData & | GetAXTreeData () const
| Get the ax tree data from this accessibility bridge. The tree data contains information such as the id of the node that has the keyboard focus or the text selection range. More...
const std::vector< ui::AXEventGenerator::TargetedEvent > | GetPendingEvents () const
| Gets all pending accessibility events generated during semantics updates. This is useful when deciding how to handle events in AccessibilityBridgeDelegate::OnAccessibilityEvent in case one may decide to handle an event differently based on all pending events. More...
ui::AXNode * | GetNodeFromTree (const ui::AXTreeID tree_id, const ui::AXNode::AXID node_id) const override
ui::AXNode * | GetNodeFromTree (const ui::AXNode::AXID node_id) const override
ui::AXTreeID | GetTreeID () const override
ui::AXTreeID | GetParentTreeID () const override
ui::AXNode * | GetRootAsAXNode () const override
ui::AXNode * | GetParentNodeFromParentTreeAsAXNode () const override
ui::AXTree * | GetTree () const override
ui::AXPlatformNode * | GetPlatformNodeFromTree (const ui::AXNode::AXID node_id) const override
ui::AXPlatformNode * | GetPlatformNodeFromTree (const ui::AXNode &node) const override
ui::AXPlatformNodeDelegate * | RootDelegate () const override
Public Member Functions inherited from flutter::FlutterPlatformNodeDelegate::OwnerBridge
virtual | ~OwnerBridge ()=default

## Public Attributes
std::vector< ui::AXEventGenerator::Event > | accessibility_events
std::vector< FlutterSemanticsAction > | performed_actions

## Protected Member Functions
void | OnAccessibilityEvent (ui::AXEventGenerator::TargetedEvent targeted_event) override
| Handle accessibility events generated due to accessibility tree changes. These events are needed to be sent to native accessibility system. See ui::AXEventGenerator::Event for possible events. More...
std::shared_ptr< FlutterPlatformNodeDelegate > | CreateFlutterPlatformNodeDelegate () override
| Creates a platform specific FlutterPlatformNodeDelegate. Ownership passes to the caller. This method will be called whenever a new AXNode is created in AXTree. Each platform needs to implement this method in order to inject its subclass into the accessibility bridge. More...

## Detailed Description

Definition at line 12 of file test_accessibility_bridge.h.

## Constructor & Destructor Documentation

## ◆ TestAccessibilityBridge()

flutter::TestAccessibilityBridge::TestAccessibilityBridge | ( |  | ) |
| default

## Member Function Documentation

## ◆ CreateFlutterPlatformNodeDelegate()

std::shared_ptr< FlutterPlatformNodeDelegate > flutter::TestAccessibilityBridge::CreateFlutterPlatformNodeDelegate | ( |  | ) |
| override protected virtual

Creates a platform specific FlutterPlatformNodeDelegate. Ownership passes to the caller. This method will be called whenever a new AXNode is created in AXTree. Each platform needs to implement this method in order to inject its subclass into the accessibility bridge.

Implements flutter::AccessibilityBridge.

Definition at line 10 of file test_accessibility_bridge.cc.

10 {
11 return std::make_unique<FlutterPlatformNodeDelegate>();
12 };

## ◆ DispatchAccessibilityAction()

void flutter::TestAccessibilityBridge::DispatchAccessibilityAction | ( | AccessibilityNodeId | target,
|  | FlutterSemanticsAction | action,
|  | fml::MallocMapping | data
| ) |  |
| override virtual

Dispatch accessibility action back to the Flutter framework. These actions are generated in the native accessibility system when users interact with the assistive technologies. For example, a FlutterSemanticsAction::kFlutterSemanticsActionTap is fired when user click or touch the screen.

Parameters

  [in] | target | The semantics node id of the action target.
  [in] | action | The generated flutter semantics action.
  [in] | data | Additional data associated with the action.

Implements flutter::FlutterPlatformNodeDelegate::OwnerBridge.

Definition at line 19 of file test_accessibility_bridge.cc.

22 {
23 performed_actions.push_back(action);
24 }
flutter::TestAccessibilityBridge::performed_actions
std::vector< FlutterSemanticsAction > performed_actions
Definition: test_accessibility_bridge.h:21
action
FlutterSemanticsAction action
Definition: fl_accessible_node.cc:86

References action, and performed_actions.

## ◆ OnAccessibilityEvent()

void flutter::TestAccessibilityBridge::OnAccessibilityEvent | ( | ui::AXEventGenerator::TargetedEvent | targeted_event | ) |
| override protected virtual

Handle accessibility events generated due to accessibility tree changes. These events are needed to be sent to native accessibility system. See ui::AXEventGenerator::Event for possible events.

Parameters

  [in] | targeted_event | The object that contains both the generated event and the event target.

Implements flutter::AccessibilityBridge.

Definition at line 14 of file test_accessibility_bridge.cc.

15 {
16 accessibility_events.push_back(targeted_event.event_params.event);
17 }
flutter::TestAccessibilityBridge::accessibility_events
std::vector< ui::AXEventGenerator::Event > accessibility_events
Definition: test_accessibility_bridge.h:20

References accessibility_events.

## Member Data Documentation

## ◆ accessibility_events

std::vector<ui::AXEventGenerator::Event> flutter::TestAccessibilityBridge::accessibility_events

Definition at line 20 of file test_accessibility_bridge.h.

Referenced by OnAccessibilityEvent().

## ◆ performed_actions

std::vector<FlutterSemanticsAction> flutter::TestAccessibilityBridge::performed_actions

Definition at line 21 of file test_accessibility_bridge.h.

Referenced by DispatchAccessibilityAction().

The documentation for this class was generated from the following files:

- shell/platform/common/test_accessibility_bridge.h
- shell/platform/common/test_accessibility_bridge.cc