Module vnode_ffi 

VNode FFI - Functions for constructing VNodes from Windjammer code

This module provides a stable FFI interface that Windjammer components can use to construct VNodes. This enables cross-platform UI rendering:

• Web: VNode → HTML (via simple_renderer)
• Desktop: VNode → egui (via desktop_renderer)

The design uses opaque handles (u64) to reference VNodes stored in a thread-local registry. This avoids complex memory management across the FFI boundary.

Functions

vnode_attr

Add a static attribute to a VNode

vnode_button

Create a button element

vnode_child

Add a child VNode to a parent VNode The child is consumed (moved from registry to parent’s children)

vnode_class

Add a class to a VNode (convenience for class attribute)

vnode_clear

Clear all VNodes from the registry (for cleanup between renders)

vnode_div

Create a div element with optional class and style

vnode_element

Create a new element VNode with a tag name Returns a handle to the VNode

vnode_get

Get a reference to a VNode (without removing it)

vnode_span

Create a span element with text content

vnode_style

Add inline style to a VNode

vnode_take

Get the VNode for a handle and remove it from the registry This is called when the VNode tree is complete and ready to render

vnode_text

Create a text VNode Returns a handle to the VNode