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240 lines
6.7 KiB
240 lines
6.7 KiB
"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.explode = explode;
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exports.verify = verify;
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exports.merge = merge;
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var virtualTypes = _interopRequireWildcard(require("./path/lib/virtual-types"));
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var t = _interopRequireWildcard(require("@babel/types"));
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var _clone = _interopRequireDefault(require("lodash/clone"));
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function () { return cache; }; return cache; }
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function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } if (obj === null || typeof obj !== "object" && typeof obj !== "function") { return { default: obj }; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; 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; }
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function explode(visitor) {
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if (visitor._exploded) return visitor;
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visitor._exploded = true;
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for (const nodeType of Object.keys(visitor)) {
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if (shouldIgnoreKey(nodeType)) continue;
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const parts = nodeType.split("|");
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if (parts.length === 1) continue;
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const fns = visitor[nodeType];
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delete visitor[nodeType];
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for (const part of parts) {
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visitor[part] = fns;
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}
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}
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verify(visitor);
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delete visitor.__esModule;
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ensureEntranceObjects(visitor);
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ensureCallbackArrays(visitor);
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for (const nodeType of Object.keys(visitor)) {
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if (shouldIgnoreKey(nodeType)) continue;
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const wrapper = virtualTypes[nodeType];
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if (!wrapper) continue;
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const fns = visitor[nodeType];
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for (const type of Object.keys(fns)) {
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fns[type] = wrapCheck(wrapper, fns[type]);
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}
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delete visitor[nodeType];
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if (wrapper.types) {
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for (const type of wrapper.types) {
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if (visitor[type]) {
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mergePair(visitor[type], fns);
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} else {
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visitor[type] = fns;
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}
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}
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} else {
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mergePair(visitor, fns);
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}
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}
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for (const nodeType of Object.keys(visitor)) {
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if (shouldIgnoreKey(nodeType)) continue;
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const fns = visitor[nodeType];
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let aliases = t.FLIPPED_ALIAS_KEYS[nodeType];
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const deprecratedKey = t.DEPRECATED_KEYS[nodeType];
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if (deprecratedKey) {
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console.trace(`Visitor defined for ${nodeType} but it has been renamed to ${deprecratedKey}`);
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aliases = [deprecratedKey];
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}
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if (!aliases) continue;
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delete visitor[nodeType];
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for (const alias of aliases) {
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const existing = visitor[alias];
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if (existing) {
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mergePair(existing, fns);
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} else {
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visitor[alias] = (0, _clone.default)(fns);
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}
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}
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}
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for (const nodeType of Object.keys(visitor)) {
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if (shouldIgnoreKey(nodeType)) continue;
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ensureCallbackArrays(visitor[nodeType]);
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}
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return visitor;
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}
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function verify(visitor) {
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if (visitor._verified) return;
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if (typeof visitor === "function") {
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throw new Error("You passed `traverse()` a function when it expected a visitor object, " + "are you sure you didn't mean `{ enter: Function }`?");
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}
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for (const nodeType of Object.keys(visitor)) {
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if (nodeType === "enter" || nodeType === "exit") {
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validateVisitorMethods(nodeType, visitor[nodeType]);
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}
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if (shouldIgnoreKey(nodeType)) continue;
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if (t.TYPES.indexOf(nodeType) < 0) {
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throw new Error(`You gave us a visitor for the node type ${nodeType} but it's not a valid type`);
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}
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const visitors = visitor[nodeType];
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if (typeof visitors === "object") {
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for (const visitorKey of Object.keys(visitors)) {
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if (visitorKey === "enter" || visitorKey === "exit") {
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validateVisitorMethods(`${nodeType}.${visitorKey}`, visitors[visitorKey]);
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} else {
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throw new Error("You passed `traverse()` a visitor object with the property " + `${nodeType} that has the invalid property ${visitorKey}`);
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}
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}
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}
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}
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visitor._verified = true;
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}
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function validateVisitorMethods(path, val) {
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const fns = [].concat(val);
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for (const fn of fns) {
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if (typeof fn !== "function") {
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throw new TypeError(`Non-function found defined in ${path} with type ${typeof fn}`);
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}
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}
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}
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function merge(visitors, states = [], wrapper) {
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const rootVisitor = {};
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for (let i = 0; i < visitors.length; i++) {
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const visitor = visitors[i];
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const state = states[i];
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explode(visitor);
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for (const type of Object.keys(visitor)) {
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let visitorType = visitor[type];
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if (state || wrapper) {
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visitorType = wrapWithStateOrWrapper(visitorType, state, wrapper);
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}
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const nodeVisitor = rootVisitor[type] = rootVisitor[type] || {};
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mergePair(nodeVisitor, visitorType);
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}
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}
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return rootVisitor;
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}
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function wrapWithStateOrWrapper(oldVisitor, state, wrapper) {
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const newVisitor = {};
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for (const key of Object.keys(oldVisitor)) {
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let fns = oldVisitor[key];
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if (!Array.isArray(fns)) continue;
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fns = fns.map(function (fn) {
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let newFn = fn;
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if (state) {
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newFn = function (path) {
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return fn.call(state, path, state);
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};
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}
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if (wrapper) {
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newFn = wrapper(state.key, key, newFn);
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}
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return newFn;
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});
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newVisitor[key] = fns;
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}
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return newVisitor;
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}
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function ensureEntranceObjects(obj) {
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for (const key of Object.keys(obj)) {
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if (shouldIgnoreKey(key)) continue;
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const fns = obj[key];
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if (typeof fns === "function") {
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obj[key] = {
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enter: fns
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};
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}
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}
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}
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function ensureCallbackArrays(obj) {
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if (obj.enter && !Array.isArray(obj.enter)) obj.enter = [obj.enter];
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if (obj.exit && !Array.isArray(obj.exit)) obj.exit = [obj.exit];
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}
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function wrapCheck(wrapper, fn) {
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const newFn = function (path) {
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if (wrapper.checkPath(path)) {
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return fn.apply(this, arguments);
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}
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};
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newFn.toString = () => fn.toString();
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return newFn;
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}
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function shouldIgnoreKey(key) {
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if (key[0] === "_") return true;
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if (key === "enter" || key === "exit" || key === "shouldSkip") return true;
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if (key === "blacklist" || key === "noScope" || key === "skipKeys") {
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return true;
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}
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return false;
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}
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function mergePair(dest, src) {
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for (const key of Object.keys(src)) {
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dest[key] = [].concat(dest[key] || [], src[key]);
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}
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}
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