Struct AccessibilityTree 

pub struct AccessibilityTree {
    nodes: FxHashMap<NodeId, ArcRefCell<AccessibilityNode>>,
    opaque_node_to_id: FxHashMap<OpaqueNode, NodeId>,
    tree_id: TreeId,
    epoch: Epoch,
}

A retained, internal representation of the accessibility tree for a document.

accesskit only provides interchange types for tree updates and action requests, so we need to define our own representation for incremental tree building.

Fields

nodes: FxHashMap<NodeId, ArcRefCell<AccessibilityNode>>

opaque_node_to_id: FxHashMap<OpaqueNode, NodeId>

tree_id: TreeId

epoch: Epoch

Implementations

impl AccessibilityTree

pub(crate) fn new(tree_id: TreeId, epoch: Epoch) -> Self

pub(crate) fn update_tree( &mut self, root_dom_node: &ServoLayoutNode<'_>, ) -> Option<TreeUpdate>

Update this tree based on the current state of the given DOM tree, and if anything changed, return an accesskit::TreeUpdate representing what changed.

fn update_node_and_descendants( &mut self, dom_node: &ServoLayoutNode<'_>, tree_update: &mut AccessibilityUpdate, ) -> bool

Update this tree starting at the given DOM node, adding any changed nodes to the given AccessibilityUpdate.

fn get_or_create_node( &mut self, dom_node: &ServoLayoutNode<'_>, ) -> ArcRefCell<AccessibilityNode>

fn assert_node_by_dom_node( &mut self, dom_node: &ServoLayoutNode<'_>, ) -> ArcRefCell<AccessibilityNode>

fn assert_node_by_id(&self, id: NodeId) -> ArcRefCell<AccessibilityNode>

fn id_for_opaque(&mut self, opaque: OpaqueNode) -> NodeId

pub(crate) fn epoch(&self) -> Epoch

Trait Implementations

impl Debug for AccessibilityTree

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.