mount method

void mount(Component root)

Implementation

void mount(Component root) {
  if (_mounted) {
    throw StateError('ComponentRuntime is already mounted');
  }

  rootComponent = root;
  root.attach(this);

  RenderContext.run(this, () {
    // Phase 1 — resolve the Morphic tree.
    // resolveNode returns a typed ResolveResult — success or failure is
    // explicit, never hidden in exception propagation.
    final result = resolveNode(ComponentRenderNode(root));

    switch (result) {
      case ResolveSuccess(:final tree, :final owners):
        _currentTree = tree;
        _componentTrees[root] = tree;

        // Phase 2 — create the real DOM.
        // owners is passed explicitly so createDom can register each
        // component's root DOM node without touching shared mutable state.
        final dom = createDom(tree, componentOwner: root, owners: owners);
        _componentNodes[root] = dom;

        renderer.mount(tree);
        _mounted = true;

      case ResolveFailure(
        :final error,
        :final stackTrace,
        :final failedComponent,
      ):
        throw StateError(
          'Failed to mount '
          '${failedComponent?.runtimeType ?? root.runtimeType}: '
          '$error\n$stackTrace',
        );
    }
  });
}