Struct NodeIdMap 

pub struct NodeIdMap { /* private fields */ }

The result of a DOM reconciliation, from the point of view of anyone holding NodeId-keyed state for a single DOM.

Built from azul_core::diff::DiffResult::node_moves, which contains an entry for EVERY matched node (including nodes that kept their index). The absence of an old NodeId from the map therefore has a precise meaning: that node was unmounted. This is what makes GC possible without a second “alive” set.

The contract for consumers is a single rule:

• NodeIdMap::resolve returns Some(new_id) — the node survived, rewrite the key.
• NodeIdMap::resolve returns None — the node is GONE, drop the state.

Never “keep it, just in case”: a kept key is a key that now denotes a different node.

Implementations

impl NodeIdMap

pub fn from_node_moves(node_moves: &[NodeMove]) -> Self

Build from reconciliation output (DiffResult::node_moves).

pub fn from_pairs<I: IntoIterator<Item = (NodeId, NodeId)>>(pairs: I) -> Self

Build from raw (old, new) pairs — used by tests and by callers that already computed a migration map.

pub fn resolve(&self, old: NodeId) -> Option<NodeId>

Some(new_id) if the node survived the rebuild, None if it was unmounted.

pub fn is_unmounted(&self, old: NodeId) -> bool

true if old no longer exists in the new DOM.

pub fn resolve_dom_node_id( &self, dom: DomId, id: DomNodeId, ) -> Option<DomNodeId>

Resolve a full DomNodeId. Ids belonging to a different DOM are passed through untouched (this reconciliation says nothing about them).

pub const fn as_btree_map(&self) -> &BTreeMap<NodeId, NodeId>

The raw old→new map, for azul_core APIs that take a BTreeMap (DragContext::remap_node_ids, MultiCursorState::remap_node_ids).

pub fn is_empty(&self) -> bool

No matched nodes at all (everything was unmounted / the DOM is brand new).

Trait Implementations

impl Clone for NodeIdMap

fn clone(&self) -> NodeIdMap

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for NodeIdMap

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

Formats the value using the given formatter.

impl Default for NodeIdMap

fn default() -> NodeIdMap

Returns the “default value” for a type.

impl Eq for NodeIdMap

impl PartialEq for NodeIdMap

fn eq(&self, other: &NodeIdMap) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for NodeIdMap