Trait script_layout_interface::wrapper_traits::LayoutNode

source ·

pub trait LayoutNode<'dom>: Copy + Debug + GetStyleAndOpaqueLayoutData<'dom> + TNode + Send + Sync {
    type ConcreteThreadSafeLayoutNode: ThreadSafeLayoutNode<'dom>;

    // Required methods
    fn to_threadsafe(&self) -> Self::ConcreteThreadSafeLayoutNode;
    fn type_id(&self) -> LayoutNodeType;
    unsafe fn initialize_data(&self);
    unsafe fn init_style_and_opaque_layout_data(
        &self,
        data: Box<StyleAndOpaqueLayoutData>
    );
    unsafe fn take_style_and_opaque_layout_data(
        &self
    ) -> Box<StyleAndOpaqueLayoutData>;
    fn is_connected(&self) -> bool;

    // Provided methods
    fn rev_children(self) -> LayoutIterator<ReverseChildrenIterator<Self>> { ... }
    fn traverse_preorder(self) -> TreeIterator<Self> ⓘ { ... }
}

Expand description

A wrapper so that layout can access only the methods that it should have access to. Layout must only ever see these and must never see instances of LayoutDom. FIXME(mrobinson): Send + Sync is required here for Layout 2020, but eventually it should stop sending LayoutNodes to other threads and rely on ThreadSafeLayoutNode or some other mechanism to ensure thread safety.