| // Copyright 2013 The Flutter Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "flutter/shell/platform/windows/accessibility_bridge_windows.h" |
| |
| #include "flutter/fml/logging.h" |
| #include "flutter/shell/platform/windows/flutter_platform_node_delegate_windows.h" |
| #include "flutter/third_party/accessibility/ax/platform/ax_platform_node_delegate_base.h" |
| |
| namespace flutter { |
| |
| AccessibilityBridgeWindows::AccessibilityBridgeWindows(FlutterWindowsView* view) |
| : view_(view) { |
| FML_DCHECK(view_); |
| } |
| |
| void AccessibilityBridgeWindows::OnAccessibilityEvent( |
| ui::AXEventGenerator::TargetedEvent targeted_event) { |
| ui::AXNode* ax_node = targeted_event.node; |
| ui::AXEventGenerator::Event event_type = targeted_event.event_params.event; |
| |
| auto node_delegate = |
| GetFlutterPlatformNodeDelegateFromID(ax_node->id()).lock(); |
| FML_DCHECK(node_delegate) |
| << "No FlutterPlatformNodeDelegate found for node ID " << ax_node->id(); |
| std::shared_ptr<FlutterPlatformNodeDelegateWindows> win_delegate = |
| std::static_pointer_cast<FlutterPlatformNodeDelegateWindows>( |
| node_delegate); |
| |
| switch (event_type) { |
| case ui::AXEventGenerator::Event::ALERT: |
| DispatchWinAccessibilityEvent(win_delegate, ax::mojom::Event::kAlert); |
| break; |
| case ui::AXEventGenerator::Event::CHECKED_STATE_CHANGED: |
| DispatchWinAccessibilityEvent(win_delegate, |
| ax::mojom::Event::kValueChanged); |
| break; |
| case ui::AXEventGenerator::Event::CHILDREN_CHANGED: |
| DispatchWinAccessibilityEvent(win_delegate, |
| ax::mojom::Event::kChildrenChanged); |
| break; |
| case ui::AXEventGenerator::Event::DOCUMENT_SELECTION_CHANGED: { |
| // An event indicating a change in document selection should be fired |
| // only for the focused node whose selection has changed. If a valid |
| // caret and selection exist in the app tree, they must both be within |
| // the focus node. |
| auto focus_delegate = GetFocusedNode().lock(); |
| if (focus_delegate) { |
| win_delegate = |
| std::static_pointer_cast<FlutterPlatformNodeDelegateWindows>( |
| focus_delegate); |
| } |
| DispatchWinAccessibilityEvent( |
| win_delegate, ax::mojom::Event::kDocumentSelectionChanged); |
| break; |
| } |
| case ui::AXEventGenerator::Event::FOCUS_CHANGED: |
| DispatchWinAccessibilityEvent(win_delegate, ax::mojom::Event::kFocus); |
| SetFocus(win_delegate); |
| break; |
| case ui::AXEventGenerator::Event::IGNORED_CHANGED: |
| if (ax_node->IsIgnored()) { |
| DispatchWinAccessibilityEvent(win_delegate, ax::mojom::Event::kHide); |
| } |
| break; |
| case ui::AXEventGenerator::Event::IMAGE_ANNOTATION_CHANGED: |
| DispatchWinAccessibilityEvent(win_delegate, |
| ax::mojom::Event::kTextChanged); |
| break; |
| case ui::AXEventGenerator::Event::LIVE_REGION_CHANGED: |
| DispatchWinAccessibilityEvent(win_delegate, |
| ax::mojom::Event::kLiveRegionChanged); |
| break; |
| case ui::AXEventGenerator::Event::NAME_CHANGED: |
| DispatchWinAccessibilityEvent(win_delegate, |
| ax::mojom::Event::kTextChanged); |
| break; |
| case ui::AXEventGenerator::Event::SCROLL_HORIZONTAL_POSITION_CHANGED: |
| DispatchWinAccessibilityEvent(win_delegate, |
| ax::mojom::Event::kScrollPositionChanged); |
| break; |
| case ui::AXEventGenerator::Event::SCROLL_VERTICAL_POSITION_CHANGED: |
| DispatchWinAccessibilityEvent(win_delegate, |
| ax::mojom::Event::kScrollPositionChanged); |
| break; |
| case ui::AXEventGenerator::Event::SELECTED_CHANGED: |
| DispatchWinAccessibilityEvent(win_delegate, |
| ax::mojom::Event::kValueChanged); |
| break; |
| case ui::AXEventGenerator::Event::SELECTED_CHILDREN_CHANGED: |
| DispatchWinAccessibilityEvent(win_delegate, |
| ax::mojom::Event::kSelectedChildrenChanged); |
| break; |
| case ui::AXEventGenerator::Event::SUBTREE_CREATED: |
| DispatchWinAccessibilityEvent(win_delegate, ax::mojom::Event::kShow); |
| break; |
| case ui::AXEventGenerator::Event::VALUE_CHANGED: |
| DispatchWinAccessibilityEvent(win_delegate, |
| ax::mojom::Event::kValueChanged); |
| break; |
| case ui::AXEventGenerator::Event::WIN_IACCESSIBLE_STATE_CHANGED: |
| DispatchWinAccessibilityEvent(win_delegate, |
| ax::mojom::Event::kStateChanged); |
| break; |
| case ui::AXEventGenerator::Event::ACCESS_KEY_CHANGED: |
| case ui::AXEventGenerator::Event::ACTIVE_DESCENDANT_CHANGED: |
| case ui::AXEventGenerator::Event::ATK_TEXT_OBJECT_ATTRIBUTE_CHANGED: |
| case ui::AXEventGenerator::Event::ATOMIC_CHANGED: |
| case ui::AXEventGenerator::Event::AUTO_COMPLETE_CHANGED: |
| case ui::AXEventGenerator::Event::BUSY_CHANGED: |
| case ui::AXEventGenerator::Event::CLASS_NAME_CHANGED: |
| case ui::AXEventGenerator::Event::COLLAPSED: |
| case ui::AXEventGenerator::Event::CONTROLS_CHANGED: |
| case ui::AXEventGenerator::Event::DESCRIBED_BY_CHANGED: |
| case ui::AXEventGenerator::Event::DESCRIPTION_CHANGED: |
| case ui::AXEventGenerator::Event::DOCUMENT_TITLE_CHANGED: |
| case ui::AXEventGenerator::Event::DROPEFFECT_CHANGED: |
| case ui::AXEventGenerator::Event::ENABLED_CHANGED: |
| case ui::AXEventGenerator::Event::EXPANDED: |
| case ui::AXEventGenerator::Event::FLOW_FROM_CHANGED: |
| case ui::AXEventGenerator::Event::FLOW_TO_CHANGED: |
| case ui::AXEventGenerator::Event::GRABBED_CHANGED: |
| case ui::AXEventGenerator::Event::HASPOPUP_CHANGED: |
| case ui::AXEventGenerator::Event::HIERARCHICAL_LEVEL_CHANGED: |
| case ui::AXEventGenerator::Event::INVALID_STATUS_CHANGED: |
| case ui::AXEventGenerator::Event::KEY_SHORTCUTS_CHANGED: |
| case ui::AXEventGenerator::Event::LABELED_BY_CHANGED: |
| case ui::AXEventGenerator::Event::LANGUAGE_CHANGED: |
| case ui::AXEventGenerator::Event::LAYOUT_INVALIDATED: |
| case ui::AXEventGenerator::Event::LIVE_REGION_CREATED: |
| case ui::AXEventGenerator::Event::LIVE_REGION_NODE_CHANGED: |
| case ui::AXEventGenerator::Event::LIVE_RELEVANT_CHANGED: |
| case ui::AXEventGenerator::Event::LIVE_STATUS_CHANGED: |
| case ui::AXEventGenerator::Event::LOAD_COMPLETE: |
| case ui::AXEventGenerator::Event::LOAD_START: |
| case ui::AXEventGenerator::Event::MENU_ITEM_SELECTED: |
| case ui::AXEventGenerator::Event::MULTILINE_STATE_CHANGED: |
| case ui::AXEventGenerator::Event::MULTISELECTABLE_STATE_CHANGED: |
| case ui::AXEventGenerator::Event::OBJECT_ATTRIBUTE_CHANGED: |
| case ui::AXEventGenerator::Event::OTHER_ATTRIBUTE_CHANGED: |
| case ui::AXEventGenerator::Event::PLACEHOLDER_CHANGED: |
| case ui::AXEventGenerator::Event::PORTAL_ACTIVATED: |
| case ui::AXEventGenerator::Event::POSITION_IN_SET_CHANGED: |
| case ui::AXEventGenerator::Event::READONLY_CHANGED: |
| case ui::AXEventGenerator::Event::RELATED_NODE_CHANGED: |
| case ui::AXEventGenerator::Event::REQUIRED_STATE_CHANGED: |
| case ui::AXEventGenerator::Event::ROLE_CHANGED: |
| case ui::AXEventGenerator::Event::ROW_COUNT_CHANGED: |
| case ui::AXEventGenerator::Event::SET_SIZE_CHANGED: |
| case ui::AXEventGenerator::Event::SORT_CHANGED: |
| case ui::AXEventGenerator::Event::STATE_CHANGED: |
| case ui::AXEventGenerator::Event::TEXT_ATTRIBUTE_CHANGED: |
| case ui::AXEventGenerator::Event::VALUE_MAX_CHANGED: |
| case ui::AXEventGenerator::Event::VALUE_MIN_CHANGED: |
| case ui::AXEventGenerator::Event::VALUE_STEP_CHANGED: |
| // Unhandled event type. |
| break; |
| } |
| } |
| |
| void AccessibilityBridgeWindows::DispatchAccessibilityAction( |
| AccessibilityNodeId target, |
| FlutterSemanticsAction action, |
| fml::MallocMapping data) { |
| view_->GetEngine()->DispatchSemanticsAction(target, action, std::move(data)); |
| } |
| |
| std::shared_ptr<FlutterPlatformNodeDelegate> |
| AccessibilityBridgeWindows::CreateFlutterPlatformNodeDelegate() { |
| return std::make_shared<FlutterPlatformNodeDelegateWindows>( |
| shared_from_this(), view_); |
| } |
| |
| void AccessibilityBridgeWindows::DispatchWinAccessibilityEvent( |
| std::shared_ptr<FlutterPlatformNodeDelegateWindows> node_delegate, |
| ax::mojom::Event event_type) { |
| node_delegate->DispatchWinAccessibilityEvent(event_type); |
| } |
| |
| void AccessibilityBridgeWindows::SetFocus( |
| std::shared_ptr<FlutterPlatformNodeDelegateWindows> node_delegate) { |
| node_delegate->SetFocus(); |
| } |
| |
| gfx::NativeViewAccessible |
| AccessibilityBridgeWindows::GetChildOfAXFragmentRoot() { |
| ui::AXPlatformNodeDelegate* root_delegate = RootDelegate(); |
| if (!root_delegate) { |
| return nullptr; |
| } |
| |
| return root_delegate->GetNativeViewAccessible(); |
| } |
| |
| gfx::NativeViewAccessible |
| AccessibilityBridgeWindows::GetParentOfAXFragmentRoot() { |
| return nullptr; |
| } |
| |
| bool AccessibilityBridgeWindows::IsAXFragmentRootAControlElement() { |
| return true; |
| } |
| |
| std::weak_ptr<FlutterPlatformNodeDelegate> |
| AccessibilityBridgeWindows::GetFocusedNode() { |
| ui::AXNode::AXID focus_id = GetAXTreeData().sel_focus_object_id; |
| return GetFlutterPlatformNodeDelegateFromID(focus_id); |
| } |
| |
| } // namespace flutter |
