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context.js 3.80 KiB
"use strict";
Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
var _path = _interopRequireDefault(require("./path"));
var t = _interopRequireWildcard(require("@babel/types"));
function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function () { return cache; }; return cache; }
function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; if (obj != null) { var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
const testing = process.env.NODE_ENV === "test";
class TraversalContext {
  constructor(scope, opts, state, parentPath) {
    this.queue = null;
    this.parentPath = parentPath;
    this.scope = scope;
    this.state = state;
    this.opts = opts;
  shouldVisit(node) {
    const opts = this.opts;
    if (opts.enter || opts.exit) return true;
    if (opts[node.type]) return true;
    const keys = t.VISITOR_KEYS[node.type];
    if (!keys || !keys.length) return false;
    for (const key of keys) {
      if (node[key]) return true;
    return false;
  create(node, obj, key, listKey) {
    return _path.default.get({
      parentPath: this.parentPath,
      parent: node,
      container: obj,
      key: key,
      listKey
    });
  maybeQueue(path, notPriority) {
    if (this.trap) {
      throw new Error("Infinite cycle detected");
    if (this.queue) {
      if (notPriority) {
        this.queue.push(path);
      } else {
        this.priorityQueue.push(path);
  visitMultiple(container, parent, listKey) {
    if (container.length === 0) return false;
    const queue = [];
for (let key = 0; key < container.length; key++) { const node = container[key]; if (node && this.shouldVisit(node)) { queue.push(this.create(parent, container, key, listKey)); } } return this.visitQueue(queue); } visitSingle(node, key) { if (this.shouldVisit(node[key])) { return this.visitQueue([this.create(node, node, key)]); } else { return false; } } visitQueue(queue) { this.queue = queue; this.priorityQueue = []; const visited = []; let stop = false; for (const path of queue) { path.resync(); if (path.contexts.length === 0 || path.contexts[path.contexts.length - 1] !== this) { path.pushContext(this); } if (path.key === null) continue; if (testing && queue.length >= 10000) { this.trap = true; } if (visited.indexOf(path.node) >= 0) continue; visited.push(path.node); if (path.visit()) { stop = true; break; } if (this.priorityQueue.length) { stop = this.visitQueue(this.priorityQueue); this.priorityQueue = []; this.queue = queue; if (stop) break; } } for (const path of queue) { path.popContext(); } this.queue = null; return stop; } visit(node, key) { const nodes = node[key]; if (!nodes) return false; if (Array.isArray(nodes)) { return this.visitMultiple(nodes, node, key); } else { return this.visitSingle(node, key);
} } } exports.default = TraversalContext;