95 lines
2.3 KiB
JavaScript
95 lines
2.3 KiB
JavaScript
var tokTypes = require("babel").acorn.tokTypes;
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var traverse = require("babel").traverse;
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var t = require("babel").types;
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exports.toToken = function (token) {
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var type = token.type;
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if (type === tokTypes.name) {
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token.type = "Identifier";
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} else if (type === tokTypes.semi || type === tokTypes.comma || type === tokTypes.parenL || type === tokTypes.parenR || type === tokTypes.braceL || type === tokTypes.braceR) {
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token.type = "Punctuator";
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token.value = type.type;
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}
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return token;
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};
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exports.toAST = function (ast) {
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traverse(ast, astTransformVisitor);
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};
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function isCompatTag(tagName) {
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return tagName && /^[a-z]|\-/.test(tagName);
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}
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var astTransformVisitor = {
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noScope: true,
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enter: function (node, parent) {
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if (t.isSpreadProperty(node)) {
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node.type = "Property";
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node.kind = "init";
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node.computed = false;
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node.key = node.value = node.argument;
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delete node.argument;
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}
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if (t.isRestElement(node)) {
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return node.argument;
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}
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if (t.isImportBatchSpecifier(node)) {
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// ImportBatchSpecifier<name> => ImportNamespaceSpecifier<id>
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node.type = "ImportNamespaceSpecifier";
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node.id = node.name;
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delete node.name;
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}
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// classes
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if (t.isReferencedIdentifier(node, parent, { name: "super" })) {
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return t.inherits(t.thisExpression(), node);
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}
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if (t.isClassProperty(node)) {
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// eslint doesn't like these
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this.remove();
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}
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// JSX
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if (t.isJSXIdentifier(node)) {
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if (node.name === "this" && t.isReferenced(node, parent)) {
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return t.inherits(t.thisExpression(), node);
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} else if (!t.isJSXAttribute(parent) && !isCompatTag(node.name)) {
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node.type = "Identifier";
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} else {
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// just ignore this node as it'd be something like <div> or an attribute name
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}
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}
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if (t.isJSXMemberExpression(node)) {
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node.type = "MemberExpression";
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}
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// functions
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if (t.isFunction(node)) {
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node.defaults = [];
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node.params = node.params.map(function (param) {
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if (t.isAssignmentPattern(param)) {
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node.defaults.push(param.right);
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return param.left;
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} else {
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node.defaults.push(null);
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return param;
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}
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});
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}
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if (t.isArrowFunctionExpression(node)) {
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node.type = "FunctionExpression";
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}
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}
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};
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