Method renderComponent

tsunami/engine/render.go:88–119

Pattern 3

(cfunc any, elem *vdom.VDomElem, comp **ComponentImpl, opts *RenderOpts)

// Pattern 3
func (r *RootElem) renderComponent(cfunc any, elem *vdom.VDomElem, comp **ComponentImpl, opts *RenderOpts) {
	if (*comp).Children != nil {
		// Clear Children since custom components don't use them
		for _, child := range (*comp).Children {
			r.unmount(&child)
		}
		(*comp).Children = nil
	}
	props := make(map[string]any)
	for k, v := range elem.Props {
		props[k] = v
	}
	props[ChildrenPropKey] = elem.Children
	vc := makeContextVal(r, *comp, opts)
	rtnElemArr := withGlobalRenderCtx(vc, func() []vdom.VDomElem {
		renderedElem := callCFuncWithErrorGuard(cfunc, props, elem.Tag)
		return vdom.ToElems(renderedElem)
	})

	// Process atom usage after render
	r.updateComponentAtomUsage(*comp, vc.UsedAtoms)

	var rtnElem *vdom.VDomElem
	if len(rtnElemArr) == 0 {
		rtnElem = nil
	} else if len(rtnElemArr) == 1 {
		rtnElem = &rtnElemArr[0]
	} else {
		rtnElem = &vdom.VDomElem{Tag: vdom.FragmentTag, Children: rtnElemArr}
	}
	r.render(rtnElem, &(*comp).RenderedComp, elem.Tag, opts)
}

func (r *RootElem) unmount(comp **ComponentImpl) {
	if *comp == nil {