Files F120864755

context.js
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Created: Mon, Jul 7, 13:54

context.js
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	"use strict";

	Object.defineProperty(exports, "__esModule", {
	value: true
	});
	exports.default = void 0;
	var _path = require("./path");
	var _t = require("@babel/types");
	const {
	VISITOR_KEYS
	} = _t;
	class TraversalContext {
	constructor(scope, opts, state, parentPath) {
	this.queue = null;
	this.priorityQueue = 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 = VISITOR_KEYS[node.type];
	if (!(keys != null && keys.length)) return false;

	for (const key of keys) {
	if (
	node[key]) {
	return true;
	}
	}
	return false;
	}
	create(node, container, key, listKey) {
	return _path.default.get({
	parentPath: this.parentPath,
	parent: node,
	container,
	key: key,
	listKey
	});
	}
	maybeQueue(path, notPriority) {
	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 = new WeakSet();
	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;

	const {
	node
	} = path;
	if (visited.has(node)) continue;
	if (node) visited.add(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;

	//# sourceMappingURL=context.js.map

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