text: /**
   * @license
   * Copyright 2016 Palantir Technologies, Inc.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  import * as Lint from "tslint";
  import { isJsxExpression } from "tsutils/typeguard/3.0";
  import * as ts from "typescript";
  
  export class Rule extends Lint.Rules.AbstractRule {
      /* tslint:disable:object-literal-sort-keys */
      public static metadata: Lint.IRuleMetadata = {
          ruleName: "jsx-no-multiline-js",
          description: "Checks for multiline JS expressions inside JSX expressions",
          descriptionDetails: "This helps reduce mental overhead when parsing JSX syntax",
          options: null,
          optionsDescription: "",
          optionExamples: ["true"],
          type: "style",
          typescriptOnly: false,
      };
      /* tslint:enable:object-literal-sort-keys */
  
      public static FAILURE_STRING = "Multiline JS expressions inside JSX are forbidden";
  
      public apply(sourceFile: ts.SourceFile): Lint.RuleFailure[] {
          return this.applyWithFunction(sourceFile, walk);
      }
  }
  
  function walk(ctx: Lint.WalkContext<void>): void {
      return ts.forEachChild(ctx.sourceFile, function cb(node: ts.Node): void {
          if (isJsxExpression(node)) {
              if (node.getText().indexOf("\n") > -1) {
                  ctx.addFailureAt(node.getStart(), node.getWidth(), Rule.FAILURE_STRING);
              }
          }
          return ts.forEachChild(node, cb);
      });
  }
  