253 lines
9.5 KiB
JavaScript
253 lines
9.5 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.jsVariablePolyfill = exports.globalIdentifier = void 0;
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const recast_1 = require("recast");
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const ast_types_1 = require("ast-types");
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const Constants_1 = require("./Constants");
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function assertNever(value) {
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return true;
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}
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exports.globalIdentifier = ast_types_1.builders.identifier(typeof window !== 'object' ? 'global' : 'window');
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const buildGlobalSwitch = (node, dataNode) => {
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return ast_types_1.builders.memberExpression(ast_types_1.builders.conditionalExpression(ast_types_1.builders.binaryExpression('in', ast_types_1.builders.literal(node.name), dataNode), dataNode, exports.globalIdentifier), ast_types_1.builders.identifier(node.name));
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};
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const isInScope = (path) => {
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let scope = path.scope;
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while (scope !== null) {
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if (scope.declares(path.node.name)) {
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return true;
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}
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scope = scope.parent;
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}
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return false;
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};
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const polyfillExceptions = ['this', 'window', 'global'];
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const polyfillVar = (path, dataNode, force = false) => {
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if (!force) {
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if (isInScope(path)) {
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return;
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}
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}
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if (polyfillExceptions.includes(path.node.name)) {
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return;
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}
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path.replace(buildGlobalSwitch(path.node, dataNode));
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};
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const customPatches = {
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MemberExpression(path, parent, dataNode) {
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if (parent.object === path.node || parent.computed) {
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polyfillVar(path, dataNode);
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}
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},
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OptionalMemberExpression(path, parent, dataNode) {
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if (parent.object === path.node) {
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polyfillVar(path, dataNode);
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}
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},
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Property(path, parent, dataNode) {
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var _a, _b, _c;
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if (path.node !== parent.value) {
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return;
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}
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const objPattern = (_b = (_a = path.parent) === null || _a === void 0 ? void 0 : _a.parent) === null || _b === void 0 ? void 0 : _b.node;
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if (!objPattern) {
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return;
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}
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const objParent = (_c = path.parent.parent.parent) === null || _c === void 0 ? void 0 : _c.node;
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if (!objParent) {
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return;
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}
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if (objParent.type === 'VariableDeclarator' && objParent.id === objPattern) {
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return;
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}
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parent.shorthand = false;
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polyfillVar(path, dataNode);
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},
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AssignmentPattern(path, parent, dataNode) {
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if (parent.right === path.node) {
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polyfillVar(path, dataNode);
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}
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},
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VariableDeclarator(path, parent, dataNode) {
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if (parent.init === path.node) {
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polyfillVar(path, dataNode);
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}
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},
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};
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const jsVariablePolyfill = (ast, dataNode) => {
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(0, recast_1.visit)(ast, {
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visitImportExpression(_path) {
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throw new Error('Imports are not supported');
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},
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visitIdentifier(path) {
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this.traverse(path);
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const parent = path.parent.node;
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if (Constants_1.EXEMPT_IDENTIFIER_LIST.includes(path.node.name)) {
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return;
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}
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switch (parent.type) {
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case 'AssignmentPattern':
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case 'Property':
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case 'MemberExpression':
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case 'OptionalMemberExpression':
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case 'VariableDeclarator':
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if (!customPatches[parent.type]) {
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throw new Error(`Couldn\'t find custom patcher for parent type: ${parent.type}`);
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}
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customPatches[parent.type](path, parent, dataNode);
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break;
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case 'BinaryExpression':
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case 'UnaryExpression':
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case 'ArrayExpression':
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case 'AssignmentExpression':
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case 'SequenceExpression':
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case 'YieldExpression':
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case 'UpdateExpression':
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case 'LogicalExpression':
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case 'ConditionalExpression':
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case 'NewExpression':
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case 'CallExpression':
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case 'OptionalCallExpression':
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case 'TaggedTemplateExpression':
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case 'TemplateLiteral':
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case 'AwaitExpression':
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case 'ImportExpression':
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case 'ForStatement':
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case 'IfStatement':
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case 'WhileStatement':
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case 'ForInStatement':
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case 'ForOfStatement':
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case 'SwitchStatement':
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case 'ReturnStatement':
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case 'DoWhileStatement':
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case 'ExpressionStatement':
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case 'ForAwaitStatement':
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case 'ThrowStatement':
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case 'WithStatement':
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case 'TupleExpression':
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polyfillVar(path, dataNode);
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break;
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case 'Super':
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case 'Identifier':
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case 'ArrowFunctionExpression':
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case 'FunctionDeclaration':
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case 'FunctionExpression':
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case 'ThisExpression':
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case 'ObjectExpression':
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case 'MetaProperty':
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case 'ChainExpression':
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case 'PrivateName':
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case 'ParenthesizedExpression':
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case 'Import':
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case 'VariableDeclaration':
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case 'CatchClause':
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case 'BlockStatement':
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case 'TryStatement':
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case 'EmptyStatement':
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case 'LabeledStatement':
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case 'BreakStatement':
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case 'ContinueStatement':
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case 'DebuggerStatement':
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case 'ImportDeclaration':
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case 'ExportDeclaration':
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case 'ExportAllDeclaration':
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case 'ExportDefaultDeclaration':
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case 'Noop':
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case 'ClassMethod':
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case 'ClassPrivateMethod':
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case 'RestElement':
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case 'ArrayPattern':
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case 'ObjectPattern':
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case 'ClassExpression':
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case 'RecordExpression':
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case 'V8IntrinsicIdentifier':
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case 'TopicReference':
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case 'MethodDefinition':
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case 'ClassDeclaration':
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case 'ClassProperty':
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case 'StaticBlock':
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case 'ClassBody':
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case 'ExportNamedDeclaration':
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case 'ClassPrivateProperty':
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case 'ClassAccessorProperty':
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case 'PropertyPattern':
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break;
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case 'SpreadElementPattern':
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case 'SpreadPropertyPattern':
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case 'ClassPropertyDefinition':
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break;
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case 'DeclareClass':
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case 'DeclareModule':
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case 'DeclareVariable':
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case 'DeclareFunction':
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case 'DeclareInterface':
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case 'DeclareTypeAlias':
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case 'DeclareOpaqueType':
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case 'DeclareModuleExports':
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case 'DeclareExportDeclaration':
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case 'DeclareExportAllDeclaration':
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case 'InterfaceDeclaration':
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case 'TypeAlias':
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case 'OpaqueType':
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case 'EnumDeclaration':
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case 'TypeCastExpression':
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break;
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case 'TSAsExpression':
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case 'TSTypeParameter':
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case 'TSTypeAssertion':
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case 'TSDeclareMethod':
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case 'TSIndexSignature':
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case 'TSDeclareFunction':
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case 'TSMethodSignature':
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case 'TSEnumDeclaration':
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case 'TSExportAssignment':
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case 'TSNonNullExpression':
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case 'TSPropertySignature':
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case 'TSModuleDeclaration':
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case 'TSParameterProperty':
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case 'TSTypeCastExpression':
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case 'TSSatisfiesExpression':
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case 'TSTypeAliasDeclaration':
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case 'TSInterfaceDeclaration':
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case 'TSImportEqualsDeclaration':
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case 'TSExternalModuleReference':
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case 'TSInstantiationExpression':
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case 'TSTypeParameterDeclaration':
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case 'TSCallSignatureDeclaration':
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case 'TSNamespaceExportDeclaration':
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case 'TSConstructSignatureDeclaration':
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break;
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case 'DirectiveLiteral':
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case 'StringLiteral':
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case 'NumericLiteral':
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case 'BigIntLiteral':
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case 'NullLiteral':
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case 'Literal':
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case 'RegExpLiteral':
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case 'BooleanLiteral':
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case 'DecimalLiteral':
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break;
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case 'DoExpression':
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case 'BindExpression':
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break;
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case 'JSXIdentifier':
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case 'JSXText':
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case 'JSXElement':
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case 'JSXFragment':
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case 'JSXMemberExpression':
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case 'JSXExpressionContainer':
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break;
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case 'ComprehensionExpression':
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case 'GeneratorExpression':
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polyfillVar(path, dataNode);
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break;
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default:
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assertNever(parent);
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break;
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}
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},
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});
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return ast.program.body;
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};
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exports.jsVariablePolyfill = jsVariablePolyfill;
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//# sourceMappingURL=VariablePolyfill.js.map
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