context.js

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.call = call;
exports._call = _call;
exports.isBlacklisted = isBlacklisted;
exports.visit = visit;
exports.skip = skip;
exports.skipKey = skipKey;
exports.stop = stop;
exports.setScope = setScope;
exports.setContext = setContext;
exports.resync = resync;
exports._resyncParent = _resyncParent;
exports._resyncKey = _resyncKey;
exports._resyncList = _resyncList;
exports._resyncRemoved = _resyncRemoved;
exports.popContext = popContext;
exports.pushContext = pushContext;
exports.setup = setup;
exports.setKey = setKey;
exports.requeue = requeue;
exports._getQueueContexts = _getQueueContexts;

var _index = _interopRequireDefault(require("../index"));

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function call(key) {
  const opts = this.opts;
  this.debug(key);

  if (this.node) {
    if (this._call(opts[key])) return true;
  }

  if (this.node) {
    return this._call(opts[this.node.type] && opts[this.node.type][key]);
  }

  return false;
}

function _call(fns) {
  if (!fns) return false;

  for (const fn of fns) {
    if (!fn) continue;
    const node = this.node;
    if (!node) return true;
    const ret = fn.call(this.state, this, this.state);

    if (ret && typeof ret === "object" && typeof ret.then === "function") {
      throw new Error(`You appear to be using a plugin with an async traversal visitor, ` + `which your current version of Babel does not support.` + `If you're using a published plugin, you may need to upgrade ` + `your @babel/core version.`);
    }

    if (ret) {
      throw new Error(`Unexpected return value from visitor method ${fn}`);
    }

    if (this.node !== node) return true;
    if (this.shouldStop || this.shouldSkip || this.removed) return true;
  }

  return false;
}

function isBlacklisted() {
  const blacklist = this.opts.blacklist;
  return blacklist && blacklist.indexOf(this.node.type) > -1;
}

function visit() {
  if (!this.node) {
    return false;
  }

  if (this.isBlacklisted()) {
    return false;
  }

  if (this.opts.shouldSkip && this.opts.shouldSkip(this)) {
    return false;
  }

  if (this.call("enter") || this.shouldSkip) {
    this.debug("Skip...");
    return this.shouldStop;
  }

  this.debug("Recursing into...");

  _index.default.node(this.node, this.opts, this.scope, this.state, this, this.skipKeys);

  this.call("exit");
  return this.shouldStop;
}

function skip() {
  this.shouldSkip = true;
}

function skipKey(key) {
  this.skipKeys[key] = true;
}

function stop() {
  this.shouldStop = true;
  this.shouldSkip = true;
}

function setScope() {
  if (this.opts && this.opts.noScope) return;
  let path = this.parentPath;
  let target;

  while (path && !target) {
    if (path.opts && path.opts.noScope) return;
    target = path.scope;
    path = path.parentPath;
  }

  this.scope = this.getScope(target);
  if (this.scope) this.scope.init();
}

function setContext(context) {
  this.shouldSkip = false;
  this.shouldStop = false;
  this.removed = false;
  this.skipKeys = {};

  if (context) {
    this.context = context;
    this.state = context.state;
    this.opts = context.opts;
  }

  this.setScope();
  return this;
}

function resync() {
  if (this.removed) return;

  this._resyncParent();

  this._resyncList();

  this._resyncKey();
}

function _resyncParent() {
  if (this.parentPath) {
    this.parent = this.parentPath.node;
  }
}

function _resyncKey() {
  if (!this.container) return;
  if (this.node === this.container[this.key]) return;

  if (Array.isArray(this.container)) {
    for (let i = 0; i < this.container.length; i++) {
      if (this.container[i] === this.node) {
        return this.setKey(i);
      }
    }
  } else {
    for (const key of Object.keys(this.container)) {
      if (this.container[key] === this.node) {
        return this.setKey(key);
      }
    }
  }

  this.key = null;
}

function _resyncList() {
  if (!this.parent || !this.inList) return;
  const newContainer = this.parent[this.listKey];
  if (this.container === newContainer) return;
  this.container = newContainer || null;
}

function _resyncRemoved() {
  if (this.key == null || !this.container || this.container[this.key] !== this.node) {
    this._markRemoved();
  }
}

function popContext() {
  this.contexts.pop();

  if (this.contexts.length > 0) {
    this.setContext(this.contexts[this.contexts.length - 1]);
  } else {
    this.setContext(undefined);
  }
}

function pushContext(context) {
  this.contexts.push(context);
  this.setContext(context);
}

function setup(parentPath, container, listKey, key) {
  this.inList = !!listKey;
  this.listKey = listKey;
  this.parentKey = listKey || key;
  this.container = container;
  this.parentPath = parentPath || this.parentPath;
  this.setKey(key);
}

function setKey(key) {
  this.key = key;
  this.node = this.container[this.key];
  this.type = this.node && this.node.type;
}

function requeue(pathToQueue = this) {
  if (pathToQueue.removed) return;
  const contexts = this.contexts;

  for (const context of contexts) {
    context.maybeQueue(pathToQueue);
  }
}

function _getQueueContexts() {
  let path = this;
  let contexts = this.contexts;

  while (!contexts.length) {
    path = path.parentPath;
    if (!path) break;
    contexts = path.contexts;
  }

  return contexts;
}