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539 lines
21 KiB
539 lines
21 KiB
2 years ago
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'use strict';
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Object.defineProperty(exports, '__esModule', { value: true });
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var MagicString = require('magic-string');
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var estreeWalker = require('estree-walker');
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var compilerCore = require('@vue/compiler-core');
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var parser = require('@babel/parser');
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var shared = require('@vue/shared');
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function _interopDefaultLegacy (e) { return e && typeof e === 'object' && 'default' in e ? e['default'] : e; }
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var MagicString__default = /*#__PURE__*/_interopDefaultLegacy(MagicString);
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const CONVERT_SYMBOL = '$';
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const ESCAPE_SYMBOL = '$$';
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const shorthands = ['ref', 'computed', 'shallowRef', 'toRef', 'customRef'];
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const transformCheckRE = /[^\w]\$(?:\$|ref|computed|shallowRef)?\s*(\(|\<)/;
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function shouldTransform(src) {
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return transformCheckRE.test(src);
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}
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function transform(src, { filename, sourceMap, parserPlugins, importHelpersFrom = 'vue' } = {}) {
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const plugins = parserPlugins || [];
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if (filename) {
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if (/\.tsx?$/.test(filename)) {
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plugins.push('typescript');
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}
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if (filename.endsWith('x')) {
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plugins.push('jsx');
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}
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}
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const ast = parser.parse(src, {
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sourceType: 'module',
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plugins
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});
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const s = new MagicString__default(src);
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const res = transformAST(ast.program, s, 0);
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// inject helper imports
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if (res.importedHelpers.length) {
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s.prepend(`import { ${res.importedHelpers
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.map(h => `${h} as _${h}`)
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.join(', ')} } from '${importHelpersFrom}'\n`);
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}
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return {
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...res,
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code: s.toString(),
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map: sourceMap
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? s.generateMap({
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source: filename,
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hires: true,
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includeContent: true
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})
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: null
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};
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}
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function transformAST(ast, s, offset = 0, knownRefs, knownProps) {
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// TODO remove when out of experimental
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warnExperimental();
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let convertSymbol = CONVERT_SYMBOL;
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let escapeSymbol = ESCAPE_SYMBOL;
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// macro import handling
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for (const node of ast.body) {
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if (node.type === 'ImportDeclaration' &&
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node.source.value === 'vue/macros') {
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// remove macro imports
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s.remove(node.start + offset, node.end + offset);
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// check aliasing
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for (const specifier of node.specifiers) {
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if (specifier.type === 'ImportSpecifier') {
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const imported = specifier.imported.name;
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const local = specifier.local.name;
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if (local !== imported) {
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if (imported === ESCAPE_SYMBOL) {
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escapeSymbol = local;
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}
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else if (imported === CONVERT_SYMBOL) {
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convertSymbol = local;
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}
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else {
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error(`macro imports for ref-creating methods do not support aliasing.`, specifier);
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}
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}
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}
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}
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}
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}
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const importedHelpers = new Set();
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const rootScope = {};
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const scopeStack = [rootScope];
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let currentScope = rootScope;
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let escapeScope; // inside $$()
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const excludedIds = new WeakSet();
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const parentStack = [];
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const propsLocalToPublicMap = Object.create(null);
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if (knownRefs) {
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for (const key of knownRefs) {
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rootScope[key] = true;
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}
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}
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if (knownProps) {
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for (const key in knownProps) {
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const { local } = knownProps[key];
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rootScope[local] = 'prop';
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propsLocalToPublicMap[local] = key;
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}
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}
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function isRefCreationCall(callee) {
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if (callee === convertSymbol) {
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return convertSymbol;
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}
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if (callee[0] === '$' && shorthands.includes(callee.slice(1))) {
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return callee;
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}
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return false;
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}
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function error(msg, node) {
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const e = new Error(msg);
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e.node = node;
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throw e;
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}
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function helper(msg) {
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importedHelpers.add(msg);
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return `_${msg}`;
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}
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function registerBinding(id, isRef = false) {
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excludedIds.add(id);
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if (currentScope) {
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currentScope[id.name] = isRef;
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}
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else {
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error('registerBinding called without active scope, something is wrong.', id);
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}
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}
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const registerRefBinding = (id) => registerBinding(id, true);
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let tempVarCount = 0;
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function genTempVar() {
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return `__$temp_${++tempVarCount}`;
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}
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function snip(node) {
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return s.original.slice(node.start + offset, node.end + offset);
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}
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function walkScope(node, isRoot = false) {
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for (const stmt of node.body) {
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if (stmt.type === 'VariableDeclaration') {
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walkVariableDeclaration(stmt, isRoot);
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}
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else if (stmt.type === 'FunctionDeclaration' ||
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stmt.type === 'ClassDeclaration') {
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if (stmt.declare || !stmt.id)
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continue;
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registerBinding(stmt.id);
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}
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else if ((stmt.type === 'ForOfStatement' || stmt.type === 'ForInStatement') &&
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stmt.left.type === 'VariableDeclaration') {
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walkVariableDeclaration(stmt.left);
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}
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else if (stmt.type === 'ExportNamedDeclaration' &&
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stmt.declaration &&
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stmt.declaration.type === 'VariableDeclaration') {
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walkVariableDeclaration(stmt.declaration, isRoot);
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}
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else if (stmt.type === 'LabeledStatement' &&
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stmt.body.type === 'VariableDeclaration') {
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walkVariableDeclaration(stmt.body, isRoot);
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}
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}
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}
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function walkVariableDeclaration(stmt, isRoot = false) {
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if (stmt.declare) {
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return;
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}
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for (const decl of stmt.declarations) {
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let refCall;
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const isCall = decl.init &&
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decl.init.type === 'CallExpression' &&
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decl.init.callee.type === 'Identifier';
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if (isCall &&
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(refCall = isRefCreationCall(decl.init.callee.name))) {
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processRefDeclaration(refCall, decl.id, decl.init);
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}
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else {
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const isProps = isRoot && isCall && decl.init.callee.name === 'defineProps';
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for (const id of compilerCore.extractIdentifiers(decl.id)) {
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if (isProps) {
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// for defineProps destructure, only exclude them since they
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// are already passed in as knownProps
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excludedIds.add(id);
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}
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else {
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registerBinding(id);
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}
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}
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}
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}
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}
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function processRefDeclaration(method, id, call) {
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excludedIds.add(call.callee);
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if (method === convertSymbol) {
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// $
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// remove macro
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s.remove(call.callee.start + offset, call.callee.end + offset);
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if (id.type === 'Identifier') {
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// single variable
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registerRefBinding(id);
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}
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else if (id.type === 'ObjectPattern') {
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processRefObjectPattern(id, call);
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}
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else if (id.type === 'ArrayPattern') {
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processRefArrayPattern(id, call);
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}
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}
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else {
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// shorthands
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if (id.type === 'Identifier') {
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registerRefBinding(id);
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// replace call
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s.overwrite(call.start + offset, call.start + method.length + offset, helper(method.slice(1)));
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}
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else {
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error(`${method}() cannot be used with destructure patterns.`, call);
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}
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}
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}
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function processRefObjectPattern(pattern, call, tempVar, path = []) {
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if (!tempVar) {
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tempVar = genTempVar();
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// const { x } = $(useFoo()) --> const __$temp_1 = useFoo()
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s.overwrite(pattern.start + offset, pattern.end + offset, tempVar);
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}
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for (const p of pattern.properties) {
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let nameId;
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let key;
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let defaultValue;
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if (p.type === 'ObjectProperty') {
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if (p.key.start === p.value.start) {
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// shorthand { foo }
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nameId = p.key;
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if (p.value.type === 'Identifier') {
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// avoid shorthand value identifier from being processed
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excludedIds.add(p.value);
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}
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else if (p.value.type === 'AssignmentPattern' &&
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p.value.left.type === 'Identifier') {
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// { foo = 1 }
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excludedIds.add(p.value.left);
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defaultValue = p.value.right;
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}
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}
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else {
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key = p.computed ? p.key : p.key.name;
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if (p.value.type === 'Identifier') {
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// { foo: bar }
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nameId = p.value;
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}
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else if (p.value.type === 'ObjectPattern') {
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processRefObjectPattern(p.value, call, tempVar, [...path, key]);
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}
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else if (p.value.type === 'ArrayPattern') {
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processRefArrayPattern(p.value, call, tempVar, [...path, key]);
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}
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else if (p.value.type === 'AssignmentPattern') {
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if (p.value.left.type === 'Identifier') {
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// { foo: bar = 1 }
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nameId = p.value.left;
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defaultValue = p.value.right;
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}
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else if (p.value.left.type === 'ObjectPattern') {
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processRefObjectPattern(p.value.left, call, tempVar, [
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...path,
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[key, p.value.right]
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]);
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}
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else if (p.value.left.type === 'ArrayPattern') {
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processRefArrayPattern(p.value.left, call, tempVar, [
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...path,
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[key, p.value.right]
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]);
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}
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else ;
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}
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}
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}
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else {
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// rest element { ...foo }
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error(`reactivity destructure does not support rest elements.`, p);
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}
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if (nameId) {
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registerRefBinding(nameId);
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// inject toRef() after original replaced pattern
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const source = pathToString(tempVar, path);
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const keyStr = shared.isString(key)
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? `'${key}'`
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: key
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? snip(key)
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: `'${nameId.name}'`;
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const defaultStr = defaultValue ? `, ${snip(defaultValue)}` : ``;
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s.appendLeft(call.end + offset, `,\n ${nameId.name} = ${helper('toRef')}(${source}, ${keyStr}${defaultStr})`);
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}
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}
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}
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function processRefArrayPattern(pattern, call, tempVar, path = []) {
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if (!tempVar) {
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// const [x] = $(useFoo()) --> const __$temp_1 = useFoo()
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tempVar = genTempVar();
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s.overwrite(pattern.start + offset, pattern.end + offset, tempVar);
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}
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for (let i = 0; i < pattern.elements.length; i++) {
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const e = pattern.elements[i];
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if (!e)
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continue;
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let nameId;
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let defaultValue;
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if (e.type === 'Identifier') {
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// [a] --> [__a]
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nameId = e;
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}
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else if (e.type === 'AssignmentPattern') {
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// [a = 1]
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nameId = e.left;
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defaultValue = e.right;
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}
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else if (e.type === 'RestElement') {
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// [...a]
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error(`reactivity destructure does not support rest elements.`, e);
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}
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else if (e.type === 'ObjectPattern') {
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processRefObjectPattern(e, call, tempVar, [...path, i]);
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}
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else if (e.type === 'ArrayPattern') {
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processRefArrayPattern(e, call, tempVar, [...path, i]);
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}
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if (nameId) {
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registerRefBinding(nameId);
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// inject toRef() after original replaced pattern
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const source = pathToString(tempVar, path);
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const defaultStr = defaultValue ? `, ${snip(defaultValue)}` : ``;
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s.appendLeft(call.end + offset, `,\n ${nameId.name} = ${helper('toRef')}(${source}, ${i}${defaultStr})`);
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}
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}
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}
|
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function pathToString(source, path) {
|
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|
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if (path.length) {
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for (const seg of path) {
|
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if (shared.isArray(seg)) {
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source = `(${source}${segToString(seg[0])} || ${snip(seg[1])})`;
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}
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else {
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source += segToString(seg);
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}
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}
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}
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return source;
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}
|
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function segToString(seg) {
|
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|
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if (typeof seg === 'number') {
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|
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return `[${seg}]`;
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|
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}
|
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|
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else if (typeof seg === 'string') {
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return `.${seg}`;
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}
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else {
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return snip(seg);
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}
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}
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function rewriteId(scope, id, parent, parentStack) {
|
||
|
|
if (shared.hasOwn(scope, id.name)) {
|
||
|
|
const bindingType = scope[id.name];
|
||
|
|
if (bindingType) {
|
||
|
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const isProp = bindingType === 'prop';
|
||
|
|
if (compilerCore.isStaticProperty(parent) && parent.shorthand) {
|
||
|
|
// let binding used in a property shorthand
|
||
|
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// skip for destructure patterns
|
||
|
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if (!parent.inPattern ||
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||
|
|
compilerCore.isInDestructureAssignment(parent, parentStack)) {
|
||
|
|
if (isProp) {
|
||
|
|
if (escapeScope) {
|
||
|
|
// prop binding in $$()
|
||
|
|
// { prop } -> { prop: __props_prop }
|
||
|
|
registerEscapedPropBinding(id);
|
||
|
|
s.appendLeft(id.end + offset, `: __props_${propsLocalToPublicMap[id.name]}`);
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
// { prop } -> { prop: __props.prop }
|
||
|
|
s.appendLeft(id.end + offset, `: ${shared.genPropsAccessExp(propsLocalToPublicMap[id.name])}`);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
// { foo } -> { foo: foo.value }
|
||
|
|
s.appendLeft(id.end + offset, `: ${id.name}.value`);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
if (isProp) {
|
||
|
|
if (escapeScope) {
|
||
|
|
// x --> __props_x
|
||
|
|
registerEscapedPropBinding(id);
|
||
|
|
s.overwrite(id.start + offset, id.end + offset, `__props_${propsLocalToPublicMap[id.name]}`);
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
// x --> __props.x
|
||
|
|
s.overwrite(id.start + offset, id.end + offset, shared.genPropsAccessExp(propsLocalToPublicMap[id.name]));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
// x --> x.value
|
||
|
|
s.appendLeft(id.end + offset, '.value');
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
const propBindingRefs = {};
|
||
|
|
function registerEscapedPropBinding(id) {
|
||
|
|
if (!propBindingRefs.hasOwnProperty(id.name)) {
|
||
|
|
propBindingRefs[id.name] = true;
|
||
|
|
const publicKey = propsLocalToPublicMap[id.name];
|
||
|
|
s.prependRight(offset, `const __props_${publicKey} = ${helper(`toRef`)}(__props, '${publicKey}')\n`);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
// check root scope first
|
||
|
|
walkScope(ast, true);
|
||
|
|
estreeWalker.walk(ast, {
|
||
|
|
enter(node, parent) {
|
||
|
|
parent && parentStack.push(parent);
|
||
|
|
// function scopes
|
||
|
|
if (compilerCore.isFunctionType(node)) {
|
||
|
|
scopeStack.push((currentScope = {}));
|
||
|
|
compilerCore.walkFunctionParams(node, registerBinding);
|
||
|
|
if (node.body.type === 'BlockStatement') {
|
||
|
|
walkScope(node.body);
|
||
|
|
}
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
// catch param
|
||
|
|
if (node.type === 'CatchClause') {
|
||
|
|
scopeStack.push((currentScope = {}));
|
||
|
|
if (node.param && node.param.type === 'Identifier') {
|
||
|
|
registerBinding(node.param);
|
||
|
|
}
|
||
|
|
walkScope(node.body);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
// non-function block scopes
|
||
|
|
if (node.type === 'BlockStatement' && !compilerCore.isFunctionType(parent)) {
|
||
|
|
scopeStack.push((currentScope = {}));
|
||
|
|
walkScope(node);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
// skip type nodes
|
||
|
|
if (parent &&
|
||
|
|
parent.type.startsWith('TS') &&
|
||
|
|
parent.type !== 'TSAsExpression' &&
|
||
|
|
parent.type !== 'TSNonNullExpression' &&
|
||
|
|
parent.type !== 'TSTypeAssertion') {
|
||
|
|
return this.skip();
|
||
|
|
}
|
||
|
|
if (node.type === 'Identifier' &&
|
||
|
|
// if inside $$(), skip unless this is a destructured prop binding
|
||
|
|
!(escapeScope && rootScope[node.name] !== 'prop') &&
|
||
|
|
compilerCore.isReferencedIdentifier(node, parent, parentStack) &&
|
||
|
|
!excludedIds.has(node)) {
|
||
|
|
// walk up the scope chain to check if id should be appended .value
|
||
|
|
let i = scopeStack.length;
|
||
|
|
while (i--) {
|
||
|
|
if (rewriteId(scopeStack[i], node, parent, parentStack)) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (node.type === 'CallExpression' && node.callee.type === 'Identifier') {
|
||
|
|
const callee = node.callee.name;
|
||
|
|
const refCall = isRefCreationCall(callee);
|
||
|
|
if (refCall && (!parent || parent.type !== 'VariableDeclarator')) {
|
||
|
|
return error(`${refCall} can only be used as the initializer of ` +
|
||
|
|
`a variable declaration.`, node);
|
||
|
|
}
|
||
|
|
if (callee === escapeSymbol) {
|
||
|
|
s.remove(node.callee.start + offset, node.callee.end + offset);
|
||
|
|
escapeScope = node;
|
||
|
|
}
|
||
|
|
// TODO remove when out of experimental
|
||
|
|
if (callee === '$raw') {
|
||
|
|
error(`$raw() has been replaced by $$(). ` +
|
||
|
|
`See ${RFC_LINK} for latest updates.`, node);
|
||
|
|
}
|
||
|
|
if (callee === '$fromRef') {
|
||
|
|
error(`$fromRef() has been replaced by $(). ` +
|
||
|
|
`See ${RFC_LINK} for latest updates.`, node);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
},
|
||
|
|
leave(node, parent) {
|
||
|
|
parent && parentStack.pop();
|
||
|
|
if ((node.type === 'BlockStatement' && !compilerCore.isFunctionType(parent)) ||
|
||
|
|
compilerCore.isFunctionType(node)) {
|
||
|
|
scopeStack.pop();
|
||
|
|
currentScope = scopeStack[scopeStack.length - 1] || null;
|
||
|
|
}
|
||
|
|
if (node === escapeScope) {
|
||
|
|
escapeScope = undefined;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
});
|
||
|
|
return {
|
||
|
|
rootRefs: Object.keys(rootScope).filter(key => rootScope[key] === true),
|
||
|
|
importedHelpers: [...importedHelpers]
|
||
|
|
};
|
||
|
|
}
|
||
|
|
const RFC_LINK = `https://github.com/vuejs/rfcs/discussions/369`;
|
||
|
|
const hasWarned = {};
|
||
|
|
function warnExperimental() {
|
||
|
|
// eslint-disable-next-line
|
||
|
|
if (typeof window !== 'undefined') {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
warnOnce(`Reactivity transform is an experimental feature.\n` +
|
||
|
|
`Experimental features may change behavior between patch versions.\n` +
|
||
|
|
`It is recommended to pin your vue dependencies to exact versions to avoid breakage.\n` +
|
||
|
|
`You can follow the proposal's status at ${RFC_LINK}.`);
|
||
|
|
}
|
||
|
|
function warnOnce(msg) {
|
||
|
|
const isNodeProd = typeof process !== 'undefined' && process.env.NODE_ENV === 'production';
|
||
|
|
if (!isNodeProd && !false && !hasWarned[msg]) {
|
||
|
|
hasWarned[msg] = true;
|
||
|
|
warn(msg);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
function warn(msg) {
|
||
|
|
console.warn(`\x1b[1m\x1b[33m[@vue/reactivity-transform]\x1b[0m\x1b[33m ${msg}\x1b[0m\n`);
|
||
|
|
}
|
||
|
|
|
||
|
|
exports.shouldTransform = shouldTransform;
|
||
|
|
exports.transform = transform;
|
||
|
|
exports.transformAST = transformAST;
|