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"use strict";
/**
* @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.
*/
Object.defineProperty(exports, "__esModule", { value: true });
var tslib_1 = require("tslib");
var ts = require("typescript");
var Lint = require("../index");
var OPTION_FUNCTION_IN_METHOD = "check-function-in-method";
var DEPRECATED_OPTION_FUNCTION_IN_METHOD = "no-this-in-function-in-method";
var Rule = (function (_super) {
tslib_1.__extends(Rule, _super);
function Rule() {
return _super !== null && _super.apply(this, arguments) || this;
}
Rule.prototype.apply = function (sourceFile) {
var _this = this;
var hasOption = function (name) { return _this.ruleArguments.indexOf(name) !== -1; };
var checkFuncInMethod = hasOption(DEPRECATED_OPTION_FUNCTION_IN_METHOD) || hasOption(OPTION_FUNCTION_IN_METHOD);
return this.applyWithFunction(sourceFile, walk, checkFuncInMethod);
};
return Rule;
}(Lint.Rules.AbstractRule));
/* tslint:disable:object-literal-sort-keys */
Rule.metadata = {
ruleName: "no-invalid-this",
description: "Disallows using the `this` keyword outside of classes.",
rationale: "See [the rule's author's rationale here.](https://github.com/palantir/tslint/pull/1105#issue-147549402)",
optionsDescription: (_a = ["\n One argument may be optionally provided:\n\n * `", "` disallows using the `this` keyword in functions within class methods."], _a.raw = ["\n One argument may be optionally provided:\n\n * \\`", "\\` disallows using the \\`this\\` keyword in functions within class methods."], Lint.Utils.dedent(_a, OPTION_FUNCTION_IN_METHOD)),
options: {
type: "array",
items: {
type: "string",
enum: [OPTION_FUNCTION_IN_METHOD],
},
minLength: 0,
maxLength: 1,
},
optionExamples: [true, [true, OPTION_FUNCTION_IN_METHOD]],
type: "functionality",
typescriptOnly: false,
};
/* tslint:enable:object-literal-sort-keys */
Rule.FAILURE_STRING_OUTSIDE = "the \"this\" keyword is disallowed outside of a class body";
Rule.FAILURE_STRING_INSIDE = "the \"this\" keyword is disallowed in function bodies inside class methods, " +
"use arrow functions instead";
exports.Rule = Rule;
function walk(ctx) {
var sourceFile = ctx.sourceFile, checkFuncInMethod = ctx.options;
var inClass = false;
var inFunctionInClass = false;
ts.forEachChild(sourceFile, function cb(node) {
switch (node.kind) {
case ts.SyntaxKind.ClassDeclaration:
case ts.SyntaxKind.ClassExpression:
if (!inClass) {
inClass = true;
ts.forEachChild(node, cb);
inClass = false;
return;
}
break;
case ts.SyntaxKind.FunctionDeclaration:
case ts.SyntaxKind.FunctionExpression:
if (inClass) {
inFunctionInClass = true;
ts.forEachChild(node, cb);
inFunctionInClass = false;
return;
}
break;
case ts.SyntaxKind.ThisKeyword:
if (!inClass) {
ctx.addFailureAtNode(node, Rule.FAILURE_STRING_OUTSIDE);
}
else if (checkFuncInMethod && inFunctionInClass) {
ctx.addFailureAtNode(node, Rule.FAILURE_STRING_INSIDE);
}
return;
}
ts.forEachChild(node, cb);
});
}
var _a;
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