Struct ModifierChainNodeRef 

pub struct ModifierChainNodeRef<'a> { /* private fields */ }

Implementations

impl<'a> ModifierChainNodeRef<'a>

pub fn with_node<R>(&self, f: impl FnOnce(&dyn ModifierNode) -> R) -> Option<R>

Provides access to the node via a closure, properly handling RefCell borrows. Returns None for sentinel nodes.

pub fn parent(&self) -> Option<Self>

Returns the parent reference, including sentinel head when applicable.

pub fn child(&self) -> Option<Self>

Returns the child reference, including sentinel tail for the last entry.

pub fn kind_set(&self) -> NodeCapabilities

Returns the capability mask for this specific node.

pub fn entry_index(&self) -> Option<usize>

Returns the entry index backing this node when it is part of the chain.

pub fn delegate_depth(&self) -> usize

Returns how many delegate hops separate this node from its root element.

pub fn aggregate_child_capabilities(&self) -> NodeCapabilities

Returns the aggregated capability mask for the subtree rooted at this node.

pub fn is_head(&self) -> bool

Returns true if this reference targets the sentinel head.

pub fn is_tail(&self) -> bool

Returns true if this reference targets the sentinel tail.

pub fn is_sentinel(&self) -> bool

Returns true if this reference targets either sentinel.

pub fn has_capability(&self, mask: NodeCapabilities) -> bool

Returns true if this node has any capability bits present in mask.

pub fn visit_descendants<F>(self, include_self: bool, f: F)

where F: FnMut(ModifierChainNodeRef<'a>),

Visits descendant nodes, optionally including self, in insertion order.

pub fn visit_descendants_matching<F>( self, include_self: bool, mask: NodeCapabilities, f: F, )

where F: FnMut(ModifierChainNodeRef<'a>),

Visits descendant nodes that match mask, short-circuiting when possible.

pub fn visit_ancestors<F>(self, include_self: bool, f: F)

where F: FnMut(ModifierChainNodeRef<'a>),

Visits ancestor nodes up to (but excluding) the sentinel head.

pub fn visit_ancestors_matching<F>( self, include_self: bool, mask: NodeCapabilities, f: F, )

where F: FnMut(ModifierChainNodeRef<'a>),

Visits ancestor nodes that match mask.

pub fn find_parent_focus_target(&self) -> Option<ModifierChainNodeRef<'a>>

Finds the nearest ancestor focus target node.

This is useful for focus navigation to find the parent focusable component in the tree.

pub fn find_first_focus_target(&self) -> Option<ModifierChainNodeRef<'a>>

Finds the first descendant focus target node.

This is useful for focus navigation to find the first focusable child component in the tree.

pub fn has_focus_capability_in_ancestors(&self) -> bool

Returns true if this node or any ancestor has focus capability.

Trait Implementations

impl<'a> Clone for ModifierChainNodeRef<'a>

fn clone(&self) -> ModifierChainNodeRef<'a>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.