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https://github.com/facebook/react.git
synced 2025-11-01 09:12:30 +00:00
Nick ThompsonandPaul O’Shannessy
d270e2b1c7
This ensures we don't add displayName in the transform if it's already been defined. This is especially important when in strict mode, where duplicate properties in an object is an exception.
72 lines
2.3 KiB
JavaScript
72 lines
2.3 KiB
JavaScript
/**
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* Copyright 2013 Facebook, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*global exports:true*/
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"use strict";
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var Syntax = require('esprima-fb').Syntax;
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var utils = require('jstransform/src/utils');
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/**
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* Transforms the following:
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*
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* var MyComponent = React.createClass({
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* render: ...
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* });
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*
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* into:
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*
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* var MyComponent = React.createClass({
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* displayName: 'MyComponent',
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* render: ...
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* });
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*/
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function visitReactDisplayName(traverse, object, path, state) {
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var displayName = object.id.name;
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utils.catchup(object.init['arguments'][0].range[0] + 1, state);
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utils.append("displayName: '" + displayName + "',", state);
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}
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/**
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* Will only run on @jsx files for now.
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*/
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visitReactDisplayName.test = function(object, path, state) {
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if (!!utils.getDocblock(state).jsx &&
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object.type === Syntax.VariableDeclarator &&
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object.id.type === Syntax.Identifier &&
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object.init &&
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object.init.type === Syntax.CallExpression &&
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object.init.callee.type === Syntax.MemberExpression &&
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object.init.callee.object.type === Syntax.Identifier &&
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object.init.callee.object.name === 'React' &&
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object.init.callee.property.type === Syntax.Identifier &&
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object.init.callee.property.name === 'createClass' &&
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object.init['arguments'].length === 1 &&
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object.init['arguments'][0].type === Syntax.ObjectExpression) {
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// Verify that the displayName property isn't already set
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var properties = object.init['arguments'][0].properties;
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return properties.reduce(function (safe, property) {
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var value = property.key.type === 'Identifier'
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? property.key.name
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: property.key.value;
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return safe && value !== 'displayName';
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}, true);
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}
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return false;
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};
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exports.visitReactDisplayName = visitReactDisplayName;
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