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366 lines
10 KiB
366 lines
10 KiB
/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Tobias Koppers @sokra
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*/
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"use strict";
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const RuntimeGlobals = require("../RuntimeGlobals");
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const AMDDefineDependency = require("./AMDDefineDependency");
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const AMDRequireArrayDependency = require("./AMDRequireArrayDependency");
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const AMDRequireContextDependency = require("./AMDRequireContextDependency");
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const AMDRequireItemDependency = require("./AMDRequireItemDependency");
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const ConstDependency = require("./ConstDependency");
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const ContextDependencyHelpers = require("./ContextDependencyHelpers");
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const DynamicExports = require("./DynamicExports");
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const LocalModuleDependency = require("./LocalModuleDependency");
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const { addLocalModule, getLocalModule } = require("./LocalModulesHelpers");
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/** @typedef {import("estree").CallExpression} CallExpression */
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/** @typedef {import("../javascript/JavascriptParser")} JavascriptParser */
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/**
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* @param {CallExpression} expr expression
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* @returns {boolean} true if it's a bound function expression
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*/
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const isBoundFunctionExpression = expr => {
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if (expr.type !== "CallExpression") return false;
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if (expr.callee.type !== "MemberExpression") return false;
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if (expr.callee.computed) return false;
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if (expr.callee.object.type !== "FunctionExpression") return false;
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if (expr.callee.property.type !== "Identifier") return false;
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if (expr.callee.property.name !== "bind") return false;
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return true;
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};
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const isUnboundFunctionExpression = expr => {
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if (expr.type === "FunctionExpression") return true;
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if (expr.type === "ArrowFunctionExpression") return true;
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return false;
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};
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const isCallable = expr => {
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if (isUnboundFunctionExpression(expr)) return true;
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if (isBoundFunctionExpression(expr)) return true;
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return false;
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};
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class AMDDefineDependencyParserPlugin {
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constructor(options) {
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this.options = options;
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}
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/**
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* @param {JavascriptParser} parser the parser
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* @returns {void}
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*/
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apply(parser) {
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parser.hooks.call
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.for("define")
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.tap(
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"AMDDefineDependencyParserPlugin",
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this.processCallDefine.bind(this, parser)
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);
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}
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processArray(parser, expr, param, identifiers, namedModule) {
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if (param.isArray()) {
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param.items.forEach((param, idx) => {
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if (
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param.isString() &&
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["require", "module", "exports"].includes(param.string)
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)
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identifiers[idx] = param.string;
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const result = this.processItem(parser, expr, param, namedModule);
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if (result === undefined) {
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this.processContext(parser, expr, param);
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}
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});
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return true;
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} else if (param.isConstArray()) {
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const deps = [];
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param.array.forEach((request, idx) => {
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let dep;
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let localModule;
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if (request === "require") {
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identifiers[idx] = request;
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dep = RuntimeGlobals.require;
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} else if (["exports", "module"].includes(request)) {
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identifiers[idx] = request;
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dep = request;
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} else if ((localModule = getLocalModule(parser.state, request))) {
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localModule.flagUsed();
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dep = new LocalModuleDependency(localModule, undefined, false);
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dep.loc = expr.loc;
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parser.state.module.addPresentationalDependency(dep);
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} else {
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dep = this.newRequireItemDependency(request);
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dep.loc = expr.loc;
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dep.optional = !!parser.scope.inTry;
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parser.state.current.addDependency(dep);
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}
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deps.push(dep);
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});
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const dep = this.newRequireArrayDependency(deps, param.range);
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dep.loc = expr.loc;
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dep.optional = !!parser.scope.inTry;
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parser.state.module.addPresentationalDependency(dep);
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return true;
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}
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}
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processItem(parser, expr, param, namedModule) {
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if (param.isConditional()) {
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param.options.forEach(param => {
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const result = this.processItem(parser, expr, param);
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if (result === undefined) {
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this.processContext(parser, expr, param);
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}
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});
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return true;
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} else if (param.isString()) {
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let dep, localModule;
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if (param.string === "require") {
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dep = new ConstDependency(RuntimeGlobals.require, param.range, [
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RuntimeGlobals.require
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]);
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} else if (param.string === "exports") {
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dep = new ConstDependency("exports", param.range, [
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RuntimeGlobals.exports
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]);
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} else if (param.string === "module") {
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dep = new ConstDependency("module", param.range, [
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RuntimeGlobals.module
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]);
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} else if (
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(localModule = getLocalModule(parser.state, param.string, namedModule))
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) {
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localModule.flagUsed();
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dep = new LocalModuleDependency(localModule, param.range, false);
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} else {
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dep = this.newRequireItemDependency(param.string, param.range);
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dep.optional = !!parser.scope.inTry;
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parser.state.current.addDependency(dep);
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return true;
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}
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dep.loc = expr.loc;
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parser.state.module.addPresentationalDependency(dep);
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return true;
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}
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}
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processContext(parser, expr, param) {
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const dep = ContextDependencyHelpers.create(
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AMDRequireContextDependency,
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param.range,
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param,
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expr,
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this.options,
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{
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category: "amd"
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},
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parser
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);
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if (!dep) return;
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dep.loc = expr.loc;
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dep.optional = !!parser.scope.inTry;
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parser.state.current.addDependency(dep);
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return true;
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}
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processCallDefine(parser, expr) {
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let array, fn, obj, namedModule;
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switch (expr.arguments.length) {
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case 1:
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if (isCallable(expr.arguments[0])) {
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// define(f() {…})
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fn = expr.arguments[0];
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} else if (expr.arguments[0].type === "ObjectExpression") {
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// define({…})
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obj = expr.arguments[0];
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} else {
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// define(expr)
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// unclear if function or object
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obj = fn = expr.arguments[0];
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}
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break;
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case 2:
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if (expr.arguments[0].type === "Literal") {
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namedModule = expr.arguments[0].value;
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// define("…", …)
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if (isCallable(expr.arguments[1])) {
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// define("…", f() {…})
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fn = expr.arguments[1];
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} else if (expr.arguments[1].type === "ObjectExpression") {
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// define("…", {…})
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obj = expr.arguments[1];
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} else {
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// define("…", expr)
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// unclear if function or object
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obj = fn = expr.arguments[1];
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}
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} else {
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array = expr.arguments[0];
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if (isCallable(expr.arguments[1])) {
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// define([…], f() {})
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fn = expr.arguments[1];
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} else if (expr.arguments[1].type === "ObjectExpression") {
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// define([…], {…})
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obj = expr.arguments[1];
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} else {
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// define([…], expr)
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// unclear if function or object
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obj = fn = expr.arguments[1];
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}
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}
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break;
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case 3:
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// define("…", […], f() {…})
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namedModule = expr.arguments[0].value;
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array = expr.arguments[1];
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if (isCallable(expr.arguments[2])) {
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// define("…", […], f() {})
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fn = expr.arguments[2];
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} else if (expr.arguments[2].type === "ObjectExpression") {
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// define("…", […], {…})
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obj = expr.arguments[2];
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} else {
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// define("…", […], expr)
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// unclear if function or object
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obj = fn = expr.arguments[2];
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}
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break;
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default:
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return;
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}
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DynamicExports.bailout(parser.state);
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let fnParams = null;
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let fnParamsOffset = 0;
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if (fn) {
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if (isUnboundFunctionExpression(fn)) {
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fnParams = fn.params;
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} else if (isBoundFunctionExpression(fn)) {
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fnParams = fn.callee.object.params;
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fnParamsOffset = fn.arguments.length - 1;
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if (fnParamsOffset < 0) {
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fnParamsOffset = 0;
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}
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}
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}
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let fnRenames = new Map();
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if (array) {
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const identifiers = {};
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const param = parser.evaluateExpression(array);
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const result = this.processArray(
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parser,
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expr,
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param,
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identifiers,
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namedModule
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);
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if (!result) return;
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if (fnParams) {
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fnParams = fnParams.slice(fnParamsOffset).filter((param, idx) => {
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if (identifiers[idx]) {
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fnRenames.set(param.name, parser.getVariableInfo(identifiers[idx]));
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return false;
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}
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return true;
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});
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}
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} else {
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const identifiers = ["require", "exports", "module"];
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if (fnParams) {
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fnParams = fnParams.slice(fnParamsOffset).filter((param, idx) => {
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if (identifiers[idx]) {
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fnRenames.set(param.name, parser.getVariableInfo(identifiers[idx]));
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return false;
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}
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return true;
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});
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}
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}
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let inTry;
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if (fn && isUnboundFunctionExpression(fn)) {
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inTry = parser.scope.inTry;
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parser.inScope(fnParams, () => {
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for (const [name, varInfo] of fnRenames) {
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parser.setVariable(name, varInfo);
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}
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parser.scope.inTry = inTry;
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if (fn.body.type === "BlockStatement") {
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parser.detectMode(fn.body.body);
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const prev = parser.prevStatement;
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parser.preWalkStatement(fn.body);
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parser.prevStatement = prev;
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parser.walkStatement(fn.body);
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} else {
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parser.walkExpression(fn.body);
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}
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});
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} else if (fn && isBoundFunctionExpression(fn)) {
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inTry = parser.scope.inTry;
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parser.inScope(
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fn.callee.object.params.filter(
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i => !["require", "module", "exports"].includes(i.name)
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),
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() => {
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for (const [name, varInfo] of fnRenames) {
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parser.setVariable(name, varInfo);
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}
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parser.scope.inTry = inTry;
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if (fn.callee.object.body.type === "BlockStatement") {
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parser.detectMode(fn.callee.object.body.body);
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const prev = parser.prevStatement;
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parser.preWalkStatement(fn.callee.object.body);
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parser.prevStatement = prev;
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parser.walkStatement(fn.callee.object.body);
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} else {
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parser.walkExpression(fn.callee.object.body);
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}
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}
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);
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if (fn.arguments) {
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parser.walkExpressions(fn.arguments);
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}
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} else if (fn || obj) {
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parser.walkExpression(fn || obj);
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}
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const dep = this.newDefineDependency(
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expr.range,
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array ? array.range : null,
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fn ? fn.range : null,
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obj ? obj.range : null,
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namedModule ? namedModule : null
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);
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dep.loc = expr.loc;
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if (namedModule) {
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dep.localModule = addLocalModule(parser.state, namedModule);
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}
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parser.state.module.addPresentationalDependency(dep);
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return true;
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}
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newDefineDependency(
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range,
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arrayRange,
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functionRange,
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objectRange,
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namedModule
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) {
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return new AMDDefineDependency(
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range,
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arrayRange,
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functionRange,
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objectRange,
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namedModule
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);
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}
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newRequireArrayDependency(depsArray, range) {
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return new AMDRequireArrayDependency(depsArray, range);
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}
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newRequireItemDependency(request, range) {
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return new AMDRequireItemDependency(request, range);
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}
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}
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module.exports = AMDDefineDependencyParserPlugin;
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