Struct Trail 

pub struct Trail { /* private fields */ }

Focus history with browser-like back/forward behavior.

• record(node) appends and moves the cursor.
• If cursor isn’t at tail, forward history is dropped.
• forget_node(node) removes all occurrences and preserves chain.

Implementations

impl Trail

pub fn new() -> Self

pub fn cursor(&self) -> Option<NodeId>

pub fn is_empty(&self) -> bool

pub fn len(&self) -> usize

pub fn entries(&self) -> Vec<NodeId>

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

pub fn node_at_index(&self, index: usize) -> Option<NodeId>

pub fn seek_to_index(&mut self, index: usize) -> Option<NodeId>

pub fn seek_to_node(&mut self, node: NodeId) -> bool

pub fn record(&mut self, node: NodeId)

Record a focus visit.

pub fn back(&mut self) -> Option<NodeId>

Step back in history.

pub fn forward(&mut self) -> Option<NodeId>

Step forward in history.

pub fn back_wrapping(&mut self) -> Option<NodeId>

pub fn forward_wrapping(&mut self) -> Option<NodeId>

pub fn truncate_to(&mut self, max_len: usize)

pub fn forget_node(&mut self, node: NodeId)

Remove all history entries for a given node id.

Trait Implementations

impl Default for Trail

fn default() -> Self

Returns the “default value” for a type.