@apollographql/graphql-language-service-utils/dist/getASTNodeAtPosition.js

Utilities to support the GraphQL Language Service

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.getASTNodeAtPosition = getASTNodeAtPosition;
exports.pointToOffset = pointToOffset;

var _Range = require('./Range');

var _graphql = require('graphql');

function getASTNodeAtPosition(query, ast, point) {
  var offset = pointToOffset(query, point);
  var nodeContainingPosition = void 0;
  (0, _graphql.visit)(ast, {
    enter: function enter(node) {
      if (node.kind !== 'Name' && // We're usually interested in their parents
      node.loc && node.loc.start <= offset && offset <= node.loc.end) {
        nodeContainingPosition = node;
      } else {
        return false;
      }
    },
    leave: function leave(node) {
      if (node.loc && node.loc.start <= offset && offset <= node.loc.end) {
        return false;
      }
    }
  });
  return nodeContainingPosition;
} /**
   *  Copyright (c) Facebook, Inc.
   *  All rights reserved.
   *
   *  This source code is licensed under the license found in the
   *  LICENSE file in the root directory of this source tree.
   *
   *  
   */

function pointToOffset(text, point) {
  var linesUntilPosition = text.split('\n').slice(0, point.line);
  return point.character + linesUntilPosition.map(function (line) {
    return line.length + 1;
  } // count EOL
  ).reduce(function (a, b) {
    return a + b;
  }, 0);
}