969f602dd4
Fixed-step world runtime, event bus wire protocol between lanes, integration seam (game.ts) with placeholder ball. Lanes A/B/C own disjoint dirs. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
108 lines
2.7 KiB
JavaScript
108 lines
2.7 KiB
JavaScript
'use strict'
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let AtRule = require('./at-rule')
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let Comment = require('./comment')
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let Declaration = require('./declaration')
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let Input = require('./input')
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let PreviousMap = require('./previous-map')
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let Root = require('./root')
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let Rule = require('./rule')
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function hydrateInputs(json, inputs) {
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if (!json.inputs) return inputs
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return json.inputs.map(input => {
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let inputHydrated = { ...input, __proto__: Input.prototype }
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if (inputHydrated.map) {
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inputHydrated.map = {
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...inputHydrated.map,
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__proto__: PreviousMap.prototype
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}
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}
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return inputHydrated
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})
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}
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function constructNode(json, inputs, children) {
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let defaults = { ...json }
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delete defaults.inputs
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delete defaults.nodes
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if (defaults.source) {
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let { inputId, ...source } = defaults.source
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defaults.source = source
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if (inputId != null) {
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defaults.source.input = inputs[inputId]
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}
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}
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let node
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if (defaults.type === 'root') {
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node = new Root(defaults)
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} else if (defaults.type === 'decl') {
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node = new Declaration(defaults)
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} else if (defaults.type === 'rule') {
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node = new Rule(defaults)
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} else if (defaults.type === 'comment') {
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node = new Comment(defaults)
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} else if (defaults.type === 'atrule') {
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node = new AtRule(defaults)
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} else {
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throw new Error('Unknown node type: ' + json.type)
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}
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// Rehydrated children are attached after construction. Passing them
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// through the container constructor would re-run insertion spacing
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// normalization and overwrite each child's own `raws.before`.
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if (children) {
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node.nodes = children
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for (let child of children) child.parent = node
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}
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return node
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}
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function fromJSON(json, inputs) {
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if (Array.isArray(json)) return json.map(n => fromJSON(n))
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// An explicit stack instead of recursive calls to survive deeply
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// nested trees. Children are rehydrated before their parent node
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// is constructed.
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let result
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let stack = [
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{ childIndex: 0, children: [], inputs: hydrateInputs(json, inputs), json }
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]
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while (stack.length > 0) {
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let frame = stack[stack.length - 1]
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let jsonNodes = frame.json.nodes
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if (jsonNodes && frame.childIndex < jsonNodes.length) {
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let childJson = jsonNodes[frame.childIndex]
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frame.childIndex += 1
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stack.push({
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childIndex: 0,
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children: [],
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inputs: hydrateInputs(childJson, frame.inputs),
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json: childJson
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})
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continue
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}
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stack.pop()
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let node = constructNode(
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frame.json,
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frame.inputs,
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jsonNodes ? frame.children : undefined
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)
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if (stack.length > 0) {
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stack[stack.length - 1].children.push(node)
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} else {
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result = node
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}
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}
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return result
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}
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module.exports = fromJSON
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fromJSON.default = fromJSON
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