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119 lines
2.6 KiB
119 lines
2.6 KiB
4 years ago
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"use strict";
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var t = require("@babel/types");
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var convertComments = require("./convertComments");
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module.exports = function(ast, traverse, code) {
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var state = { source: code };
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// Monkey patch visitor keys in order to be able to traverse the estree nodes
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t.VISITOR_KEYS.Property = t.VISITOR_KEYS.ObjectProperty;
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t.VISITOR_KEYS.MethodDefinition = [
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"key",
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"value",
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"decorators",
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"returnType",
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"typeParameters",
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];
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traverse(ast, astTransformVisitor, null, state);
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delete t.VISITOR_KEYS.Property;
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delete t.VISITOR_KEYS.MethodDefinition;
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};
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var astTransformVisitor = {
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noScope: true,
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enter(path) {
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var node = path.node;
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// private var to track original node type
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node._babelType = node.type;
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if (node.innerComments) {
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node.trailingComments = node.innerComments;
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delete node.innerComments;
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}
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if (node.trailingComments) {
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convertComments(node.trailingComments);
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}
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if (node.leadingComments) {
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convertComments(node.leadingComments);
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}
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},
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exit(path) {
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var node = path.node;
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if (path.isJSXText()) {
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node.type = "Literal";
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}
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if (
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path.isRestElement() &&
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path.parent &&
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path.parent.type === "ObjectPattern"
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) {
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node.type = "ExperimentalRestProperty";
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}
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if (
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path.isSpreadElement() &&
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path.parent &&
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path.parent.type === "ObjectExpression"
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) {
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node.type = "ExperimentalSpreadProperty";
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}
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if (path.isTypeParameter()) {
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node.type = "Identifier";
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node.typeAnnotation = node.bound;
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delete node.bound;
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}
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// flow: prevent "no-undef"
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// for "Component" in: "let x: React.Component"
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if (path.isQualifiedTypeIdentifier()) {
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delete node.id;
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}
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// for "b" in: "var a: { b: Foo }"
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if (path.isObjectTypeProperty()) {
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delete node.key;
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}
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// for "indexer" in: "var a: {[indexer: string]: number}"
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if (path.isObjectTypeIndexer()) {
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delete node.id;
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}
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// for "param" in: "var a: { func(param: Foo): Bar };"
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if (path.isFunctionTypeParam()) {
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delete node.name;
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}
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// modules
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if (path.isImportDeclaration()) {
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delete node.isType;
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}
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// template string range fixes
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if (path.isTemplateLiteral()) {
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for (var j = 0; j < node.quasis.length; j++) {
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var q = node.quasis[j];
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q.range[0] -= 1;
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if (q.tail) {
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q.range[1] += 1;
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} else {
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q.range[1] += 2;
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}
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q.loc.start.column -= 1;
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if (q.tail) {
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q.loc.end.column += 1;
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} else {
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q.loc.end.column += 2;
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}
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}
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}
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},
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};
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