| 1 | "use strict";
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| 2 |
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| 3 | Object.defineProperty(exports, "__esModule", {
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| 4 | value: true
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| 5 | });
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| 6 | exports.extractComputedKeys = extractComputedKeys;
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| 7 | exports.injectInitialization = injectInitialization;
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| 8 | exports.memoiseComputedKey = memoiseComputedKey;
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| 9 | var _core = require("@babel/core");
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| 10 | var _traverse = require("@babel/traverse");
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| 11 | const findBareSupers = _traverse.visitors.environmentVisitor({
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| 12 | Super(path) {
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| 13 | const {
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| 14 | node,
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| 15 | parentPath
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| 16 | } = path;
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| 17 | if (parentPath.isCallExpression({
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| 18 | callee: node
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| 19 | })) {
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| 20 | this.push(parentPath);
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| 21 | }
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| 22 | }
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| 23 | });
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| 24 | const referenceVisitor = {
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| 25 | "TSTypeAnnotation|TypeAnnotation"(path) {
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| 26 | path.skip();
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| 27 | },
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| 28 | ReferencedIdentifier(path, {
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| 29 | scope
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| 30 | }) {
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| 31 | if (scope.hasOwnBinding(path.node.name)) {
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| 32 | scope.rename(path.node.name);
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| 33 | path.skip();
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| 34 | }
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| 35 | }
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| 36 | };
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| 37 | function handleClassTDZ(path, state) {
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| 38 | if (state.classBinding && state.classBinding === path.scope.getBinding(path.node.name)) {
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| 39 | const classNameTDZError = state.file.addHelper("classNameTDZError");
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| 40 | const throwNode = _core.types.callExpression(classNameTDZError, [_core.types.stringLiteral(path.node.name)]);
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| 41 | path.replaceWith(_core.types.sequenceExpression([throwNode, path.node]));
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| 42 | path.skip();
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| 43 | }
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| 44 | }
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| 45 | const classFieldDefinitionEvaluationTDZVisitor = {
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| 46 | ReferencedIdentifier: handleClassTDZ
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| 47 | };
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| 48 | function injectInitialization(path, constructor, nodes, renamer, lastReturnsThis) {
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| 49 | if (!nodes.length) return;
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| 50 | const isDerived = !!path.node.superClass;
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| 51 | if (!constructor) {
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| 52 | const newConstructor = _core.types.classMethod("constructor", _core.types.identifier("constructor"), [], _core.types.blockStatement([]));
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| 53 | if (isDerived) {
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| 54 | newConstructor.params = [_core.types.restElement(_core.types.identifier("args"))];
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| 55 | newConstructor.body.body.push(_core.template.statement.ast`super(...args)`);
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| 56 | }
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| 57 | [constructor] = path.get("body").unshiftContainer("body", newConstructor);
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| 58 | }
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| 59 | if (renamer) {
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| 60 | renamer(referenceVisitor, {
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| 61 | scope: constructor.scope
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| 62 | });
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| 63 | }
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| 64 | if (isDerived) {
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| 65 | const bareSupers = [];
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| 66 | constructor.traverse(findBareSupers, bareSupers);
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| 67 | let isFirst = true;
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| 68 | for (const bareSuper of bareSupers) {
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| 69 | if (isFirst) {
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| 70 | isFirst = false;
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| 71 | } else {
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| 72 | nodes = nodes.map(n => _core.types.cloneNode(n));
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| 73 | }
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| 74 | if (!bareSuper.parentPath.isExpressionStatement()) {
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| 75 | const allNodes = [bareSuper.node, ...nodes.map(n => _core.types.toExpression(n))];
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| 76 | if (!lastReturnsThis) allNodes.push(_core.types.thisExpression());
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| 77 | bareSuper.replaceWith(_core.types.sequenceExpression(allNodes));
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| 78 | } else {
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| 79 | bareSuper.insertAfter(nodes);
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| 80 | }
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| 81 | }
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| 82 | } else {
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| 83 | constructor.get("body").unshiftContainer("body", nodes);
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| 84 | }
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| 85 | }
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| 86 | function memoiseComputedKey(keyNode, scope, hint) {
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| 87 | const isUidReference = _core.types.isIdentifier(keyNode) && scope.hasUid(keyNode.name);
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| 88 | if (isUidReference) {
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| 89 | return;
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| 90 | }
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| 91 | const isMemoiseAssignment = _core.types.isAssignmentExpression(keyNode, {
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| 92 | operator: "="
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| 93 | }) && _core.types.isIdentifier(keyNode.left) && scope.hasUid(keyNode.left.name);
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| 94 | if (isMemoiseAssignment) {
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| 95 | return _core.types.cloneNode(keyNode);
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| 96 | } else {
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| 97 | const ident = _core.types.identifier(hint);
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| 98 | scope.push({
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| 99 | id: ident,
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| 100 | kind: "let"
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| 101 | });
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| 102 | return _core.types.assignmentExpression("=", _core.types.cloneNode(ident), keyNode);
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| 103 | }
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| 104 | }
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| 105 | function extractComputedKeys(path, computedPaths, file) {
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| 106 | const {
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| 107 | scope
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| 108 | } = path;
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| 109 | const declarations = [];
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| 110 | const state = {
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| 111 | classBinding: path.node.id && scope.getBinding(path.node.id.name),
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| 112 | file
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| 113 | };
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| 114 | for (const computedPath of computedPaths) {
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| 115 | const computedKey = computedPath.get("key");
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| 116 | if (computedKey.isReferencedIdentifier()) {
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| 117 | handleClassTDZ(computedKey, state);
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| 118 | } else {
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| 119 | computedKey.traverse(classFieldDefinitionEvaluationTDZVisitor, state);
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| 120 | }
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| 121 | const computedNode = computedPath.node;
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| 122 | if (!computedKey.isConstantExpression()) {
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| 123 | const assignment = memoiseComputedKey(computedKey.node, scope, scope.generateUidBasedOnNode(computedKey.node));
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| 124 | if (assignment) {
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| 125 | declarations.push(_core.types.expressionStatement(assignment));
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| 126 | computedNode.key = _core.types.cloneNode(assignment.left);
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| 127 | }
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| 128 | }
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| 129 | }
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| 130 | return declarations;
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| 131 | }
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| 132 |
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| 133 |
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