Struct IfcMembership 

pub struct IfcMembership {
    pub ifc_id: IfcId,
    pub ifc_root_layout_index: usize,
    pub run_index: u32,
}

Tracks a layout node’s membership in an Inline Formatting Context.

Text nodes don’t store their own inline_layout_result - instead, they participate in their parent’s IFC. This struct provides the link from a text node back to its IFC’s layout data.

Architecture

DOM:  <p>Hello <span>world</span>!</p>

Layout Tree:
├── LayoutNode (p) - IFC root
│   └── inline_layout_result: Some(UnifiedLayout)
│   └── ifc_id: IfcId(5)
│
├── LayoutNode (::text "Hello ")
│   └── ifc_membership: Some(IfcMembership { ifc_id: 5, run_index: 0 })
│
├── LayoutNode (span)
│   └── ifc_membership: Some(IfcMembership { ifc_id: 5, run_index: 1 })
│   └── LayoutNode (::text "world")
│       └── ifc_membership: Some(IfcMembership { ifc_id: 5, run_index: 1 })
│
└── LayoutNode (::text "!")
    └── ifc_membership: Some(IfcMembership { ifc_id: 5, run_index: 2 })

Fields

ifc_id: IfcId

The IFC ID this node’s content was laid out in.

ifc_root_layout_index: usize

The index of the IFC root LayoutNode in the layout tree. Used to quickly find the node with inline_layout_result.

run_index: u32

Which run index within the IFC corresponds to this node’s text. Maps to ContentIndex::run_index in the shaped items.

Trait Implementations

impl Clone for IfcMembership

fn clone(&self) -> IfcMembership

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for IfcMembership

impl Debug for IfcMembership

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

Formats the value using the given formatter.

impl Eq for IfcMembership

impl PartialEq for IfcMembership

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for IfcMembership